CN202002724U - Self-calibrating triaxial vibration monitoring and environment monitoring acquisition device - Google Patents
Self-calibrating triaxial vibration monitoring and environment monitoring acquisition device Download PDFInfo
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- CN202002724U CN202002724U CN2010206608855U CN201020660885U CN202002724U CN 202002724 U CN202002724 U CN 202002724U CN 2010206608855 U CN2010206608855 U CN 2010206608855U CN 201020660885 U CN201020660885 U CN 201020660885U CN 202002724 U CN202002724 U CN 202002724U
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Abstract
A self-calibrating triaxial vibration monitoring and environment monitoring acquisition device comprises a vibration monitoring module, a temperature compensation module, an environment monitoring module and a signal conditioning module, wherein the vibration monitoring module comprises a high-precision acceleration sensor, the temperature compensation module is used for self-calibration of output of the vibration monitoring module, the environment monitoring module comprises a temperature sensor, a humidity sensor and an illumination sensor, the signal conditioning module comprises a signal conditioning circuit, an anti-aliasing filter, an analog-digital converter and digital interface output, the vibration monitoring module is connected with the signal conditioning module and used for acquiring vibration signals, and the environment monitoring module is used for acquiring temperature signals, humidity signals and illumination signals. The vibration signals outputted from the sensors are connected to the signal conditioning circuit to be amplified by an analog-digital conversion circuit, and finally the vibration signals pass through the digital interface output for temperature compensation. The self-calibrating triaxial vibration monitoring and environment monitoring acquisition device integrates the various sensors applicable to health monitoring and environment monitoring for infrastructures.
Description
One, technical field:
The utility model relates to the harvester of vibration monitoring and environmental monitoring, is specifically related to a kind of harvester that satisfies the three shaft vibration monitorings that possess self-calibration function and the various environmental parameters monitoring of various application occasions.
Two, background technology:
In recent years, along with the input of country to infrastructure construction, a large amount of great infrastructure, as bridge, buildings, tunnel etc. have been played the part of very important role in people's daily life.But, because environmental attack, material aging and long-term load action, the health status of these facilities causes people's worry equally.In order to guarantee the safety of the people's lies and property, the effective means of completed these infrastructure urgent need employings are judged its health status and are in time made a response.Traditional single sensor-based system only considers to gather the dependency structure characterisitic parameter, do not give corresponding consideration to the environment around the works, to not giving corresponding processing because environment (temperature etc.) changes the data output bias that causes, existing 3-axis acceleration sensor is metal or semiconductor material structures, the material of sensor and structure are subjected to the influence of environment temperature bigger, and corresponding output also can depart to some extent.The existing measurement monitoring system scope of application is little, bulky, and measuring accuracy is low, and measurement parameter is few, is not easy to expansion, and these characteristics cause it can not satisfy the monitoring structural health conditions demand of modern great infrastructure.
Three, utility model content:
It is a kind of applied widely that the purpose of this utility model is to provide, and measuring accuracy is high satisfies vibration monitoring and method of environmental monitoring and multi-functional harvester, and system carries high precision 3-axis acceleration sensor and data output and do not vary with temperature and produce drift.System leaves and can expand the simulation input interface, is applied to multiple field convenient future; In addition, the temperature that system carries, humidity, the illuminance monitoring not only can be applied to the environmental monitoring of works, can also be widely used in the environmental monitoring of other field.
The purpose of this utility model is achieved in that self calibration three shaft vibration monitorings and environmental monitoring harvester, by one group of vibration monitoring module, and temperature compensation module, environment monitoring module and signal condition module are formed; Described vibration monitoring module comprises the high precision acceleration transducer; Described temperature compensation module is used for the output of self calibration vibration monitoring module; Described environment monitoring module comprises temperature sensor, humidity sensor, illuminance sensor; Described signal condition module comprises signal conditioning circuit, frequency overlapped-resistable filter, analog to digital converter and digital interface output; The vibration monitoring module connects the signal condition module, and the vibration monitoring module is gathered vibration signal, environment monitoring module collecting temperature signal, moisture signal and illuminance signal; The vibration signal of sensor output connects signal conditioning circuit and amplifies and connect anti-aliasing filter, analog to digital conversion circuit, export by digital interface at last, before digital interface output, vibration signal is according to the temperature signal and the corresponding temperature compensation of temperature compensation module quilt of output; Temperature signal, moisture signal, the illuminance signal can be exported by digital interface after the analog to digital conversion through the amplification of self module.
Acceleration module provides the acceleration analysis of three directions (3-axis acceleration sensor).
Because the sensitive element of acceleration transducer adopts metal or semiconductor material mostly in the vibration monitoring module, its static characteristics and environment temperature have close getting in touch.Under most of condition, acceleration transducer can be because operating ambient temperature changes its static characteristics of cause influence greatly, therefore its output valve also can produce than large deviation, therefore here except being furnished with the vibration monitoring module, also having disposed temperature compensation module and has been used for the output of self calibration system.Environment monitoring module not only can be used for the environmental monitoring of works, can also expand to the environmental monitoring of other field.Vibration module and environment monitoring module are the most at last through the output of signal condition module.
The integrated multiple sensor that is applicable to infrastructure architecture health monitoring and environmental monitoring of the utility model, wherein acceleration transducer can be used for gathering the three-dimensional vibrating signal of facility, analyze the structural health conditions of facility, its monitoring range satisfies low frequency and dither simultaneously.Environmental monitoring can be gathered the works environment temperature simultaneously, humidity, and parameters such as illuminance also can satisfy the environmental monitoring of other field in addition.
Vibration module provides three shaft vibration monitoring functions, and output signal is a simulating signal.Vibration module is mainly used in bridge, tunnel, the monitoring structural health conditions of great infrastructure such as buildings.By gathering the vibration signal of these facility critical areas, analyze its vibration frequency, can judge its health status of living in then.
Environment monitoring module inside provides analog-digital conversion function, and output signal is a digital signal.Environmental monitoring comprises temperature, humidity and illuminance monitoring.Environmental monitoring not only can also be used to obtain the environmental information of other field as gathering works environmental information on every side.
Temperature compensation module is the output variable quantity and the ratio that causes the temperature variation that this output quantity changes according to acceleration transducer, sets up corresponding mathematics model and carries out data calibration.The temperature sensor that the variation of temperature amount is obtained by environment monitoring module provides, and data calibration is finished by processor.
The signal condition module provides the simulating signal of some passages to insert, and signal can arrive frequency overlapped-resistable filter through after amplifying, and carries out analog to digital conversion through high-precision analog to digital converter at last, and data are exported by digital interface at last.The signal condition module also provides can expand the simulation input interface, the convenient application extension of various occasions in the future.
Self calibration three shaft vibration monitorings and method of environmental monitoring are:
Utilize temperature sensor calibrating acceleration output valve, at first obtain the output variable quantity and the ratio S that causes the temperature variation that this output quantity changes of acceleration transducer
TIf one time process is gathered N data, at first set a reference value, comprising acceleration reference value a
0With temperature reference value T
0, a
0The mean value of the individual acceleration information of M (as 100) before can getting in the current gatherer process, T
0The mean value of the individual Temperature numerical of M (as 100) before getting in the current gatherer process.Obtain accekeration a sometime then
i, obtain this correspondence temperature value T constantly simultaneously
i, the output variable quantity of acceleration transducer and cause the ratio S of the temperature variation that this output quantity changes so
TFor:
Wherein, a
iBe i acceleration value, T
iBe i Temperature numerical, the acceleration number of N for gathering,
Then, according to the S that obtains
TThe calibrating acceleration output valve realizes the automatic compensation of temperature.
The beneficial effects of the utility model are:
1, system has multi-functional harvester, comprises three shaft vibrations, temperature, and humidity, illuminance can be applied to different occasions simultaneously, comprises the monitoring structural health conditions of great infrastructure, fields such as environmental monitoring.
2, signal conditioner provides amplifier, frequency overlapped-resistable filter, and a series of signal processing capacities such as analog to digital converter satisfy system's microminiature, integrated function.
3, system's in-system programming is realized multiple sampling rate and cutoff frequency, therefore can corresponding parameter be set according to the different vibration frequencies of institute's monitoring target, satisfies the demand of different occasions, the extendability height.
4, system can realize self-calibration function, effectively suppresses the data-bias of vibration signal, need not back-end data and handles.
5, the system applies occasion is extremely extensive, can adapt to different wired, radio communication platform; System also provides and can expand the simulation input interface in addition, for later expanded application is provided convenience.
Four, description of drawings:
Fig. 1 is system works flow process figure of the present utility model;
Fig. 2 is the utility model system architecture figure
Fig. 3 is a system temperature compensation process flow diagram;
Fig. 4 is a system signal conditioner system assumption diagram;
Five, embodiment:
Below in conjunction with accompanying drawing and instantiation the utility model is done to elaborate, but the native system range of application is not limited thereto example.
In conjunction with Fig. 1 and Fig. 2, system acquisition vibration signal, temperature signal, moisture signal, illuminance signal; Wherein vibration signal can amplify by signal conditioner, anti-aliasing filter, and analog to digital conversion, at last by digital interface (this example is used the SPI interface) output, before output, vibration signal also can carry out corresponding temperature compensation according to the temperature signal of output; Temperature signal, moisture signal, the illuminance signal can be exported by digital interface (this example is used the IIC interface) after the analog to digital conversion through the amplification of self module.The acceleration module of system provides the acceleration analysis of three directions (3-axis acceleration sensor), and scope is-and 2g is to+2g, and measuring accuracy can reach 0.66V/g.Dither not only can be measured by system, and for the low-frequency vibration of works such as picture bridge, system also can well satisfy.Signal conditioner amplifies, and anti-aliasing filter, analog to digital conversion circuit all are custom circuits.
In conjunction with Fig. 3, system is used for obtaining the vibration signal except having disposed 3-axis acceleration sensor, has also disposed temperature sensor.On the one hand, temperature sensor can be used for obtaining the environment temperature of monitored area; On the other hand, can be used for the output valve of calibrating acceleration sensor.Because the sensitive element of acceleration transducer adopts metal or semiconductor material mostly, its static characteristics and environment temperature have close getting in touch.Under some environment, acceleration transducer can be because operating ambient temperature changes its static characteristics of cause influence greatly, and therefore its output valve also can produce than large deviation.Therefore, in order to obtain measured value accurately, must take measures promptly must carry out temperature compensation to reduce or eliminate the influence that temperature variation is brought.
In order to utilize temperature sensor calibrating acceleration output valve, at first need to obtain the output variable quantity and the ratio S that causes the temperature variation that this output quantity changes of acceleration transducer
TSuppose N data of a process collection, at first set a reference value, comprising acceleration a
0And temperature T
0, a
0Can get the mean value of preceding 100 acceleration informations in the current gatherer process, T
0Get the mean value of preceding 100 Temperature numerical in the current gatherer process.Obtain accekeration a sometime then
i, obtain this correspondence temperature value T constantly simultaneously
i, the output variable quantity of acceleration transducer and cause the ratio S of the temperature variation that this output quantity changes so
TFor:
Wherein, a
iBe i acceleration value, T
iBe i Temperature numerical, the acceleration number of N for gathering,
Then, according to the S that obtains
TSet up corresponding mathematics model, the calibrating acceleration output valve realizes the automatic compensation of temperature.
In conjunction with Fig. 4, this routine signal condition module provides four analog input interfaces, before each the collection, can set the interface that to open, in the utility model, because vibration signals collecting X, Y, therefore the data of three directions of Z can open corresponding three interfaces.After setting Active Interface, then can set the enlargement factor of programmable amplifier, then according to different applications, the sampling rate of setting sensor and corresponding cutoff frequency, final data are exported after through 16 analog to digital conversion.This example adopts self calibration vibration monitoring and environmental monitoring harvester, mainly finishes infrastructure architecture health monitoring and environmental monitoring.In application, cooperate wired, radio communication platform, mount the system to the monitored area, the variation by the monitoring facilities agent structure comes evaluation facility health status.
Claims (2)
1. self calibration three shaft vibration monitorings and environmental monitoring harvester is characterized in that by the vibration monitoring module, temperature compensation module, and environment monitoring module and signal condition module are formed; Described vibration monitoring module comprises the high precision acceleration transducer; Described temperature compensation module is used for the output of self calibration vibration monitoring module; Described environment monitoring module comprises temperature sensor, humidity sensor, illuminance sensor; Described signal condition module comprises signal conditioning circuit, frequency overlapped-resistable filter, analog to digital converter and digital interface output; The vibration monitoring module connects the signal condition module, and the vibration monitoring module is gathered vibration signal, environment monitoring module collecting temperature signal, moisture signal and illuminance signal; The vibration signal of sensor output connects signal conditioning circuit and amplifies and connect anti-aliasing filter, analog to digital conversion circuit, export by digital interface at last, before digital interface output, vibration signal is according to the temperature signal and the corresponding temperature compensation of temperature compensation module quilt of output; Temperature signal, moisture signal, the illuminance signal can be exported by digital interface after the analog to digital conversion through the amplification of self module.
2. self calibration three shaft vibration monitorings according to claim 1 and environmental monitoring harvester is characterized in that acceleration module provides the acceleration transducer of three directions.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102032943A (en) * | 2010-12-15 | 2011-04-27 | 常州赛杰电子信息有限公司 | Self-calibrated three-shaft vibration monitoring and environment monitoring acquisition system |
| CN104090127A (en) * | 2014-07-14 | 2014-10-08 | 上海移为通信技术有限公司 | Three-axis self-calibrating method for vehicle-mounted acceleration sensor |
| CN104316168A (en) * | 2014-11-19 | 2015-01-28 | 中国人民解放军总参谋部工程兵科研三所 | Self-calibration networking type wireless vibration tester |
| CN113607265A (en) * | 2021-07-02 | 2021-11-05 | 靖江市中诺仪器仪表有限公司 | Vibration meter with easy-to-adjust accuracy |
-
2010
- 2010-12-15 CN CN2010206608855U patent/CN202002724U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102032943A (en) * | 2010-12-15 | 2011-04-27 | 常州赛杰电子信息有限公司 | Self-calibrated three-shaft vibration monitoring and environment monitoring acquisition system |
| CN104090127A (en) * | 2014-07-14 | 2014-10-08 | 上海移为通信技术有限公司 | Three-axis self-calibrating method for vehicle-mounted acceleration sensor |
| CN104090127B (en) * | 2014-07-14 | 2016-08-24 | 上海移为通信技术股份有限公司 | A kind of three axle method for self-calibrating of vehicle-mounted acceleration sensor |
| CN104316168A (en) * | 2014-11-19 | 2015-01-28 | 中国人民解放军总参谋部工程兵科研三所 | Self-calibration networking type wireless vibration tester |
| CN104316168B (en) * | 2014-11-19 | 2018-01-05 | 中国人民解放军总参谋部工程兵科研三所 | Can self-alignment networking type wireless vibration tester |
| CN113607265A (en) * | 2021-07-02 | 2021-11-05 | 靖江市中诺仪器仪表有限公司 | Vibration meter with easy-to-adjust accuracy |
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Granted publication date: 20111005 Termination date: 20121215 |