CN205538062U - Magnetic flux suo li detection device based on MEMS acceleration sensor revises - Google Patents
Magnetic flux suo li detection device based on MEMS acceleration sensor revises Download PDFInfo
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- CN205538062U CN205538062U CN201521130192.4U CN201521130192U CN205538062U CN 205538062 U CN205538062 U CN 205538062U CN 201521130192 U CN201521130192 U CN 201521130192U CN 205538062 U CN205538062 U CN 205538062U
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- 230000004907 flux Effects 0.000 title claims abstract description 55
- 230000001133 acceleration Effects 0.000 title claims abstract description 42
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- 239000010959 steel Substances 0.000 claims abstract description 26
- 230000006698 induction Effects 0.000 claims abstract description 14
- 238000012937 correction Methods 0.000 claims description 16
- 230000005284 excitation Effects 0.000 claims description 12
- 239000003990 capacitor Substances 0.000 claims description 11
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 230000032683 aging Effects 0.000 abstract description 4
- 238000001914 filtration Methods 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 12
- 238000005259 measurement Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000005070 sampling Methods 0.000 description 4
- 230000035882 stress Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
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- 238000002372 labelling Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
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- 238000012360 testing method Methods 0.000 description 1
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Abstract
The utility model relates to a magnetic flux suo li detection device based on MEMS acceleration sensor revises, it includes MEMS acceleration sensor, exciting coil, induction coil, anti -aliasing filter ware, microcontroller, data disaply moudle etc.. After vibration signal that external drive that MEMS acceleration sensor received the bridge steel cable produced passes through anti -aliasing filter ware filtering aliasing signal, convert data signal to through adc again, carry out the FFT operation through microcontroller at last, finally obtain the characteristic frequency value of bridge steel cable vibration. Field calibration, use cost height and the big scheduling problem of the data processing degree of difficulty need be carried out to the bridge suo li detection device who detects based on magnetic flux at present because of inside electronic components's the ageing data drift that causes to its purpose. A time drift problem has reduced the monitoring cost that has simple structure, makes convenient to use's characteristics magnetic flux suo li detection device, and its needs are built -in MEMS acceleration sensor inside magnetic flow level sensor, and it is the biggest just can to solve present magnetic flux suoli detection device is proposed to improve monitoring validity of data and reliability.
Description
Technical field
This utility model belongs to civil engineering structure security detection equipment field, particularly relates to a kind of based on MEMS acceleration
The magnetic flux cable force detecting device of sensor correction.
Background technology
The Suo Li size of bridge cable directly decides the duty of the guy system bridges such as cable-stayed bridge, suspension bridge, arch bridge,
The change of Suo Li is to weigh whether zip system bridge cable structure is in the important symbol of normal operating condition.Therefore, use
Bridge cable force is detected the necessary means being to ensure that bridge smooth construction and safe operation by method accurately.
At present, the detection of domestic bridge cable force is typically with following several method: oil gauge method, determination of pressure sensor,
Vibratory drilling method (frequency method) etc..But, owing to oil gauge method exists the easy off normal of pointer, during high pressure, pointer shake is big, reading people
For shortcomings such as error are big；Determination of pressure sensor method dynamic response is poor, the problems such as the life-span is short, expensive；Vibratory drilling method is (frequently
Rate method) reliability depend on the installation site of vibration pickup, it is impossible to realize the problems such as round-the-clock detection.
But, occur in that with the mensuration new method as representative of magnetic flux for bridge cable force detection in recent years, and have higher
Future in engineering applications.The principle of bridge cable force magnetic flux detection method is magnetoelastic effect based on ferrimagnet, i.e. works as ferrum
When the external mechanical load that magnetic material bears changes, its internal intensity of magnetization (pcrmeability) changes.In work
In journey practice, i.e. can be used to measure the internal stress of component by testing the pcrmeability change of the component that ferrimagnet is made.
But, be currently based on magnetic flux detection bridge cable force detection measurement device to magnetic flux be a static absolute voltage value,
This magnitude of voltage can be because magnetic flux transducer Inside coil and other electronic devices and components aging As time goes on
Cause data wander.This needs the bridge cable force checking device to detecting based on magnetic flux again to enter by causing in engineering practice
Row field calibration；Meanwhile, this also leads to use cost increases and increases the difficulty that data process.Therefore, this based on magnetic
The bridge cable force checking device of flux detection is applied in engineering and is had some limitations.
Summary of the invention
For deficiency of the prior art, the purpose of this utility model is to provide a kind of based on MEMS acceleration transducer correction
Magnetic flux cable force detecting device.Owing to bridge steel cable can be occurred micro-vibration by crossing the exciting of the factor such as car, strong wind,
This utility model uses and will be built in magnetic flux transducer based on the acceleration transducer of MEMS (micro-electromechanical technology)
Technical solution.The stress spy showing that bridge steel cable is current by measuring bridge steel cable vibration frequecy characteristic to analyze
Property, and the data wander of magnetic flux transducer is revised by this characteristic, thus not only solve magnetic flux transducer inner wire
Circle and other electronic devices and components aging and the data wander problem that causes, also improve stability that bridge cable force measures and can
By property.
Technical solution of the present utility model:
A kind of magnetic flux cable force detecting device based on MEMS acceleration transducer correction, including MEMS acceleration transducer 1,
Temperature sensor 2, excitation coil 3, induction coil 4, boost module 5, IGCT 6, high-voltage capacitor 7, bridge steel
Cable 8, integrator 9, low pass filter 10, analog-digital converter 11, microcontroller 12, frequency overlapped-resistable filter 13, RS485
Interface 14, data disaply moudle 15；
It is characterized in that: the two ends of MEMS acceleration transducer 1 are connected to frequency overlapped-resistable filter 13 two ends, anti-aliasing
Wave filter 13 is connected with microcontroller 12 by RS485 interface 14；The two ends of induction coil 4 are connected on integrator 9 respectively
Two ends, low pass filter 10 is connected between integrator 9 and analog-digital converter 11, and analog-digital converter 11 is connected to low
Between bandpass filter 10 and microcontroller 12；The two ends of excitation coil 3 and high-voltage capacitor 7 are connected in parallel on boost module respectively
5 with on IGCT 6, and IGCT 6 is connected between high-voltage capacitor 7 and boost module 5, and data disaply moudle 15 connects
On microcontroller 12；
MEMS acceleration transducer 1 is detected by the built-in formation magnetic flux Suo Li that is arranged on magnetic flux transducer skeleton of pcb board
Device, the vibration signal that the external drive suffered by bridge steel cable is produced by MEMS acceleration transducer 1 is by anti-aliasing filter
After ripple device 13 filters aliasing signal, then it is converted into digital signal through analog-digital converter 11, eventually passes microcontroller 12
Carry out FFT computing, finally give the characteristic frequency value of bridge steel cable vibration.
Wherein temperature sensor 2 is used for revising the temperature drift of magnetic flux transducer；Excitation coil 3 is by cable force detecting device
The pumping signal sent；Low pass filter 11 is the bandwidth according to magnetic flux transducer output signal and the fixed frequency that sets
Low pass filter, the interference outside filtering signal bandwidth and noise；Frequency overlapped-resistable filter 13 is according to MEMS acceleration
The cable vibration frequecy characteristic of sensor output, according to sampling thheorem, sets the cut-off frequency meeting Sampling Theorem, is used for filtering
Except aliasing signal；IGCT 6 is used as electrical switch, the logical signal of microcontroller 12 control.
Preferably, the direction of described MEMS acceleration transducer 1 is Z axis.
Preferably, described MEMS acceleration transducer 1 and temperature sensor 2 common power supply terminal.
Preferably, described data disaply moudle 15 is touch screen, can show current cable force value, temperature drift value, feature
The data correction value of frequency values and magnetic flux transducer.
Preferably, described induction coil 4 is directly inserted in excitation coil 3, in engineering detecting, by bridge steel cable 8
Being directly anchored on induction coil 4, the induced voltage sensed is drawn bridge steel by integrator 9 computing by induction coil 4
The pcrmeability change that cable causes because of stress, finally gives the changing value of integral voltage.
Preferably, described microcontroller 12 can select 51 series monolithics, it is also possible to selects ARM Series Controller, its
Mainly time-domain signal is carried out FFT computing obtains the characteristic frequency value of bridge steel cable, to MEMS acceleration transducer institute
The rope force value recorded carry out characteristic frequency be calculated magnetic flux transducer data correction value and transfer data to data show
Show module 15.
Relational expression between characteristic frequency value and bridge steel cable is:
T=4ml2fr2/r
(wherein m is unit length Suo Chong, and l is that rope is long, and fr is r rank model frequency)
By analyzing fr, and counter release current force value T, it is possible to revise the measurement force value that magnetic flux transducer is current.
Excitation coil 3 is discharged by high-voltage capacitor 7 by IGCT 6.
Because of vibration measurement is frequency signal, and the time drift produced by component aging is affected is the width of signal
Value, therefore the rope force value measured by MEMS acceleration transducer will not occur data wander because of the time, so this error phase
Data for magnetic flux transducer measurement have the meaning of bench-marking, can repair the measurement data of magnetic flux transducer
Just.Described magnetic flux cable force detecting device based on MEMS acceleration transducer correction, it is characterised in that: induction coil 4
By integrator 9 computing, the induced voltage sensed is shown that the pcrmeability that bridge steel cable causes because of stress changes, finally
Obtain the changing value of integral voltage.
This utility model has simple in construction, manufactures feature easy to use, it is only necessary at magnetic flux transducer internal built-in
Individual MEMS acceleration transducer, it is possible to solve the time drift problem that current magnetic flux cable force detecting device is maximum, reduces
Monitoring cost, and improve the validity and reliability of Monitoring Data.
Accompanying drawing explanation
Fig. 1 is this utility model magnetic flux transducer cut-away view；
Fig. 2 is this utility model magnetic flux acquisition principle block diagram.
In accompanying drawing, the labelling of each parts is as follows: 1, MEMS acceleration transducer；2, temperature sensor；3, excitation coil；
4, induction coil；5 boost modules；6, IGCT；7, high-voltage capacitor；8, bridge steel cable；9, integrator；
10, low pass filter；11, analog-digital converter；12, microcontroller；13, frequency overlapped-resistable filter；14, RS485 interface；
15, data disaply moudle.
Detailed description of the invention
This utility model can be embodied as by disclosed technology, can be carried out this utility model by the following examples
Further description, but, scope of the present utility model is not limited to following embodiment.
Embodiment is as shown in Figure 2: MEMS sensor, in the middle of implementation process, is first fixed on pcb board by this utility model
Upper and built-in be arranged on magnetic flux transducer skeleton, owing to the vibrating shaft direction of MEMS acceleration transducer is wanted and bridge steel
The direction of vibration of cable keeps vertical, so being typically chosen the direction that Z axis is MEMS acceleration transducer.Additionally, due to
MEMS acceleration transducer only need to be powered just can be with direct voltage output signal, so the power supply of MEMS sensor can be with temperature
Degree sensor powers to reduce power supply terminal together.
After cable force detecting device is installed as shown in Figure 2 and made, just bridge steel cable can be carried out Suo Li detection.In engineering
In practice, only the output cord of MEMS acceleration transducer need to be drawn.When detection device is installed with bridge steel cable
After completing, just can start Suo Li detection.First, magnetic flux cable force detecting device utilizes IGCT 6 by boost module 5
Charge until setting voltage value for high-voltage capacitor 7；Then, receive when magnetic flux cable force detecting device microcontroller 12
After acquisition, excitation coil 3 is discharged by high-voltage capacitor 7 by the IGCT 6 being connected with excitation coil 3, with
Time induction coil 4 sense the induced voltage caused because of magnetic flux change；Finally, by magnetic flux cable force detecting device
The integrating circuit in portion and filter filtering conditioning draw the pcrmeability change that bridge steel cable is corresponding under different stressing conditions
And the induced voltage changing value caused.
When needing the data revising the measurement of magnetic flux cable force detecting device magnetic flux transducer, firstly, it is necessary to utilize MEMS
Acceleration transducer is sampled, and the data of sampling obtain one after being processed by frequency overlapped-resistable filter 13 and analog-digital converter 11
The time domain data of group equal interval sampling；Then, and by microcontroller 12, it is carried out FFT computing and obtain current bridge steel
The characteristic frequency value of cable vibration；Finally, magnetic flux transducer is revised by the rope force value corresponding to current signature frequency values
Inductive voltage value.Such as, measuring the bridge steel cable tension value obtained after magnetic flux cable force detecting device is installed for the first time is
T0, the characteristic frequency that now MEMS acceleration transducer records is 5Hz, be can be calculated by T=4ml2fr2/r formula and works as
The pulling force of front axle beam cable is T, the two data is stored as the initial value of detection device, at the beginning of general installation
(T0=T).
But, it is assumed that magnetic flux cable force detecting device, after the use of some months, is surveyed by magnetic flux cable force detecting device
Amount the bridge current value of thrust of wirerope cable be T1, and through MEMS acceleration transducer measurement to value of thrust be Tn, this
Time, just can pass through Tn-T=A, T1-(T0+A)=C, C and be the correction value of magnetic flux transducer, thus can be to surveying every time
It is absolute by value of thrust that value deducts that C i.e. can get suffered by current bridge steel cable, is finally reached the technology effect that Suo Li revises
Really.
The above only have expressed preferred implementation of the present utility model, and it describes more concrete and in detail, but can not be because of
This and be interpreted as the restriction to this utility model the scope of the claims.It should be pointed out that, come for those of ordinary skill in the art
Say, without departing from the concept of the premise utility, it is also possible to making some deformation, improve and substitute, these broadly fall into
Protection domain of the present utility model.Therefore, the protection domain of this utility model patent should be as the criterion with claims.
Claims (7)
1. a magnetic flux cable force detecting device based on MEMS acceleration transducer correction, it is made up of MEMS acceleration transducer (1), temperature sensor (2), excitation coil (3), induction coil (4), boost module (5), IGCT (6), high-voltage capacitor (7), bridge steel cable (8), integrator (9), low pass filter (10), analog-digital converter (11), microcontroller (12), frequency overlapped-resistable filter (13), RS485 interface (14), data disaply moudle (15)；
The two ends of MEMS acceleration transducer (1) are connected to frequency overlapped-resistable filter (13) two ends, and frequency overlapped-resistable filter (13) is connected with microcontroller (12) by RS485 interface (14)；The two ends of induction coil (4) are connected on the two ends of integrator (9) respectively, low pass filter (10) is connected between integrator (9) and analog-digital converter (11), and analog-digital converter (11) is connected between low pass filter (10) and microcontroller (12)；The two ends of excitation coil (3) and high-voltage capacitor (7) are connected in parallel on boost module (5) and IGCT (6) respectively, IGCT (6) is connected between high-voltage capacitor (7) and boost module (5), and data disaply moudle (15) is connected on microcontroller (12)；
It is characterized in that: MEMS acceleration transducer (1) is arranged on magnetic flux transducer skeleton formation magnetic flux cable force detecting device by pcb board is built-in, after the vibration signal that external drive suffered by bridge steel cable is produced by MEMS acceleration transducer (1) filters aliasing signal by frequency overlapped-resistable filter (13), it is converted into digital signal again through analog-digital converter (11), eventually pass microcontroller (12) and carry out FFT computing, finally give the characteristic frequency value of bridge steel cable vibration.
Magnetic flux cable force detecting device based on MEMS acceleration transducer correction the most according to claim 1, it is characterised in that: the direction of MEMS acceleration transducer (1) is Z axis.
Magnetic flux cable force detecting device based on MEMS acceleration transducer correction the most according to claim 1, it is characterised in that: MEMS acceleration transducer (1) and temperature sensor (2) common power supply terminal.
Magnetic flux cable force detecting device based on MEMS acceleration transducer correction the most according to claim 1, it is characterized in that: induction coil (4) is directly inserted in excitation coil (3), in engineering detecting, bridge steel cable (8) is directly anchored on induction coil (4), by integrator (9) computing, the induced voltage sensed is shown that the pcrmeability that bridge steel cable causes because of stress changes by induction coil (4), finally give the changing value of integral voltage.
Magnetic flux cable force detecting device based on MEMS acceleration transducer correction the most according to claim 1, it is characterised in that: microcontroller (12) is 51 series monolithics, or ARM Series Controller.
Magnetic flux cable force detecting device based on MEMS acceleration transducer correction the most according to claim 1 or 5, it is characterized in that: data disaply moudle (15) is touch screen, the data correction value of current cable force value, temperature drift value, characteristic frequency value and magnetic flux transducer can be shown.
Magnetic flux cable force detecting device based on MEMS acceleration transducer correction the most according to claim 1, it is characterised in that: excitation coil (3) is discharged by described high-voltage capacitor (7) by IGCT (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521130192.4U CN205538062U (en) | 2015-12-30 | 2015-12-30 | Magnetic flux suo li detection device based on MEMS acceleration sensor revises |
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| CN201521130192.4U CN205538062U (en) | 2015-12-30 | 2015-12-30 | Magnetic flux suo li detection device based on MEMS acceleration sensor revises |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106768574A (en) * | 2017-03-10 | 2017-05-31 | 哈尔滨开博科技有限公司 | Linear model cable force measurement method after anchor-hold based on magnetic flux method amendment |
| CN114684159A (en) * | 2022-03-21 | 2022-07-01 | 潍柴动力股份有限公司 | Vehicle mass estimation method and device, electronic equipment and storage medium |
| CN118408667A (en) * | 2024-07-03 | 2024-07-30 | 江西飞尚科技有限公司 | Cable force real-time testing method, system, storage medium and computer |
-
2015
- 2015-12-30 CN CN201521130192.4U patent/CN205538062U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106768574A (en) * | 2017-03-10 | 2017-05-31 | 哈尔滨开博科技有限公司 | Linear model cable force measurement method after anchor-hold based on magnetic flux method amendment |
| CN106768574B (en) * | 2017-03-10 | 2019-12-20 | 哈尔滨开博科技有限公司 | Method for measuring cable force of linear model after cable anchoring based on magnetic flux method correction |
| CN114684159A (en) * | 2022-03-21 | 2022-07-01 | 潍柴动力股份有限公司 | Vehicle mass estimation method and device, electronic equipment and storage medium |
| CN118408667A (en) * | 2024-07-03 | 2024-07-30 | 江西飞尚科技有限公司 | Cable force real-time testing method, system, storage medium and computer |
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