CN106123814B - Combined type vibrating wire sensor device for three direction displacement measurements - Google Patents
Combined type vibrating wire sensor device for three direction displacement measurements Download PDFInfo
- Publication number
- CN106123814B CN106123814B CN201610619279.0A CN201610619279A CN106123814B CN 106123814 B CN106123814 B CN 106123814B CN 201610619279 A CN201610619279 A CN 201610619279A CN 106123814 B CN106123814 B CN 106123814B
- Authority
- CN
- China
- Prior art keywords
- frequency
- shaking
- detection
- vibratory string
- sensing head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
- G01B17/04—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring the deformation in a solid, e.g. by vibrating string
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Geophysics And Detection Of Objects (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention discloses a kind of combined type vibrating wire sensor device for being used for three direction displacement measurements, including detection unit, switch and the X-axis vibratory string sensing head, Y-axis vibratory string sensing head, Z axis vibratory string sensing head that are arranged on target internal to be measured, the X-axis vibratory string sensing head, Y-axis vibratory string sensing head, Z axis vibratory string sensing head are in orthogonal three directions, and the detection unit is used for excitation, pick-up and the displacement measurement of vibratory string sensing head；Detection unit control switch is connected with three sensing heads successively according to sequential, obtains the shift value in three directions of target to be measured.Present invention also offers a kind of low-power consumption vibrating string type sensor encourage detection mode, in structure is realized the measurement of Omnibearing-displacement at the same time, greatly save energy consumption, meet work long hours requirement of the sensor under the conditions of unattended, battery powered.
Description
Technical field
The invention belongs to structure measurement field, and in particular to the displacement or deformation of a kind of building field large structure are surveyed
Amount.
Background technology
In the routine servicing of large structure, the deformation or displacement measurement to its critical component are particularly significant, it is above-mentioned by
The stress size and changes in distribution of power component most directly reflect the health status of structure, therefore to the force-bearing situation of these components
Monitor and safety analysis assessment on this basis is of great significance.
Vibrating string type sensor is that its sensing element is one at present in one of dynamometry application aspect sensor the most advanced
Metal silk string, it is connected fixation with force acting on transducer component, utilizes the external tension suffered by the natural frequency of vibration and string wire of string wire
Relational expression measures various physical quantitys, and this sensor output is frequency signal, therefore its strong antijamming capability, temperature drift, drift
It is small, influenced by electrical parameter it is small, it is stable and reliable for performance, long-term observation and Distance Test under mal-condition are adapted to, so wide
Generally in the monitoring of the ess-strain of the engineerings such as reservoir dam, port engineering, bridge, foundation pit, deformation, seepage flow, liquid level etc..
Due to the displacement in three directions involved in the displacement measurement of structure, and vibrating wire sensor can only be obtained along chord line
Displacement, can not realize the comprehensive monitoring of structure；In addition current vibrating string type sensor excitation principal low-pressure scanning frequency excitation mode is low
Pressure scanning frequency excitation is to select suitable frequency band according to the intrinsic frequency of sensor, and the frequency for applying 5V to sensor becomes larger
Scanning frequency pulse string signal, when the frequency of accumulation signal and the close intrinsic frequency of string wire, string wire can be rapidly achieved resonance shape
State, amplitude is maximum under resonance state, can produce larger induced electromotive force, the frequency signal noise that sensor exports it is higher and
Easy to measure.
But since swept-frequency signal is the continuous impulse signal from lower-frequency limit to upper frequency limit, in order to ensure that exciting is imitated
Fruit, the pulse of each frequency will continue several cycles, and the exciting time is too long, causes energy consumption big, limits the sensor and exists
Application in long-range unattended measuring system, in order to improve the wear life of battery, saves energy consumption, it is necessary to which type vibration wire is passed
The electric excitation mode of sensor is improved.
The content of the invention
It is an object of the invention to propose a kind of sensor device of three direction displacements inside measurable fabric structure,
And belong to gradual characteristic using building displacement and deformation, the survey of three direction displacements is realized using same set of detection unit
Amount, while vibratory string excitation and the detection method of a kind of low-power consumption are proposed, by the optimization design to energisation mode, realize low
Power consumption, the measurement of high-precision Displacement-deformation.
The present invention concrete technical scheme be：
For the combined type vibrating wire sensor device of three direction displacement measurements, including detection unit, switch and setting
In the X-axis vibratory string sensing head, Y-axis vibratory string sensing head, Z axis vibratory string sensing head of target internal to be measured, X-axis vibratory string sensing
Head, Y-axis vibratory string sensing head, Z axis vibratory string sensing head are in orthogonal three directions, and each vibratory string sensing head includes only respectively
Vertical vibratory string, coil and housing；The detection unit is used for excitation, pick-up and the displacement measurement of vibratory string sensing head；Detection is single
Member control switch is connected with three sensing heads successively according to sequential, obtains the shift value in three directions of target to be measured.
Above-mentioned to be used in the combined type vibrating wire sensor device of three direction displacement measurements, detection unit includes exciting circuit
Unit, pick-up circuit unit and processing unit；
The exciting circuit unit provides electric signal by coil for vibratory string starting of oscillation；
The pick-up circuit unit obtains the frequency signal of vibratory string by coil；
The processing unit includes pre- shake module, module of shaking again, frequency detection module, handover module and signal processing mould
Block, the output terminal of the exciting circuit unit and the input terminal of the input terminal for module of shaking in advance, module of shaking again electrically connect, the pick-up
The output terminal of circuit unit and the input terminal of frequency detection module electrically connect, and the output terminal of the pre- module of shaking, module of shaking again are defeated
The output terminal of outlet and frequency detection module is electrically connected with signal processing module respectively；Handover module can according to the sequential of setting,
Control switch connects three sensing heads with detection unit respectively；
The signal processing module record effectively answers vibration frequency signal, while controls the excitation detection stream of sensor
Journey, makes sensor work under stable state and unstable state both of which, and effectively answers resonance frequency value according to record, is calculated down
The driving frequency value of module of shaking again during steady state operating mode output；
The unstable state operating mode according to shaking in advance-pre- detection of shaking-shakes-detecting step that shakes again progress again；Described
Steady state operating mode is according to-the detecting step that shakes again progress of directly shaking again.
Above-mentioned to be used in the combined type vibrating wire sensor device of three direction displacement measurements, detection unit controls X-axis respectively
Vibratory string sensing head, Y-axis vibratory string sensing head, Z axis vibratory string sensing head independently carry out frequency measurement according to following step：
[1] after every sensing head installation and debugging, it is preceding n times detection when, signal processing module control sensor according to pre-
Shake-pre- shake detection-shake again-unstable state pattern the work of detection of shaking again, wherein simple venation of the pumping signal shaken in advance for pulsewidth t1
Electric signal is rushed, the frequency for detection of shaking in advance is Fi, the pumping signal shaken again is frequency of oscillation Fi, pulsewidth t2 electric signal, detection of shaking again
Frequency fiIt is this measurement as a result, wherein n and i are positive integer, i is measurement the time；
[2] i is worked as>During n, sensor according to directly shake again-equilibrium mode of detection of shaking again works, wherein the excitation letter that shakes again
Number pulsewidth be t2, driving frequency FiMeasured according to first n times and obtain the moving average access of frequency values：Fi=(fi-n+ ...
+ fi-2+fi-1)/n, and the frequency measurement for obtaining this time is fi；
[3] if the multiple vibration frequency that detection obtains in step [2] exceeds the working range of sensor, or the signal value that shakes again
It is weak to being difficult to normally detect, then this time measurement is invalid, and sensor according to shaking in advance-detection of shaking in advance-shakes again-detection of shaking again it is non-
Equilibrium mode works, otherwise sensor according to directly shake again-equilibrium mode of detection of shaking again works；
[4] every time after measurement, the frequency values f of this time is recordediCalculating for Subsequent activations signal frequency.
It is above-mentioned to be used in the combined type vibrating wire sensor device of three direction displacement measurements, shake in advance and encourage pulsewidth t1 and shake again
Pulsewidth t2 is encouraged, is obtained according to the calibration experiment to sensor.
It is above-mentioned to be used in the combined type vibrating wire sensor device of three direction displacement measurements, n=10,20 or 50.
Above-mentioned to be used in the combined type vibrating wire sensor device of three direction displacement measurements, the excitation pulsewidth t1 that shakes in advance is 100-
200ms, the excitation pulsewidth t2 that shakes again is 200-500ms.
The advantageous effects that the present invention has are as follows：
First, the present invention is realized to structure by the vibrating wire sensor in three directions of construction inner to be measured setting
Position moves and the comprehensive detection of deformation, at the same using displacement is slowly varying and the characteristics of sensor is relatively time-consuming shorter, use
A set of detection circuit switches to three sets of sensors according to sequential, and cost has been saved while testing requirements are met.
2nd, the present invention provides it is a kind of according to moving average predict measurement frequency low-power consumption vibrating string type sensor,
Vibratory string incentive mode is changed, traditional low pressure scanning frequency excitation mode is changed into the pre- energisation mode for shaking and combining and shaking again,
And frequency values when shaking in advance are detected as the driving pulse frequency shaken again, so as to play energy saving effect.At the same time according to n times first
The calculating of the moving average of measurement result, prediction obtain measurement frequency next time, and when controlling repetition measurement according to the frequency values
Excited oscillation frequency, experience is pre- to shake and the measuring method for two steps of shaking again compared to being required for every time, further functioned as it is energy saving and
Improve the effect of the frequency.
3rd, measurement parameter of the present invention in the displacement of the large structure such as bridge, building and shape changing detection slowly becomes
The characteristics of change so that sensor is operated under two kinds of operating modes of stable state and unstable state, in steady operation, using directly multiple
Shake-shake again detection incentive mode, and the average that the signal to shake again is preceding n practical frequency, there is frequency only under equilibrium mode
Rate measurement result error either because the driving frequency shaken again is improper cause detect signal too it is weak can not normally detect when,
Switch to pre- shake-pre- detection of shaking-shake again-the unstable state pattern of detection of shaking again under work so that be averaged to daily measurement work(
Consumption minimizes, and meets work long hours requirement of the sensor under the conditions of unattended, battery powered, while be also adapted to
The change of the vibratory string frequency occurred because sensor ageing.
4th, during present invention measurement, calibration is measured to sensor, obtains sensor in operating frequency range most
The small pre- excitation pulsewidth t1 and excitation pulsewidth t2 that shakes again that shakes, it is ensured that while sensor can work normally, saved system power dissipation.
5th, either under stable state or unstable state pattern, of the invention answering is shaken being total to of driving pulse frequency and actual string wire
Vibration frequency approaches, it is ensured that the signal obtained during excitation has larger amplitude, greatly improves measurement accuracy.
Brief description of the drawings
Fig. 1 is the principle schematic of conventional vibrating wire sensor.
Fig. 2 is the operation principle schematic diagram of the compound vibrating wire sensor in three directions of the invention.
Fig. 3 is the theory of constitution schematic diagram of low-power consumption vibration wire sensor of the present invention.
Fig. 4 is the excitation testing process of low-power consumption vibration wire sensor of the present invention.
Fig. 5 is the power consumption electric current sequence diagram under unstable state pattern of the present invention.
Fig. 6 is the power consumption electric current sequence diagram under equilibrium mode of the present invention.
In figure：1-vibratory string；2-coil；3-sensor housing；4-exciting circuit unit；5-pick-up circuit unit；
6-processing unit；9-positioning support；10-lead；11-detection unit；12-switch；13-target to be measured；16-X-axis
Vibratory string sensing head；14-Y-axis vibratory string sensing head；15-Z axis vibratory string sensing head.
Embodiment
As shown in Figure 1, vibrating string type sensor belongs to frequency type sensor, can it is equivalent into a both ends frequency with steel wire tension
The vibration string wire of change, including vibratory string 1, coil 2, sensor housing 3 and lead 10, vibratory string 1 are fixed on the two of sensor housing 3
On the positioning support 9 at end, coil 2 is arranged on the middle part of vibratory string 1, and circuit produces pumping signal, and driving coil produces magnetic drive
Vibratory string 1 produces vibration, and detects the vibration of vibratory string 1.
Under electric excitation, vibratory string 1 presses its natural frequency vibration, changes the tension force F of vibratory string 1, can obtain different vibrations
Frequency F, i.e. tension force and resonant frequency are into monotropic function relation.After vibratory string is by tension length changes delta l, then haveWherein ρνFor the volume density of string, E is the elasticity modulus of vibratory string, and l is chord length.
During practical application, when the housing 3 of vibrating string type sensor is subject to dilatation, the positioning support at both ends is driven to produce
It is mobile, so as to cause vibratory string 1 to extend or shrink, by detecting the change of vibratory string frequency, to realize the measurement of displacement and deformation.When
When the frequency of signal and the intrinsic frequency of vibratory string are close, vibratory string 1 is rapidly reached resonance state, vibrates the induced electromotive force of generation
Filtered, amplified by detection circuit, frequency measurement unit is given in shaping.What it is due to its output is frequency signal, has measurement can
Lean on, strong antijamming capability, it is low to cable requirement, be conducive to transmission and long-range the characteristics of measuring.
As shown in Figures 2 and 3, the combined type vibrating wire sensor device for being used for three direction displacement measurements of the invention, bag
Include detection unit 11, switch 12 and the X-axis vibratory string sensing head 16, Y-axis vibratory string sensing head 14, Z that are arranged on target internal to be measured
Axis vibratory string sensing head 15, the X-axis vibratory string sensing head 16, Y-axis vibratory string sensing head 14, Z axis vibratory string sensing head 15 are in mutual
Three vertical directions, each vibratory string sensing head include independent vibratory string 1, coil 2 and housing 3 respectively；The detection unit
11 are used for excitation, pick-up and the displacement measurement of vibratory string sensing head；Detection unit 11 controls switch 12 according to sequential successively with three
A sensing head is connected, and obtains the shift value in three directions of target to be measured.Switch 12 can use solid-state relay or other devices
Part forms, and under the control of detection unit 11, is switched over according to the sequential of setting, detection unit 11 includes exciting circuit unit
4th, pick-up circuit unit 5 and processing unit 6.
It is used in vibrating wire sensor in the long term monitoring of field, higher requirement is proposed to the power consumption of sensor, it is existing to shake
The low pressure scanning frequency excitation mode that string type sensor excitation is taken, the voltage pulse signal of generally use 5V, with vibrating wire sensor
Measurable low frequency starts frequency becomes larger, and scans to highest frequency, such as from 200 to 5000Hz, when reaching resonance state
The frequency signal of vibratory string is recorded, and is converted to the displacement of measurement, strain signal.
In order to reduce power consumption, as shown in figure 3, the present invention improves the energisation mode of coil, processing unit includes
Pre- module of shaking, shake module, frequency detection module, handover module and signal processing module again, and signal processing module record is effective
Multiple vibration frequency signal, while the excitation testing process of sensor is controlled, make sensor work under stable state and unstable state both of which
Make, and resonance frequency value, the driving frequency value of module of shaking again when steady state operating mode is calculated output are effectively answered according to record.
Handover module can control switch to connect three sensing heads with detection unit respectively according to the sequential of setting.
The main thought of the present invention is from the point of view of energy saving, and energisation mode is divided into two kinds of moulds of stable state and unstable state
The operating mode of formula, wherein unstable state according to shaking in advance, and the step of detecting is shaken-shaken again to-pre- detection of shaking-to carry out again, stable state work
Operation mode is according to-the detecting step that shakes again progress of directly shaking again.
In unstable state operating mode, coil has been carried out first it is pre- shake, by processing unit 6 control it is pre- shake module output one
A pulsewidth be t1 single pulse signal to exciting circuit unit 4, the signal promote coil by vibratory string attract deviate equilbrium position, open
Beginning shakes in advance, after shaking initial delay in advance for a period of time, frequency detection module by pick-up circuit unit 5 to the vibratory string frequency shaken in advance into
Row detection, obtains pre- vibration frequency, and then processing unit control shakes module one frequency of oscillation of output equal to pre- vibration frequency, pulsewidth again
The electric signal of t2 to exciting circuit unit, initial delay of shaking again for a period of time after, frequency detection module passes through pick-up circuit unit
The vibratory string frequency shaken again is detected, obtains this measurement frequency, displacement or deformation parameter is converted into and obtains this
Secondary measurement result.Due to having been obtained for a rough frequency by the processing unit of the detection to pre- vibration frequency, sensor
Value, then excitation of shaking is answered close to frequency by similar, it may be such that string wire produces resonance quickly, and tool is readily available during shaking again
There is the signal of higher magnitude, beneficial to the counting of frequency, and then improve measurement accuracy.
Although the above-mentioned pre- mode being combined of shaking and shake again is reduced at energy saving aspect than traditional scanning frequency excitation mode energy consumption
It is many, but if every time detection when will be shaken in advance excitation, and the t1 for excitation of shaking in advance is usually hundred ms grades, therefore understands band
Carry out larger power consumption.From the angle of practical implementation, it is contemplated that most time inner sensors are to be operated in one relatively
In the environment of stable state, and the cycle of Sensor monitoring is second level, for conventional large-sized structural parts, for example is pacified on bridge
Dress vibrating wire sensor is detected with load, is overloaded under normal conditions in the relatively long time in units of hour inviolent
Change, i.e. the change in displacement of sensor is little, that is to say, that the frequency values of actual measurement can approach in a period of time under limit,
Therefore pre- the step of encouraging of shaking can be saved under limit completely, the detection that shakes-shake again again is directly entered, is handled when shaking again
Unit control is shaken module output pulse width t2, frequency of oscillation and electric signal that above practical frequency is close to exciting circuit list again
Member, it is possible to realize that string wire resonates, obtain displacement and deformation parameter.
As shown in figure 4, take into account the requirement of stable state and unstable state work, sensor excitation detection method, according to following step
It is rapid to carry out：
[1] the data accumulation stage：After sensor installation and debugging, it is preceding n times detection when, signal processing module control sensing
Device according to shaking in advance-pre- detection of shaking-shakes again-the unstable state pattern work of detection of shaking again, wherein the pumping signal shaken in advance is pulsewidth
The pulse electric signal of t1, the frequency for detection of shaking in advance is Fi, the pumping signal shaken again is frequency of oscillation Fi, pulsewidth t2 electric signal,
Detection frequency of shaking again fiIt is this measurement as a result, wherein n and i are positive integer, i is measurement the time；
[2] measurement under normal circumstances：Work as i>During n, sensor is according to-equilibrium mode the work of detection of shaking again of directly shaking again
Make, wherein the pulsewidth for pumping signal of shaking again is t2, driving frequency FiThe moving average for obtaining frequency values according to first n times measurement takes
Number：Fi=(fi-n+ ...+fi-2+fi-1)/n, and the frequency measurement for obtaining this time is fi；
[3] processing under abnormal condition：If the multiple vibration frequency that detection obtains in step [2] exceeds the work of sensor
Scope, or the signal value that shakes again are weak to being difficult to normally detect, then this time measurement is invalid, and sensor is according to-detection of shaking in advance-of shaking in advance
Shake again-unstable state the pattern of detection of shaking again work, otherwise sensor is according to-equilibrium mode the work of detection of shaking again of directly shaking again
Make；
[4] data are provided for measurement next time：Every time after measurement, the frequency values f of this time is recordediFor follow-up
Encourage the calculating of signal frequency.
For conventional large-sized structural parts, normal conditions lower sensor uses the operating mode of stable state, is only going out
Under existing emergency case, shake again the frequency number excitation using arithmetic rolling average when there is measurement result and exceed the specified frequency of sensor
Rate scope is either mismatched because of the driving frequency and the resonant frequency of string wire shaken again, leads to not resonate so that detection signal
It is too weak just to switch to unstable state operating mode when normally detect, once after the instantaneous unstable state stage, since arithmetic moves
The smoothing effect of dynamic average, automatically switches to the pattern of directly shaking again of stable state again quickly.It facts have proved that n takes 10,20 or 50 i.e.
It can meet measurement request, and there is preferable energy-saving effect.
As a kind of preferred embodiment, the present invention measures sensor calibration when measuring, obtains sensor and working
The minimum pre- excitation pulsewidth t1 and excitation pulsewidth t2 that shakes again that shakes in frequency range, it is ensured that sensor can work normally same
When, save system power dissipation.
Fig. 5 and Fig. 6 sets forth the current drain sequence diagram under both of which, wherein excitation pulsewidth t1 values of shaking in advance are
100-200ms, excitation pulsewidth t2 values of shaking again are 200-500ms, and sampling processing of shaking in advance and sampling processing stage of shaking again are also because of AD
The consumption portion of energy such as conversion, standby phase shake and then energy consumption minimizes the stage of shaking again compared to pre-, wherein standby duration by
The temporal resolution of measurement sensor determines, is usually second level.
The present invention greatlys save energy consumption compared to low pressure scanning frequency excitation mode, meets sensor in unattended, battery
The requirement that works long hours under condition of power supply, and realize the measurement of Omnibearing-displacement in structure.
Claims (4)
1. the combined type vibrating wire sensor device for three direction displacement measurements, it is characterised in that：Including detection unit, switching
Device and the X-axis vibratory string sensing head, Y-axis vibratory string sensing head, Z axis vibratory string sensing head for being arranged on target internal to be measured, the X-axis are shaken
String sensing head, Y-axis vibratory string sensing head, Z axis vibratory string sensing head are in orthogonal three directions, each vibratory string sensing head difference
Including independent vibratory string, coil and housing；
The detection unit is used for excitation, pick-up and the displacement measurement of vibratory string sensing head；Detection unit control switch according to
Sequential is connected with three sensing heads successively, obtains the shift value in three directions of target to be measured；
The detection unit includes exciting circuit unit, pick-up circuit unit and processing unit；The exciting circuit unit
By coil electric signal is provided for vibratory string starting of oscillation；The pick-up circuit unit obtains the frequency signal of vibratory string by coil；
The processing unit includes pre- module of shaking, shake module, frequency detection module, handover module and signal processing module again,
The output terminal of the exciting circuit unit and the input terminal of the input terminal for module of shaking in advance, module of shaking again electrically connect, the pick-up electricity
The output terminal of road unit and the input terminal of frequency detection module electrically connect, the output terminal of the pre- module of shaking, module of shaking again output
The output terminal of end and frequency detection module is electrically connected with signal processing module respectively；Handover module can be controlled according to the sequential of setting
Switch processed connects three sensing heads with detection unit respectively；
The signal processing module record effectively answers vibration frequency signal, while controls the excitation testing process of sensor, makes
Sensor works under stable state and unstable state both of which；The unstable state operating mode is multiple according to-detection of shaking in advance-of shaking in advance
Shake-detecting step that shakes again carry out；The steady state operating mode is according to-the detecting step that shakes again progress of directly shaking again；
The detection unit controls X-axis vibratory string sensing head, Y-axis vibratory string sensing head, Z axis vibratory string sensing head according to following respectively
Step independently carries out frequency measurement：
[1] after sensing head installation and debugging, during preceding n detection, signal processing module controls sensor according to shaking-shake in advance in advance
Detect-shake again-unstable state the pattern of detection of shaking again work, wherein the pumping signal shaken in advance is the pulse telecommunications of pulsewidth t1
Number, the frequency for detection of shaking in advance is Fi, the pumping signal shaken again is frequency of oscillation Fi, pulsewidth t2 electric signal, shake detection frequency f againi
It is this measurement as a result, wherein n and i are positive integer, i is measurement the time；
[2] i is worked as>During n, sensor according to directly shake again-equilibrium mode of detection of shaking again works, wherein pumping signal of shaking again
Pulsewidth is t2, driving frequency FiMeasured according to first n times and obtain the moving average access of frequency values：Fi=(fi-n+……+fi-2+
fi-1)/n, and the frequency measurement for obtaining this time is fi；
[3] if detecting the working range that obtained multiple vibration frequency exceeds sensor in step [2], or the signal value that shakes again is weak extremely
It is difficult to normally detect, then this time measurement is invalid, and sensor according to shaking in advance-detection of shaking in advance-to shake again-the unstable state of detection of shaking again
Pattern works, otherwise sensor according to directly shake again-equilibrium mode of detection of shaking again works；
[4] every time after measurement, the frequency values f of this time is recordediCalculating for Subsequent activations signal frequency.
2. the combined type vibrating wire sensor device according to claim 1 for being used for three direction displacement measurements, its feature exist
In：The pre- excitation pulsewidth t1 and excitation pulsewidth t2 that shakes again that shakes, obtains according to the calibration experiment to sensor.
3. the combined type vibrating wire sensor device according to claim 1 for being used for three direction displacement measurements, its feature exist
In：N=10,20 or 50.
4. the combined type vibrating wire sensor device according to claim 1 for being used for three direction displacement measurements, its feature exist
In：The pre- excitation pulsewidth t1 that shakes is 100-200ms, and the excitation pulsewidth t2 that shakes again is 200-500ms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610619279.0A CN106123814B (en) | 2016-08-01 | 2016-08-01 | Combined type vibrating wire sensor device for three direction displacement measurements |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610619279.0A CN106123814B (en) | 2016-08-01 | 2016-08-01 | Combined type vibrating wire sensor device for three direction displacement measurements |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106123814A CN106123814A (en) | 2016-11-16 |
| CN106123814B true CN106123814B (en) | 2018-04-13 |
Family
ID=57255453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610619279.0A Active CN106123814B (en) | 2016-08-01 | 2016-08-01 | Combined type vibrating wire sensor device for three direction displacement measurements |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106123814B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110614856B (en) * | 2019-09-04 | 2021-05-25 | 广州洛图终端技术有限公司 | Printing medium detection device and method and printer |
| CN111764944A (en) * | 2020-06-12 | 2020-10-13 | 中国水利水电科学研究院 | Three-dimensional reinforcing bar meter suitable for monitoring stress of fracture hard rock support anchor rod (reinforcing bar) |
| CN112945426B (en) | 2021-01-29 | 2022-02-01 | 西南石油大学 | Vibrating wire sensor and stress displacement testing method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2087877C1 (en) * | 1992-07-30 | 1997-08-20 | Анатолий Гиршевич Левелев | Method measuring oscillation frequency of vibrating wire transducer |
| CN201368786Y (en) * | 2009-03-17 | 2009-12-23 | 北京科技大学 | Three-dimensional vibrating wire pressure sensor |
| CN101571407B (en) * | 2009-06-19 | 2010-11-10 | 中国水利水电科学研究院 | Excitation method of vibrating wire sensor |
| CN203053474U (en) * | 2012-11-23 | 2013-07-10 | 国网电力科学研究院 | Vibrating wire sensor adapter compatible with SDI-12 protocol |
| CN205027378U (en) * | 2015-09-29 | 2016-02-10 | 南京南瑞集团公司 | Multichannel vibration wire formula sensor data collection module |
-
2016
- 2016-08-01 CN CN201610619279.0A patent/CN106123814B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN106123814A (en) | 2016-11-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106289034B (en) | A kind of low-power consumption vibration wire sensor and its excitation detection method | |
| CN106225656B (en) | The excitation detection device and excitation detection method of a kind of low-power consumption vibration wire sensor | |
| CN106123814B (en) | Combined type vibrating wire sensor device for three direction displacement measurements | |
| CN101571407B (en) | Excitation method of vibrating wire sensor | |
| CN101320081B (en) | Micro electro-mechanical system magnetic field sensor and measuring method | |
| CN107710022A (en) | Seismaesthesia sensor and earthquake determination methods | |
| US5425623A (en) | Rod pump beam position determination from motor power | |
| CN103308263B (en) | Large-sized structural parts mould measurement exciting bank | |
| CN108051074B (en) | A kind of frequency measurement method of vibrating string type sensor | |
| CN202928732U (en) | Prestressed concrete bridge absolute stress monitoring device | |
| CN210774457U (en) | Real-time monitoring device for cable force variation of arch bridge suspender | |
| CN107966223A (en) | A kind of vibrating wire sensor exciting optimization method and vibratory string harvester | |
| CN102147283B (en) | Embedded self-energy supply wireless monitoring device of rotor equipment | |
| CN103728060A (en) | Steel cable prestress magnetic flux impulse measurement method | |
| CN102169143A (en) | Vibration shielding type electric field sensor | |
| CN104198095A (en) | Concrete beam prestress value and prestress loss monitoring method | |
| CN206019711U (en) | A kind of wireless vibratory string acquisition system of synchronized sampling | |
| CN104278984A (en) | Micrometric displacement indicator for beam pumper | |
| CN105277617A (en) | Piezoelectric vibration sensor | |
| CN109570137B (en) | Ultrasonic descaling device with self-diagnosis function | |
| CN209393660U (en) | A kind of ultrasound wave descaling device with self-diagnostic function | |
| CN202041589U (en) | Vibration shielded electric field sensor | |
| CN101275858B (en) | Micro-angular displacement sensor for detecting steel structure elastic angle and measuring method thereof | |
| CN103017889A (en) | Sensor, method for same and engineering machine containing same | |
| CN208075767U (en) | A kind of circuit structure for detecting human body back curve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |