CN206496757U - A kind of sensor-based inclination measurement device - Google Patents
A kind of sensor-based inclination measurement device Download PDFInfo
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- CN206496757U CN206496757U CN201621459756.3U CN201621459756U CN206496757U CN 206496757 U CN206496757 U CN 206496757U CN 201621459756 U CN201621459756 U CN 201621459756U CN 206496757 U CN206496757 U CN 206496757U
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Abstract
The utility model is related to a kind of sensor-based inclination measurement device, the utility model is the new inclination measurement device designed based on LVDT sensors or vibrating string type sensor, and the location status of sliding block is sensed so as to the device measured to inclination by LVDT sensors or vibrating string type sensor.Four sensors are provided with the device, four sides of sliding block is respectively arranged in, is connected between sensor and sliding block by metal tie rods；Sliding block is connected by spring with shell body.Long term monitoring of the utility model due to the advantages of LVDT sensors or vibrating wire sensor self structure are simple, stability is high, being widely used in civil structure safety.LVDT sensors or vibrating wire sensor production is simple, manufacturing process difficulty is small, therefore the design inclination measurement device can solve the problem of traditional MEMS obliquity sensor manufacture difficulty is big, simultaneity factor stability is high.
Description
Technical field
The utility model is related to a kind of sensor-based inclination measurement device, and the utility model is based on LVDT sensors or shaken
String type sensor and the new inclination measurement device designed, pass through LVDT sensors or vibrating string type sensor senses the location status of sliding block
So as to the device measured to inclination.
Background technology
At present in fields such as works, building displacement monitorings, horizontal displacement change is an important monitoring object, water
Prosposition, which is moved, to realize measurement by methods such as manual measurement, total powerstation, displacement transducer, inclinometers.The wherein measurement of inclinometer
General principle is：By the change at angle of inclination, pass through the relation calculated level displacement W of trigonometric function=H*Sin (α), wherein H
The height installed for boxlike inclinometer, α is angle of inclination.
Conventional bevel measuring method realizes that works horizontal displacement is measured, people to cause monitoring system to meet industry requirement
Work measurement, total powerstation carry out field monitoring, it is impossible to real-time, round-the-clock automatic measurement.And total powerstation equipment is expensive, maintenance cost compared with
It is high.
At present MEMS is generally in the inclinometer Sensitive Apparatus of monitoring sector application（Micromechanics electronic measurement system）Principle,
Its general principle be by small capacitive grating structure design and chip internal, when inclination angle changes, the capacitance between capacitive grating
Change, voltage is turned by internal electric capacity（C/V is changed）After circuit conversion, magnitude of voltage is obtained.Inclination angle-voltage can be achieved
Output relation.Because its indoor design is accurate, complicated, therefore the typically obliquity sensor of such MEMS principles is in cost, temperature
There is certain deficiency in terms of degree characteristic, long-time stability.
In summary, although the method for conventional bevel test, device are having certain application scenarios, in structure, production
Shortcomings and limitation in terms of technological requirement, stability.
The content of the invention
The utility model purpose is a kind of sensor-based inclination measurement device of offer, and the technical problem of solution is that：
1）Using sensor as sensing element, inclination measurement is carried out by the location means for measuring sliding block, is simplified the structure with realizing
Design, it is easy to produce；2）Low advantage is influenceed using LVDT or vibrating string type sensor self stability, temperature so that device
Stability, temperature characterisitic meet engineering survey requirement.
The utility model to achieve these goals, is adopted the following technical scheme that：
Four sensors are provided with a kind of sensor-based inclination measurement device, the device, the four of sliding block are respectively arranged in
Individual side, is connected between sensor and sliding block by metal tie rods；
Sliding block is connected by spring with shell body.
The type of four sensors is LVDT or vibrating string type sensor.
When sliding block run-off the straight, slide position is changed the drawing produced, compression and is delivered to LVDT sensors by connecting rod
Or vibrating string type sensor.
Sliding block is connected by spring with shell body, and the location status of sliding block can be controlled by spring.
The general work principle of LVDT sensors is：Magnetic metal pull bar is placed in coil magnetic field, linear change difference
Transformer (LVDT) is a kind of general-purpose device for position measurement, inside include a primary coil, two secondary coils with
And a magnetic core that can be moved freely.Due to not contacted between magnetic core and coil, the movement of magnetic core will not be produced with coil to rub
Wipe.Therefore, in some harsh environment, the reliability of device can mechanically be ensured using LVDT.
Linear variable difference transformer (LVDT) is mainly made up of an iron core and two coils, due to fricton-tight contact,
Do not influenceed during work by the nonmetallic factor such as dust, and low in energy consumption, long lifespan.If primary coilL Driving voltage beU1, two
Individual secondary coilL1,L2 induced voltage is respectivelyU21,U22, the mutual inductance of primary coil and two secondary coils is distinguished
ForM1 withM2, ignore the output voltage of magnetic hysteresis vortex and coupled capacitor, then LVDTU21,U22,U2 expression formula such as formula
(1)~formula (3)：
ÛU21 = jωM1ÛI1 (1)
ÛU22 = jωM2ÛI1 (2)
ÛU2 = ÛU21 - ÛU22 = jω(M1 - M2 ) ÛI1 (3)
In formula:I1 is exciting current in main coil;M1 withM2 position in a segment limit of center with iron core
Put linear, then the displacement variable of iron core is in good linear relationship with output voltage variable quantity.
When the non-run-off the straight of device horizontal positioned, four LVDT sensor displacements are averaged.Run-off the straight after device is installed
When, rear slider is tilted due to the influence of acceleration of gravity, and sliding block institute produces pressure to LVDT sensors 1,2 in the horizontal direction, right
3rd, 4 pulling force, thus the displacement reduction of LVDT sensors 1,2, the displacement increase of LVDT sensors 3,4 are produced.In actual production system
When making, the relation of shift value-inclination angle value of LVDT sensors is calculated, according to the weighted average and inclination value of change in displacement
It is fitted.
The general work principle of vibrating string type sensor is：Vibratory string is placed in magnetic field, and certain way is subject to exciting to vibratory string
Afterwards, vibratory string will resonate, and the string of a musical instrument of resonance makees cutting magnetic line movement in magnetic field, can induce electricity in pick-up coil
Gesture, the frequency of induced potential is exactly the resonant frequency of vibratory string.From mechanics principle, what the resonant frequency of vibratory string was born with the string of a musical instrument
Tension force or pulling force and the tension and compression stress intensity that sensor is born are linear.
In device horizontal level, sliding block is by the spacing of spring, in center condition, the tension and compression that four vibrating wire sensors are received
Stress is averaged.After device is installed during run-off the straight, as shown in Fig. 2 tilting rear slider due to the influence of acceleration of gravity, sliding block institute
In the horizontal direction to vibrating wire sensor 1,2 produce compression, to 3,4 produce tensions, thus vibrating wire sensor 1,2 vibratory string from
Reduced by concussion frequency, the vibratory string of vibrating wire sensor 3,4 freely shakes frequency rise.When actual production is manufactured, vibratory string sensing
The relation of frequency values-inclination angle value of device is calculated, and square weighting average value and the inclination value changed according to frequency is fitted.
The original frequency of such as four vibrating string type sensors is f10, f20, f30, f40 respectively, measured value be respectively f11, f21, f31,
F41, angle value is then：k*[（f11-f10）²+（f21-f20）²+（f31-f30）²+（f41-f40）²]/4.Wherein K values are mark
Determine coefficient, demarcating fitting by measured value and actual corners angle value obtains.
The beneficial effects of the utility model：
The utility model make use of LVDT sensors or vibrating wire sensor, sliding block and Aided Machine structure, be passed using LVDT
Sensor or vibrating wire sensor are as sensing element, due to LVDT sensors or vibrating wire sensor self structure is simple, stability is high
The advantages of, it is widely used in the long term monitoring of civil structure safety.LVDT sensors or vibrating wire sensor production are simple, manufacture work
Skill difficulty is small, therefore the design inclination measurement device can solve the problem of traditional MEMS obliquity sensor manufacture difficulty is big, simultaneity factor
Stability is high.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Slide position schematic diagram when Fig. 2 is the utility model run-off the straight.
Embodiment
The utility model is described in detail below in conjunction with the accompanying drawings：
One kind obtains change of pitch angle by the use of LVDT sensors as sensitive measuring element by the change in location for measuring sliding block
Device.Device is designed with four LVDT sensors 1,2,3,4, is respectively arranged in four sides of sliding block 5, both pass through metal
Connecting rod 6 is connected, when sliding block run-off the straight, and drawing that connecting rod 6 produces the change in location of sliding block 5, compression are delivered to LVDT
Sensor 1,2,3,4.
The present apparatus is to obtain tilting value by measuring the tilting gearing of sliding block, therefore the position of sliding block can pass through from sliding block 5
Spring 7 is connected with shell body 8, and the location status of sliding block 5 can be controlled by spring 7.
The general work principle of LVDT sensors is：Magnetic metal pull bar is placed in coil magnetic field, linear change difference
Transformer (LVDT) is a kind of general-purpose device for position measurement, inside include a primary coil, two secondary coils with
And a magnetic core that can be moved freely.Due to not contacted between magnetic core and coil, the movement of magnetic core will not be produced with coil to rub
Wipe.Therefore, in some harsh environment, the reliability of device can mechanically be ensured using LVDT.
Linear variable difference transformer (LVDT) is mainly made up of an iron core and two coils, due to fricton-tight contact,
Do not influenceed during work by the nonmetallic factor such as dust, and low in energy consumption, long lifespan.If primary coilL Driving voltage beU1, two
Individual secondary coilL1,L2 induced voltage is respectivelyU21,U22, the mutual inductance of primary coil and two secondary coils is distinguished
ForM1 withM2, ignore the output voltage of magnetic hysteresis vortex and coupled capacitor, then LVDTU21,U22,U2 expression formula such as formula
(1)~formula (3)：
ÛU21 = jωM1ÛI1 (1)
ÛU22 = jωM2ÛI1 (2)
ÛU2 = ÛU21 - ÛU22 = jω(M1 - M2 ) ÛI1 (3)
In formula:I1 is exciting current in main coil;M1 withM2 position in a segment limit of center with iron core
Put linear, then the displacement variable of iron core is in good linear relationship with output voltage variable quantity.
When the non-run-off the straight of device horizontal positioned, four LVDT sensor displacements are averaged.Run-off the straight after device is installed
When, as shown in Fig. 2 tilting rear slider due to the influence of acceleration of gravity, sliding block institute produces to LVDT sensors 1,2 in the horizontal direction
Raw pressure, pulling force, thus the displacement reduction of LVDT sensors 1,2, the displacement increase of LVDT sensors 3,4 are produced to 3,4.In reality
When border is manufactured, the relation of shift value-inclination angle value of LVDT sensors is calculated, according to the weighted average of change in displacement
It is fitted with inclination value.
The general work principle of vibrating string type sensor is：Vibratory string is placed in magnetic field, and certain way is subject to exciting to vibratory string
Afterwards, vibratory string will resonate, and the string of a musical instrument of resonance makees cutting magnetic line movement in magnetic field, can induce electricity in pick-up coil
Gesture, the frequency of induced potential is exactly the resonant frequency of vibratory string.From mechanics principle, what the resonant frequency of vibratory string was born with the string of a musical instrument
Tension force or pulling force and the tension and compression stress intensity that sensor is born are linear.
In device horizontal level, sliding block is by the spacing of spring, in center condition, the tension and compression that four vibrating wire sensors are received
Stress is averaged.After device is installed during run-off the straight, as shown in Fig. 2 tilting rear slider due to the influence of acceleration of gravity, sliding block institute
In the horizontal direction to vibrating wire sensor 1,2 produce compression, to 3,4 produce tensions, thus vibrating wire sensor 1,2 vibratory string from
Reduced by concussion frequency, the vibratory string of vibrating wire sensor 3,4 freely shakes frequency rise.When actual production is manufactured, vibratory string sensing
The relation of frequency values-inclination angle value of device is calculated, and square weighting average value and the inclination value changed according to frequency is fitted.
The original frequency of such as four vibrating string type sensors is f10, f20, f30, f40 respectively, measured value be respectively f11, f21, f31,
F41, angle value is then：k*[（f11-f10）²+（f21-f20）²+（f31-f30）²+（f41-f40）²]/4.Wherein K values are mark
Determine coefficient, demarcating fitting by measured value and actual corners angle value obtains.
During installation, the present apparatus should be used screw or be attached using structure glue with measured object so that the present apparatus can be accurate
The change of pitch angle of true quick response works.
Engineering survey is in use, after installation is complete, tackle the original frequency of each LVDT sensor or vibrating wire sensor
Value is acquired.When needing to measure angle, current frequency value is gathered, and difference meter is carried out with respective initial value
Calculate, obtain frequency-splitting.
Claims (2)
1. a kind of sensor-based inclination measurement device, it is characterised in that：Four sensors are provided with the device（1、2、3、4）,
It is respectively arranged in sliding block（5）Four sides, sensor（1、2、3、4）With sliding block（5）Between pass through metal tie rods（6）Even
Connect；
Sliding block（5）Pass through spring（7）With shell body（8）It is connected.
2. sensor-based inclination measurement device according to claim 1, it is characterised in that：Four sensors（1、2、
3、4）Type be LVDT or vibrating string type sensor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621459756.3U CN206496757U (en) | 2016-12-29 | 2016-12-29 | A kind of sensor-based inclination measurement device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621459756.3U CN206496757U (en) | 2016-12-29 | 2016-12-29 | A kind of sensor-based inclination measurement device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110645959A (en) * | 2018-06-26 | 2020-01-03 | 晶翔机电股份有限公司 | Surface slope discriminating device and discriminating method thereof |
-
2016
- 2016-12-29 CN CN201621459756.3U patent/CN206496757U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110645959A (en) * | 2018-06-26 | 2020-01-03 | 晶翔机电股份有限公司 | Surface slope discriminating device and discriminating method thereof |
| CN110645959B (en) * | 2018-06-26 | 2022-02-01 | 晶翔机电股份有限公司 | Surface slope discriminating device and discriminating method thereof |
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