CN106052623A - Non-rotating central installation type angular displacement measurement sensor and measurement method thereof - Google Patents
Non-rotating central installation type angular displacement measurement sensor and measurement method thereof Download PDFInfo
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- CN106052623A CN106052623A CN201610566516.1A CN201610566516A CN106052623A CN 106052623 A CN106052623 A CN 106052623A CN 201610566516 A CN201610566516 A CN 201610566516A CN 106052623 A CN106052623 A CN 106052623A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/22—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring angles or tapers; for testing the alignment of axes
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Abstract
The invention provides a non-rotating central installation type angular displacement measurement sensor and a measurement method. The sensor comprises a double-acceleration sensing unit type sensor, an A/D conversion module and a microprocessor. The double-acceleration sensing unit type sensor senses the change of the size of components of gravity acceleration and tangent acceleration of acceleration sensing units arranged at different horizontal height by using a bridge circuit formed by resistive strain gauges, and the change is calculated by the A/D conversion module and the microprocessor in turn so that the inclination angle value of a measured member is obtained and transmitted to an upper computer to be displayed through a signal conversion interface. According to the sensor, the defect that the conventional angular displacement sensor requires to be installed at the rotating center can be overcome, and the influence of tangent acceleration caused by installing at the non-rotating center can be eliminated by the simple algorithm; the double-acceleration sensing unit type sensor has the advantages of high sensitivity and high measurement accuracy; the microprocessor performs mathematical operation on the acquired signals so that operation is simple and convenient; and the signal conversion interface is used and other equipment can be accessed for cooperative work so that extensibility is great.
Description
Technical field
The present invention relates to a kind of sensor, be specifically related to a kind of non-rotary central installing type angular displacement sensor and measurement side
Method.
Background technology
Angle displacement measurement sensor is the sensor that industry spot is measured and is widely used in experimental technique, and generally it is wanted
Ask to be arranged on and sentenced elimination normal acceleration, the impact of tangential acceleration by geodesic structure center of rotation.Uses a large amount of for oil field
Beam pumping unit, usually through angle displacement measurement realize polished rod displacement from measurement.But, the particularity of field operations environment
Cause the method with huge quantity and there is following difficult point: 1, due to oil field operation environmental safety requirement, do not allow quilt
Survey mechanism's punching and sensor is installed, it is difficult to realize being arranged on sensor the purpose of center of rotation；2, gyroscope price relative to
Acceleration transducer price is high, drastically increases the cost of angle displacement measurement sensor.The oil field of countries in the world exists
Angle displacement measurement is utilized to all suffer from two above problem during realizing beam pumping unit polished rod displacement measurement.
At present, there are hundreds thousand of beam pumping units in China, is required to measure its polished rod displacement, even needs even
Continuous monitoring, to obtain the information such as oil machine operating mode, is to realize efficiently recovering the oil and the requisite measure of oil well informationization monitoring.But it is traditional
Have by the way of angle displacement measurement realizes polished rod displacement measurement cannot install at center of rotation, the problem such as high cost.
Summary of the invention
In order to solve the problem that above-mentioned prior art exists, it is an object of the invention to provide a kind of non-rotary central and install
Formula angular displacement sensor and measuring method, this sensor is without being arranged at the center of rotation of measured piece, it is only necessary to by simply
Calculating process and just can eliminate tangential acceleration that at non-rotary central, installation brings and affect, with low cost and ensure that survey
Accuracy of measurement.
In order to achieve the above object, the present invention adopts the following technical scheme that
A kind of non-rotary central installing type angular displacement sensor, including dual acceleration sensing unit formula sensor 2, double acceleration
Degree the first analog voltage delivery outlet 7 of sensing unit formula sensor 2 and the second analog voltage delivery outlet 8 respectively with A/D modulus of conversion
The first input end 9 of block 3 is connected with the second input 10, the input end of clock mouth 12 of A/D modular converter 3 and microprocessor 4
Clock line input and output I/O port 14 be connected, the data wire COM1 11 of A/D modular converter 3 and the number of microprocessor 4
Being connected according to line input and output I/O port 13, the reception sending output port 15 and signal translation interface 5 of microprocessor 4 is defeated
Inbound port 17 is connected, and the input port 16 that receives of microprocessor 4 is connected with the transmission output port 18 of signal translation interface 5
Connecing, the output port 19 that sends of signal translation interface 5 is connected with the reception input port 21 of host computer 6, signal translation interface 5
Receive input port 20 be connected with the transmission output port 22 of host computer 6；Dual acceleration sensing unit formula sensor 2, A/D
The power input of modular converter 3, microprocessor 4 and signal translation interface 5 is connected with power module 1；Described double acceleration
Degree sensing unit formula sensor 2 includes the first acceleration sensing unit 23 and second being horizontally disposed with and laying respectively at differing heights
Acceleration sensing unit 24.
It is disposed with the first resistance strain plate R1, the second resistance strain plate on the first described acceleration sensing unit 23
R2, the 3rd resistance strain plate R3 and the 4th resistance strain plate R4, and by electrical connection composition the first bridge circuit, the first bridge
Formula circuit connects the positive-negative input end of the first voltage follower 25, and the acceleration signal of measurement passes through the first voltage follower 25,
First analog voltage delivery outlet 7 and A/D of the i.e. dual acceleration sensing unit formula sensor 2 of the outfan of the first voltage follower 25
The first input end 9 of modular converter 3 is connected；It is disposed with the 5th resistance strain plate on described second acceleration sensing unit 24
R5, the 6th resistance strain plate R6, the 7th resistance strain plate R7 and the 8th resistance strain plate R8, and formed by electrical connection
Second bridge circuit, the second bridge circuit connects the positive-negative input end of the second voltage follower 26, and the acceleration signal of measurement leads to
Cross the second voltage follower 26, the outfan of the second voltage follower 26 i.e. the second of dual acceleration sensing unit formula sensor 2
Analog voltage delivery outlet 8 is connected with the second input 10 of A/D modular converter 3.
The measuring method of a kind of non-rotary central installing type angular displacement sensor described above, pacifies described non-rotary central
Dress formula angular displacement sensor fixed in position is on measured piece, and installation site is not required for the center of rotation of measured piece；Connect
Power module 1, energising starts dual acceleration sensing unit formula sensor 2, A/D modular converter 3, microprocessor 4 and signal and turns
Alias 5, when measured piece generation angle tilts, owing at this non-rotary central, installing type angle displacement measurement sensor is consolidated
Surely it is placed at the non-rotary central of measured piece, two acceleration sensing unit in dual acceleration sensing unit formula sensor 2
There is difference with the center of rotation of measured piece, each of which senses the component size on earth acceleration of gravity axle and tangentially adds
Velocity magnitude, and by the bridge circuit at respective place, acceleration simulation voltage signal is passed by dual acceleration sensing unit formula
First analog voltage output port 7 of sensor 2 and the second analog voltage delivery outlet 8 are respectively delivered to the first of A/D modular converter 3
Input 9 and the second input 10, the two-way analog acceleration signal that transmission comes is carried out high-resolution and adopts by A/D modular converter 3
After sample, handle the clock line input and output I/O port 14 12, the input end of clock mouth to A/D modular converter 3 by microprocessor 4
The sequencing contro instruction gone out, carrys out timing through A/D modulus of conversion by high-resolution sampled result according to the instruction of microprocessor 4 sequencing contro
The data wire COM1 11 of block 3 sends the data wire input and output I/O port 13 to microprocessor 4, and microprocessor 4 calculates reality
The inclination angle shift value on border, actual inclination angle value is transported to host computer 6 by signal translation interface 5 and shows by microprocessor 4
Showing, the output frequency of microprocessor 4 can be configured and to position, sensor angle by host computer 6 also by signal translation interface 5
The angle calibration moved；
The method of the inclination angle shift value that described microprocessor 4 calculates reality is as follows:
By described non-rotary central installing type angle displacement measurement sensor fixed in position on measured piece, installation site is not
Require the center of rotation for measured piece；Owing to installation site is not required at the center of rotation of measured piece, dual acceleration passes
Feel the distance of the center of rotation of two acceleration sensing unit and measured piece in modular sensor and there is difference；Highly different
The first acceleration sensing unit 23 and the second acceleration sensing unit 24, the acceleration recorded be respective acceleration of gravity and
Tangential acceleration, i.e. a1=aτ1+aθ1,a2=aτ2+aθ2, it is contemplated that two acceleration sensing unit are relative to horizontal inclination angle
Spend identical, have aθ1=aθ2, and tangential acceleration expression formula is aτ=β r, wherein, β is angular acceleration, and r is radius of turn；Count
Calculate a2-a1=aτ2+aθ2-(aτ1+aθ1)=β (r2-r1), try to achieveThis value is substituted in acceleration expression formula, hasThen there is angular displacement
The most relatively, the present invention possesses following advantage:
The component of the measured piece acceleration of gravity that the present invention is arrived by dual acceleration sensing unit formula sensor sensing and
The size variation of tangential acceleration by A/D modular converter, microprocessor, the value of angular displacement of the measured piece after calculating is passed through
Signal translation interface is transported to host computer and shows.This sensor overcomes conventional angular displacement transducer to be needed to be arranged on center of rotation
Shortcoming, installation site is not required at the center of rotation of measured piece, and is eliminated at non-rotary central by simple algorithm
The impact of the tangential acceleration brought is installed；Dual acceleration sensing unit formula sensor has highly sensitive and certainty of measurement is high
Advantage；Microprocessor is by the process that performs mathematical calculations the signal gathered, and computing is simple and convenient；Use signal translation interface,
Other equipment cooperatings accessible, favorable expandability；Host computer can carry out output frequency to microprocessor by communications command
Arranging, to meet the requirement of follow-up system, improve the sensor suitability, host computer can also be by communications command to biography simultaneously
The angle calibration of sensor angular displacement, more convenient；Parts additionally used are by the assembling of small package low power dissipation electron device
Becoming, volume is little, low in energy consumption.
Accompanying drawing explanation
Fig. 1 is each parts connection diagram of the present invention.
Fig. 2 is the structural representation of dual acceleration sensing unit formula sensor 2.
Fig. 3 is the first acceleration sensing unit 23 of the present invention and bridge circuit thereof and the wiring of the first voltage follower 25
Figure.
Fig. 4 is the second acceleration sensing unit 24 of the present invention and bridge circuit thereof and the wiring of the second voltage follower 26
Figure.
Fig. 5 is the principle schematic of the present invention.
Detailed description of the invention
The present invention is described in detail with detailed description of the invention below in conjunction with the accompanying drawings.
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, one non-rotary central installing type angular displacement sensor of the present invention, including double
The modular sensor of acceleration sensing 2, in dual acceleration sensing unit formula sensor 2 the first of first acceleration sensing unit 23
Resistance strain plate R1, the second resistance strain plate R2, the 3rd resistance strain plate R3 and the 4th resistance strain plate R4 composition
Bridge circuit, is connected with the first voltage follower 25, and the first voltage follower 25 is sensed by dual acceleration sensing unit formula
First analog voltage delivery outlet 7 of device is connected with the first input end 9 of A/D modular converter 3, the second acceleration sensing unit 24
The 5th resistance strain plate R5, the 6th resistance strain plate R6, the 7th resistance strain plate R7 and the 8th resistance strain plate
R8 forms bridge circuit, is connected with the second voltage follower 26, and the second voltage follower 26 is by dual acceleration sensing unit
Second analog voltage delivery outlet 8 of formula sensor is connected with the second input 10 of A/D modular converter 3, A/D modular converter 3
Input end of clock mouth 12 be connected by Capacitance Unbalance in Telecom Cables with the clock line input and output I/O port 14 of microprocessor 4, A/D
The data wire COM1 11 of modular converter 3 and the data wire input and output I/O port 13 of microprocessor 4 are by communication cable phase
Connecting, the output port 15 that sends of microprocessor 4 is connected by communication cable with the reception input port 17 of signal translation interface 5
Connecing, the input port 16 that receives of microprocessor 4 is connected by communication cable with the transmission output port 18 of signal translation interface 5
Connecing, the output port 19 that sends of signal translation interface 5 is connected by communication cable with the reception input port 21 of host computer 6,
The input port 20 that receives of signal translation interface 5 is connected by communication cable with the transmission input port 22 of host computer 6；Double add
The power input of the modular sensor of velocity pick-up 2, A/D modular converter 3, microprocessor 4 and signal translation interface 5 passes through
Power cable is connected with power module 1.
The measuring method of a kind of non-rotary central installing type angular displacement sensor described above, pacifies described non-rotary central
Dress formula angular displacement sensor fixed in position installation site on measured piece is not required for the center of rotation of measured piece；Connect electricity
Source module 1, energising starts dual acceleration sensing unit formula sensor 2, A/D modular converter 3, microprocessor 4 and signal conversion
Interface 5, when measured piece generation angle tilts, owing at this non-rotary central, installing type angle displacement measurement sensor is fixed
Being placed at the non-rotary central of measured piece, dual acceleration sensing unit formula sensor 2 senses earth acceleration of gravity at it
Component size on different sensing unit each axles and tangential acceleration size, and will be accelerated by the bridge circuit at respective place
The first analog voltage output port 7 and the second simulation by dual acceleration sensing unit formula sensor 2 of the degree analog voltage signal
Voltage output 8 is respectively delivered to first input end 9 and second input 10 of A/D modular converter 3, and A/D modular converter 3 will be sent out
After the two-way analog acceleration signal sent here carries out high-resolution sampling, handle clock line input and output I/O by microprocessor 4
The sequencing contro instruction that port 14 sends to the input end of clock mouth 12 of A/D modular converter 3, by high-resolution sampled result according to
The instruction of microprocessor 4 sequencing contro carrys out timing and sends to microprocessor 4 through the data wire COM1 11 of A/D modular converter 3
Data wire input and output I/O port 13, microprocessor 4 calculates the inclination angle shift value of reality, and microprocessor 4 is by actual inclination
Angle value is transported to host computer 6 by signal translation interface 5 and shows, host computer 6 can be to micro-process also by signal translation interface 5
The output frequency of device 4 is configured and angle calibration to sensor angular displacement；This sensor overcomes conventional angular displacement and passes
Sensor needs to be arranged on the shortcoming of center of rotation, eliminates the impact of tangential acceleration at non-rotary central by simple algorithm；
Dual acceleration sensing unit formula sensor 2 has highly sensitive and that certainty of measurement is high advantage；Microprocessor is by compiling voluntarily
Program, perform mathematical calculations process to the signal gathered, and obtains required value；Use signal translation interface 5, can be accessed by other
Equipment come cooperating, favorable expandability；Parts additionally used are assembled by small package low power dissipation electron device, volume
Little, low in energy consumption.
Utilize dual acceleration sensing unit formula sensor as shown in Figure 1, be made up of two acceleration sensing unit.Respectively
Measure acceleration of gravity and the tangential acceleration signal obtaining each sensing unit.As it is shown in figure 5, acceleration transducer is arranged on
The top of oil pumping machine oil beam, it is to avoid punching is installed at center of rotation, it is ensured that use under particular job environment of oil field
Safety.The first acceleration sensing unit 23 and the second acceleration sensing unit 24, acceleration that they record for differing heights
Degree is respective acceleration of gravity and tangential acceleration, i.e. a1=aτ1+aθ1,a2=aτ2+aθ2, it is contemplated that two acceleration sensing lists
Unit is identical relative to horizontal angle of inclination, has aθ1=aθ2, and tangential acceleration expression formula is aτ=β r, wherein, β is that angle adds
Speed, r is radius of turn.It is calculating a2-a1=aτ2+aθ2-(aτ1+aθ1)=β (r2-r1), admittedly try to achieveBy this value
Substitute in acceleration expression formula, haveThen there is angular displacementThe fag end of oil pumper
Polished rod displacement is y=θ R, wherein R be kowtow machine relatively oil beam center of rotation the radius of gyration.
Claims (3)
1. a non-rotary central installing type angular displacement sensor, it is characterised in that: include that dual acceleration sensing unit formula senses
Device (2), the first analog voltage delivery outlet (7) of dual acceleration sensing unit formula sensor (2) and the second analog voltage delivery outlet
(8) it is connected with the second input (10) with the first input end (9) of A/D modular converter (3) respectively, A/D modular converter (3)
Input end of clock mouth (12) is connected with clock line input and output I/O port (14) of microprocessor (4), A/D modular converter (3)
Data wire COM1 (11) be connected with data wire input and output I/O port (13) of microprocessor (4), microprocessor
(4) transmission output port (15) is connected with the reception input port (17) of signal translation interface (5), microprocessor (4)
Receive input port (16) to be connected with the transmission output port (18) of signal translation interface (5), sending out of signal translation interface (5)
Output port (19) is sent to be connected with the reception input port (21) of host computer (6), the reception input of signal translation interface (5)
Mouth (20) is connected with the transmission output port (22) of host computer (6)；Dual acceleration sensing unit formula sensor (2), A/D change
The power input of module (3), microprocessor (4) and signal translation interface (5) is connected with power module (1)；Described double
The modular sensor of acceleration sensing (2) includes the first acceleration sensing unit being horizontally disposed with and laying respectively at differing heights
(23) and the second acceleration sensing unit (24).
A kind of non-rotary central installing type angular displacement sensor the most according to claim 1, it is characterised in that: described the
The first resistance strain plate (R1), the second resistance strain plate (R2), the 3rd electricity it is disposed with on one acceleration sensing unit (23)
Resistive foil gauge (R3) and the 4th resistance strain plate (R4), and by electrical connection composition the first bridge circuit, the first bridge-type electricity
Road connects the positive-negative input end of the first voltage follower (25), and the acceleration signal of measurement is defeated by the first voltage follower (25)
Go out the of the first analog voltage delivery outlet (7) of the i.e. dual acceleration sensing unit formula sensor (2) of end and A/D modular converter (3)
One input (9) is connected；Be disposed with on described second acceleration sensing unit (24) the 5th resistance strain plate (R5), the 6th
Resistance strain plate (R6), the 7th resistance strain plate (R7) and the 8th resistance strain plate (R8), and formed by electrical connection
Second bridge circuit, the second bridge circuit connects the positive-negative input end of the second voltage follower (26), the acceleration signal of measurement
By the second voltage follower (26) outfan i.e. the second analog voltage delivery outlet of dual acceleration sensing unit formula sensor (2)
(8) it is connected with second input (10) of A/D modular converter (3).
3. the measuring method of a kind of non-rotary central installing type angular displacement sensor described in claim 2, it is characterised in that: by institute
Stating non-rotary central installing type angular displacement sensor fixed in position on measured piece, installation site is not required for measured piece
Center of rotation；The module that switches on power (1), energising start dual acceleration sensing unit formula sensor (2), A/D modular converter (3),
Microprocessor (4) and signal translation interface (5), when measured piece generation angle tilts, owing to pacifying at this non-rotary central
Dress formula angle displacement measurement sensor is fixedly mounted at the non-rotary central of measured piece, and dual acceleration sensing unit formula senses
In device (2) there is difference in the center of rotation of two acceleration sensing unit and measured piece, and each of which sensing terrestrial gravitation adds
Component size on speed axle and tangential acceleration size, and by the bridge circuit at respective place, acceleration simulation voltage is believed
Number by the first analog voltage output port (7) of dual acceleration sensing unit formula sensor (2) and the output of the second analog voltage
Mouth (8) is respectively delivered to first input end (9) and second input (10) of A/D modular converter (3), and A/D modular converter (3) will
After the two-way analog acceleration signal that transmission comes carries out high-resolution sampling, handle clock line input by microprocessor (4) defeated
Go out the sequencing contro instruction that I/O port (14) sends to the input end of clock mouth (12) of A/D modular converter (3), by high-resolution
Sampled result carrys out the timing data wire COM1 (11) through A/D modular converter (3) according to the instruction of microprocessor (4) sequencing contro
Sending data wire input and output I/O port (13) to microprocessor (4), microprocessor (4) calculates actual inclination angle displacement
Value, actual inclination angle value is transported to host computer (6) by signal translation interface (5) and shows by microprocessor (4), host computer
(6) output frequency of microprocessor (4) can be configured and to sensor angular displacement also by signal translation interface (5)
Angle calibration；
The method that described microprocessor (4) calculates actual inclination angle shift value is as follows:
By described non-rotary central installing type angle displacement measurement sensor fixed in position on measured piece, installation site not requirement
Center of rotation for measured piece；Due to the particularity of structure, two acceleration sensing unit that this sensor comprises are with tested
There is difference in the distance of the center of rotation of amount part, the first acceleration sensing unit (23) and the second acceleration sensing of differing heights
Unit (24), the acceleration recorded is respective acceleration of gravity and tangential acceleration, i.e. a1=aτ1+aθ1,a2=aτ2+aθ2, examine
Consider identical relative to horizontal angle of inclination to two acceleration sensing unit, have aθ1=aθ2, and tangential acceleration expression formula is
aτ=β r, wherein, β is angular acceleration, and r is radius of turn；It is calculating a2-a1=aτ2+aθ2-(aτ1+aθ1)=β (r2-r1), try to achieveThis value is substituted in acceleration expression formula, hasThen there is angular displacement
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| CN109387202A (en) * | 2017-08-08 | 2019-02-26 | 航天科工惯性技术有限公司 | A kind of wind tower and measurement and the method for calculating wind tower Miniature posture |
| CN113484741A (en) * | 2021-06-09 | 2021-10-08 | 国网浙江海盐县供电有限公司 | GIS disconnecting switch working state monitoring device and method |
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| CN113484741A (en) * | 2021-06-09 | 2021-10-08 | 国网浙江海盐县供电有限公司 | GIS disconnecting switch working state monitoring device and method |
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| Publication number | Publication date |
|---|---|
| CN106052623B (en) | 2018-10-19 |
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