CN209689707U - It is a kind of that variable tension and image recognition technology is taken to measure the detection device of storage tank density, liquid level - Google Patents
It is a kind of that variable tension and image recognition technology is taken to measure the detection device of storage tank density, liquid level Download PDFInfo
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- CN209689707U CN209689707U CN201920742324.0U CN201920742324U CN209689707U CN 209689707 U CN209689707 U CN 209689707U CN 201920742324 U CN201920742324 U CN 201920742324U CN 209689707 U CN209689707 U CN 209689707U
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Abstract
Variable tension and image recognition technology is taken to measure the detection device of storage tank density, liquid level, including measuring cylinder, oil dipstick, directive wheel, tension sensor, small directive wheel, oil dipstick folding and unfolding wheel, cabinet, video camera, guide wheel bracket, stepper motor, magnetic coupling, controller, oil dipstick folding and unfolding wheel support, signal control line, diffuser assembly, signal wire the utility model discloses a kind of；It further include image processing module, tank side display；Oil dipstick folding and unfolding wheel, small directive wheel, directive wheel are equipped in cabinet；Measuring cylinder is connected on oil dipstick；Oil dipstick successively passes through directive wheel, small directive wheel, is fixed on oil dipstick folding and unfolding wheel, and stepper motor drives the rotation of oil dipstick folding and unfolding wheel；Tension sensor is connected on the controller by signal wire；The scale on oil dipstick is read in video camera shooting.The utility model is structurally reasonable, layout is exquisite；Detect accurate, easy to operate, the good technical effect with initiative.
Description
Technical field
The present invention relates to the detection devices of a kind of storage tank density, liquid level, take variable tension and figure more particularly to one kind
The detection device of storage tank density, liquid level is detected as identification technology.
Background technique
Currently, according to operating instruction, being needed periodically to the density of liquid in storage tank, liquid level, that is, liquid in petrochemicals library
The parameters such as face position carry out artificial detection, to determine the numerical value such as density, liquid level of medium in storage tank, meet in actual production to storage
The storage measuration of medium in tank.In present practical operation, the final step as metering is accurately verified, typically
Tank top must be climbed to by operator, detection hole is opened, the verification of density, liquid level is carried out using oil dipstick, densitometer.
The height of general storage tank is all tens of rice, and it is entirely to carry out in operating process in high-altitude that this operation operation, which is related to operation of ascending a height,.
If having accidentally, there are the risks that personal height falls；In the season in summer and winter, operating environment is more severe, and labour is strong
Degree is also bigger, and there is also the limitations artificially observed for the precision of measurement.
Summary of the invention
Goal of the invention: being directed to above-mentioned existing problem and shortage, the object of the present invention is to provide one kind to detect automatically,
High, the easy to operate detection device for taking variable tension and image recognition technology measurement storage tank density, liquid level of detection accuracy.
Technical solution: for achieving the above object, the technical solution adopted by the present invention are as follows:
A kind of detection device for taking variable tension and image recognition technology measurement storage tank density, liquid level, including measuring cylinder,
Oil dipstick, directive wheel, tension sensor, small directive wheel, oil dipstick folding and unfolding wheel, cabinet, video camera, guide wheel bracket, stepping electricity
Machine, magnetic coupling, controller, oil dipstick folding and unfolding wheel support, signal control line, diffuser assembly, signal wire；
The cabinet is explosion-proof stainless steel cabinet, is equipped with the through hole of oil dipstick in lower end；It is connected into diffuser assembly
It is integrated, and is connected in storage tank detection hole position；Storage tank detection hole flange face position is artificial detection base position；
Detection device is equipped with diffuser assembly, is the shape on video camera detection window of the oil gas in order to avoid overflowing on a small quantity
At condensation, the acquisition of detection data is influenced, while increasing the safety of entire measuring device, the diffuser assembly is equipped with expansion
The cylinder-like structure body of drainage hole is dissipated, middle part is equipped with the through hole of oil dipstick from top to bottom；
Oil dipstick folding and unfolding wheel, small directive wheel, directive wheel are equipped in the cabinet；Oil dipstick folding and unfolding wheel support is arranged in machine
In case internal side wall, oil dipstick folding and unfolding wheel is mounted on oil dipstick folding and unfolding wheel support；Small directive wheel is arranged in oil dipstick folding and unfolding wheel
Left side top position, and be connected on cabinet inside side wall by small guide wheel bracket；Small directive wheel is arranged in directive wheel
Left side top position, is mounted on guide wheel bracket, and suspension is connected on the inner wall of cabinet on guide wheel bracket；
The oil dipstick is the stainless steel measurement oil dipstick produced by measurement certification producer, and bottom end is fixedly connected on described
In measuring cylinder；The measuring cylinder is hollow stainless steel cylindrical body, and when measuring state is hung vertically in the inside of storage tank；
The oil dipstick is pierced by by storage tank detection hole upwards from measuring cylinder, by the through hole on diffuser assembly, is entered
In cabinet, turn back downwards by directive wheel, the oil dipstick of directive wheel two sides is parallel to each other；Then left side through too small directive wheel to
Lower right extends on oil dipstick folding and unfolding wheel, and the other end is fixedly connected on oil dipstick folding and unfolding wheel；
The stepper motor drives the rotation of oil dipstick folding and unfolding wheel by magnetic coupling, and is controlled by controller by signal
The revolving speed and positive and reverse steering of line traffic control oil dipstick folding and unfolding wheel；
Lead it is described on wheel support be equipped with tension sensor, by signal wire connection on the controller；
It is equipped with video camera in directive wheel leftward position, for shooting the scale value read on oil dipstick；The installation of video camera
Position is camera shooting machine testing base position；
Detection device further includes image processing module, tank side display；The scale value on oil dipstick is read in video camera shooting
It is identified by image processing module, then passes through the processing of controller, be shown in by tank on display；Display setting exists by tank
Manually it is easily observe that on height and position.
It advanced optimizes, specifically, diffuser assembly is by connecting flange, closed section, closed section top, diffusion draining
Hole, gasket, rain cover, waterproof platform, gasket fixing bolt composition；
The connecting flange is connected in the detection hole of storage tank, and connecting flange is equipped with closed section, and the upper end of closed section connects
It is connected at the top of closed section, forms the inner cavity of opposing seal；Effect is to stop the oil gas in storage tank in this inner cavity, prevents oil gas
Evolution；
Gasket is linked together by gasket fixing bolt under at the top of the closed section；Purpose is in measuring cylinder
It when not working when hit the ceiling, is in contact with gasket, forms the sealing of tank inside, prevent oil gas from constantly escaping
Into the volume cabinet of detection device, increase the explosive-proof grade of detection device；
Waterproof platform is equipped in closed section middle top position；Purpose is to prevent the rainwater of external open environment into storage tank
It is interior；
The upper surface of at the top of the closed section at cylinder, it is equipped at intervals with multistage diffusion drainage hole；So as in measuring state,
It is rapidly diffused into atmosphere from the micro oil gas in storage tank evolution；
It is equipped at least two layers of waterproof cover in the upper of diffusion drainage hole, waterproof cover is the waterproof for having certain taper shape
Cover；When the rainwater of external environment can be made to call in from diffusion drainage hole, flows out, will not enter naturally from the surface of conical shape
To tank inside.
Diffuser assembly is arranged, and mainly there are two important function: first is that avoiding the gas in storage tank directly whole with detection device
The contact of body reduces the explosion-proof area divided rank in detection device；When equipment carries out detection work, micro gas overflowing
It will be directly diffused into atmosphere；In the non-detection stage, measuring cylinder is raised in diffuser, and gasket is compressed at the top of measuring cylinder, will
The channel for generating micro-gas leakage is completely enclosed.Second is that gas in storage tank is avoided to be directly entered detection device, video camera every
From condensation is generated on window, identification of the video camera to image is influenced.
Optimization, the tension sensor is the explosion-proof type pull sensing by high-precision corrugated stainless steel tubing welded seal
Device.
Optimization, the directive wheel, small directive wheel, oil dipstick folding and unfolding wheel are the metal wheel with graphite bushing.
Optimization, the guide wheel bracket, oil dipstick folding and unfolding wheel support and small guide wheel bracket are the branch of metal material
Frame.
By upper, primarily with respect to storage tank density measure:
It is a kind of that variable tension and image recognition technology is taken to measure the detection of storage tank density using detection device of the invention
Method, steps are as follows:
After detection device receives the order for starting detection, video camera is to the oil dipstick for imaging machine testing base position first
Reading is read out；
Controller control oil dipstick folding and unfolding wheel rotates clockwise, by oil dipstick slowly to decentralization；
When measuring cylinder is not in contact with liquid level is arrived, tension sensor only experiences the drawing of the weight generation of measuring cylinder and oil dipstick
Power；As controller continues oil dipstick to decentralization, tension sensor can be detected to be generated since oil dipstick length changes
Tension variations；But before measuring cylinder touches liquid level, the tension variations rate in tension sensor is substantially zeroed；
After measuring cylinder touches liquid level, due to the effect of buoyancy, the pulling force detected in tension sensor will be unexpected
Become smaller；Video camera is read out oil dipstick reading；As the continuation of dipstick is to decentralization, the reason of because of buoyancy, pulling force is passed
The pulling force detected on sensor can become also to come smaller；
After measuring cylinder is totally immersed into liquid level, the variation of the pulling force detected in tension sensor will become smaller suddenly；It takes the photograph
Camera is read out oil dipstick reading；
According to video camera reading as a result, image processing module carries out identifying processing to data, controller is former according to measurement
The method described in reason is handled, and finally shows the result of the storage tank density of measurement by the tank on display；
Continue to transfer in measuring cylinder, be immersed in subsurface any position, the small pulling force that tension sensor detects becomes
Change, just will detect that the minor change of fluid density of the fluid to be measured on different height position accordingly.
Secondly, about level gauging:
Detection device of the invention is taken, it is a kind of that variable tension and image recognition technology is taken to measure the detection of tank level
Method, steps are as follows:
After detection device receives the order for starting detection, video camera is to the oil dipstick for imaging machine testing base position first
Reading is read out；
Controller control oil dipstick folding and unfolding wheel rotates clockwise, by oil dipstick slowly to decentralization, in measuring cylinder not in contact with arriving
When liquid level, tension sensor only experiences the pulling force of the weight generation of measuring cylinder and oil dipstick；This pulling force is greater than constant force
Control target value, controller continues to oil dipstick to decentralization；After measuring cylinder touches liquid level, due to the effect of buoyancy,
Pulling force in tension sensor will become smaller and smaller；Until tension sensor on pulling force close to constant force control target
Value, controller will do more accurate rotation to oil dipstick folding and unfolding wheel and control, until the pulling force in tension sensor reaches control mesh
Scale value；
After stabilization, video camera is read out the oil dipstick reading of camera shooting machine testing base position again；
According to video camera reading as a result, image processing module carries out identifying processing to data, controller is former according to measurement
The method described in reason is handled, and finally shows the result of the tank level of measurement by the tank on display.
The utility model has the advantages that compared with prior art, of the invention takes variable tension and image recognition technology measurement storage tank close
The detection device of degree, liquid level, structurally reasonable, layout exquisiteness；Precise measurement very easily can be carried out to the density in storage tank；Together
The method of Shi Caiyong variable tension uses the control strategy of variable tension to the tension of oil dipstick when measuring tank level, from
The dynamic detection completed to the liquid level of material in tank；The work of the dipping of artificial detection storage tank liquid liquid level can be replaced, mitigated
The labor intensity and operating risk of operator, improves the automatic collection and Accurate Determining of measurement data；Reduce artificial
The uncertainty that the error of observation generates；With initiative good technical effect.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of measuring device of the present invention (with diffuser assembly)；
Fig. 2 is the specific structure diagrammatic cross-section of diffuser assembly in measuring device of the present invention；
Fig. 3 is density measure schematic illustration of the present invention；
Fig. 4 is level gauging schematic illustration of the present invention；
Wherein: mechanical structure portion, comprising: 1 measuring cylinder, 2 oil dipsticks, 3 directive wheels, 4 explosion-proof tension sensors (contain pulling force
Cell overload protection mechanism), 5 small directive wheels, 6 oil dipstick folding and unfolding wheels, 7 cabinets, 8 video cameras, 9 guide wheel brackets, 10 steppings
Motor, 11 magnetic couplings, 12 controllers, 13 oil dipstick folding and unfolding wheel supports, 14 signal control lines, 15 diffuser assemblies；
Wherein 15 components include: 1501 connecting flanges, 1502 closed sections, 1503 closed sections top, and 1504 spread drainage holes,
1505 gaskets, 1506 rain covers, 1507 waterproof platforms, 1508 gasket fixing bolts；
Further include: display by image processing module, tank.
Specific embodiment
In the following with reference to the drawings and specific embodiments, the present invention is furture elucidated, it should be understood that these embodiments are merely to illustrate
It the present invention rather than limits the scope of the invention, after the present invention has been read, those skilled in the art are to of the invention each
The modification of kind equivalent form falls within the application range as defined in the appended claims.
It is a kind of as shown in Figure 1: that variable tension and image recognition technology is taken to measure the detection device of storage tank density, liquid level,
Including measuring cylinder 1, oil dipstick 2, directive wheel 3, tension sensor 4, small directive wheel 5, oil dipstick folding and unfolding wheel 6, cabinet 7, video camera
8, guide wheel bracket 9, stepper motor 10, magnetic coupling 11, controller 12, oil dipstick folding and unfolding wheel support 13, signal control line
14, diffuser assembly 15, signal wire 16；
Cabinet 7 is explosion-proof stainless steel cabinet, is equipped with the through hole of oil dipstick 2 in lower end；It is connected into diffuser assembly 15
It is integrated, and is connected in storage tank detection hole position；Storage tank detection hole flange face position is artificial detection base position；
Detection device is equipped with diffuser assembly, is the shape on video camera detection window of the oil gas in order to avoid overflowing on a small quantity
At condensation, the acquisition of detection data is influenced, while increasing the safety of entire measuring device；Diffuser assembly 15 is equipped with diffusion
The cylinder-like structure body of drainage hole, middle part are equipped with the through hole of oil dipstick 2 from top to bottom；
Oil dipstick folding and unfolding wheel 6, small directive wheel 5, directive wheel 3 are equipped in cabinet 7；The setting of oil dipstick folding and unfolding wheel support 13 exists
In 7 internal side wall of cabinet, oil dipstick folding and unfolding wheel 6 is mounted on oil dipstick folding and unfolding wheel support 13；Small directive wheel 5 is arranged in oil dipstick
The left side top position of folding and unfolding wheel 6, and be connected in 7 internal side wall of cabinet by small guide wheel bracket；Directive wheel 3 is arranged small
The left side top position of directive wheel 5, is mounted on guide wheel bracket 9, and suspension is connected to the inner wall of cabinet 7 on guide wheel bracket 9
On；
Oil dipstick 2 is the stainless steel measurement oil dipstick produced by measurement certification producer, and bottom end is fixedly connected on the survey
On graduated cylinder 1；The measuring cylinder 1 is hollow stainless steel cylindrical body, and when measuring state is hung vertically in the inside of storage tank；
Oil dipstick 2 is pierced by by storage tank detection hole upwards from measuring cylinder 1, by the through hole on diffuser assembly 15, is entered
It in cabinet 7, turns back downwards by directive wheel 3, the oil dipstick 2 of 3 two sides of directive wheel is parallel to each other；Then through too small directive wheel 5
Left side is extended to the right on oil dipstick folding and unfolding wheel 6, and the other end is fixedly connected on oil dipstick folding and unfolding wheel 6；
Stepper motor 10 drives oil dipstick folding and unfolding wheel 6 to rotate by magnetic coupling 11, and passes through signal by controller 12
The revolving speed and positive and reverse steering of the control oil dipstick folding and unfolding wheel 6 of control line 14；
It is equipped with tension sensor 4 on guide wheel bracket 9, is connected on controller 12 by signal wire 16；
It is equipped with video camera 8 in 3 leftward position of directive wheel, for shooting the scale value read on oil dipstick 2；Video camera 8
Installation site is camera shooting machine testing base position；
Detection device further includes image processing module, tank side display；The scale on oil dipstick 2 is read in the shooting of video camera 8
Value is identified by image processing module, then passes through the processing of controller 12, is shown in by tank on display；Display is set by tank
It sets and is easily observe that on height and position manually.
It is as shown in Figure 2: to advanced optimize, specifically, diffuser assembly 15 is by connecting flange 1501, closed section
1502,1503 at the top of closed section, drainage hole 1504 is spread, gasket 1505, waterproof cover 1506, waterproof platform 1507, gasket are solid
Determine the composition of bolt 1508；
Connecting flange 1501 is connected in the detection hole of storage tank, and connecting flange 1501 is equipped with closed section 1502, closed section
1502 upper end is connected with 1503 at the top of closed section, forms the inner cavity of opposing seal；Effect is to be blocked in the oil gas in storage tank
In this inner cavity, prevent oil gas from escaping；
Gasket 1505 is linked together by gasket fixing bolt 1508 under 1503 at the top of the closed section；Purpose is
It when measuring cylinder 1 does not work when hit the ceiling, is in contact with gasket 1505, forms the sealing of tank inside, prevent
Oil gas constantly escapes into the volume cabinet of detection device, increases the explosive-proof grade of detection device；
1503 medium positions are equipped with waterproof platform 1507 at the top of closed section；Purpose be prevent the rainwater of external open environment into
In storage tank；
At the top of the closed section at the upper surface of 1503 cylinders, it is equipped at intervals with multistage diffusion drainage hole 1504；So as in measurement shape
When state, rapidly diffused into atmosphere from the micro oil gas in storage tank evolution；
Upper in diffusion drainage hole 1504 is equipped at least two layers of waterproof cover 1506, and waterproof cover 1506 is to have certain taper shape
Waterproof cover；When the rainwater of external environment can be made to call in from diffusion drainage hole 1504, flowed naturally from the surface of conical shape
Out, tank inside will not be entered.
Diffuser assembly is arranged, and mainly there are two important function: first is that avoiding the gas in storage tank directly whole with detection device
The contact of body reduces the explosion-proof area divided rank in detection device；When equipment carries out detection work, micro gas overflowing
It will be directly diffused into atmosphere；In the non-detection stage, measuring cylinder is raised in diffuser, and gasket is compressed at the top of measuring cylinder, will
The channel for generating micro-gas leakage is completely enclosed.Second is that gas in storage tank is avoided to be directly entered detection device, video camera every
From condensation is generated on window, identification of the video camera to image is influenced.
Optimization, tension sensor 4 is the explosion-proof type tension sensor by high-precision corrugated stainless steel tubing welded seal.
Optimization, directive wheel 3, small directive wheel 5, oil dipstick folding and unfolding wheel 6 are the metal wheel with graphite bushing.
Optimization, guide wheel bracket 9, oil dipstick folding and unfolding wheel support 13 and small guide wheel bracket are the branch of metal material
Frame.
Measuring principle: measuring cylinder bottom is located at artificial detection datum mark when starting, to illustrate measuring principle.
A. density measure: as shown in figure 3,
The weight of measuring cylinder is designed to 1.1 times of weight of androgynous ponding, it is believed that " averag density " of measuring cylinder be
1.1g/cm3(density of water is regarded as 1.0g/cm3), this density is greater than the density of most measured mediums.As stepper motor drives
Oil dipstick folding and unfolding wheel rotates clockwise, and measuring cylinder will move down.The position that measuring cylinder drops to, by video camera to oil dipstick
Reading result determine.It is available according to the principle of dynamic balance when measuring cylinder rests on any position of liquid level or less:
F/2=(L + Lg-Lclt)*ρlyc+ Wclt– (Vclt + Ljr*Slyc) * ρ (1)
It can be exported by formula (1):
ρ=【F/2-(L + Lg-Lclt)*ρgl- Wclt】/(Vclt + Ljr*Slyc) (2)
In formula (1), (2)
ρ is material density (detected parameter) in tank；
F is the stress (can be measured by tension sensor) in tension sensor；
L is the length (video camera reading) that oil dipstick is put down；
LgIt is oil dipstick from artificial detection benchmark to the distance between camera shooting machine testing benchmark (constant)；
LcltFor measuring cylinder length (constant)；
ρlycFor the weight (constant) of oil dipstick unit length；
WcltFor the weight (constant) of measuring cylinder；
VcltFor measuring cylinder volume (constant)；
LjrFor immersed in liquid level oil dipstick length (with the decline of measuring cylinder, when measuring cylinder touches liquid level, due to floating
The effect of power, the variation that the tension in tension sensor can significantly reduce, once measuring cylinder is completely immersed in liquid level, this
Power, which significantly changes, to disappear, and dropping distance hereafter is exactly the oil dipstick length of immersed in liquid level.That is, this parameter
During being declined according to measuring cylinder, the reading ruler result of video camera after the suddenly change of tension sensor and this variation disappearance；
SlycFor the sectional area (constant) of oil dipstick；
Formula (2) is exactly the formula for calculating material density in tank.It is obvious that the various parameters in formula (2), in addition to constant with
Outside, other parameters can be calculated by detection and indirectly.
B. level gauging: as shown in figure 4,
When carrying out density measure, " averag density " of the measuring cylinder of design is 1.1g/cm3, it is greater than tested material density, protects
Demonstrate,proving measuring cylinder can be with the oil dipstick immersed in liquid level of decentralization.Using this same measuring cylinder, level gauging is carried out, if it is possible to
Allow and keep a fixed tension (pulling force) on oil dipstick, no matter liquid level in any position, if this tension fixed can guarantee
Measuring cylinder will not be completely immersed in liquid level, and measuring cylinder will not be completely pulled out liquid level, when liquid level changes, measuring cylinder energy
The variation of liquid level is followed, " is floated " on liquid level always.
Illustrate that this process can be easier to understand by real data.
Such as the maximum magnitude of fluid change is 30 meters, the specification of oil dipstick be it is 15 millimeters wide, 0.2 millimeter of thickness.Measurement
The outer diameter of cylinder is 130 millimeters, and the length of measuring cylinder is 300 millimeters.The volume of measuring cylinder is exactly 3980 cubic centimetres, measuring cylinder
When weight is artificially arranged to 1.1 times of weight of peer ponding, its weight is exactly (3980*1.1=) 4378 grammes per square metre.With quilt
Survey material density be 0.876 for, when measuring cylinder is completely immersed in tested material, material generate buoyancy be equal to 3980*0.876=
3486 grams.Measuring cylinder weight subtracts this buoyancy and is ensuring that the lowest pull (4378-3486)=892 gram that measuring cylinder is not sunk,
In view of the influence (weight of 30 meters of long oil dipsticks is about 1000 grams) of the oil dipstick weight in minimum level, then this is protected
The lowest pull that card measuring cylinder is not sunk in minimum level is exactly 892+1000=1892 gram.That is, if can the amount of allowing
The fixation tension (pulling force) kept on dipstick is greater than 1892 grams, for example is set as 1900 grams, then measuring cylinder will be with liquid level
Change " floating " on liquid level.
In other words, as long as controller passes through the rotation of control oil dipstick folding and unfolding wheel, so that tension sensor is surveyed in liquid level
During amount, 3800 grams of constant force is remained, measuring cylinder will be with fluid change " floating " on liquid level.
According to Fig. 4, under the control of fixed pulling force, when fluid change is any to position, following formula is set up.
F/2=(L + Lg-Lclt)*ρlyc+ Wclt–Sclt *Lx* (3) ρ
It can be exported by formula (3):
Lx=【F/2-(L + Lg-Lclt)* ρlyc- Wclt】/ Sclt* (4) ρ
In formula (3), (4)
LxFor the measuring cylinder length under immersed in liquid level
F is the stress (being measured by tension sensor, be set as steady state value when measuring liquid level) in tension sensor
L is the length (being read by video camera) that oil dipstick is put down
LgIt is oil dipstick the distance between from detection benchmark to contact point with directive wheel (constant)
LcltFor measuring cylinder length (constant)
ρlycFor the weight (constant) of oil dipstick unit length
WcltFor the weight (constant) of measuring cylinder
ScltFor measuring cylinder sectional area (constant)
ρ is material density in tank (being obtained by detection, see Density Detection principle)
Formula (4) be exactly in any liquid level position, under fixed tension force, the length gauge of part under measuring cylinder immersed in liquid level
Calculate formula.
There is the calculated result of partial-length under measuring cylinder immersed in liquid level, the height that liquid level leaves detection benchmark is exactly L-
Lx.This namely result of hand-dipping in fact.
It can be seen that in the measurement process to both parameters from the above-mentioned measuring principle to density and liquid level, amount oil
The tension situation of ruler is entirely different.When carrying out density measure, do not need to intervene tension.When measuring liquid level, use
The method of tension force；Here it is be referred to as variable tension method this method.
To sum up, primarily with respect to storage tank density measure:
A kind of that variable tension and image recognition technology is taken to measure the detection method of storage tank density, steps are as follows:
After detection device receives the order for starting detection, video camera is to the oil dipstick for imaging machine testing base position first
Reading is read out；
Controller control oil dipstick folding and unfolding wheel rotates clockwise, by oil dipstick slowly to decentralization；
When measuring cylinder is not in contact with liquid level is arrived, tension sensor only experiences the drawing of the weight generation of measuring cylinder and oil dipstick
Power；As controller continues oil dipstick to decentralization, tension sensor can be detected to be generated since oil dipstick length changes
Tension variations；But before measuring cylinder touches liquid level, the tension variations rate in tension sensor is substantially zeroed；
After measuring cylinder touches liquid level, due to the effect of buoyancy, the pulling force detected in tension sensor will be unexpected
Become smaller；Video camera is read out oil dipstick reading；As the continuation of dipstick is to decentralization, the reason of because of buoyancy, pulling force is passed
The pulling force detected on sensor can become also to come smaller；
After measuring cylinder is totally immersed into liquid level, the variation of the pulling force detected in tension sensor will become smaller suddenly；It takes the photograph
Camera is read out oil dipstick reading；
According to video camera reading as a result, image processing module carries out identifying processing to data, controller is former according to measurement
The method described in reason is handled, and finally shows the result of the storage tank density of measurement by the tank on display；
Continue to transfer in measuring cylinder, be immersed in subsurface any position, the small pulling force that tension sensor detects becomes
Change, just will detect that the minor change of fluid density of the fluid to be measured on different height position accordingly.
Secondly, about level gauging:
A kind of that variable tension and image recognition technology is taken to measure the detection method of tank level, steps are as follows:
After detection device receives the order for starting detection, video camera is to the oil dipstick for imaging machine testing base position first
Reading is read out；
Controller control oil dipstick folding and unfolding wheel rotates clockwise, by oil dipstick slowly to decentralization, in measuring cylinder not in contact with arriving
When liquid level, tension sensor only experiences the pulling force (such as 4400 grams) of the weight generation of measuring cylinder and oil dipstick；This pulling force is big
In the control target value (such as 3800 grams, B. level gauging) in measuring principle of constant force, controller is continued to oil dipstick
To decentralization；After measuring cylinder touches liquid level, due to the effect of buoyancy, the pulling force in tension sensor will become smaller and smaller；
Until the pulling force in tension sensor is close to the control target value (3800 grams) of constant force, controller will be to oil dipstick folding and unfolding wheel
More accurate rotation control is done, until the pulling force in tension sensor reaches control target value；
After stabilization, video camera is read out the oil dipstick reading of camera shooting machine testing base position again；
According to video camera reading as a result, image processing module carries out identifying processing to data, controller is former according to measurement
The method described in reason is handled, and finally shows the result of the tank level of measurement by the tank on display.
The invention takes variable tension and image recognition technology to measure the detection device of storage tank density, liquid level, and structure is closed
Reason, layout are exquisite；Precise measurement very easily can be carried out to the density in storage tank；The method for using variable tension simultaneously, In
When measuring tank level, the control strategy of variable tension is used to the tension of oil dipstick, is automatically performed the liquid level to material in tank
The detection of height；The work that the dipping of artificial detection storage tank liquid liquid level can be replaced, alleviate operator labor intensity and
Operating risk improves the automatic collection and Accurate Determining of measurement data；Reduce the uncertainty that the artificial error of observation generates；
With initiative good technical effect.
Claims (5)
1. a kind of take variable tension and image recognition technology to measure the detection device of storage tank density, liquid level, it is characterised in that: packet
Include measuring cylinder (1), oil dipstick (2), directive wheel (3), tension sensor (4), small directive wheel (5), oil dipstick folding and unfolding wheel (6), machine
Case (7), video camera (8), guide wheel bracket (9), stepper motor (10), magnetic coupling (11), controller (12), oil dipstick are received
Put wheel support (13), signal control line (14), diffuser assembly (15), signal wire (16)；
The cabinet (7) is explosion-proof stainless steel cabinet, is equipped with the through hole of oil dipstick (2) in lower end；With diffuser assembly (15)
It is connected as one, and is connected in storage tank detection hole position；Storage tank detection hole flange face position is artificial detection base position；
The diffuser assembly (15) is equipped with the cylinder-like structure body of diffusion drainage hole, and middle part is equipped with oil dipstick from top to bottom
(2) through hole；
Oil dipstick folding and unfolding wheel (6), small directive wheel (5), directive wheel (3) are equipped in the cabinet (7)；The oil dipstick folding and unfolding wheel
Bracket (13) is arranged in 7 internal side wall of cabinet, and oil dipstick folding and unfolding wheel (6) is mounted on oil dipstick folding and unfolding wheel support (13)；Institute
It states small directive wheel (5) setting and is connected to cabinet in the left side top position of oil dipstick folding and unfolding wheel (6), and by small guide wheel bracket
(7) in internal side wall；The directive wheel (3) is arranged in the left side top position of small directive wheel (5), is mounted on guide wheel bracket
(9) on, suspension is connected on the inner wall of cabinet (7) on guide wheel bracket (9)；
The oil dipstick (2) is the stainless steel measurement oil dipstick produced by measurement certification producer, and bottom end is fixedly connected on measurement
On cylinder (1)；The measuring cylinder (1) is hollow stainless steel cylindrical body, and when measuring state is hung vertically in the inside of storage tank；
The oil dipstick (2) is pierced by by storage tank detection hole upwards from measuring cylinder (1), by passing through on diffuser assembly (15)
Hole, it is inner into cabinet (7), it turns back downwards by directive wheel (3), the oil dipstick (2) of directive wheel (3) two sides is parallel to each other；
Then the left side through too small directive wheel (5) is extended to the right on oil dipstick folding and unfolding wheel (6), the other end amount of being fixedly connected on oil
On ruler folding and unfolding wheel (6)；
The stepper motor (10) is rotated by magnetic coupling (11) driving oil dipstick folding and unfolding wheel (6), and by controller (12)
Pass through the revolving speed and positive and reverse steering of signal control line (14) control oil dipstick folding and unfolding wheel (6)；
Tension sensor (4) are equipped on the guide wheel bracket (9), are connected on controller (12) by signal wire (16)；
Video camera (8) are equipped in the directive wheel (3) leftward position, for shooting the scale value read on oil dipstick (2)；Camera shooting
The installation site of machine (8) is camera shooting machine testing base position；
The detection device further includes image processing module, tank side display；Video camera (8) shooting is read on oil dipstick (2)
Scale value is identified by image processing module, then passes through the processing of controller (12), is shown in by tank on display；It is aobvious by tank
Show that device is arranged on the height and position being manually easily observe that.
2. the detection according to claim 1 for taking variable tension and image recognition technology to measure storage tank density, liquid level is set
It is standby, it is characterised in that: the diffuser assembly (15) is by connecting flange (1501), closed section (1502), closed section top
(1503), drainage hole (1504) are spread, gasket (1505), waterproof cover (1506), waterproof platform (1507), gasket fixing bolt
(1508) it forms；
The connecting flange (1501) is connected in the detection hole of storage tank, and connecting flange (1501) is equipped with closed section (1502),
The upper end of closed section (1502) is connected at the top of closed section (1503), forms the inner cavity of opposing seal；
Gasket (1505) is linked together by gasket fixing bolt (1508) under (1503) at the top of the closed section；
(1503) medium position is equipped with waterproof platform (1507) at the top of the closed section；
At the top of the closed section at the upper surface of (1503) cylinder, it is equipped at intervals with multistage diffusion drainage hole (1504)；
Upper in diffusion drainage hole (1504) is equipped at least two layers of waterproof cover (1506), and the waterproof cover (1506) is to have one
Determine the waterproof cover of conical shape.
3. the detection according to claim 1 for taking variable tension and image recognition technology to measure storage tank density, liquid level is set
It is standby, it is characterised in that: the tension sensor (4) is the explosion-proof type pull sensing by high-precision corrugated stainless steel tubing welded seal
Device.
4. the detection according to claim 1 for taking variable tension and image recognition technology to measure storage tank density, liquid level is set
It is standby, it is characterised in that: the directive wheel (3), small directive wheel (5), oil dipstick folding and unfolding wheel (6) are the metal with graphite bushing
Wheel.
5. the detection according to claim 1 for taking variable tension and image recognition technology to measure storage tank density, liquid level is set
It is standby, it is characterised in that: the guide wheel bracket (9), oil dipstick folding and unfolding wheel support (13) and small guide wheel bracket are metal material
The bracket of matter.
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| CN201920742324.0U CN209689707U (en) | 2019-05-22 | 2019-05-22 | It is a kind of that variable tension and image recognition technology is taken to measure the detection device of storage tank density, liquid level |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110044438A (en) * | 2019-05-22 | 2019-07-23 | 南京挚信软件技术有限责任公司 | It is a kind of that variable tension and image recognition technology is taken to measure the detection device and detection method of storage tank density, liquid level |
| CN111024188A (en) * | 2019-12-10 | 2020-04-17 | 东南大学 | Deep foundation pit underground water level measuring device and method based on single chip microcomputer |
-
2019
- 2019-05-22 CN CN201920742324.0U patent/CN209689707U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110044438A (en) * | 2019-05-22 | 2019-07-23 | 南京挚信软件技术有限责任公司 | It is a kind of that variable tension and image recognition technology is taken to measure the detection device and detection method of storage tank density, liquid level |
| CN111024188A (en) * | 2019-12-10 | 2020-04-17 | 东南大学 | Deep foundation pit underground water level measuring device and method based on single chip microcomputer |
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| TR01 | Transfer of patent right |
Effective date of registration: 20210402 Address after: 210000 room 105, building 26, No.8 Xinghai Road, Qinhuai District, Nanjing City, Jiangsu Province Patentee after: Zheng Ximin Address before: 211106 Room 101, building 12, J6 software Creative Park, 6 Jiangjun Road, Jiangning District, Nanjing City, Jiangsu Province Patentee before: Nanjing Zhengxin Software Technology Co.,Ltd. |