CN101629840A - Mobile measuring instrument and measuring method of material level in storage warehouse - Google Patents
Mobile measuring instrument and measuring method of material level in storage warehouse Download PDFInfo
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- CN101629840A CN101629840A CN200910012182A CN200910012182A CN101629840A CN 101629840 A CN101629840 A CN 101629840A CN 200910012182 A CN200910012182 A CN 200910012182A CN 200910012182 A CN200910012182 A CN 200910012182A CN 101629840 A CN101629840 A CN 101629840A
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- cask flask
- detector
- storage warehouse
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- storing storehouse
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Abstract
The invention discloses a mobile measuring instrument and a measuring method of the material level in a storage warehouse. The rear part of a collimating hole of a shielding container is equipped with a gamma-ray source rotating block, a detector is fixed on the shielding container, a lifting device is installed on the shielding container, and a transmission signal cable of the detector is connected with a host. The method for measuring the material level in the storage warehouse is as follows: the shielding container moves form the bottom part of the storage warehouse to the top part of the storage warehouse, the host constructs a planar curve graph according to the counting rate transmitted by the detector in real time, wherein, the horizontal axis is the counting rate, and the vertical axis is the movable height of the shielding container, the state and the property of the material in the storage warehouse are analyzed and judged according to the curve. The measuring instrument has simple structure and easy operation, can be installed on a movable dolly, or is broken into several blocks to be reassembled in different places, thereby measuring different storage warehouses. An instrument of measuring equipment can measure a plurality of storage warehouses, thereby saving a great amount of cost and having high measuring efficiency.
Description
Technical field:
The present invention relates to a kind of measurement instrument, is the measurement instrument of height of materials in a kind of contactless storing storehouse specifically.
Technical background:
At numerous areas such as cement, chemical industry, metallurgy, large-scale storing storehouse all is the optimal selection of depositing standby material.But large-scale storing warehouse is long-pending huge, even some need be airtight, is very loaded down with trivial details something by manually monitoring for the storing situation in the storehouse therefore.The level-sensing device that a variety of measuring principles and mode have been arranged at present, but all be fixed, promptly in case after installing, just can only be placed in this point for a long time, these conventional transmission-type one-point measurements can only detect at the variation of the height of materials in this point of fixity respective range, can't measure to the controlling level in a plurality of storings storehouse and with whole in the storing storehouse or local variable density.For some the storing storehouses that needn't monitor in real time, not only increase cost at level-sensing device of all corresponding installation of each check point, and increased the workload of safeguarding.
Common transmission-type one-point measurement there is no need height of materials or density in the storing storehouse are calculated, and does not have simple and practical measuring method available as yet at present.
Summary of the invention:
Measure the problem that exists at aforementioned material level in storage warehouse, the invention provides that a kind of convenience moves, easy and simple to handle, visual result, different storings storehouse carried out the instrument of materials inside state-detection.
Solving the concrete technical measures that above-mentioned existing problems adopt is:
According to Compton-Wu the instruction scattering effect is arranged, when gamma-rays and material are had an effect, Compton scattering can take place, and when scattering angle fixedly the time, then the intensity of scattered ray is only relevant with the density of material.From outside, storing storehouse irradiation is carried out in inside with gamma-rays, gamma-rays sees through behind the bulkhead by thing scattering in the storehouse, receive gamma-rays after the scattering with detector, if the material density in the storing storehouse changes, then respective change also can take place in the intensity of the received scattered of detector.
Like this, as long as the relative position of assurance gamma ray projector and detector and constant to the distance and the angle of radiation of storing bulkhead, along storing bulkhead moving from bottom to top, according to the situation of change that detector received to scattered, the variable density situation that becomes sky or material in the storing storehouse wherein be can judge, and then height of materials and variable density in the storing storehouse learnt.
According to above-mentioned principle, a kind of portable measurement instrument and measuring method of material level in storage warehouse, it is characterized in that: have an oblique fan-shaped collimating aperture at cask flask, a spill spin block is equipped with at the collimating aperture rear portion, gamma ray projector is placed in spill spin block inside, the stationkeeping that has a level height with spill spin block of opposite side has detector in cask flask, and the cask flask jacking gear is housed on cask flask, and detector transmission signals cable connects main frame.
By cask flask gamma ray projector and detector are fixed, make the relative position of gamma ray projector and detector can not change, and the gamma-rays that gamma ray projector sends can't shine directly on the detector.In use, whole cask flask under the transmission of motor, from bottom to top along the guide rail uniform motion.
Guide rail can be perpendicular to ground, also can be to press from both sides an inclination angle arbitrarily with ground, as long as guarantee parallel with the storing bulkhead and enough approaching.Can adapt to like this is the various storings storehouse of vertical wall or inclined wall.
Cask flask has an oblique fan-shaped collimating aperture, and a spill spin block is equipped with at the collimating aperture rear portion, and gamma ray projector is placed in spill spin block inside.The rotation of this spill spin block can manually be controlled, and perhaps realizes spinning movement by drive of motor, by the rotation of spill spin block, whether realizes gamma ray projector to positively biased fan-shaped collimating aperture, thereby realizes that can the restriction gamma-rays give off cask flask.
Make cask flask be positioned at storing storehouse bottom position earlier together with gamma ray projector and detector, provide power supply to detector then, detector is started working, rotate the spill spin block that gamma ray projector is housed simultaneously, the gamma-rays that makes gamma ray projector send can radiate from cask flask, shines to the storing storehouse.Be detected device by the gamma-rays after the material scattering and receive, be converted into electronic signal transmission and give main frame.
The material level in storage warehouse measuring method is: starter motor makes cask flask bottom-uply at the uniform velocity mobile from storing storehouse bottom position along guide rail, tip position until the storing storehouse, it is time zero that cask flask is positioned at that storing storehouse bottom position begins when mobile, the counting rate that main frame transmits in real time according to detector is plane curve figure, horizontal ordinate is the counting rate of corresponding detector among the figure, ordinate is the traveling time of corresponding cask flask and the product of translational speed, it is the height that cask flask moves, after treating that cask flask moves to the tip position in storing storehouse, the control motor stops operating, main frame is drawn plane curve figure end simultaneously, according to the curve condition among the figure material state in the storing storehouse and character are carried out analysis and judgement: the horizontal ordinate counting rate sharply diminishes in plane curve figure, highly is the material level in storage warehouse height shown in the ordinate corresponding with it; When break big or that diminish appears becoming in the horizontal ordinate counting rate, represent that then material is the material of two kinds of different densities in the storing storehouse.
Beneficial effect of the present invention: in whole measuring process, can come the integral body or the part in storing storehouse are measured by reference position and the end position that the adjustment cask flask moves.Can also realize the translational speed of cask flask is controlled by regulating rotating speed of motor, realize rough measure or careful measurement.Than conventional method, earlier the coarse scan measurement is carried out in whole storing storehouse, and then careful scanning is carried out in the local key area in storing storehouse with slower translational speed with translational speed faster, make measurement more efficient.
Instrument configuration of the present invention is simple, operates simple and easyly, and can be installed on the movable trolleys, perhaps resolves into several, reformulates in the strange land, and different storing storehouses is measured.A measuring equipment instrument can be measured a plurality of storings storehouse, saves a large amount of costs.
Description of drawings
Fig. 1 structural representation of the present invention
A kind of drive structure of gear worm synoptic diagram in Fig. 2 embodiment
A kind of crawler belt drive mechanism synoptic diagram in Fig. 3 embodiment
The design sketch of the actual use of Fig. 4 measurement result data
Among the figure: 1 cask flask, 2 detectors, 3 collimating apertures, 4 rotary bodies, 5 gamma ray projectors, 6 cable aperture, 7 two " recessed " shape guide rails, 8 motors, 9 leading screws, 10 crawler belts.
Embodiment
Accompanying drawings structure of the present invention and use measuring method.
A kind of portable measurement instrument of measuring material level in storage warehouse, as shown in Figure 1.
In cask flask 1, a side is equipped with detector 2, and the position behind detector 2 has cable aperture 6.Opposite side at cask flask 1 has tiltedly fan-shaped collimating aperture 3.In the back of collimating aperture 3, rotary body 4 is housed, the rotation of rotary body can also can be controlled by electric automatization by manually realizing.Side at rotary body 4 is equipped with gamma ray projector 5.Can select the kind and the activity of suitable gamma ray projector according to the character of thing in the material of the volume in storing storehouse, bulkhead and thickness, the storehouse etc.If select the isotope radioactive source for use, what can select for use is
241Am,
237Cs,
60Co, but be not only these three kinds, range-of-motion is generally within the scope of 5 millicurie to 100 millicuries.By the rotation of rotary body 4, can make gamma ray projector 5 align collimating aperture 3, perhaps deviate from collimating aperture 3.When gamma ray projector 5 aligned collimating aperture 3, gamma-rays can be along the constraint outgoing of collimating aperture 3; When gamma ray projector 5 deviated from collimating aperture 3, gamma-rays then can't penetrate from cask flask 1.And because the effect of cask flask 1, in any case, the gamma-rays that gamma ray projector 5 is sent all can't direct radiation to detector 2, detector is a crystal counter, generally select the NaI crystal counter for use, the signal amplification circuit of built-in routine and amplitude discriminator single track circuit make the electronic signal correspondence of detector output the scattered intensity that receives.
The cask flask jacking gear that cask flask 1 slides is in a conventional manner, and the transmission by motor 8 realizes that the mode of specific implementation can have multiple, below only introduces two kinds, but actual attainable mode is not limited in these two kinds:
Mode shown in Figure 2 is, motor 8 drives leading screw 9 by the worm and gear transmission and rotates, and leading screw 9 passes through screw-threaded engagement with cask flask 1.Like this, by the rotation direction and the speed of control motor 8, just can realize controlling the moving direction and the speed of cask flask 1.
Mode shown in Figure 3 is, cask flask 1 is directly fixing with crawler belt 10, and motor 8 rotates, and drags cask flask 1 slip by crawler belt 10.Can control the rotation direction and the speed of motor 8, realize controlling the moving direction and the speed of cask flask 1.
When the storing storehouse was measured, method and process were as follows:
With cask flask 1 and two " recessed " shape guide rails 7, to put to the position in as far as possible close storing storehouse, collimating aperture 3 is towards the storing storehouse.By adjusting, make two " recessed " shape guide rails 7 keep parallel with the storing bulkhead, and consistent to the distance of storing bulkhead.
The rotation of control motor 8 is adjusted cask flask 1 correspondence and storing storehouse bottom position.Turn rotary body 4 makes gamma ray projector 5 align collimating aperture 3, and the gamma-rays that gamma ray projector 5 sends is along the constraint outgoing of collimating aperture 3.The scattering of gamma-rays part storage bulkhead, a part are passed in storing bulkhead and the storehouse thing and are had an effect, and by thing scattering in the storehouse, the gamma-ray part of thing scattering is detected device 2 and receives in storage bulkhead and the storehouse.When the character of thing in the storehouse changed, then the intensity of the scattered that receives of detector 2 can change thereupon.Particularly when in the storing bulkhead during no material, then detector 2 can only receive the gamma-rays of storing bulkhead scattering, and transmitted intensity can obviously reduce when material is arranged.The signal amplification circuit of detector 2 built-in routines and amplitude discriminator single track circuit, the electronic signal that makes detector 2 output is transferred to main frame with the form of counting rate, the size of counting rate then corresponding the scattered intensity that receives.
After the scanning, judge that according to the counting rate situation of change in the curve this time point detector scans the situation of material in the storing storehouse, position.Generally, when counting rate reduces rapidly, then illustrate to become empty in the storing storehouse.
Fig. 4 is that physical property changes corresponding relation synoptic diagram with the Detector count rate curve map in the storing storehouse.The left side be a storing storehouse synoptic diagram among the figure, and the storing bulkhead is the thick corrosion resistant plate of 5mm, in adorn two kinds of materials, lower floor is a cement slurry, the upper strata is a fine iron breeze, goes up to be sky again.The right side is the curve map that main frame is done among the figure, wherein ordinate is the traveling time of cask flask 1 and the product of translational speed, the position that actual corresponding this time point gamma-rays is scanned, horizontal ordinate then receive the counting rate of scattered intensity for the correspondence of detector 2 outputs of this time.
As can be seen from Figure 4, in the scanning process, when becoming fine iron breeze by cement slurry in the storing storehouse, because material density becomes big, corresponding curve also begins the occurrence count rate and becomes big break, i.e. B point; And when becoming sky by fine iron breeze, owing to lacked the scattering of material, detector 2 can only receive the gamma-rays of storing bulkhead scattering, so counting rate sharply diminishes, i.e. the A point.Therefore can from the variation of counting rate, tell the variation whether material and material density are arranged in the storing storehouse.
And if can determine material variety in each storing storehouse, corresponding counting rate in the time of will scanning various materials and sky then under the state is demarcated, set up the words of database, in the measurement so afterwards, as long as guarantee that each cask flask 1 is all consistent with timing signal to the distance of storing bulkhead, then can determine the details of material in the storing storehouse in detail by the counting rate of detector 2 outputs and the corresponding relation in the nominal data storehouse.
Claims (2)
1, a kind of portable measurement instrument of material level in storage warehouse, it is characterized in that: have an oblique fan-shaped collimating aperture at cask flask, a spill spin block is equipped with at the collimating aperture rear portion, gamma ray projector is placed in spill spin block inside, the stationkeeping that has a level height with spill spin block of opposite side has detector in cask flask, the cask flask jacking gear is housed on cask flask, and detector transmission signals cable connects main frame.
2, use the measuring method of the portable measurement instrument of the described a kind of material level in storage warehouse of claim 1, it is characterized in that: starter motor makes cask flask bottom-uply at the uniform velocity mobile from storing storehouse bottom position along guide rail, tip position until the storing storehouse, it is time zero that cask flask is positioned at that storing storehouse bottom position begins when mobile, the counting rate that main frame transmits in real time according to detector is plane curve figure, horizontal ordinate is the counting rate of corresponding detector among the figure, ordinate is the traveling time of corresponding cask flask and the product of translational speed, it is the height that cask flask moves, after treating that cask flask moves to the tip position in storing storehouse, the control motor stops operating, main frame is drawn plane curve figure end simultaneously, according to the curve condition among the figure material state in the storing storehouse and character are carried out analysis and judgement: the horizontal ordinate counting rate sharply diminishes in plane curve figure, highly is the material level in storage warehouse height shown in the ordinate corresponding with it; When break big or that diminish appears becoming in the horizontal ordinate counting rate, represent that then material is the material of two kinds of different densities in the storing storehouse.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910012182A CN101629840A (en) | 2009-06-23 | 2009-06-23 | Mobile measuring instrument and measuring method of material level in storage warehouse |
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| CN200910012182A CN101629840A (en) | 2009-06-23 | 2009-06-23 | Mobile measuring instrument and measuring method of material level in storage warehouse |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013189124A1 (en) * | 2012-06-19 | 2013-12-27 | Guo Yunchang | Method of determining material-level curve in continuous-type passive nucleonic level gauge |
| WO2013189125A1 (en) * | 2012-06-19 | 2013-12-27 | Guo Yunchang | Method related to determining switching point of a switch-type passive nucleonic level gauge |
| CN110108333A (en) * | 2019-04-08 | 2019-08-09 | 中联重科股份有限公司 | Material level detection method and device for stirring container |
-
2009
- 2009-06-23 CN CN200910012182A patent/CN101629840A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013189124A1 (en) * | 2012-06-19 | 2013-12-27 | Guo Yunchang | Method of determining material-level curve in continuous-type passive nucleonic level gauge |
| WO2013189125A1 (en) * | 2012-06-19 | 2013-12-27 | Guo Yunchang | Method related to determining switching point of a switch-type passive nucleonic level gauge |
| CN110108333A (en) * | 2019-04-08 | 2019-08-09 | 中联重科股份有限公司 | Material level detection method and device for stirring container |
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Open date: 20100120 |