CN104444944A - Radiation source lifting mechanism and X-ray foreign matter detection device with same - Google Patents
Radiation source lifting mechanism and X-ray foreign matter detection device with same Download PDFInfo
- Publication number
- CN104444944A CN104444944A CN201410839255.7A CN201410839255A CN104444944A CN 104444944 A CN104444944 A CN 104444944A CN 201410839255 A CN201410839255 A CN 201410839255A CN 104444944 A CN104444944 A CN 104444944A
- Authority
- CN
- China
- Prior art keywords
- synchronous pulley
- lifting mechanism
- lifter plate
- foreign matter
- radiographic source
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/10—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks
- B66F7/12—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by mechanical jacks
- B66F7/14—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by mechanical jacks screw operated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/28—Constructional details, e.g. end stops, pivoting supporting members, sliding runners adjustable to load dimensions
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
Abstract
The invention discloses a radiation source lifting mechanism which comprises a drive motor, a lifting plate, guide mechanisms and lead screw transmission mechanisms. A radiation source is fixed to the lifting plate. The guide mechanisms limiting the lifting plate to only move up and down are arranged on the four corners of the lifting plate respectively. The drive motor drives the lead screw transmission mechanisms. The lifting plate is connected with the lead screw transmission mechanisms. The invention further discloses an X-ray foreign matter detection device with the radiation source lifting mechanism. The radiation source lifting mechanism and the X-ray foreign matter detection device with the radiation source lifting mechanism have the advantages that the resolution of a system does not change along with the different thicknesses of objects by adjusting the height of the radiation source in real time, so that the optimal resolution can be kept all the time, and the effect of precisely detecting foreign matter is achieved.
Description
Technical field
The present invention relates to foreign material detecting technique field, particularly relate to radiographic source lifting mechanism and there is its X-ray detection device for foreign matter.
Background technology
X-ray foreign bodies detection machine principle of work: utilize X-ray different to the through characteristic of different material, detect and be mixed in the larger foreign matter of bulk cargo Midst density, as metal, glass, stone etc., then rejected by device for eliminating.
The radiographic source of current X-ray equipment and detector position are all generally fixing, radiographic source height depends on the object width that will irradiate substantially, detector is generally below transport tape, this passes through equipment with regard to causing the object when different-thickness, actual resolution (amplification) rate of system is changing, and cannot ensure near optimal value.
Summary of the invention
One of technical matters to be solved of the present invention is that providing a kind of ensures that the resolution of system is not along with the radiographic source lifting mechanism that the thickness difference of object changes.
Two of technical matters to be solved of the present invention is to provide a kind of X-ray detection device for foreign matter with above-mentioned radiographic source lifting mechanism.
The present invention one of solves the problems of the technologies described above by the following technical solutions: a kind of radiographic source lifting mechanism, comprise drive motor, lifter plate, guiding mechanism, lead-screw drive mechanism, radiographic source is fixed on lifter plate, the uniform guiding mechanism that lifter plate can only be moved up and down in the corner of described lifter plate, described drive motor drives lead-screw drive mechanism, and lifter plate connects lead-screw drive mechanism.
As the technical scheme optimized, described lead-screw drive mechanism has two groups, is arranged symmetrically in the both sides of lifter plate respectively, and be arranged symmetrically with two groups of each parameters of lead screw are completely the same.
As the technical scheme optimized, described lifting mechanism also comprises the first synchronous pulley, first Timing Belt, second synchronous pulley, second Timing Belt, 3rd synchronous pulley, often organize lead-screw drive mechanism and comprise lead screw and nut, the position of the corresponding lead screw of described lifter plate offers through hole, described nut and this through hole are coaxially fixed on lifter plate, the below of described lead screw is fixed on thrust bearing, thrust bearing is fixed on the substrate of X-ray detection device for foreign matter, fastening first synchronous pulley on the output shaft of drive motor, bottom fastening second synchronous pulley respectively of two lead screw, 3rd synchronous pulley, connected by the first Timing Belt between first synchronous pulley and the second synchronous pulley, connected by the second Timing Belt between second synchronous pulley and the 3rd synchronous pulley.
As the technical scheme optimized, described drive motor is fixed on electric machine support, and electric machine support is fixed on substrate.
The present invention solve the problems of the technologies described above by the following technical solutions two: provide a kind of X-ray detection device for foreign matter comprising radiographic source lifting mechanism described in above-mentioned either a program.
The invention has the advantages that: by adjusting radiogenic height in real time, making the resolution of system not along with the thickness difference of object changes, remaining optimal resolution, reach the effect accurately detecting foreign matter.
Accompanying drawing explanation
Fig. 1 is x-ray imaging principle schematic.
Fig. 2 adds the later x-ray imaging principle schematic of upper conveyor belt.
The structure of the light curtain measuring thickness device that Fig. 3 provides for the embodiment of the present invention and using state schematic diagram thereof.
The x-ray source electricity mechanism structure schematic diagram that Fig. 4 provides for the embodiment of the present invention.
The x-ray source lifting mechanism structural representation that Fig. 5 provides for the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in detail.
As shown in Figure 1, X-ray detecting equipment comprises radiographic source 1, detector 2, and radiographic source 1 and detector 2 lay respectively at the upper and lower of checking matter 3, theoretical according to x-ray imaging, the system amplification rate of X-ray detecting equipment
be defined as:
（1）
for radiographic source 1 is to the distance of detector 2,
for radiographic source 1 is to the distance of checking matter 3 height center.
Further refinement, checking matter 3 passes through to be transmitted by belt conveyor 4, as shown in Figure 2, now, amplification rate
for:
（2）
Wherein,
for radiographic source 1 is to the distance of belt conveyor 4,
for belt conveyor 4 is to the distance of detector 2,
for the thickness of checking matter 3.
Current science proves, optimum amplification rate
(making object imaging quality optimum) is:
（3）
Wherein,
for the focal spot size of radiographic source 1,
for the resolution of detector 2.
For an X-ray detecting equipment,
with
be all fixing, also namely the optimum amplification rate of system is certain.
For solving the problem that existing systemic resolution changes according to the thickness difference of checking matter 3, according to aforementioned theory, the applicant proposes a kind of scheme, according to the thickness of checking matter 3, real-time adjustment radiographic source 1 height (keeping detector 2 invariant position), makes real system amplification rate reach or farthest near optimum amplification rate.
Order
Then
(4)
When equipment is in zero load, then radiographic source 1 is to the initialization distance of belt conveyor 4
for:
（5）
The prerequisite that above-mentioned distance is arranged will select the radiographic source 1 of a suitable dispersion angle, to guarantee detection width.
Obviously, when thickness is
checking matter 3 will when X-ray detecting equipment detects, then radiographic source 1 change in location
for:
（6）
for negative value, then illustrate that the position of radiographic source 1 will be raised.
Based on above analysis, the X-ray detection device for foreign matter of a kind of resolution optimum that the applicant provides, shown in Fig. 3 and Fig. 4, the X-ray detection device for foreign matter of described resolution optimum comprises radiographic source 10, detector (not shown), belt conveyor 30, measuring thickness device 40, upper computer (not shown), drive motor 50 and lifting mechanism 60.
Measured object 80 transmits on belt conveyor 30, described radiographic source 10 is positioned at the top of belt conveyor 30, be fixed on lifting mechanism 60, detector is positioned at the below of belt conveyor 30, receive the signal that radiographic source 10 sends, drive motor 50 and lifting mechanism 60 are arranged on the substrate 70 of X-ray detection device for foreign matter, described measuring thickness device is arranged on belt conveyor 30 both sides of the entrance of X-ray detection device for foreign matter, upper computer is connected with described measuring thickness device 40 and described drive motor 50, and drive motor 50 drives lifting mechanism 60.
Concrete, described measuring thickness device 40 adopts light curtain measurement mechanism, comprise one group of photoemitter 42 positioned opposite to each other and receptor 44, photoemitter 42 and receptor 44 are fixed on belt conveyor support 32, the signal that receptor 44 generates for receiving photoemitter 42, thus obtain the thickness of measured object 80.
Certainly, as required, the both sides of belt conveyor 30 also can arrange many group photoemitters 42 and receptor 44.
The light that photoemitter 42 emits is equally spaced, minimum spacing i.e. survey precision.When do not have measured object 80 by between photoemitter 42 and receptor 44 time, receptor 44 receives the optical signal that photoemitter 42 sends over completely.When have measured object 80 by between them time, then have some light and intercepted by measured object 80, receptor 44 can only receive the light be not blocked.Receptor 44 calculates by the light number stopped, is multiplied by the spacing of light, is measured object height, and this height parameter is uploaded to upper computer.
Upper computer obtains measured object 80 thickness parameter
after, according to radiographic source change in location computing formula (6), the displacement of radiographic source 10 relative to current location can be determined.
Described drive motor 50 can be fixed on X-ray detection device for foreign matter, as on the substrate 70 of X-ray detection device for foreign matter, the position that other are easy to operate can certainly be fixed on, substrate 70 is provided with the opening that X-ray light beam 12 that x-ray source 10 is generated passes through, X-ray light beam 12 arrives through this opening the detector be arranged on below belt conveyor 30, thus forms the image of measured object 80.
Upper computer sends to drive motor 50 by calculating the displacement parameter obtained, and drives lifting mechanism 60 to drive x-ray source 10 to move up and down, towards or away from detector, be finally in optimal imaging position by drive motor 50.
Described drive motor 50 can for conventional motor, and those skilled in the art can expect not paying creative work, is not repeating at this.
As technical scheme more specifically, as shown in Figure 5, for the structural representation of lifting mechanism 60 of the present invention, described lifting mechanism 60 comprises lifter plate 61, guiding mechanism 62, lead-screw drive mechanism 63, first synchronous pulley 64, first Timing Belt 65, second synchronous pulley 66, second Timing Belt 67, the 3rd synchronous pulley 68.
Described X-ray is penetrated source 10 and is fixed on lifter plate 61, the uniform guiding mechanism 62 in corner of lifter plate 61, often organize guiding mechanism 62 to be made up of the axis of guide 622 and sliding sleeve 624, the corner of lifter plate 61 offers through hole (figure does not indicate), described sliding sleeve 624 arranges in through-holes, and the lower end of the described axis of guide 622 is fixed on the substrate 70 of X-ray detection device for foreign matter, and upper end is through described sliding sleeve 624, due to the position-limiting action of sliding sleeve 624, guiding mechanism 62 makes lifter plate 61 move up and down.
Moving up and down of lifter plate 61 is realized by two of the both sides being arranged symmetrically in lifter plate 61 groups of lead-screw drive mechanisms 63, often organize lead-screw drive mechanism 63 and comprise lead screw 632 and nut 634, and be arranged symmetrically with two groups of each parameters of lead screw 632 are completely the same, the lead angle of lead screw 632 is less than friction angle, there is self-locking action, the position of the corresponding lead screw 632 of described lifter plate 61 offers through hole (not shown), described nut 634 is coaxially fixed on lifter plate 61 with this through hole, one of ordinary skill in the art can be understood easily, described nut 634 can be fixed on the top of lifter plate 61, also the below of lifter plate 61 can be fixed on, the below of described lead screw 632 is fixed on thrust bearing 636, thrust bearing 636 is fixed on the substrate 70 of X-ray detection device for foreign matter.
Fastening first synchronous pulley 64 on the output shaft of drive motor 50, bottom fastening second synchronous pulley 66 respectively of two lead screw 632, 3rd synchronous pulley 68, connected by the first Timing Belt 65 between first synchronous pulley 64 and the second synchronous pulley 66, connected by the second Timing Belt 67 between second synchronous pulley 66 and the 3rd synchronous pulley 68, drive motor 50 rotates, the first synchronous pulley 64 is driven to rotate, and then drive the second synchronous pulley 66 and the 3rd synchronous pulley 68 to rotate, thus make power be sent to lead screw 632, the rotation of lead screw 632 drives the lifting of lifter plate 61.The two groups of each parameters of lead screw 632 be arranged symmetrically with are completely the same, thus make the heave amplitude of lifter plate 61 both sides completely the same, reach pulsation-free lifting effect.
Described drive motor 50 is fixed on electric machine support 52, electric machine support 52 is fixed on substrate 70, described substrate 70 is provided with the opening that X-ray light beam 12 that x-ray source 10 is generated passes through, X-ray light beam 12 arrives through this opening the detector be arranged on below belt conveyor 30, thus forms the image of measured object 80.
As the scheme optimized, the light hole place in described x-ray source 10 is provided with calimator 69, for the width of about beam X-ray, inside described second Timing Belt 67 wraps in calimator 69.
Whole x-ray source position self-regulation comprises following step:
Step 1, light curtain thickness measuring:
Measure and store the thickness parameter of measured object 80, the measurement mechanism of the thickness of measured object 80 can use measuring thickness device 40 as above, thickness parameter
after measuring, be uploaded to upper computer;
Step 2, position calculation:
Upper computer obtains measured object thickness parameter
after, according to the position calculation formula (6) of above-mentioned radiographic source 10, the displacement of radiographic source 10 relative to current location can be determined;
Step 3, perform location:
The radiographic source 10 determined according to step 2 is relative to the displacement of current location, the position of radiographic source 10 is regulated to make it and above-mentioned displacement field match, to reach the object obtaining good resolution, the position adjustments of radiographic source 10 is realized by above-mentioned drive motor 50 and lifting mechanism 60.
Use the present invention effectively can improve resolution.
Said method is only applicable to the detection of the basically identical measured object of thickness 80.
The foregoing is only the preferred embodiment of the invention; not in order to limit the invention; the any amendment done within all spirit in the invention and principle, equivalently to replace and improvement etc., within the protection domain that all should be included in the invention.
Claims (5)
1. a radiographic source lifting mechanism, it is characterized in that: comprise drive motor (50), lifter plate (61), guiding mechanism (62), lead-screw drive mechanism (63), radiographic source (10) is fixed on lifter plate (61), the uniform guiding mechanism (62) that lifter plate (61) can only be moved up and down in the corner of described lifter plate (61), described drive motor (50) drives lead-screw drive mechanism (63), and lifter plate (61) connects lead-screw drive mechanism (63).
2. a kind of radiographic source lifting mechanism according to claim 1, it is characterized in that: described lead-screw drive mechanism (63) has two groups, be arranged symmetrically in the both sides of lifter plate (61) respectively, and be arranged symmetrically with two groups of each parameters of lead screw (632) are completely the same.
3. a kind of radiographic source lifting mechanism according to claim 2, it is characterized in that: described lifting mechanism also comprises the first synchronous pulley (64), first Timing Belt (65), second synchronous pulley (66), second Timing Belt (67), 3rd synchronous pulley (68), often organize lead-screw drive mechanism (63) and comprise lead screw (632) and nut (634), the position of the corresponding lead screw (632) of described lifter plate (61) offers through hole, described nut (634) and this through hole are coaxially fixed on lifter plate (61), the below of described lead screw (632) is fixed on thrust bearing (636), thrust bearing (636) is fixed on the substrate (70) of X-ray detection device for foreign matter, fastening first synchronous pulley (64) on the output shaft of drive motor (50), bottom fastening second synchronous pulley (66) respectively of two lead screw (632), 3rd synchronous pulley (68), connected by the first Timing Belt (65) between first synchronous pulley (64) and the second synchronous pulley (66), connected by the second Timing Belt (67) between second synchronous pulley (66) and the 3rd synchronous pulley (68).
4. a kind of radiographic source lifting mechanism according to claim 1, is characterized in that: described drive motor (50) is fixed on electric machine support (52), and electric machine support (52) is fixed on the substrate (70) of X-ray detection device for foreign matter.
5. an X-ray detection device for foreign matter, is characterized in that, comprises the radiographic source lifting mechanism as described in any one of claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410839255.7A CN104444944B (en) | 2014-12-30 | 2014-12-30 | A kind of radiographic source elevating mechanism and there is its X-ray detection device for foreign matter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410839255.7A CN104444944B (en) | 2014-12-30 | 2014-12-30 | A kind of radiographic source elevating mechanism and there is its X-ray detection device for foreign matter |
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| Publication Number | Publication Date |
|---|---|
| CN104444944A true CN104444944A (en) | 2015-03-25 |
| CN104444944B CN104444944B (en) | 2016-11-30 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105043419A (en) * | 2015-08-04 | 2015-11-11 | 北京控制工程研究所 | X-ray pulsar navigation sensor on-orbit calibration radiation source |
| CN105540490A (en) * | 2016-02-03 | 2016-05-04 | 中国原子能科学研究院 | Jacking device |
| EP3178773A1 (en) * | 2015-12-10 | 2017-06-14 | Nuctech Company Limited | Mobile radiographic inspection system and lifting device for mobile radiographic inspection system |
| CN107381427A (en) * | 2017-07-20 | 2017-11-24 | 安徽巨自动化装备有限公司 | One kind is accurately positioned hoisting mechanism |
| CN110987973A (en) * | 2019-11-01 | 2020-04-10 | 陕西众策网络科技发展有限公司 | X-ray product quality detection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110987973A (en) * | 2019-11-01 | 2020-04-10 | 陕西众策网络科技发展有限公司 | X-ray product quality detection device |
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