CN2303294Y - Compton scattering nondestructive testing apparatus - Google Patents
Compton scattering nondestructive testing apparatus Download PDFInfo
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- CN2303294Y CN2303294Y CN 97218440 CN97218440U CN2303294Y CN 2303294 Y CN2303294 Y CN 2303294Y CN 97218440 CN97218440 CN 97218440 CN 97218440 U CN97218440 U CN 97218440U CN 2303294 Y CN2303294 Y CN 2303294Y
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- collimating apparatus
- detector
- compton
- compton scattering
- back collimating
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Abstract
The utility model relates to a Compton scattering nondestructive testing device, which comprises a radiation source, a front collimator, a detector, a rear collimator and a scanning movement device, wherein, the radiation source, the front collimator, the rear collimator and the detector are installed on the scanning movement device. The rear collimator is provided with as many ray channels as possible to enhance the validity of detection according to the requirements of different resolution, and the extension lines on the both ends of the ray channels respectively direct to the detector and the detected parts on a measured object. The rear collimator and the detector are arranged along the Compton scattering direction of incident ray bundles, and the rear collimator is arranged between a measured object and the detector. The utility model has the advantage of high detection sensitivity, and is favorable for simplifying the structure of the complete machine and reducing cost.
Description
The utility model relates to a kind of Compton scattering non-destructive detection device.
Nondestructive testing technique is widely used in the nondestructive examination and the Nondestructive Evaluation of industrial products, the safety detection of airport, station, harbour, customs.Traditional ray non-destructive detection device is the transmission imaging device, and its weak point is: because its radioactive source and detector must be arranged in the both sides of testee, therefore be not suitable for detecting large-sized object and complex-shaped object 1..2. signal to noise ratio (S/N ratio) is low, is not suitable for detecting gossamery object.Existing Compton backscattering technology is to utilize the backward scattering ray to survey, can effectively solve above-mentioned shortcoming, but because of its scattered ray intensity a little less than, must adopt stronger radioactive source, and be equipped with thick and heavy shield assembly, thereby cause big, the Heavy Weight of device volume, support equipment is numerous and jumbled, and cost is high and be unfavorable for rig-site utilization.In addition, its effective investigation depth also is very limited.
The purpose of this utility model is to provide a kind of Compton scattering non-destructive detection device, to realize reducing cost simplification one-piece construction, the purpose of raising signal to noise ratio (S/N ratio) and investigation depth.
The technical scheme that the utility model adopted is: this non-destructive detection device is made up of radioactive source, preceding collimating apparatus, detector, back collimating apparatus and scanister, and wherein radioactive source, preceding collimating apparatus, back collimating apparatus and detector all are installed on the scanning motion device.Collimating apparatus is located between radioactive source and the testee before described, is used for the ray that radioactive source sends is constrained to the beam of aiming at testee.The back collimating apparatus is provided with ray channel as much as possible to improve the validity that detects, the detection position on this ray channel two ends extended line difference directed towards detector and the testee by the requirement of different resolution in the utility model.Described back collimating apparatus and detector are provided with along the Compton scattering direction of incident beam, and this back collimating apparatus places between testee and the detector.The course of work of the present utility model is: the ray that radioactive source sends is through arriving the detection position in the testee after the preceding collimating apparatus, after the scattering of position, its Compton scattering line passes through to be received by detector after the collimating apparatus of back after testing.Because the ray channel in the collimating apparatus of back points to specific detection position, therefore the ray that comes out from the test section potential scattering can be by the back collimating apparatus, and other spuious ray is all masked by this back collimating apparatus, thereby guarantees the accuracy of result of detection.
Advantage of the present utility model is its detection sensitivity height, can obviously improve signal to noise ratio (S/N ratio) and detect the degree of depth, simultaneously owing to can use the low emission source to survey, thereby helps simplifying complete machine structure, reduces cost.
Below in conjunction with drawings and Examples the utility model is further described.
Fig. 1: the structural representation of first kind of embodiment of the utility model
The A-A sectional view of Fig. 2: Fig. 1
Fig. 3: the structural representation of second kind of embodiment of the utility model
Fig. 4: the structural representation of the third embodiment of the utility model
Fig. 5: the structural representation of the 4th kind of embodiment of the utility model
Fig. 6: the structural representation of the 5th kind of embodiment of the utility model
Embodiment one: the structure of this routine described Compton scattering non-destructive detection device as shown in Figure 1, 2, this device is made up of radioactive source 1, preceding collimating apparatus 2, detector 5, back collimating apparatus 4 and scanning motion device, and wherein radioactive source 1, preceding collimating apparatus 2, back collimating apparatus 4 and detector 5 all are installed on the scanning motion device.Wherein the structure of back collimating apparatus 4 is to be provided with the multi-disc grizzly bar in cone-shaped cavity, utilize the gap between each grizzly bar to constitute many ray channels, the axis of this cone-shaped cavity and each grizzly bar will be collected on the detector 5 from the Compton scattering line of check point 31 scatterings along the check point 31 in the Compton scattering direction sensing testee 3.This example extend to many cone-shaped cavities multidetector assembly.
Embodiment two: the structure of this routine described Compton scattering non-destructive detection device as shown in Figure 3, this device is made up of radioactive source 1, preceding collimating apparatus 2, detector 5, back collimating apparatus 4 and scanning motion device, and wherein radioactive source 1, preceding collimating apparatus 2, back collimating apparatus 4 and detector 5 all are installed on the described scanning motion device.Wherein back collimating apparatus 4 is made up of multi-disc taper or pyramid grid sheet, the coaxial installation of each grid sheet, and the bus of each grid sheet all points to the check point 31 in the testee 3, thereby between each grid sheet the ray channel of many annulars of formation.All along the axis setting of back collimating apparatus 4, the cone angle of back collimating apparatus 4 is corresponding with the Compton scattering angle for the straight device 2 of radioactive source 1 in this example and preceding collimation.Ray collimating apparatus 4 after the passage between each grid sheet passes through from the scattering of tested position arrives detector 5.
Embodiment three: the structure of this routine described Compton scattering non-destructive detection device as described in Figure 4, this device is made up of radioactive source 1, preceding collimating apparatus 2, detector 5, back collimating apparatus 4 and scanning motion device, and wherein radioactive source 1, preceding collimating apparatus 2, back collimating apparatus 4 and detector 5 all are installed on the described scanning motion device.Wherein the structure of back collimating apparatus 4 is to be coaxially installed with multi-disc garden awl or pyramid grid sheet in garden awl or pyramid cavity, utilize the gap between each grid sheet to constitute many ray channels, the axis of back collimating apparatus 4 is along the check point 31 in the Compton scattering direction sensing testee 3.To be gathered on the detector from the Compton scattering line of check point scattering.
Embodiment four: the structure of this routine described Compton scattering non-destructive detection device as shown in Figure 5, this device is made up of radioactive source 1, preceding collimating apparatus 2, detector 5, back collimating apparatus 4 and scanning motion device, and wherein radioactive source 1, preceding collimating apparatus 2, back collimating apparatus 4 and detector 5 all are installed on the described scanning motion device.Wherein the structure of back collimating apparatus 4 is to be installed by multi-disc parallel gate sheet to form, and utilizes the gap between each grizzly bar to constitute many ray channels, and the axis of back collimating apparatus 4 is along the detection zone 31 in the Compton scattering direction sensing testee 3.To be collected on the detector 5 from the Compton scattering line of detection zone 31 scatterings.
Embodiment five: the structure of this routine described Compton scattering non-destructive detection device as shown in Figure 6, this device is made up of radioactive source 1, preceding collimating apparatus 2, detector 5, back collimating apparatus 4 and scanning motion device, and wherein radioactive source 1, preceding collimating apparatus 2, back collimating apparatus 4 and detector 5 all are installed on the described scanning motion device.Wherein the main body of back collimating apparatus 4 is that the appropriateness extension of shielding cylinder and two blocks 41 of ray porch are formed, and forms roomy ray channel between two blocks.The axis of shielding cylinder is along the detection zone 31 in the Compton scattering direction sensing testee 3 in this example.Simultaneously, from the ray of scattering beyond the detection zone, then major part will be fallen by these link stopper 41 retainings and can not arrive detector 5.
Claims (6)
1, a kind of compton backscattering non-destructive detection device, by radioactive source (1), preceding collimating apparatus (2), detector (5), back collimating apparatus (4) and scanning motion device are formed, radioactive source (1) wherein, preceding collimating apparatus (2), detector (5) and back collimating apparatus (4) all are installed on the scanning motion device, collimating apparatus (2) is located between radioactive source (1) and the testee (3) before described, it is characterized in that back collimating apparatus (4) is provided with the multichannel ray channel by different resolutions, detection zone (31) on each ray channel two ends extended line difference directed towards detector (5) and the testee (3), this back collimating apparatus (4) and detector (5) are provided with along the Compton scattering direction of incident beam.
2, a kind of compton backscattering non-destructive detection device as claimed in claim 1, the structure that it is characterized in that described back collimating apparatus (4) is to be provided with the multi-disc grizzly bar in cone-shaped cavity, and the axis of this cone-shaped cavity and each sheet grizzly bar bus are along the detection zone (31) in the Compton scattering direction sensing testee (3).
3, a kind of compton backscattering non-destructive detection device as claimed in claim 1, it is characterized in that described radioactive source (1) and preceding collimating apparatus (2) are all along the axis setting of collimating apparatus (4) afterwards, back collimating apparatus (4) is made up of multi-disc garden awl or pyramid grid sheet, and cone angle is corresponding with the Compton scattering angle.
4, a kind of compton backscattering non-destructive detection device as claimed in claim 1, the structure that it is characterized in that described back collimating apparatus (4) is to be coaxially installed with multi-disc garden awl or pyramid grizzly bar in garden awl or pyramid cavity, and the axis of back collimating apparatus (4) is along the detection zone (31) in the Compton scattering direction sensing testee (3).
5, a kind of compton backscattering non-destructive detection device as claimed in claim 1, it is characterized in that described back collimating apparatus (4) is formed by the installation of multi-disc parallel gate sheet, the axis of back collimating apparatus (4) is along the detection zone (31) in the Compton scattering direction sensing testee (3).
6, a kind of compton backscattering non-destructive detection device as claimed in claim 1, the main body that it is characterized in that described back collimating apparatus (4) is that the appropriateness of shielding cylinder is extended, and two link stoppers (41) of being located at the porch, become a roomy ray channel between these two link stoppers (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97218440 CN2303294Y (en) | 1997-06-17 | 1997-06-17 | Compton scattering nondestructive testing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97218440 CN2303294Y (en) | 1997-06-17 | 1997-06-17 | Compton scattering nondestructive testing apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2303294Y true CN2303294Y (en) | 1999-01-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97218440 Expired - Fee Related CN2303294Y (en) | 1997-06-17 | 1997-06-17 | Compton scattering nondestructive testing apparatus |
Country Status (1)
| Country | Link |
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| CN (1) | CN2303294Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103091699A (en) * | 2012-12-29 | 2013-05-08 | 西北核技术研究所 | Device and method for measuring strong gamma ray energy spectrum using scattering method |
| CN108645760A (en) * | 2018-05-07 | 2018-10-12 | 济南七光电科技有限公司 | A kind of high throughput dusty material detection method, detection device and application process |
| CN111095028A (en) * | 2018-01-18 | 2020-05-01 | 株式会社日立制作所 | Radiographic apparatus |
| CN112730477A (en) * | 2020-12-22 | 2021-04-30 | 北京航星机器制造有限公司 | CT front collimator and manufacturing method thereof |
| CN113418943A (en) * | 2021-06-21 | 2021-09-21 | 四川轻化工大学 | Compton back scattering wall hollowing detection system and detection method |
-
1997
- 1997-06-17 CN CN 97218440 patent/CN2303294Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103091699A (en) * | 2012-12-29 | 2013-05-08 | 西北核技术研究所 | Device and method for measuring strong gamma ray energy spectrum using scattering method |
| CN111095028A (en) * | 2018-01-18 | 2020-05-01 | 株式会社日立制作所 | Radiographic apparatus |
| CN108645760A (en) * | 2018-05-07 | 2018-10-12 | 济南七光电科技有限公司 | A kind of high throughput dusty material detection method, detection device and application process |
| CN112730477A (en) * | 2020-12-22 | 2021-04-30 | 北京航星机器制造有限公司 | CT front collimator and manufacturing method thereof |
| CN112730477B (en) * | 2020-12-22 | 2023-06-16 | 北京航星机器制造有限公司 | Pre-CT collimator and manufacturing method thereof |
| CN113418943A (en) * | 2021-06-21 | 2021-09-21 | 四川轻化工大学 | Compton back scattering wall hollowing detection system and detection method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Li Hong Document name: Notification of Termination of Patent Right |
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |