CN107677691A - A kind of hand-held x-ray spectrometer auxiliary sighting device and implementation - Google Patents
A kind of hand-held x-ray spectrometer auxiliary sighting device and implementation Download PDFInfo
- Publication number
- CN107677691A CN107677691A CN201710891562.3A CN201710891562A CN107677691A CN 107677691 A CN107677691 A CN 107677691A CN 201710891562 A CN201710891562 A CN 201710891562A CN 107677691 A CN107677691 A CN 107677691A
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- camera
- distance
- window
- collimator
- ray spectrometer
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- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/10—Different kinds of radiation or particles
- G01N2223/101—Different kinds of radiation or particles electromagnetic radiation
- G01N2223/1016—X-ray
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/30—Accessories, mechanical or electrical features
- G01N2223/316—Accessories, mechanical or electrical features collimators
Abstract
The invention discloses a kind of hand-held x-ray spectrometer auxiliary sighting device and implementation, the device includes the rangefinder and camera for being sequentially arranged at hand-held x-ray spectrometer lower head or top；Point-blank, the straight line overlaps the window arrangement of the window of rangefinder, the window of camera and the collimater on hand-held x-ray spectrometer with plane where detection window, and the straight line and plane-parallel；Host computer receives the range information of rangefinder, and according to collimater and the rangefinder relative position between camera respectively, the position of intersecting point of collimater and detected sample is calculated, and be shown on screen.The implementation includes：The position of the visual angle of camera, the range information of calculating object and camera, calculating collimater with spherical intersection position, calculating intersection point on screen is calculated, the position of intersecting point calculated is included on screen.Supplementary instrument detection window aims at detected sample during the present invention makes instrument test, avoids empty survey.
Description
Technical Field
The invention relates to an auxiliary detection device of a spectrometer, in particular to an auxiliary aiming device of a handheld X-ray spectrometer and an implementation method.
Background
For safety reasons, the detection window of the hand-held X-ray spectrometer is positioned at the forefront of the instrument and cannot be directly seen by a user during operation. For a small sample to be detected (or a sample with an irregular shape or a specific part to be detected), the detection window cannot be directly opposite to the sample to be detected, so that the accuracy of a detection result can be influenced; if the detection window is completely misaligned with the detected sample, and idle detection is generated, a large potential safety hazard exists.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an auxiliary aiming device of a handheld X-ray spectrometer and an implementation method, which are used for assisting a detection window of the instrument to aim at a detected sample in a testing process, so that idle measurement is avoided, and the data accuracy is improved.
The technical scheme adopted by the invention for solving the technical problems is as follows: a handheld X-ray spectrometer auxiliary sample aiming device comprises a distance meter and a camera which are sequentially arranged below or above the head of the handheld X-ray spectrometer; the window of the distance measuring instrument, the window of the camera and the window of the collimator on the handheld X-ray spectrometer are arranged on a straight line, the straight line is superposed with the plane where the detection window is located, and the straight line is parallel to the horizontal plane;
the distance measuring instrument is used for measuring the distance between the detected sample and the distance measuring instrument;
the camera is used for collecting images in front and displaying the images on a screen through a display;
the collimator is used for coupling in parameters for enabling the maximum efficiency of X rays;
the upper computer receives the distance information of the distance measuring instrument, calculates the intersection point position of the collimator and the detected sample according to the relative positions of the collimator and the distance measuring instrument and the camera respectively, and displays the intersection point position on a screen for aiming during testing.
An implementation method of the above-mentioned handheld X-ray spectrometer for assisting in aiming a sample device includes the following steps:
1) Calculating the visual angle of the camera:
θ＝2·arctan(d/2f)
in the formula: theta is the visual angle of the camera; d is the sensor size, mm; f is focal length, mm;
2) Calculating the distance information between the detected sample and the camera:
in the formula: l1 is the distance between the detected sample and the distance meter, and is mm; l2 is the distance between the detected sample and the camera, and is mm; a is the distance between the distance meter and the camera, and is mm;
3) Establishing an arc surface which takes the camera as the circle center and takes l2 as the radius, extracting the intersection point of the collimator and the arc surface, connecting the intersection point with the circle center, and recording the included angle between the connecting line and the visual angle limit of one side of the camera as gamma:
in the formula: beta is the inclination angle of the collimator relative to the plane where the detection window is located; b is the distance between the window of the collimator and the window of the camera; alpha is the inclination angle of the camera relative to the plane where the detection window is located;
4) The position of the intersection point on the screen is calculated, assuming that the uppermost coordinate of the screen is 0 and the lowermost coordinate is 1, and the position of the intersection point is linearly represented by a number (denoted as a) between [0,1 ]:
preferably, the
The beneficial effects of the invention are: the invention leads the auxiliary instrument detection window to aim at the detected sample in the instrument testing process, avoids idle detection, and leads a user not to directly observe the relative position of the instrument detection window and the detected sample in the aiming process but to indirectly observe through the screen, thereby saving time and ensuring the safety of the user while ensuring the joint of the detection window and the detected sample.
Drawings
FIG. 1 is a schematic diagram of the principles of the present invention;
FIG. 2 is a schematic diagram of a screen display according to the present invention;
in the figure: the device comprises an instrument head 1, a collimator 101, a range finder 102, a camera 103, a detection window 104, a sample 2 to be detected, a screen 3 and a sample intersection point position 301 of the detection window and the sample.
Detailed Description
The patent of the invention is further explained by the attached drawings in the specification.
As shown in fig. 1, the present invention provides an auxiliary sample aiming device for a handheld X-ray spectrometer, which comprises a distance measuring instrument 102 and a camera 103, which are sequentially installed below or above a head 1 of the handheld X-ray spectrometer; the window of the distance measuring instrument 102, the window of the camera 103 and the window of the collimator 101 on the handheld X-ray spectrometer are arranged on a straight line, the straight line is superposed with the plane where the detection window 104 is located, and the straight line is parallel to the horizontal plane;
the distance measuring instrument 102 is used for measuring the distance between the detected sample 2 and the distance measuring instrument 102;
the camera 103 is used for collecting images in front and displaying the images on the screen 3 through a display;
the collimator 101 is used for coupling-in parameters for maximum X-ray efficiency;
the device further comprises an upper computer, wherein the upper computer receives the distance information of the distance measuring instrument 102, calculates the intersection point position of the collimator 101 and the detected sample 2 according to the relative positions of the collimator 101 and the distance measuring instrument 102 and the camera 103, and displays the intersection point position on the screen 3 for aiming during testing.
The invention also provides an implementation method of the auxiliary sample aiming device of the handheld X-ray spectrometer, which comprises the following steps:
1) Calculating the visual angle of the camera:
θ＝2·arctan(d/2f) (1)
in the formula: theta is the visual angle of the camera; d is the sensor size, mm; f is focal length, mm;
2) Calculating the distance information between the detected sample and the camera:
in the formula: l1 is the distance between the detected sample and the distance measuring instrument, and is mm; l2 is the distance between the detected sample and the camera, and is mm; a is the distance between the distance meter and the camera, and is mm;
3) Establishing an arc surface which takes the camera as the circle center and takes l2 as the radius, extracting the intersection point of the collimator and the arc surface, connecting the intersection point with the circle center, and recording the included angle between the connecting line and the visual angle limit of one side of the camera as gamma:
when a =0 is set as the value of a =0,
when a is not equal to 0, the second phase,
then according to sine theorem, the following steps are obtained:
in the formula: beta is the inclination angle of the collimator relative to the plane where the detection window is located; b is the distance between the window of the collimator and the window of the camera; alpha is the inclination angle of the camera relative to the plane where the detection window is located;
4) The position of the intersection on the screen is calculated, assuming the uppermost coordinate of the screen is 0 and the lowermost coordinate is 1, and the position 301 of the intersection of the detection window and the sample is linearly represented by a number (denoted as a) between [0,1], as shown in fig. 2:
if l2&B indicates that the intersection point is not in the range of screen display, so l2 must be larger than b; in addition, in order to ensure that the object is still within the visual angle range of the camera when the object is close to the detection window or clings to the detection window, the reasonable alpha value is calculated when the system is arranged, and the embodiment is preferable
The position relation of the detected sample relative to the collimator (namely the direction of X rays emitted by the spectrometer) can be visually observed through the display screen, so that the detection window of the auxiliary instrument aims at the detected sample in the instrument testing process, and idle measurement is avoided.
Claims (3)
1. An auxiliary aiming device of a handheld X-ray spectrometer is characterized by comprising a distance meter and a camera which are sequentially arranged below or above the head of the handheld X-ray spectrometer; the window of the distance measuring instrument, the window of the camera and the window of the collimator on the handheld X-ray spectrometer are arranged on a straight line, the straight line is superposed with the plane where the detection window is located, and the straight line is parallel to the horizontal plane;
the distance measuring instrument is used for measuring the distance between the detected sample and the distance measuring instrument;
the camera is used for collecting images in front and displaying the images on a screen through a display;
the collimator is used for coupling in parameters for enabling the maximum efficiency of X-rays;
the upper computer receives the distance information of the distance measuring instrument, calculates the intersection point position of the collimator and the detected sample according to the relative positions of the collimator and the distance measuring instrument and the camera respectively, and displays the intersection point position on a screen for aiming during testing.
2. A method of implementing the auxiliary aiming device of a handheld X-ray spectrometer as claimed in claim 1, the method comprising the steps of:
1) Calculating the visual angle of the camera:
θ＝2·arctan(d/2f)
in the formula: theta is the visual angle of the camera; d is the sensor size, mm; f is focal length, mm;
2) Calculating the distance information between the detected sample and the camera:
in the formula: l1 is the distance between the detected sample and the distance measuring instrument, and is mm; l2 is the distance between the detected sample and the camera, and is mm; a is the distance between the distance meter and the camera, and is mm;
3) Establishing an arc surface which takes the camera as the circle center and takes l2 as the radius, extracting the intersection point of the collimator and the arc surface, connecting the intersection point with the circle center, and recording the included angle between the connecting line and the visual angle limit of one side of the camera as gamma:
in the formula: beta is the inclination angle of the collimator relative to the plane where the detection window is located; b is the distance between the window of the collimator and the window of the camera; alpha is the inclination angle of the camera relative to the plane where the detection window is located;
4) The position of the intersection point on the screen is calculated, assuming that the uppermost coordinate of the screen is 0 and the lowermost coordinate is 1, and the position of the intersection point is linearly represented by a number (denoted as a) between [0,1 ]:
3. the method of claim 2, wherein the step of performing the method comprises
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| CN201710891562.3A CN107677691A (en) | 2017-09-27 | 2017-09-27 | A kind of hand-held x-ray spectrometer auxiliary sighting device and implementation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2574927A (en) * | 2018-04-20 | 2019-12-25 | Cavendish Nuclear Ltd | Improvements in and relating to detection |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104483337A (en) * | 2014-11-24 | 2015-04-01 | 南京航空航天大学 | Scanning type metal surface imaging and component analyzing device |
| CN105974461A (en) * | 2016-05-04 | 2016-09-28 | 中国原子能科学研究院 | Gamma ray scanning imaging and radionuclide identification system and method thereof |
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2017
- 2017-09-27 CN CN201710891562.3A patent/CN107677691A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104483337A (en) * | 2014-11-24 | 2015-04-01 | 南京航空航天大学 | Scanning type metal surface imaging and component analyzing device |
| CN105974461A (en) * | 2016-05-04 | 2016-09-28 | 中国原子能科学研究院 | Gamma ray scanning imaging and radionuclide identification system and method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2574927A (en) * | 2018-04-20 | 2019-12-25 | Cavendish Nuclear Ltd | Improvements in and relating to detection |
| GB2574927B (en) * | 2018-04-20 | 2022-10-05 | Cavendish Nuclear Ltd | Radiation detector with visual imaging |
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Application publication date: 20180209 |