CN104991267A - Position indicator used for searching lost radioactive source - Google Patents
Position indicator used for searching lost radioactive source Download PDFInfo
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- CN104991267A CN104991267A CN201510452201.XA CN201510452201A CN104991267A CN 104991267 A CN104991267 A CN 104991267A CN 201510452201 A CN201510452201 A CN 201510452201A CN 104991267 A CN104991267 A CN 104991267A
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Abstract
The invention discloses a position indicator used for searching a lost radioactive source. By using the principle that a scintillator detector acquires radioactive source rays with highest radiation intensity when radioactive source rays are vertically irradiated on the surface of a scintillator and further optimizing the structure of the scintillator detector and the detecting method of the scintillator detector, the lost radioactive source can be positioned. The lost radioactive source positioning speed and positioning precision can be improved. The harm of the lost radioactive source to the environment and human beings can be alleviated.
Description
Technical field
The present invention relates to radioactive source detecting devices technical field, especially relating to a kind of for searching the orientator losing radioactive source.
Background technology
At present to search and the location of losing radioactive source, blanket type search is carried out in the general position adopting conventional detectors may exist at loss radioactive source.Blanket type search needs personnel to carry detector to reduce investigative range gradually, waste time and energy, search precision is low, search speed is slow, have larger blindness, what in most cases obtain is a region comprising radioactive source, instead of the position determined, reduce location and lose the efficiency of radioactive source, add and be not in loss radioactive source under the protection state harmfulness to environment and the person.
Therefore, how to improve the locating speed and positioning precision of losing radioactive source, reducing to lose the harmfulness of radioactive source to environment and the person is the technical matters that current those skilled in the art need solution badly.
Summary of the invention
The object of the present invention is to provide a kind of for searching the orientator losing radioactive source, this orientator can improve the locating speed and positioning precision of losing radioactive source, reduces to lose radioactive source to the harmfulness of environment with the person.
For solving above-mentioned technical matters, technical scheme provided by the invention is:
For searching the orientator losing radioactive source, comprising:
Self-propelled mobile dolly, described self-propelled mobile dolly comprises pedestal, montant and bracing frame, described montant to be arranged on described pedestal and can to rotate along the longitudinal center line of self, described montant is by being fixed on bearing on described pedestal and described pedestal is rotationally connected, the bottom of described montant is connected by the output shaft of shaft coupling with the first stepper motor, support frame as described above and described montant are rotationally connected to make support frame as described above at vertical rotation in surface, described montant is provided with through hole, rotating shaft on support frame as described above is inserted in described through hole, one end of described rotating shaft is connected by the output shaft of shaft coupling with the second stepper motor,
Scintillator detector, described scintillator detector comprises scintillator and photomultiplier, described photomultiplier is arranged on the rear end face of described scintillator, described photomultiplier and described scintillator optically-coupled, and described scintillator detector is arranged on support frame as described above;
For shielding the shielded-plate tube of visible ray and radioactive source ray, described scintillator detector is integrally provided in the cavity in described shielded-plate tube;
For shielding shielding cover board before visible ray and radioactive source ray, described front shielding cover board is arranged on the end described shielded-plate tube being positioned at described scintillator side;
For shielding the rear shielding cover board of visible ray and radioactive source ray, described rear shielding cover board is arranged on the end described shielded-plate tube being positioned at described photomultiplier side;
For the collimator of transmission or shielding radioactive source ray, described collimator to be arranged on described front shielding cover board and to run through the thickness direction of described front shielding cover board.
Preferably, described scintillator detector also comprises data processing module, the corresponding relation horizontally rotating angle of the radiation intensity that described scintillator detector records by described data processing module and described scintillator detector is depicted as and horizontally rotates angle-radiation intensity relation curve, and the target level rotational angle of described scintillator detector when locating described radiation intensity maximal value; The corresponding relation of the radiation intensity record described scintillator detector and the vertical rotational angle of described scintillator detector is depicted as vertical rotational angle-radiation intensity relation curve, and the vertical rotational angle of target of described scintillator detector when locating described radiation intensity maximal value.
Preferably, described scintillator is round table-like with the coaxial center line of described collimator, and described scintillator is greater than the radius of described collimator endpiece near the radius of the front end face of described collimator, and the side of described scintillator is coated with layer of reflective material.
Preferably, described collimator is the flared pipe that reduces gradually of internal diameter from outside to inside.
Preferably, photoconduction is provided with between described scintillator and described photomultiplier, described photoconduction profile is cylindric, an end face of described photoconduction is identical with the rear end face area of described scintillator and be connected with the rear end face light of described scintillator by optocoupler mixture, and another end face of described photoconduction passes through described optocoupler mixture and is connected with the front end face light of described photomultiplier;
Described photoconduction is circular by several lateral cross section and the convex lens that circular lateral cross-section size does not wait are bonded by optocoupler mixture, convex lens described in several are configured to ground floor along the direction of transmission of visible light, the second layer, third layer, the ground floor being close to described scintillator rear end face comprises the identical miniature convex lens of several areas, miniature convex lens described in several evenly and be covered with the rear end face of whole described scintillator, the second layer comprises the external diameter convex lens identical with the rear end face external diameter of described scintillator, third layer comprises the external diameter convex lens identical with the rear end face external diameter of described scintillator,
The primary optical axis of all described convex lens all with the axial centerline parallel of described scintillator;
Described optocoupler mixture is silicone grease or optics cement.
Preferably, support frame as described above is provided with guide rail, the shell of described scintillator detector is provided with and coordinates with described guide rail to make described scintillator detector can along the groove of described slide.
Preferably, described self-propelled mobile dolly is wireless remote control type travelling car.
Preferably, described self-propelled mobile dolly also comprises mechanical arm, and for losing the container of radioactive source described in safe storage.
Compared with prior art, the invention provides a kind of for searching the orientator losing radioactive source, described scintillator detector is integrally provided in the shielded-plate tube for shielding radioactive source ray by this orientator, the end that described shielded-plate tube is positioned at described photomultiplier side is provided with rear shielding cover board, the end that described shielded-plate tube is positioned at described scintillator side is provided with front shielding cover board, described front shielding cover board is provided with the collimator running through described front shielding cover board, by shielded-plate tube and rear shielding cover board, the radioactive source alpha ray shield on other direction is fallen, make radioactive source ray only to enter in shielded-plate tube in the collimator on the past shielding cover board, beat on the scintillator in scintillator detector, then, radioactive source ray is utilized to take radioactive source as the centre of sphere, radially launch in solid space, when radioactive source ray is vertically beaten in scintillator surface, namely the length direction of scintillator detector is through radioactive source, the quantity of X-rays X that detector obtains is maximum, the principle that the radiation intensity of radioactive source ray is maximum, first by scintillator detector along vertical axes horizontal rotation in surface 360 °, the corresponding relation horizontally rotating angle of the radiation intensity recorded according to described scintillator detector and described scintillator detector, locate the target level rotational angle of described scintillator detector during described radiation intensity maximal value, again scintillator detector is transferred back to the target level rotational angle that previous step obtains, then along transverse axis vertical rotation in surface 180 °, the corresponding relation of the vertical rotational angle of the radiation intensity recorded according to described scintillator detector and described scintillator detector, locate the vertical rotational angle of target of described scintillator detector during described radiation intensity maximal value, the position of scintillator detector is finally determined by target level rotational angle and the vertical rotational angle of target, now scintillator detector length direction towards scintillator side bearing of trend pointed by position be namely lose the position of radioactive source.When the present invention utilizes radioactive source ray vertically to beat in scintillator surface, the principle that the radiation intensity of radioactive source ray that scintillator detector obtains is maximum, the radioactive source of loss is located by the optimization structure of scintillator detector and the detection method of scintillator detector, improve the locating speed and positioning precision of losing radioactive source, reduce and lose radioactive source to environment and personal harmfulness.
Further, photoconduction is provided with between described scintillator and described photomultiplier, described photoconduction is circular by several lateral cross section and the convex lens that circular lateral cross-section size does not wait are bonded by optocoupler mixture, the present invention makes full use of the principle that convex lens can be assembled light, the transmission path of visible ray arranges multilayer, the convex lens that size does not wait, the visible ray produced by scintillator is layer by layer to centre convergence, visible ray is made finally to be converged to the less a branch of directional light of external diameter, or even be merged into a visible light rays, then photomultiplier is entered, the energy of many visible light rays can more intensively be absorbed by photomultiplier, thus make position comparatively far away or be embedded in earth or radioactive source ray that energy that submergence loss radioactive source in a liquid sends is less can be detected by scintillator detector, during the negligible amounts of the radioactive source ray that scintillator detector can be made to receive, scintillator detector also can provide x ray intensity x value and variation tendency thereof, improve the sensitivity of orientator and detectable distance, thus improve the locating speed and positioning precision of losing radioactive source, reduce and lose radioactive source to environment and personal harmfulness.
Accompanying drawing explanation
The structural representation of the orientator that Fig. 1 provides for the embodiment of the present invention;
Fig. 2 is the structural representation of scintillator detector in Fig. 1.
In figure: 1 self-propelled mobile dolly, 101 mechanical arms, 102 plumbous boxes, 2 scintillator detectors, 201 shielded-plate tubes, shielding cover board before 202, shielding cover board after 203,204 collimators, 205 scintillators, 206 photoconductions, 2061 convex lens, 2062 optically-coupled oxidant layer, 207 photomultipliers.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belongs to the scope of protection of the invention.
In describing the invention, it will be appreciated that, term " " center ", " axis ", " radial direction ", " longitudinal direction ", " transverse direction ", " length ", " width ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " top ", " end ", " interior ", " outward ", " clockwise ", orientation or the position relationship of the instruction such as " counterclockwise " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or D score, the first and second features can be comprised and directly contact, also can comprise the first and second features and not be directly contact but by the other characterisation contact between them.And, fisrt feature second feature " on ", " top " and " above " comprise fisrt feature directly over second feature and oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " comprise fisrt feature immediately below second feature and tiltedly below, or only represent that fisrt feature level height is less than second feature.
With reference to the structural representation of the orientator that figure 1 and Fig. 2, Fig. 1 provide for the embodiment of the present invention; Fig. 2 is the structural representation of scintillator detector 2 in Fig. 1.
The invention provides a kind of for searching the orientator losing radioactive source, comprising:
Self-propelled mobile dolly 1, comprise pedestal, montant and bracing frame, montant to be arranged on pedestal and can to rotate along the longitudinal center line of self, and montant is by being fixed on bearing on pedestal and pedestal is rotationally connected, and the bottom of montant is connected by the output shaft of shaft coupling with the first stepper motor.
Bracing frame and montant are rotationally connected to make bracing frame at vertical rotation in surface, and montant is provided with through hole, and the rotating shaft on bracing frame is inserted in through hole, and one end of rotating shaft is connected by the output shaft of shaft coupling with the second stepper motor.
Scintillator detector 2, scintillator detector 2 comprises scintillator 205 and photomultiplier 207, and photomultiplier 207 is arranged on the rear end face of scintillator 205, and photomultiplier 207 and scintillator 205 optically-coupled, scintillator detector 2 is arranged on bracing frame.
Rotated along self longitudinal center line by the first stepping driven by motor montant, thus the bracing frame of horizontality can be driven horizontal rotation in surface 360 °, drive scintillator detector 2 along the vertical axes perpendicular to scintillator detector 2 length direction horizontal rotation in surface 360 °.By the second stepping driven by motor bracing frame along its axis of rotation, thus bracing frame can be driven at vertical rotation in surface, drive scintillator detector 2 along the transverse axis perpendicular to scintillator detector 2 length direction vertical rotation in surface 180 °.
Preferably, when the first stepping driven by motor montant rotates, disconnect the connection of the second stepper motor and corresponding shaft coupling, make scintillator detector 2 only at horizontal rotation in surface; When the second stepping driven by motor bracing frame rotates, disconnect the connection of the second stepper motor and corresponding shaft coupling, make scintillator detector 2 only at vertical rotation in surface.
For shielding the shielded-plate tube 201 of visible ray and radioactive source ray, scintillator detector 2 is integrally provided in the cavity in shielded-plate tube 201; For shielding shielding cover board 202 before visible ray and radioactive source ray, front shielding cover board 202 is arranged on end shielded-plate tube 201 being positioned at scintillator 205 side; For shielding the rear shielding cover board 203 of visible ray and radioactive source ray, rear shielding cover board 203 is arranged on end shielded-plate tube 201 being positioned at photomultiplier 207 side; For the collimator 204 of transmission or shielding radioactive source ray, collimator 204 to be arranged on front shielding cover board 202 and to run through the thickness direction of front shielding cover board 202.
In the present invention, scintillator detector 2 comprises scintillator 205 and photomultiplier 207, scintillator detector 2 is integrally provided in for shielding in the shielded-plate tube 201 of radioactive source ray, shielding cover board 202 before the end that shielded-plate tube 201 is positioned at scintillator 205 side is provided with, front shielding cover board 202 is provided with the collimator 204 of shielding cover board 202 before running through, and the end that shielded-plate tube 201 is positioned at photomultiplier 207 side is provided with rear shielding cover board 203.Above-mentioned shielded-plate tube 201, front shielding cover board 202, rear shielding cover board 203 and collimator 204, preferably, for pure lead or lead alloy make.Shielded-plate tube 201 is used for shielding the radioactive source ray on direction, scintillator detector 2 upper and lower, left and right and visible ray, rear shielding cover board 203 is used for shielding the radioactive source ray at scintillator detector 2 rear and visible ray, front shielding cover board 202 and collimator 204 are used for shielding the visible ray in scintillator detector 2 front and part radioactive source ray, make only have the ray vertical with scintillator 205 to enter in shielded-plate tube 201 with the intimate ray vertical with scintillator 205, beat on scintillator 205.
Preferably, control the constant airspeed that scintillator detector 2 horizontally rotates, the data recordin module that scintillator detector 2 carries can record the radiation intensity that scintillator detector 2 under each angle records, then the radiation intensity recorded according to scintillator detector 2 and the corresponding relation horizontally rotating angle of scintillator detector 2, the target level rotational angle of scintillator detector 2 during the radiation intensity maximal value of location.Preferably, control the constant airspeed that scintillator detector 2 vertically rotates, the data recordin module that scintillator detector 2 carries can record the radiation intensity that scintillator detector 2 under each angle records, the corresponding relation of the radiation intensity then recorded according to scintillator detector 2 and the vertical rotational angle of scintillator detector 2, the vertical rotational angle of target of scintillator detector 2 during the radiation intensity maximal value of location.
Scintillator 205 is round table-like with the coaxial center line of collimator 204, scintillator 205 is greater than the radius of collimator 204 endpiece near the radius of the front end face of collimator 204, preferably, the radius of front end face is slightly larger than the radius of collimator 204, both made the ray vertical with scintillator 205 all to beat on scintillator 205, and again reduced and beat the probability on scintillator 205 with scintillator 205 off plumb ray.The side of scintillator 205 is coated with layer of reflective material, avoids radioactive source ray and enter scintillator 205 from scintillator 205 side.
In one embodiment of the invention, collimator 204 has certain length, further, collimator 204 is the flared pipe that reduces gradually of internal diameter from outside to inside, when moving to scintillator 205 along collimator 204 with scintillator 205 off plumb ray, can inevitably meet at the tube wall of a certain position and collimator 204, thus be collimated pipe 204 and absorb, decrease the quantity entering shielded-plate tube 201 with scintillator 205 off plumb ray, improve positioning precision and the locating speed of above-mentioned localization method.
In view of in practical application, there is multiple unpredictable factor, during above-mentioned location radiation intensity maximal value, the target level rotational angle obtained may not be a concrete numerical value, but a numerical range, same, the vertical rotational angle of the target obtained also may not be a concrete numerical value, but a numerical range.And the data recordin module in traditional scintillator detector 2, only data can be recorded, provide maximum radiation intensity and rotational angle now, probably this maximum radiant intensity is only in numerous maximum radiant intensity, target rotational angle now is also likely a point in rotational angle range, have impact on positioning precision and the locating speed of orientator.For this reason, in one embodiment of the invention, scintillator detector 2 comprises data processing module, the corresponding relation horizontally rotating angle of the radiation intensity that scintillator detector 2 records by data processing module and scintillator detector 2 is depicted as and horizontally rotates angle-radiation intensity relation curve, and the target level rotational angle of scintillator detector 2 when locating radiation intensity maximal value; The corresponding relation of the radiation intensity record scintillator detector 2 and the vertical rotational angle of scintillator detector 2 is depicted as vertical rotational angle-radiation intensity relation curve, and the vertical rotational angle of target of scintillator detector 2 when locating radiation intensity maximal value.Crest, trough or step curve may be there is in above-mentioned relation curve.Angle-radiation intensity relation curve is horizontally rotated by what obtain, the distribution situation of radiation intensity in whole surface level and the situation of change with rotational angle can be found out at a glance, the target level angle of rotation angle value corresponding to peak radiant intensity can be located when crest appears in relation curve quickly and easily, angular range can be horizontally rotated by localizing objects quickly and easily when step curve appears in relation curve.The operation of vertical rotational angle-radiation intensity relation curve is the same.Then, then with the target level angle of rotation angle value obtained or the vertical rotational angle range of target carry out next step operation.Setting like this, improves the science and rationality that obtain target level rotational angle and the vertical rotational angle of target, improves positioning precision and the locating speed of above-mentioned localization method.Preferably, above-mentionedly horizontally rotating angle-radiation intensity relation curve to horizontally rotate angle for horizontal ordinate, take radiation intensity as ordinate; Above-mentioned vertical rotational angle-radiation intensity relation curve for horizontal ordinate, take radiation intensity as ordinate with vertical rotational angle.
In view of in practical application, in most cases, the target level rotational angle obtained and the vertical rotational angle of target are numerical range, in order to reduce this numerical range, improve locating speed and positioning precision, in one embodiment of the invention, bracing frame is provided with guide rail, the shell of scintillator detector 2 is provided with and coordinates with guide rail to make scintillator detector 2 can along the groove of slide, along slide, the front shielding cover board 202 of scintillator detector 2 and the air line distance of vertical axes can be changed to make scintillator detector 2.When scintillator detector 2 is after horizontal rotation in surface 360 °, front shielding cover board 202 is extended with the air line distance of vertical axes, then scintillator detector 2 is again rotated 360 ° in surface level.Scintillator detector 2 is when horizontal rotation in surface, probably scintillator detector 2 and radioactive source be not in a surface level, and the front end face of the reception ray of scintillator 205 is a vertical plane all the time, after distance extends, change the relative position of vertical end face and radioactive source, original ray vertical with scintillator 205 is made to become no longer vertical with scintillator 205, thus decrease the quantity of X-rays X entered in shielded-plate tube 201, reduce the scope of maximum radiant intensity, and then reduce the scope of target level rotational angle, improve positioning precision and locating speed.By scintillator detector 2 after vertical rotation in surface 180 °, front shielding cover board 202 is extended with the air line distance of transverse axis, then by scintillator detector 2 vertical rotation in surface 180 °, to reduce the scope of the vertical rotational angle of target, improve positioning precision and locating speed.
In practical application, the front end face of scintillator 205 has certain area, and the essence of ray is photon, there is no the concept of external diameter at all, when ray is beaten on scintillator 205, it is dispersion, after ray inspires visible ray in scintillator 205, the excitation direction of visible ray does not have rule to follow, be random completely, more disperse compared to the ray of incidence, causing visible ray to be beaten on photomultiplier 207 is also dispersion, the visible light energy of dispersion is not concentrated, as which limit the sensitivity of orientator and detectable distance.For this reason, in one embodiment of the invention, photoconduction 206 is provided with between scintillator 205 and photomultiplier 207, photoconduction 206 profile is cylindric, an end face of photoconduction 206 is identical with the rear end face area of scintillator 205 and be connected with the rear end face light of scintillator 205 by optocoupler mixture, and another end face of photoconduction 206 passes through optocoupler mixture and is connected with the front end face light of photomultiplier 207;
Photoconduction 206 is circular by several lateral cross section and the convex lens 2061 that circular lateral cross-section size does not wait are bonded by optocoupler mixture, several convex lens 2061 are configured to ground floor along the direction of transmission of visible light, the second layer, third layer, the ground floor of next-door neighbour's scintillator 205 rear end face comprises the identical miniature convex lens 2061 of several areas, several miniature convex lens 2061 evenly and be covered with the rear end face of whole scintillator 205, the second layer comprises the external diameter convex lens 2061 identical with the rear end face external diameter of scintillator 205, third layer comprises the external diameter convex lens 2061 identical with the rear end face external diameter of scintillator 205,
The primary optical axis of all convex lens 2061 all with the axial centerline parallel of scintillator 205;
Optocoupler mixture is silicone grease or optics cement.Optocoupler mixture forms optically-coupled oxidant layer 2062.
Preferably, the material of convex lens 2061 is optical glass.
The present invention makes full use of the principle that convex lens 2061 can be assembled light, the transmission path of visible ray arranges multilayer, the convex lens 2061 that size does not wait, the visible ray produced by scintillator 205 is layer by layer to centre convergence, visible ray is made finally to be converged to the less a branch of directional light of external diameter, or even be merged into a visible light rays, then photomultiplier 207 is entered, the energy of many visible light rays can more intensively be absorbed by photomultiplier 207, thus make position comparatively far away or be embedded in earth or radioactive source ray that energy that submergence loss radioactive source in a liquid sends is less can be detected by scintillator detector 2, during the negligible amounts of the radioactive source ray that scintillator detector 2 can be made to receive, scintillator detector 2 also can provide x ray intensity x value and variation tendency thereof, improve the sensitivity of orientator and detectable distance, thus improve the locating speed and positioning precision of losing radioactive source, reduce and lose radioactive source to environment and personal harmfulness.
In one embodiment of the invention, self-propelled mobile dolly 1 is wireless remote control type travelling car, control self-propelled mobile dolly 1 by wireless remote controller to move in the suspicious region of losing radioactive source, manually carry radioactive source detector before instead of, thus avoid radiation damage is caused to the life and health of the personnel of search.
In one embodiment of the invention, self-propelled mobile dolly 1 also comprises mechanical arm 101, and the container of radioactive source is lost for safe storage, after orientator finds to lose radioactive source, control self-propelled mobile 1 dolly by wireless remote controller and move to radioactive source position, utilize mechanical arm 101 to be picked up by radioactive source, then put into and safe storage can lose the container of radioactive source, preferably, said vesse is plumbous box 102.
The invention provides a kind of for searching the orientator losing radioactive source, scintillator detector 2 is integrally provided in for shielding in the shielded-plate tube 201 of radioactive source ray by this orientator, the end that shielded-plate tube 201 is positioned at photomultiplier 207 side is provided with rear shielding cover board 203, the end that shielded-plate tube 201 is positioned at scintillator 205 side is provided with front shielding cover board 202, front shielding cover board 202 is provided with the collimator 204 running through front shielding cover board 202, by shielded-plate tube 201 and rear shielding cover board 203, the radioactive source alpha ray shield on other direction is fallen, make radioactive source ray only to enter in shielded-plate tube 201 in the collimator 204 on the past shielding cover board 202, beat on the scintillator 205 in scintillator detector 2, then, radioactive source ray is utilized to take radioactive source as the centre of sphere, radially launch in solid space, when radioactive source ray vertically beat scintillator 205 on the surface time, namely the length direction of scintillator detector 2 is through radioactive source, the quantity of X-rays X that detector obtains is maximum, the principle that the radiation intensity of radioactive source ray is maximum, first by scintillator detector 2 along vertical axes horizontal rotation in surface 360 °, the corresponding relation horizontally rotating angle of the radiation intensity recorded according to scintillator detector 2 and scintillator detector 2, the target level rotational angle of scintillator detector 2 during the radiation intensity maximal value of location, again scintillator detector 2 is transferred back to the target level rotational angle that previous step obtains, then along transverse axis vertical rotation in surface 180 °, the corresponding relation of the vertical rotational angle of the radiation intensity recorded according to scintillator detector 2 and scintillator detector 2, the vertical rotational angle of target of scintillator detector 2 during the radiation intensity maximal value of location, the position of scintillator detector 2 is finally determined by target level rotational angle and the vertical rotational angle of target, now scintillator detector 2 length direction towards scintillator 205 side bearing of trend pointed by position be namely lose the position of radioactive source.The present invention utilize radioactive source ray vertically beat scintillator 205 on the surface time, the principle that the radiation intensity of radioactive source ray that scintillator detector 2 obtains is maximum, the radioactive source of loss is located by the optimization structure of scintillator detector 2 and the detection method of scintillator detector 2, improve the locating speed and positioning precision of losing radioactive source, reduce and lose radioactive source to environment and personal harmfulness.
The present invention mentions multiple technical matters, proposes corresponding technical scheme for each technical matters simultaneously.Multiple technical matters is not separate, interactional, make above-mentioned multiple technical schemes on the basis solving corresponding technical matters, further and other technical scheme combines, can significantly improve and solve the corresponding technique effect acquired by technical matters, or multiple technical matters can be solved simultaneously.Solve on the basis of corresponding technical matters in each independent technical scheme, multiple laddering technical scheme combines superposition mutually, cooperatively interact between technical scheme, mutually promote, form an overall plan, the technique effect obtained is much better than the technique effect of any one technical scheme above-mentioned, and synergistic effect is remarkable.
The material that the application does not describe in detail, method and device are prior art.
Apply specific embodiment herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (8)
1., for searching the orientator losing radioactive source, it is characterized in that, comprise:
Self-propelled mobile dolly, described self-propelled mobile dolly comprises pedestal, montant and bracing frame, described montant to be arranged on described pedestal and can to rotate along the longitudinal center line of self, described montant is by being fixed on bearing on described pedestal and described pedestal is rotationally connected, the bottom of described montant is connected by the output shaft of shaft coupling with the first stepper motor, support frame as described above and described montant are rotationally connected to make support frame as described above at vertical rotation in surface, described montant is provided with through hole, rotating shaft on support frame as described above is inserted in described through hole, one end of described rotating shaft is connected by the output shaft of shaft coupling with the second stepper motor,
Scintillator detector, described scintillator detector comprises scintillator and photomultiplier, described photomultiplier is arranged on the rear end face of described scintillator, described photomultiplier and described scintillator optically-coupled, and described scintillator detector is arranged on support frame as described above;
For shielding the shielded-plate tube of visible ray and radioactive source ray, described scintillator detector is integrally provided in the cavity in described shielded-plate tube;
For shielding shielding cover board before visible ray and radioactive source ray, described front shielding cover board is arranged on the end described shielded-plate tube being positioned at described scintillator side;
For shielding the rear shielding cover board of visible ray and radioactive source ray, described rear shielding cover board is arranged on the end described shielded-plate tube being positioned at described photomultiplier side;
For the collimator of transmission or shielding radioactive source ray, described collimator to be arranged on described front shielding cover board and to run through the thickness direction of described front shielding cover board.
2. orientator according to claim 1, it is characterized in that, described scintillator detector also comprises data processing module, the corresponding relation horizontally rotating angle of the radiation intensity that described scintillator detector records by described data processing module and described scintillator detector is depicted as and horizontally rotates angle-radiation intensity relation curve, and the target level rotational angle of described scintillator detector when locating described radiation intensity maximal value; The corresponding relation of the radiation intensity record described scintillator detector and the vertical rotational angle of described scintillator detector is depicted as vertical rotational angle-radiation intensity relation curve, and the vertical rotational angle of target of described scintillator detector when locating described radiation intensity maximal value.
3. orientator according to claim 1, it is characterized in that, described scintillator is round table-like with the coaxial center line of described collimator, described scintillator is greater than the radius of described collimator endpiece near the radius of the front end face of described collimator, and the side of described scintillator is coated with layer of reflective material.
4. orientator according to claim 3, is characterized in that, described collimator is the flared pipe that reduces gradually of internal diameter from outside to inside.
5. orientator according to claim 1, it is characterized in that, photoconduction is provided with between described scintillator and described photomultiplier, described photoconduction profile is cylindric, an end face of described photoconduction is identical with the rear end face area of described scintillator and be connected with the rear end face light of described scintillator by optocoupler mixture, and another end face of described photoconduction passes through described optocoupler mixture and is connected with the front end face light of described photomultiplier;
Described photoconduction is circular by several lateral cross section and the convex lens that circular lateral cross-section size does not wait are bonded by optocoupler mixture, convex lens described in several are configured to ground floor along the direction of transmission of visible light, the second layer, third layer, the ground floor being close to described scintillator rear end face comprises the identical miniature convex lens of several areas, miniature convex lens described in several evenly and be covered with the rear end face of whole described scintillator, the second layer comprises the external diameter convex lens identical with the rear end face external diameter of described scintillator, third layer comprises the external diameter convex lens identical with the rear end face external diameter of described scintillator,
The primary optical axis of all described convex lens all with the axial centerline parallel of described scintillator;
Described optocoupler mixture is silicone grease or optics cement.
6. orientator according to claim 1, is characterized in that, support frame as described above is provided with guide rail, the shell of described scintillator detector is provided with to coordinate to make described scintillator detector can along the groove of described slide with described guide rail.
7. orientator according to claim 1, is characterized in that, described self-propelled mobile dolly is wireless remote control type travelling car.
8. orientator according to claim 1, is characterized in that, described self-propelled mobile dolly also comprises mechanical arm, and for losing the container of radioactive source described in safe storage.
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