CN101482653B - Regulating system and method for collimating device - Google Patents
Regulating system and method for collimating device Download PDFInfo
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- CN101482653B CN101482653B CN 200810056060 CN200810056060A CN101482653B CN 101482653 B CN101482653 B CN 101482653B CN 200810056060 CN200810056060 CN 200810056060 CN 200810056060 A CN200810056060 A CN 200810056060A CN 101482653 B CN101482653 B CN 101482653B
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Abstract
The invention discloses a collimator regulation system comprising a collimator comprising a collimating slit extended horizontally along the longitudinal direction; a first adjusting device connected to one longitudinal end of the collimator and capable of moving vertically along the direction vertical to the collimating slit approximately; and a second adjusting device connected to the other onelongitudinal end of the collimator and capable of moving vertically along the direction vertical to the collimating slit approximately. Each of the first and the second adjusting devices includes: a drive device connected to the collimator to drive the collimator to move vertically; and a drive device which includes a drive motor for driving the drive device, wherein the drive device includes a nut connected to the collimator; a screw matched with the nut and connected to the drive motor to drive the screw to rotate, wherein, when the drive motor drives the screw to rotate, the nut matched with the screw generates a vertical movement to drive the collimator to vertically move.
Description
Technical field
The present invention relates to the radiant image detection technique, specifically, relate to a kind of method that is used for the collimator adjustment system and is used to regulate collimator system.More particularly, the present invention relates to a kind of varitrol and a kind of method that is used for regulating automatically collimator system of collimating apparatus.
Background technology
For improving the quality of radiant image, to come radiographic source is focused on collimator apparatus usually, the quality of focusing depends on the control of collimating slit aligned position in the collimator apparatus and to the shield effectiveness of unnecessary ray.The existing radiographic source that utilizes carries out the collimator apparatus of safety detection to object, mostly adopts manual adjustment means to regulate the position of collimating slit.Because ray has harm to human body, usually collimator apparatus is installed in the shielding box, like this, when the collimation apparatus is regulated, need open shielding box, and is loaded down with trivial details and difficult thereby the operation that makes the collimation apparatus regulate becomes.Usually, people can only manual adjustments be arranged in the position of the collimating apparatus of shielding box during adjusting, according to becoming image further to control the position of collimating apparatus on detector, need thus repeatedly to regulate then.This manual adjustment method more complicated and expending time in, and, be difficult to fast and determine exactly the desirable collimating slit position of collimator apparatus based on the restriction of the precision and the mode of operation of manual adjustments.
Summary of the invention
Given this, purpose of the present invention is intended to solve at least one aspect of the above-mentioned problems in the prior art and defective.
Correspondingly, the object of the present invention is to provide a kind of collimator system and the method that is used to regulate collimator system, it has guaranteed the requirement of imaging and focusing, makes that adjustment and control collimating apparatus are more easy and efficient.
According to an aspect of the present invention, it provides a kind of collimator adjustment system, comprising:
Collimating apparatus, described collimating apparatus comprise the collimating slit that extends along its longitudinal direction basic horizontal;
First regulating device, described first regulating device be connected to described collimating apparatus along its end longitudinally, and can vertically move along the direction that is approximately perpendicular to described collimating slit; And
Second regulating device, described second regulating device be connected to described collimating apparatus along its other end longitudinally, and can vertically move along the direction that is approximately perpendicular to described collimating slit, each in wherein said first, second regulating device comprises:
Gearing, described gearing are connected with described collimating apparatus to drive described collimating apparatus vertical motion; And drive unit, described drive unit comprises drive motor, is used to drive described gearing,
Wherein said gearing comprises:
Nut, described nut is connected with described collimating apparatus;
With the screw rod that described nut matches, described screw rod links to each other with drive screw turns, wherein with drive motor:
When drive motor drove the screw rod rotation, the nut that matches with described screw rod produced vertical motion, to drive described collimating apparatus vertical motion.
In one embodiment, the collimator adjustment system also comprises: shielding box, described shielding box are arranged on described collimating apparatus outside with the described collimating apparatus of basic coating, and have opening disposed thereon and that align with the collimating slit of collimating apparatus.
Preferably, described drive motor is stepper motor or servomotor.
Further, described gearing further comprises the pivot unit, and it comprises: first web member that extends out from the end of described nut; Second web member that is fastenedly connected with described collimating apparatus; And bearing pin, described bearing pin runs through described first, second web member, so that described first, second web member can rotate at predetermined angular range around described bearing pin.
Again further, the rod member of described first web member for extending out from the end of described nut; And described second web member is the U type seat that is fastenedly connected with described collimating apparatus, described rod member is contained in the cavity of described U type seat, and described bearing pin runs through described rod member and U type seat, so that described rod member and U type seat can rotate at predetermined angular range around described bearing pin.
Valuably, described nut is slidingly connected by axle sleeve and the formation of described shielding box that is arranged on the shielding box, so that described nut can vertically produce sliding motion with respect to described shielding box.
Preferably, between the 1mm, the degree of regulation of gearing is 0.05mm to the degree of regulation of described gearing at 0.01mm.In one embodiment, the degree of regulation of described nut, screw drive mode is 0.05mm.
In one embodiment, the collimator adjustment system also comprises: the apical position sensor that is arranged on the apical position that is used to detect and limit described collimating apparatus on the described shielding box; And the bottom position sensor that is arranged on the bottom position that is used to detect and limit described collimating apparatus on the described shielding box.
Preferably, each in described apical position sensor and the described bottom position sensor is near switch or microswitch.
Preferably, the collimator adjustment system also comprises: controller, it is used for controlling in response to operator's input or computer instruction the motion of first, second regulating device, and then the position of collimation device is regulated.
In one embodiment, also be provided with catch on the described collimating apparatus, when the described catch on the collimating apparatus triggers in described apical position sensor or the described bottom position sensor one, first, second regulating device controlled by described controller so that its stop motion, and then makes the collimating apparatus stop motion.
Further, the collimator adjustment system also comprises bias unit, and described bias unit is arranged on and is used on the described shielding box applying bias power to described collimating apparatus, to guarantee the degree of regulation between screw rod and the nut.
Valuably, described bias unit comprises: be connected to the spring on the described shielding box; The web joint integrally formed or that extend out from described collimating apparatus with collimating apparatus; Be arranged on the push rod between described spring and the described web joint, its medi-spring is applied to bias power on the described collimating apparatus by push rod.
According to a further aspect in the invention, it provides a kind of method of regulating the collimator system of radiation detection system, and wherein said radiation detection system comprises: radiation source, aforementioned collimator adjustment system and detector is characterized in that described method comprises step:
By first, second regulating device with collimator positioner to its initial adjustment position, and determine along the longitudinal direction first, second of described collimating apparatus terminal and with first, second measuring positions of two corresponding detectors of end of described collimating apparatus;
Obtain the radiation detection data on first, second measuring position of first, second terminal corresponding detector of described initial adjustment position and described collimating apparatus;
Repeat described first, second regulating device of driven in synchronism, vertically move down predetermined displacement to a plurality of subsequent adjustment position to drive described collimating apparatus, obtain a plurality of radiation detection data on described first, second measuring position simultaneously, arrive its terminal adjusting position up to described collimator positioner;
Compare the whole radiation detection data on first, second measuring position, to determine that respectively first, second maximum on first, second measuring position detects data, determine to detect with described first, second maximum in described initial adjustment position and the described a plurality of subsequent adjustment position first, second selection adjusting position of the corresponding described collimating apparatus of data simultaneously; And
Control first, second regulating device respectively and navigate to first, second selection adjusting position respectively with described first, second end with collimating apparatus.
In one embodiment, described initial adjustment position is the apical position of described collimating apparatus, and described terminal adjusting position is the bottom position of described collimating apparatus.
Alternately, described initial adjustment position is the bottom position of described collimating apparatus, and described terminal adjusting position is the apical position of described collimating apparatus.
In one embodiment, this method also comprises step: the apical position sensor that is provided for detecting and limit the apical position of described collimating apparatus; And the bottom position sensor that is provided for detecting and limit the bottom position of described collimating apparatus, when described apical position sensor or described bottom position sensor are triggered by described collimating apparatus, first, second regulating device controlled by described controller so that its stop motion, and then makes the collimating apparatus stop motion.
By adopting technical scheme of the present invention, because it realizes the automatic adjusting of collimation device position by first, second regulating device, and do not need the manual unlocking shield assembly, thereby removed the loaded down with trivial details and difficult of manual adjustments from.
In addition,, not only can realize the adjusting of the upper-lower position of collimating apparatus, can also realize the tilt adjustment of collimation device position owing to be provided with two independently regulating devices.
In addition, by gearing, for example the position of the collimating slit of collimating apparatus is controlled and regulated to stepper motor, thereby can simplify adjustment process, and can determine the ideal position of the collimating slit of collimating apparatus quickly and accurately.
Description of drawings
Fig. 1 is the structural representation according to the collimator system in one embodiment of the present invention.
Fig. 2 is the sectional view along A-A line intercepting among Fig. 1.
Fig. 3 is the principle schematic that shows according to the adjusting pattern of collimator system of the present invention, and wherein Fig. 3 A is the synoptic diagram of the synchronous up-down adjustment of collimating apparatus; Fig. 3 B is the synoptic diagram of collimating apparatus tilt adjustment.
Fig. 4 shows the structural representation that has according to the radiation detection system of collimator system of the present invention, and wherein Fig. 4 A shows the front elevation that has according to the radiation detection system of collimator system of the present invention; Fig. 4 B is the sectional view along the intercepting of Fig. 4 A center line C-C line.
Fig. 5 is a process flow diagram of being used in according to the embodiment of the present invention regulating the method for collimator system.
Embodiment
Below by embodiment, and in conjunction with the accompanying drawings, technical scheme of the present invention is described in further detail.In instructions, same or analogous drawing reference numeral is indicated same or analogous parts.Following explanation to embodiment of the present invention is intended to present general inventive concept of the present invention is made an explanation with reference to accompanying drawing, and not should be understood to a kind of restriction of the present invention.
Referring to Fig. 1, it shows the synoptic diagram according to the collimator adjustment system 100 of one embodiment of the present invention.As shown in Figure 1, collimator adjustment system 100 comprises: collimating apparatus 4, described collimating apparatus comprise the collimating slit 40 that extends along its longitudinal direction basic horizontal; First regulating device 20, described first regulating device be connected to described collimating apparatus 4 along its end (left end among Fig. 1) longitudinally, and can vertically move along the direction that is approximately perpendicular to described collimating slit 40; And second regulating device 30, described second regulating device be connected to described collimating apparatus 4 along its other end (right-hand member among Fig. 1) longitudinally, and can vertically move along the direction that is approximately perpendicular to described collimating slit 40.Need to prove, be that position relation between example collimation device 4 and first, second regulating device 20,30 has been carried out exemplary illustration with orthogonal substantially horizontal direction and vertical direction in the above-mentioned embodiment of the present invention, but horizontal direction of the present invention and vertical direction do not have limited significance, and it can be any other suitable direction.
Referring to Fig. 1 and Fig. 2, collimator adjustment system 100 also comprises: shielding box 3, this shielding box are arranged on described collimating apparatus 4 outsides with the described collimating apparatus 4 of basic coating, and have opening 50 disposed thereon and that align substantially with the collimating slit 40 of collimating apparatus.By at collimating apparatus 4 outer setting shielding boxs 3, can reduce effectively in collimator adjustment system 100 courses of work, radiation ray leaks into the outside human body is damaged.
Referring to Fig. 1 and Fig. 2, has essentially identical structure according to first regulating device 20 of the present invention and second regulating device 30.But the present invention is not limited to this, and first regulating device 20 also can have different structures with second regulating device 30, as long as it can realize essentially identical function.In first, second regulating device 20,30 each comprises: gearing, described gearing are connected with described collimating apparatus 4 to drive described collimating apparatus 4 vertical motions; And drive unit, described drive unit is used to drive described gearing.
In one embodiment, as shown in Figure 2, gearing comprises nut 10, and described nut is connected with described collimating apparatus 4; The screw rod 11 that matches with described nut 10, described screw rod 11 links to each other with drive motor as drive unit and rotates with drive screw 11, wherein: when drive motor drives screw rod 11 rotations, the nut 10 that matches with described screw rod 11 produces vertical motion, to drive described collimating apparatus 4 vertical motions.In one embodiment, drive motor is a stepper motor 13.But the present invention is not limited to this, and can adopt other suitable alternative forms, for example servomotor.As shown in Figure 2, the output shaft of stepper motor 13 is connected to screw rod 11 by shaft coupling 12.
In above-mentioned illustrative embodiments, the form that gear train adopts the screw rod 11 be fitted to each other and nut 10 with drive unit for example rotatablely moving of stepper motor 13 change into the rectilinear motion of nut 10, and then drive collimating apparatus 4 realizes rectilinear motions, but the present invention is not limited to this, and multiple alternative can be arranged.For example, gearing also can adopt at least a in the synchronous band kind of drive, gear transmission mode and the rack-and-pinion kind of drive.Further, first, second regulating device 20,30 both can adopt the identical kind of drive, can adopt the different kinds of drive.For guaranteeing the degree of regulation of collimation device system effectively, the degree of regulation of gearing at 0.01mm between the 1mm.Preferably, the degree of regulation of gearing is 0.05mm.Particularly, in the kind of drive that adopts screw rod 11 and nut 10, the degree of regulation of described nut, screw rod is that helical pitch is 0.05mm.The bolt and nut of present embodiment is by for example copper or for example resin material manufacturing of nonmetallic materials of metal material.
Further, referring to Fig. 1 and Fig. 2, gearing further comprises the pivot unit, and it comprises: first web member that extends out from the end of described nut 10; Second web member of fixedlying connected with described collimating apparatus 4; And bearing pin 9, described bearing pin runs through described first, second web member, so that described first, second web member can rotate at predetermined angular range around described bearing pin 9.
In one embodiment, as depicted in figs. 1 and 2, the rod member 16 that described first web member extends out for the end from described nut 10; And described second web member is the U type seat 8 of fixedlying connected with described collimating apparatus 4, U type seat 8 is the U font and has the cavity that is positioned at its center, described rod member 16 is contained in the cavity of described U type seat 8, and described bearing pin 9 runs through described rod member 16 and U type seat 8, so that described rod member 16 and U type seat 8 can rotate at predetermined angular range around described bearing pin 9.
Referring to Fig. 1 and Fig. 2, the integrally formed or web joint 4b that extended out in the lower end of collimating apparatus 4, this web joint 4b are by the mode of being fastenedly connected, and for example screw bolt and nut mode and U type seat 8 are fastenedly connected.In one embodiment, collimator adjustment system 100 also comprises bias unit, and described bias unit is arranged on and is used on the described shielding box 3 applying bias power to described collimating apparatus 4, to guarantee the degree of regulation between screw rod and the nut.In one embodiment, bias unit comprises: be set to the spring abutment 5 on the shielding box 3; Be received into the spring 6 in the spring abutment 5; The upper end of the described collimating apparatus 4 web joint 4a that is formed with or extended out; Be arranged on the push rod 7 between described spring 6 and the described web joint 4a, its medi-spring 6 is applied to bias power on the web joint 4a of collimating apparatus 4 by push rod 7.By adopting said structure, because in the adjustment process of collimator system 100, bias unit is applied to bias power on the collimating apparatus 4 by for example push rod 7 all the time, can eliminate the gap between screw rod and nut, thereby further guarantees the accuracy of adjusting.Though in the above-described embodiments, bias unit is applied to bias power on the collimating apparatus 4 by the mode of compression spring, and the present invention is not limited to this, and can adopt other alternative.For example, adopt the extension spring that is arranged on shielding box 3 downsides that bias power is applied on the collimating apparatus 4.
Referring to Fig. 1 and Fig. 2, nut 10 is slidingly connected with described shielding box 3 formation by the axle sleeve 14 that for example welding manner is arranged on the shielding box 3, so that described nut 10 can vertically produce sliding motion with respect to described shielding box 3.Specifically, nut 10 runs through the downside of shielding box 3, runs through the position of the downside of shielding box 3 at nut 10, is provided with axle sleeve 14, so that nut 10 matches with axle sleeve 14 and can produce sliding motions with respect to axle sleeve 14.
In order to support effectively and fixing collimator system 100, as shown in Figure 1, the motor bearing 15 of stepper motor 13 adopt the mode that is fastenedly connected for example bolt, nut connected mode be connected on the shielding box 3, thereby collimator system 100 is fixing independently.
Referring to Fig. 1, the collimator adjustment system also comprises: the apical position sensor 1a that is arranged on the apical position that is used to detect and limit described collimating apparatus 4 on the described shielding box 3; And the bottom position sensor 1b that is arranged on the bottom position that is used to detect and limit described collimating apparatus 4 on the described shielding box 3.Can be near switch or microswitch in described apical position sensor and the described bottom position sensor.On the other hand, also be provided with catch 2 on the described collimating apparatus 4, in the adjustment process of collimator system, for example, when collimating apparatus 4 moved upward the position that thereby catch 2 arrives basically with apical position sensor 1a aligns mutually along vertical direction roughly, described apical position sensor 1a was triggered.Need to prove,, then need to form physics and contact with catch 2 if apical position sensor 1a is a microswitch.In like manner, thus when collimating apparatus 4 moved upward the position that catch 2 arrives basically with bottom position sensor 1b aligns mutually along vertical direction roughly, bottom position sensor 1b was triggered.Similarly, if bottom position sensor 1b is a microswitch, then needs to form physics and contact with catch 2.The collimator adjustment system also comprises in addition: the controller (not shown), it is used for controlling in response to operator's input or computer instruction the motion of first, second regulating device 20,30, and then the position of collimation device 4 is regulated.When the described catch on the collimating apparatus 42 triggered among described apical position sensor 1a and the described bottom position sensor 1b one, first, second regulating device 20,30 controlled by described controller so that its stop motion, and then makes collimating apparatus 4 stop motions.
Below the regulative mode according to collimator system of the present invention is described.Because employing is independently regulated the position of first, second regulating device collimation device 4 among the present invention, it can realize following three kinds of regulative modes:
1. referring to Fig. 3 A, the stepper motor of first, second regulating device 20,30 of the and arranged on left and right sides of collimating apparatus 4 synchronously, motion in the same way, the degree of regulation of first, second regulating device 20,30 is identical simultaneously.At this moment, collimating apparatus 4 will move up and down identical distance H synchronously in the same way, thereby realize collimating apparatus adjusted in concert up and down;
2. the step motor drive collimating apparatus of first regulating device 20 in collimating apparatus 4 left sides moves upward or is motionless, and the stepper motor of second regulating device 30 on collimating apparatus 4 right sides is motionless or drive collimating apparatus and move down, and can realize the adjusting that is tilted to the right of collimating apparatus.
3. the step motor drive collimating apparatus of first regulating device 20 in collimating apparatus 4 left sides moves downward or is motionless, the stepper motor of second regulating device 30 on collimating apparatus 4 right sides is motionless or drive the collimating apparatus for example h of certain distance that moves up, and can realize the adjusting that is tilted to the left of collimating apparatus.
In above-mentioned tilt adjustment mode, shown in Fig. 3 B, when the regulating device of collimating apparatus 4 one sides for example second regulating device 30 with respect to the regulating device of opposite side, when for example first regulating device 20 exceeds preset space length h, because collimating apparatus 4 and gearing for example are connected to fastening means between the U type seat 8, it has enough structural rigidities, collimating apparatus 4 will produce an acting force to the pivot unit this moment, so that the pivot unit produces the rotation of a preset range, and then collimating apparatus 4 will produce small horizontal shift Δ in the horizontal direction.In the present invention, because this collimator adjustment system 100 comprises the pivot unit, it comprises: the rod member 16 that extends out from the end of described nut 10; The U type seat 8 of fixedlying connected with described collimating apparatus 4; And bearing pin 9, described bearing pin runs through rod member 16 and U type seat 8, so that described rod member 16 and U type seat 8 can rotate at predetermined angular range around described bearing pin 9, thereby allow collimating apparatus 4 that the small horizontal shift that is limited in the preset range takes place in the horizontal direction.
Owing to be provided with two independently first, second regulating devices 20,30 among the present invention, not only can realize the adjusting of the upper-lower position of collimating apparatus 4, can also realize the tilt adjustment of collimation device 4 positions.
Next, a kind of method that is used to regulate collimator system according to the present invention is described.Referring to Fig. 5.In step S1, by first, second regulating device 20,30, for example drive stepping motor 13, collimating apparatus 4 is navigated to its initial adjustment position, apical position for example, and determine described collimating apparatus 4 along the longitudinal direction first, second terminal A ', B ' and with first, second measuring position A, the B of two corresponding detectors 110 of terminal A ', B ' of described collimating apparatus 4.Specifically, driving collimating apparatus 4 by stepper motor 13 moves upward, interdict near switch 1a as catch 2, then be triggered near switch 1a, feed back to signal to controller near switch 1a, controller shows then that based on 13 stop motions of above-mentioned feedback signal control step motor collimating apparatus 4 arrives tip position.
At this moment, start the radiation source 120 of radiation detection system 200, radiation ray for example X ray, isotope ray emits from radiogenic target spot P, and radiation beam projects on the detector 110 then through the collimation of the collimating apparatus seam 40 of collimating apparatus 4.Referring to Fig. 4 B, in step S2, the radiation detection data D0 on first, second measuring position A, the B on the detector window plane of the corresponding detector 110 of first, second terminal A ', B ' that obtains in described initial adjustment position and described collimating apparatus 4.
Next, repeat described first, second regulating device 20,30 of driven in synchronism, vertically move down predetermined displacement to a plurality of subsequent adjustment position to drive described collimating apparatus 4, obtain a plurality of radiation detection data on described first, second measuring position A, the B simultaneously, navigating to its terminal adjusting position up to described collimating apparatus 4 is bottom position.Specifically, when collimating apparatus 4 runs to bottom position, be installed in triggering of shielding box 3 bottoms near switch 1b, feed back to signal to controller near switch 1b, controller shows then that based on 13 stop motions of above-mentioned feedback signal control step motor collimating apparatus 4 arrives bottom position.
Then, compare the whole radiation detection data on first, second measuring position, to determine that respectively first, second maximum on first, second measuring position A, the B detects data, determine to detect with described first, second maximum in described initial adjustment position and the described a plurality of subsequent adjustment position first, second selection adjusting position of the corresponding described collimating apparatus of data simultaneously.Specifically, based on obtaining first of detector 110, the second measuring position A, the radiation detection data at B place, can draw out the curve map of detector data in two whole strokes, judge that (for example realizing by software) goes out the maximal value that A point and B are ordered, since described collimating apparatus 4 along the longitudinal direction first, the second terminal A ', first of B ' position and detector 110, the second measuring position A, B is corresponding, can determine with detector 110 on the adjusting position of the corresponding collimating apparatus 4 of maximal value of radiation detection data, the adjusting position of described collimating apparatus that will be corresponding with the maximum detection data of the left and right sides is defined as first, second selects adjusting position, the adjusting position of promptly desirable collimating apparatus.
At last, control first, second regulating device respectively and navigate to first, second selection adjusting position respectively with described first, second end with collimating apparatus.Under predetermined degree of regulation, the adjusting position of this collimating apparatus is the ideal position of collimating apparatus.
In one embodiment of the invention, described controller can be microprocessor or microcomputer, the motion that it controls first, second regulating device 20,30 in response to operator's input or computer instruction, and then the position of collimation device 4 is regulated.For example, first of the detector 110 that obtains, the second measuring position A, the radiation detection data at B place are input in microprocessor or the microcomputer, microprocessor or microcomputer operating software are drawn out the curve map of detector data in two whole strokes, to judge the maximal value that A point and B are ordered, since described collimating apparatus 4 along the longitudinal direction first, the second terminal A ', first of B ' position and detector 110, the second measuring position A, B is corresponding, can determine with detector 110 on the adjusting position of the corresponding collimating apparatus 4 of maximal value of radiation detection data, will with a left side, the adjusting position that the maximum of right both sides detects the described collimating apparatus of data correspondence is defined as first, second selects adjusting position, the adjusting position of promptly desirable collimating apparatus.
Though in above-mentioned regulative mode, described initial adjustment position is the apical position of described collimating apparatus, described terminal adjusting position is the bottom position of described collimating apparatus; But the present invention is not limited only to this, and described initial adjustment position also can be the bottom position of described collimating apparatus, and described terminal adjusting position also can be the apical position of described collimating apparatus.
In the process that above-mentioned collimating apparatus 4 is regulated by regulating device, the predetermined displacement that described collimating apparatus moves at every turn at 0.01mm between the 1mm.Preferably, the mobile at every turn predetermined displacement of described collimating apparatus is 0.05mm.
By adopting the above-mentioned method that is used to regulate collimator system of the present invention, pass through gearing, for example the position of the collimating slit of collimating apparatus is controlled and regulated to stepper motor, thereby can simplify adjustment process, and can determine the ideal position of the collimating slit of collimating apparatus quickly and accurately.
Though some embodiment of this present general inventive concept are shown and illustrate, those skilled in the art will appreciate that, under the situation of principle that does not deviate from this present general inventive concept and spirit, can make a change these embodiment, scope of the present invention limits with claim and their equivalent.
Claims (23)
1. collimator adjustment system comprises:
Collimating apparatus, described collimating apparatus comprise the collimating slit that extends along its longitudinal direction basic horizontal;
First regulating device, described first regulating device be connected to described collimating apparatus along its end longitudinally, and can vertically move along the direction that is approximately perpendicular to described collimating slit; And
Second regulating device, described second regulating device be connected to described collimating apparatus along its other end longitudinally, and can vertically move along the direction that is approximately perpendicular to described collimating slit,
In wherein said first, second regulating device each comprises:
Gearing, described gearing are connected with described collimating apparatus to drive described collimating apparatus vertical motion; And drive unit, described drive unit comprises drive motor, is used to drive described gearing,
Wherein said gearing comprises:
Nut, described nut is connected with described collimating apparatus;
With the screw rod that described nut matches, described screw rod links to each other with drive screw turns, wherein with drive motor:
When drive motor drove the screw rod rotation, the nut that matches with described screw rod produced vertical motion, to drive described collimating apparatus vertical motion.
2. collimator adjustment according to claim 1 system is characterized in that also comprising:
Shielding box, described shielding box are arranged on described collimating apparatus outside with the described collimating apparatus of basic coating, and have opening disposed thereon and that align with the collimating slit of collimating apparatus.
3. collimator adjustment according to claim 1 system is characterized in that:
Described drive motor is stepper motor or servomotor.
4. collimator adjustment according to claim 3 system is characterized in that described gearing further comprises the pivot unit, and it comprises:
First web member that extends out from the end of described nut;
Second web member that is fastenedly connected with described collimating apparatus; And
Bearing pin, described bearing pin run through described first, second web member, so that described first, second web member can rotate at predetermined angular range around described bearing pin.
5. collimator adjustment according to claim 4 system is characterized in that:
The rod member that described first web member extends out for the end from described nut; And
Described second web member is the U type seat that is fastenedly connected with described collimating apparatus,
Described rod member is contained in the cavity of described U type seat, and described bearing pin runs through described rod member and U type seat, so that described rod member and U type seat can rotate at predetermined angular range around described bearing pin.
6. collimator adjustment according to claim 2 system is characterized in that:
Described nut is slidingly connected by axle sleeve and the formation of described shielding box that is arranged on the shielding box, so that described nut can vertically produce sliding motion with respect to described shielding box.
7. collimator adjustment according to claim 1 system is characterized in that:
The degree of regulation of described gearing at 0.01mm between the 1mm.
8. collimator adjustment according to claim 1 system is characterized in that:
The degree of regulation of described gearing is 0.05mm.
9. collimator adjustment according to claim 1 system is characterized in that:
The degree of regulation of described screw rod, nut is 0.05mm.
10. collimator adjustment according to claim 2 system is characterized in that also comprising:
Be arranged on the apical position sensor of the apical position that is used to detect and limit described collimating apparatus on the described shielding box; And
Be arranged on the bottom position sensor of the bottom position that is used to detect and limit described collimating apparatus on the described shielding box.
11. collimator adjustment according to claim 10 system is characterized in that:
In described apical position sensor and the described bottom position sensor each is near switch or microswitch.
12. collimator adjustment according to claim 10 system is characterized in that also comprising:
Controller, it is used for controlling in response to operator's input or computer instruction the motion of first, second regulating device, and then the position of collimation device is regulated.
13. collimator adjustment according to claim 12 system is characterized in that:
Also be provided with catch on the described collimating apparatus,
When the described catch on the collimating apparatus triggered in described apical position sensor and the described bottom position sensor one, first, second regulating device controlled by described controller so that its stop motion, and then makes the collimating apparatus stop motion.
14. collimator adjustment according to claim 2 system is characterized in that also comprising bias unit, described bias unit is arranged on and is used on the described shielding box applying bias power to described collimating apparatus, to guarantee the degree of regulation between screw rod and the nut.
15. collimator adjustment according to claim 14 system is characterized in that described bias unit comprises:
Be connected to the spring on the described shielding box;
The web joint integrally formed or that extend out from described collimating apparatus with collimating apparatus;
Be arranged on the push rod between described spring and the described web joint,
Its medi-spring is applied to bias power on the described collimating apparatus by push rod.
16. a method of regulating the collimator system of radiation detection system, wherein said radiation detection system comprises: radiation source, collimator adjustment system as claimed in claim 1 and detector is characterized in that described method comprises step:
(a) by first, second regulating device with collimator positioner to its initial adjustment position, and determine along the longitudinal direction first, second of described collimating apparatus terminal and with first, second measuring positions of two corresponding detectors of end of described collimating apparatus;
(b) obtain radiation detection data on first, second measuring position of first, second terminal corresponding detector of described initial adjustment position and described collimating apparatus;
(c) repeat described first, second regulating device of driven in synchronism, vertically move down predetermined displacement to a plurality of subsequent adjustment position to drive described collimating apparatus, obtain a plurality of radiation detection data on described first, second measuring position simultaneously, arrive its terminal adjusting position up to described collimator positioner;
(d) the whole radiation detection data on first, second measuring position of comparison, to determine that respectively first, second maximum on first, second measuring position detects data, determine to detect with described first, second maximum in described initial adjustment position and the described a plurality of subsequent adjustment position first, second selection adjusting position of the corresponding described collimating apparatus of data simultaneously;
(e) control first, second regulating device respectively and navigate to first, second selection adjusting position respectively with described first, second end with collimating apparatus.
17. the method that is used to regulate the collimator system of radiation detection system according to claim 16 is characterized in that:
Described initial adjustment position is the apical position of described collimating apparatus, and described terminal adjusting position is the bottom position of described collimating apparatus.
18. the method that is used to regulate the collimator system of radiation detection system according to claim 16 is characterized in that:
Described initial adjustment position is the bottom position of described collimating apparatus, and described terminal adjusting position is the apical position of described collimating apparatus.
19. the method that is used to regulate the collimator system of radiation detection system according to claim 16 is characterized in that:
Described drive motor is stepper motor or servomotor.
20. the method that is used to regulate the collimator system of radiation detection system according to claim 16 is characterized in that:
The predetermined displacement that described collimating apparatus moves at every turn at 0.01mm between the 1mm.
21. the method that is used to regulate the collimator system of radiation detection system according to claim 20 is characterized in that:
The predetermined displacement that described collimating apparatus moves at every turn is 0.05mm.
22. the method that is used to regulate the collimator system of radiation detection system according to claim 16 also comprises step:
Be provided for detecting and limit the apical position sensor of the apical position of described collimating apparatus; And
Be provided for detecting and limit the bottom position sensor of the bottom position of described collimating apparatus,
When described apical position sensor or described bottom position sensor were triggered by described collimating apparatus, first, second regulating device controlled by described controller so that its stop motion, and then makes the collimating apparatus stop motion.
23. the method that is used to regulate the collimator system of radiation detection system according to claim 22 also comprises step:
In described apical position sensor and the described bottom position sensor each is near switch or microswitch.
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| CN 200810056060 CN101482653B (en) | 2008-01-11 | 2008-01-11 | Regulating system and method for collimating device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102419600A (en) * | 2011-11-29 | 2012-04-18 | 济南德佳玻璃机器有限公司 | Automatic angle adjusting device and angle adjusting method |
| CN105223211A (en) | 2015-11-06 | 2016-01-06 | 同方威视技术股份有限公司 | Collimator apparatus and ray inspection arrangement |
| CN106500964B (en) * | 2016-12-30 | 2019-03-15 | 上海中科光纤通讯器件有限公司 | The hot spot machine debugging system and method for middle long reach single mode single optical fiber calibrator |
| CN111221022A (en) * | 2020-03-13 | 2020-06-02 | 山西医科大学第一医院 | Radiation dose check out test set and access control system |
| CN114764069A (en) * | 2020-12-31 | 2022-07-19 | 同方威视技术股份有限公司 | Radiation inspection system |
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