CN102809386A - Device and method for detecting angular position of ball tube in equipment - Google Patents
Device and method for detecting angular position of ball tube in equipment Download PDFInfo
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- CN102809386A CN102809386A CN2011101431523A CN201110143152A CN102809386A CN 102809386 A CN102809386 A CN 102809386A CN 2011101431523 A CN2011101431523 A CN 2011101431523A CN 201110143152 A CN201110143152 A CN 201110143152A CN 102809386 A CN102809386 A CN 102809386A
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Abstract
The invention relates to the field of medical equipment, in particular to a device for detecting the angular position of a ball tube in equipment. The equipment comprises a rotating part and a stationary part; the device comprises a plurality of sensing parts, a first position sensor and a second position sensor; the peripheral surface of the rotating part consists of two parts, i.e. a first part peripheral surface on which the plurality of sensing parts are installed and a second part peripheral surface on which the sensing parts are not installed, wherein the first part peripheral surface is at least a half of the peripheral surface of the rotating part; the first position sensor and the second position sensor are arranged on the stationary part at a certain distance; and the distance is at least a distance between the two adjacent sensing parts. The invention further provides a method for detecting the angular position of the ball tube in the equipment. The device and the method have the benefits that the existing AP sampling rate is doubled under the situation that the number of the existing sensing parts is not doubled, and closed-loop control carried out on the rotation of a machine frame is further realized.
Description
Technical field
The present invention relates to field of medical, the apparatus and method of bulb angle position in particularly a kind of detection one equipment.
Background technology
At X ray computer fault imaging (Computed Tomography; CT) in the equipment; (angular position is an important parameter of image reconstruction and system control AP), and AP not only can influence final image quality in the angle position of X ray bulb in the single rotary course; Also can influence Spin Control to the CT frame, and then the stability of influence scanning.Therefore it is very important in scanning process, accurately controlling AP; And to control the AP information that AP at first will obtain X ray bulb in the single sweep operation process, adopt following mode to obtain at present in the CT equipment usually: to utilize the position transducer and the inductive means on the rotating part that are installed on the CT frame stationary part to come the AP of bulb is sampled.
Consider the cost problem, the AP sampled point is quite few in low side CT equipment.As shown in Figure 1, be the device of the detection AP that uses in the present low side CT equipment.Wherein CT equipment comprises frame 10, is positioned at the X ray bulb 1 and the detecting device 12 of rotary frame, and object to be checked is arranged in frame hole 11; The AP pick-up unit comprises a plurality of ferrule 5
1, 5
25n (metal head), primary importance sensor 2, second place sensor 3, the 3rd position transducer 4 and a groove 6 (slot); Wherein ferrule 5, groove 6 place on the rotary frame; A plurality of (as 24) ferrule 5 equally spaced, to be arranged in about frame rotation center symmetrical manner on the circumference of 360 ° of rotary frames; 2,3,4 of position transducers are positioned on the stationary parts 15 of frame; And primary importance sensor 2 is being close to second place sensor 3 and is arranging, the 3rd position transducer 4 is arranged with the distance of the ferrule 5n in second place sensor 3 intervals.Here position transducer 2 can respectively form one near switch with ferrule 5i, position transducer 4 with groove 6 with any ferrule 5i (i is a positive integer), position transducer 3; When ferrule or fillistered joint near position sensor during to certain distance; Position transducer just has " induction "; Just can move near switch,, cry " detecting distance " this distance usually as producing high level signal " 1 " or low level signal " 0 ".Every kind of distance that detects near switch is fixed, and different types of it detects apart from also be not quite similar near switch.
As shown in Figure 2, after X ray bulb 1 rotates a circle, the pulse train AP that position transducer 2 generations one have cycle T
0, the pulse train AP that position transducer 3 generations one have cycle T
90, position transducer 4 produces one with frame rotational time/X ray bulb rotational time T
RotIndividual pulse IP for the cycle.So as far as AP sampling, the blank Δ α of the angle between a plurality of ferrule is that the quantity N by ferrule decides, shown in formula (1):
The blank Δ α of angle that utilizes 24 ferrule to gather the AP information among Fig. 1 is 360 °/24=15 °, and this angle blank is too big, so often obtain final AP information through between adjacent two sampled points, carrying out interpolation in the practical operation.Also there is very big limitation in but this method for improving the accuracy rate and the image quality that detect AP.
Pulse train AP
0And AP
90Cycle T be quantity N and frame rotational time T by ferrule
RotDecide, shown in formula (2):
In the single sweep operation of conventional CT equipment; If realize closed-loop control to the frame rotation; The then minimum sampling rate that needs 48 of revolutions; And only be provided with 24 sampled points in the present low side CT equipment shown in Figure 1, thus can't realize closed-loop control comparatively accurately to the rotation of frame, and open loop control has very big restriction to the frame stability of rotation.For this reason, in the CT high-end devices, utilize high frequency sampling (for example 96 sampled points) to detect AP, yet consider that sampled point increases the cost that brings and improves problem, can't on low side CT equipment, also carry out such design.
Summary of the invention
The object of the present invention is to provide the device of bulb angle position in a kind of detection one equipment, thereby under the situation of the existing inductive means number of undouble, double existing AP sampling rate, and further realize closed-loop control rotary frame.
In view of this; The present invention proposes the device of bulb angle position in a kind of detection one equipment; Said equipment comprises rotary part and stationary parts; Said device comprises a plurality of inductive means, a primary importance sensor and a second place sensor; When the distance of an inductive means and said primary importance sensor reach first detect apart from the time; Said primary importance sensor can produce one first response signal, when the distance of an inductive means and said second place sensor reach said first detect apart from the time, said second place sensor can produce one second response signal; The side face of said rotary part is made up of two parts: first's side face of said a plurality of inductive means is installed and the second portion side face of said inductive means is not installed, wherein said first side face is at least half side face of said rotary part; Said primary importance sensor and said second place sensor are separated by a distance to be arranged on the said stationary parts, and this distance is at least the distance between adjacent two inductive means.So just can under the situation of the number of the existing inductive means number of undouble, double existing AP sampling rate.
According to one embodiment of present invention, said first's side face and said second portion side face are arranged with the rotation center symmetrical manner about said rotary part.So just can under the situation that need not extra increase inductive means number, double existing AP sampling rate.
According to another embodiment of the invention, said inductive means equally spaced is arranged on the said first side face.This arrangement is simple relatively, and can obtain the AP signal of rule.
According to still another embodiment of the invention, said primary importance sensor and second place sensor are arranged with the rotation center symmetrical manner about said rotary part.So just can under the situation that need not extra increase inductive means number, double existing AP sampling rate.
According to still a further embodiment; Said device further comprises the 3rd inductive means and the 3rd position transducer; Distance when the 3rd inductive means and the 3rd position transducer reach the 3rd detect apart from the time; The 3rd position transducer can produce one the 3rd response signal, and said the 3rd inductive means and said the 3rd position transducer make that through arranging said the 3rd response signal and first response signal can produce simultaneously in 0 ° of position of bulb.
According to still a further embodiment, said device further comprises a sense of rotation decision means, and it judges sense of rotation according to said first response signal that receives and the sequential relationship of said second response signal.
According to still a further embodiment, said device further comprises signal stack assembly, is used for said first response signal of receiving and said second response signal are superposeed.Thereby the signal according to after the stack obtains AP information, realizes closed-loop control.
The present invention also provides the method for bulb angle position in a kind of detection one equipment; Wherein said equipment comprises rotary part and stationary parts; Said device comprises a plurality of inductive means, a primary importance sensor and a second place sensor; When the distance of a said inductive means and said primary importance sensor reach first detect apart from the time; Said primary importance sensor can produce one first response signal, when the distance of a said inductive means and said second place sensor reach said first detect apart from the time, said second place sensor can produce one second response signal; Said a plurality of inductive means are installed in first's side face of said rotary part, and wherein said first side face is at least half side face of said rotary part; With said primary importance sensor with second place sensor is separated by a distance is arranged on the said stationary parts, this distance is at least the distance between adjacent two inductive means.
According to one embodiment of present invention, said first side face and said second portion side face are arranged with the rotation center symmetrical manner about said rotary part.
According to another embodiment of the invention, said inductive means equally spaced is arranged on the said first side face.
According to still a further embodiment, said primary importance sensor and second place sensor are arranged with the rotation center symmetrical manner about said rotary part.
According to still a further embodiment; Said method further comprises: one the 3rd inductive means and one the 3rd position transducer are provided; When the distance of said the 3rd inductive means and said the 3rd position transducer reach the 3rd detect apart from the time; Said the 3rd position transducer can produce one the 3rd response signal, and said the 3rd inductive means and said the 3rd position transducer are arranged such that in 0 ° of position of bulb, said the 3rd response signal and said first response signal can produce simultaneously.
According to still a further embodiment, said method further comprises: a sense of rotation decision means is provided, and it judges sense of rotation according to said first response signal that receives and the sequential relationship of said second response signal.
According to still a further embodiment, said method further comprises: signal stack assembly is provided, is used for said first response signal of receiving and said second response signal are superposeed.
From such scheme, can find out; Compare prior art; The present invention can be at the existing inductive means number of undouble, even do not change under the situation of inductive means number and position transducer number, doubles existing AP sampling rate through the arrangement that changes position transducer and inductive means, brings up to 48 sampled points of revolution as having among the low side CT 24 sampled points of revolution now; Thereby realize closed-loop control, and further improved image quality and frame stability of rotation the frame rotation.
Description of drawings
To make clearer above-mentioned and other feature and advantage of the present invention of those skilled in the art through describing embodiments of the invention in detail below with reference to accompanying drawing, in the accompanying drawing:
Fig. 1 is for detecting X ray bulb AP schematic representation of apparatus in the existing CT equipment.
Fig. 2 a is a frame when turning clockwise, three AP signal schematic representations that position transducer produces separately.
Fig. 2 b is a frame when being rotated counterclockwise, three AP signal schematic representations that position transducer produces separately.
When Fig. 3 a is positioned at 0 ° of position for the X ray bulb, the arrangement of three position transducers and a plurality of inductive means and the synoptic diagram of present position.
When Fig. 3 b is positioned at 180 ° of positions for the X ray bulb, the synoptic diagram of a plurality of inductive means present position.
Fig. 4 detects another embodiment synoptic diagram of X ray bulb AP device for the present invention.
Fig. 5 detects another embodiment synoptic diagram of X ray bulb AP device for the present invention.
Fig. 6 is for clockwise or when being rotated counterclockwise; The synoptic diagram of the AP signal of the position of inductive means and three position transducer generations among the present invention; When wherein Fig. 6 a and Fig. 6 c have illustrated that frame turns clockwise, the residing position of a plurality of inductive means and three AP signal schematic representations that position transducer produces separately; When Fig. 6 b and Fig. 6 d have illustrated that frame is rotated counterclockwise, the residing position of a plurality of inductive means and three AP signal schematic representations that position transducer produces separately.
Reference numeral
The 1X ray tube
2 primary importance sensors
3,8 second place sensors
4 the 3rd position transducers
5
1, 5
2The a plurality of ferrule of 5n
6 grooves
10 frames
11 frame holes
12 detecting devices
13, the second portion side face of 13 ' rotary part
14, first's side face of 14 ' rotary part
15 stationary parts
Embodiment
For making the object of the invention, technical scheme and advantage clearer, below lift embodiment to further explain of the present invention.
Fig. 2 is the AP signal schematic representation that detects three position transducers generations of AP device in the present low side CT equipment shown in Figure 1; Wherein Fig. 2 a is that frame is when turning clockwise; Three AP signal schematic representations that position transducer produces separately; Fig. 2 b is a frame when being rotated counterclockwise, three AP signal schematic representations that position transducer produces separately.
As shown in Figure 1, position transducer 2 can respectively form one near switch with ferrule 5, position transducer 4 with groove 6 with ferrule 5, position transducer 3.When the distance of ferrule 5 and position transducer 2 or 3 arrive first detect apart from the time (for example≤4mm); On off state near switch is arranged to " opening " state; So position transducer 2 or 3 outputs, one response signal, like high level signal " 1 ", otherwise output low level signal " 0 "; Position transducer 4 then is " opening " state with groove 6 compositions near switch always; Promptly export high level signal " 1 " always; Until the distance of groove 6 and position transducer 4 arrive the 3rd detect apart from the time, just can export the response signal of a low level signal " 0 ".
Here, 0 ° of location definition of X ray bulb 1 is: the X ray bulb is in this position, and position transducer 2 is exported high level signal and position transducer 4 synchronous output low level signals.Here with ferrule 5
1As the sign ferrule, when the X ray bulb is in 0 ° of position, sign ferrule 5
1Reach first with the distance of position transducer 2 and detect distance, make position transducer 2 produce first response signal AP
0,1, like high level signal " 1 ", the distance of while groove 6 and position transducer 4 also reaches the 3rd and detects distance, and position transducer 4 also produces a response signal Rot
n, like low level signal " 0 ".Here identify ferrule 5
1With ferrule 5i is the same, only than more than 5 circle signs of ferrule, is used for distinguishing with other ferrule, can certainly identify with other modes that those skilled in the art know.Because this detection AP device has only a groove 6; So in the process that frame or X ray bulb 1 rotate a circle; Groove 6 for once chance can reach the 3rd and detects distance with the distance of position transducer 4; This moment position transducer 4 output low level signals, so can be with this sign that rotates a circle as frame or X ray bulb 1, so the response signal of position transducer 4 is represented with IP (index pulse).Visible AP among Fig. 2
0,1, AP
90,1With Rot
nPulse width inconsistent, this is because ferrule 5 and groove 6 different, so cause " induction " its position transducer difference, and then causes the duration difference of response signal.
Among Fig. 1 when X ray bulb 1 when 0 ° of position turns clockwise, the response signal of position transducer 2 outputs is AP
0, the response signal of position transducer 3 outputs is AP
90, the response signal of position transducer 4 outputs is IP.Because ferrule 5 is by certain time interval T, shifts to position transducer 2,3 one by one, therefore from sign ferrule 5
1Beginning, position transducer 2 can produce 24 high level signals successively, like AP among Fig. 2 a and Fig. 2 b
0Shown in.And therefore position transducer 3 has only sign ferrule 5 owing to separated by a distance with position transducer 2
1Be rotated clockwise to distance with position transducer 3 reach first detect apart from the time, position transducer 3 just can produce first response signal AP
90,1, like high level signal " 1 ", produce 23 high level signals successively by certain time interval T afterwards, like AP among Fig. 2 a and Fig. 2 b
90Shown in.Suppose that Δ w is the width of an AP pulse, can position transducer 2 and 3 distance be set to Δ w/2, be AP then with the synchronous pulse signal of IP
0, be AP and the signal of Δ w/2 skew is arranged
90Only illustrated AP among Fig. 2
0And AP
90A part.Rot among Fig. 2
nBe the IP signal of the n time rotation, Rot
N+1Be the IP signal of (n+1) inferior rotation, n is a positive integer.
In addition, can also be according to AP in each rotary course
0And AP
90The sequential relationship of middle output high level signal is judged the sense of rotation of frame or X ray bulb: if AP
0Early than AP
90Export high level signal earlier, then the X ray bulb is the CW rotation, otherwise, if AP
0The output high level signal is later than AP
90, then the X ray bulb is rotation counterclockwise.
Of the background technology part, at present can't realize closed-loop control comparatively accurately to the rotation of frame through the sample mode of AP information of 24 points in the low side CT equipment.
For overcoming this defective, the present invention proposes a kind of device that detects the bulb angle position, and it doubles existing AP sampled point through arranging existing position transducer and inductive means again, further realizes the closed-loop control to the frame rotation.
The device of bulb angle position can be used for comprising in the equipment of rotary part and stationary parts in detection one equipment of the present invention, is not limited to the CT equipment of field of medical.Inductive means can be aforesaid ferrule, groove or photovalve etc., and certainly position transducer will " be responded to " inductive means, thus position transducer also can be with the induction parts respective change.
Below be example with low side CT equipment, specify the device that the present invention detects AP.
The device that the present invention detects AP comprises a plurality of inductive means, a primary importance sensor and a second place sensor; The side face of rotary part is made up of two parts: first's side face of a plurality of inductive means is installed and the second portion side face of inductive means is not installed, wherein first's side face is at least half side face of rotary part; Primary importance sensor and second place sensor be separated by a distance to be arranged on the stationary parts of frame, and this distance is at least the distance between adjacent two inductive means.
Fig. 3 detects an embodiment synoptic diagram of X ray bulb AP device for the present invention.The device that detects AP among the figure comprises a plurality of ferrule 5 that are installed on the rotary frame and is installed in the primary importance sensor 2 and second place sensor 8 that is used for " induction " ferrule 5 on the frame stationary parts; The second portion side face 13 that first's side face 14 of a plurality of ferrule 5 wherein is installed and ferrule 5 is not installed is to arrange about frame rotation center symmetrical manner, and promptly first's side face 14 respectively is 1/2 of a rotary frame periphery with second portion side face 13.So compared with prior art, a plurality of ferrule 5 of the present invention are arranged on the semi-circumference of rotary frame 180 degree, rather than the wholecircle that is arranged in rotary frame 360 degree shown in Figure 1 is on week; Simultaneously primary importance sensor 2 and second place sensor 8 to be arranging about frame rotation center symmetrical manner, rather than position transducer 2 and 3 shown in Figure 1 is being close to and arranges.So just can be under the situation that does not increase existing ferrule number; Double existing AP sampling rate; As bringing up to 48 sampled points of revolution, thereby realize closed-loop control, and further improved image quality and frame stability of rotation the frame rotation from 24 sampled points of revolution.
Preferably, a plurality of ferrule of first's side face equally spaced are arranged on half side face of rotary frame.This arrangement is simple relatively, and can obtain the AP signal of rule.
In addition, the device that the present invention detects AP also comprises a groove 6 and one the 3rd position transducer 4, when the distance of groove 6 and the 3rd position transducer 4 reach the 3rd detect apart from the time, the 3rd position transducer can produce one the 3rd response signal, like low level signal.Here groove 6 is being close to sign ferrule 5
1Arrange that the 3rd position transducer 4 is being close to primary importance sensor 2 and is arranging, makes at 0 ° of position of X ray bulb, the 3rd response signal Rot
nWith the first response signal AP
0,1Can produce simultaneously.
When Fig. 3 a has illustrated that the X ray bulb is positioned at 0 ° of position, the arrangement and the present position of three position transducers 2,4,8 and a plurality of ferrule 5.Identify ferrule 5 this moment
1Reach first with the distance of primary importance sensor 2 and detect distance; So the primary importance sensor is exported a high level signal; And second place sensor 8 is not owing to have ferrule and its to detect distance apart from reaching first, so second place sensor output low level signal always.Wherein, said first detect distance less than 4mm.
When Fig. 3 b has illustrated that the X ray bulb is positioned at 180 ° of positions, the residing position of a plurality of ferrule.When the X ray bulb turns clockwise 180 ° from 0 ° of position, identify ferrule 5
1Just reach first with the distance of second place sensor 8 and detect distance, this moment, second place sensor 8 produced response signal AP
180, like high level signal " 1 ", do not detect distance because the distance of ferrule and primary importance sensor 2 all reaches first this moment, so primary importance sensor 2 beginning output low level signals continue to be rotated clockwise to sign ferrule 5 until the X ray bulb
1Reach first once more with the distance of primary importance sensor 2 and detect distance.
Fig. 4 detects another embodiment synoptic diagram of device of X ray bulb AP for the present invention.This another embodiment different with Fig. 3 just, first's side face and second portion side face are divided into the individual sub-side face of plural number respectively, the sub-side face of first's side face and the sub-side face of second portion are to arrange about frame rotation center symmetrical manner.Purpose is that when primary importance sensor 2 " induction " arrives ferrule 58 of second place sensors can't " be responded to " to any one ferrule 5i; And when second place sensor 8 " induction " ferrule 5; 2 of primary importance sensors can't " be responded to " to any one ferrule 5i; Primary importance sensor 2 replaces " induction " ferrule 5 with second place sensor 8 like this; Alternately producing high level signal, thereby double existing AP sampling rate.Thus it is clear that, embodiment illustrated in fig. 4ly still can under the situation that does not increase existing ferrule number, double existing AP sampling rate, as bringing up to 48 sampled points of revolution from 24 sampled points of revolution.
Fig. 5 detects another embodiment synoptic diagram of device of X ray bulb AP for the present invention.Different with Fig. 3 is; The number of ferrule 5 increases to some extent; The number that but increases is less than existing ferrule number N (like N=24); First's side face 14 ' that ferrule 5 is installed like this is just greater than the second portion side face 13 ' that ferrule is not installed, so first's side face 14 ' also just can't be about frame rotation center symmetry with second portion side face 13 '; And the position of second place sensor 8 also changes, and it can be positioned on the stationary parts corresponding with second portion side face 13 '.In this embodiment, though increased the number of existing ferrule, can under the situation of undouble ferrule number, double existing AP sampling rate, also practiced thrift cost.It is high slightly only to compare Fig. 3 and embodiment cost shown in Figure 4.
Fig. 6 is frame clockwise or when being rotated counterclockwise; 24 ferrule 5 residing positions and three AP signal schematic representations that position transducer produces among the present invention; When wherein Fig. 6 a and Fig. 6 c have illustrated that frame turns clockwise, a plurality of ferrule 5 residing positions and three AP signal schematic representations that position transducer produces separately; When Fig. 6 b and Fig. 6 d have illustrated that frame is rotated counterclockwise, a plurality of ferrule 5 residing positions and three AP signal schematic representations that position transducer produces separately.
Shown in Fig. 6 a, when frame turns clockwise (direction shown in arrow among the figure), tagging ferrule 5
1Beginning, ferrule 5 are by certain time interval T, shift to primary importance sensor 2 one by one, so position transducer 2 produces 24 high level signals, the AP shown in Fig. 6 c successively
0, second place sensor 8 is owing to ferrule 5 arrives ferrule 5 away from then can't " respond to " always, so its output signal AP
180It is the low level signal shown in Fig. 6 c always.Turn clockwise after 180 ° until frame; Because ferrule 5 is clockwise away from primary importance sensor 2; Make the distance of 2 of ferrule 5 and primary importance sensors detect distance greater than first; Primary importance sensor 2 output low level signals are until this end of scan since then, and second place sensor 8 then arrives ferrule 5 because of clockwise approaching " induction " of ferrule 5, begins to export high level signal AP
180, AP wherein
180, lastAP during for last scan
180Last high level response signal.And groove 6 and the 3rd position transducer 4 in 0 ° of position of X ray bulb, produce low level response signal Rot as the origin identification of rotation sweep
n, the IP shown in Fig. 6 c.
Otherwise; Shown in Fig. 6 b, when frame is rotated counterclockwise (direction shown in the arrow in figure), because ferrule 5 is by certain time interval T, shift to second place sensor 8 one by one; Therefore position transducer 8 can produce 24 high level signals, the AP shown in Fig. 6 d successively
180, primary importance sensor 2 then since ferrule 5 away from then can't " responding to " to ferrule 5, so its output signal AP
0It is the low level signal shown in Fig. 6 d always.After frame is rotated counterclockwise 180 °; Because ferrule 5 is counterclockwise away from second place sensor 8; Make the distance of 8 of ferrule 5 and second place sensors detect distance greater than first; Straight this end of scan of second place sensor 2 output low level signals since then, primary importance sensor 2 then because of ferrule 5 arrive ferrule 5 near " induction " counterclockwise, begin to export high level signal AP
0Because the origin identification of single rotation sweep is among the present invention: AP
0High level signal and the low level signal synchronized generation of IP, so AP among Fig. 6 d
0, lastBe the signal of primary importance sensor 2 outputs, identify ferrule 5 this moment in 0 ° of position of X ray bulb
1Reach first with the distance of primary importance sensor and detect distance, after this just counterclockwise away from primary importance sensor 2.AP
180,1When being rotated counterclockwise for frame, first high level signal of second place sensor 8 outputs.
Further, the device that the present invention detects AP also comprises a kind of sense of rotation decision means, and it is according to the first response signal AP
0With the second response signal AP
180Sequential relationship judge sense of rotation.Like 0 ° of position, according to AP from X ray bulb 1
0And AP
180The middle sequential relationship that produces high level signal just can be judged the sense of rotation of X ray bulb: if AP
0After exporting high level signal continuously, AP
180Export high level signal again, then X ray bulb or frame are the CW rotation, shown in Fig. 6 c; Otherwise, if AP
0Only export a high level signal, then AP
180Export high level signal, AP then continuously
0Export high level signal more continuously, then X ray bulb or frame are rotation counterclockwise, shown in Fig. 6 d.
Further, the device that the present invention detects AP also comprises a kind of signal stack assembly, is used for the first response signal AP
0With the second response signal AP
180Superpose.AP sampled signal after the stack becomes 48 from existing 24 like this, so the blank Δ α of angle is 360 °/48=7.5 °, this angle blank is compared 15 ° of the prior art and improved a lot, thereby can realize closed-loop control that frame is rotated.
The present invention also provides the method for bulb angle position in a kind of detection one equipment, and it comprises:
At first, said a plurality of inductive means are installed in first's side face of said rotary part, wherein said first side face is at least half side face of said rotary part;
Then, with said primary importance sensor with second place sensor is separated by a distance is arranged on the said stationary parts, this distance is at least the distance between adjacent two inductive means.
Further, said method comprises:
One the 3rd inductive means and one the 3rd position transducer are provided; When the distance of said the 3rd inductive means and said the 3rd position transducer reach the 3rd detect apart from the time; Said the 3rd position transducer can produce one the 3rd response signal; And said the 3rd inductive means and said the 3rd position transducer are arranged such that in 0 ° of position of bulb, said the 3rd response signal and said first response signal can produce simultaneously.
Further, said method comprises:
One sense of rotation decision means is provided, and it judges sense of rotation according to said first response signal that receives and the sequential relationship of said second response signal.
Further, said method comprises: signal stack assembly is provided, is used for said first response signal of receiving and said second response signal are superposeed.
According to one embodiment of present invention, said first side face and said second portion side face are arranged with the rotation center symmetrical manner about said rotary part.
According to another embodiment of the invention, said inductive means equally spaced is arranged on the said first side face.
According to still a further embodiment, said primary importance sensor and second place sensor are arranged with the rotation center symmetrical manner about said rotary part.
The present invention relates to the device of bulb angle position in a kind of detection one equipment; Said equipment comprises rotary part and stationary parts; Said device comprises a plurality of inductive means, a primary importance sensor and a second place sensor; When the distance of inductive means and primary importance sensor reach first detect apart from the time; The primary importance sensor can produce one first response signal, when the distance of inductive means and second place sensor reach said first detect apart from the time, second place sensor can produce one second response signal; The side face of said rotary part is made up of two parts: first's side face of a plurality of said inductive means is installed and the second portion side face of said inductive means is not installed, wherein said first side face is at least half side face of said rotary part; Said primary importance sensor and second place sensor are separated by a distance to be arranged on the said stationary parts, and this distance is at least the distance between adjacent two inductive means.。The present invention also provides the method for bulb angle position in a kind of detection one equipment.Thereby can under the situation of the existing inductive means number of undouble, double existing AP sampling rate, and realize closed-loop control the frame rotation.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (14)
1. device that detects bulb angle position in the equipment, said equipment comprises rotary part and stationary parts (15), said device comprises a plurality of inductive means (5
1, 5
25n), a primary importance sensor (2) and a second place sensor (8); When the distance of a said inductive means and said primary importance sensor (2) reach first detect apart from the time; Said primary importance sensor (2) can produce one first response signal, when the distance of a said inductive means and said second place sensor (8) reach said first detect apart from the time, said second place sensor (8) can produce one second response signal; It is characterized in that
The side face of said rotary part is made up of two parts: first's side face (14) of said a plurality of inductive means is installed and the second portion side face (13) of said inductive means is not installed, wherein said first side face is at least half side face of said rotary part;
Said primary importance sensor (2) and second place sensor (8) are separated by a distance to be arranged on the said stationary parts (15), and this distance is at least the distance between adjacent two inductive means.
2. device according to claim 1 is characterized in that, said first side face (14) and said second portion side face (13) are arranged with the rotation center symmetrical manner about said rotary part.
3. device according to claim 1 is characterized in that, said inductive means equally spaced is arranged on the said first side face (14).
4. device according to claim 1 is characterized in that, said primary importance sensor (2) and second place sensor (8) are arranged with the rotation center symmetrical manner about said rotary part.
5. device according to claim 1; It is characterized in that; Said device further comprises the 3rd inductive means (6) and the 3rd position transducer (4); When the distance of said the 3rd inductive means (6) and said the 3rd position transducer (4) reach the 3rd detect apart from the time; Said the 3rd position transducer (4) can produce one the 3rd response signal, and said the 3rd inductive means (6) makes that through layout in 0 ° of position of bulb, said the 3rd response signal and said first response signal can produce simultaneously with said the 3rd position transducer (4).
6. device according to claim 1 is characterized in that, said device further comprises a sense of rotation decision means, and it judges sense of rotation according to said first response signal that receives and the sequential relationship of said second response signal.
7. device according to claim 1 is characterized in that, said device further comprises signal stack assembly, is used for said first response signal of receiving and said second response signal are superposeed.
8. method that detects bulb angle position in the equipment, wherein said equipment comprises rotary part and stationary parts (15), said device comprises a plurality of inductive means (5
1, 5
25n), a primary importance sensor (2) and a second place sensor (8); When the distance of a said inductive means and said primary importance sensor (2) reach first detect apart from the time; Said primary importance sensor (2) can produce one first response signal, when the distance of a said inductive means and said second place sensor (8) reach said first detect apart from the time, said second place sensor (8) can produce one second response signal; It is characterized in that
Said a plurality of inductive means are installed in first's side face (14) of said rotary part, and wherein said first side face is at least half side face of said rotary part;
With said primary importance sensor (2) with second place sensor (8) is separated by a distance is arranged on the said stationary parts (15), this distance is at least the distance between adjacent two inductive means.
9. method according to claim 8 is characterized in that, said first side face (14) and said second portion side face (13) are arranged with the rotation center symmetrical manner about said rotary part.
10. method according to claim 8 is characterized in that, said inductive means equally spaced is arranged on the said first side face (14).
11. method according to claim 8 is characterized in that, said primary importance sensor (2) and second place sensor (8) are arranged with the rotation center symmetrical manner about said rotary part.
12. method according to claim 8 is characterized in that, said method further comprises:
One the 3rd inductive means (6) and one the 3rd position transducer (4) are provided; When the distance of said the 3rd inductive means (6) and said the 3rd position transducer (4) reach the 3rd detect apart from the time; Said the 3rd position transducer (4) can produce one the 3rd response signal; And said the 3rd inductive means (6) and said the 3rd position transducer (4) are arranged such that in 0 ° of position of bulb, said the 3rd response signal and said first response signal can produce simultaneously.
13. method according to claim 8 is characterized in that, said method further comprises:
One sense of rotation decision means is provided, and it judges sense of rotation according to said first response signal that receives and the sequential relationship of said second response signal.
14. method according to claim 8 is characterized in that, said method further comprises:
One signal stack assembly is provided, is used for said first response signal of receiving and said second response signal are superposeed.
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| CN102809386B (en) | 2015-06-24 |
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