CN102809386B - 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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- CN102809386B CN102809386B CN201110143152.3A CN201110143152A CN102809386B CN 102809386 B CN102809386 B CN 102809386B CN 201110143152 A CN201110143152 A CN 201110143152A CN 102809386 B CN102809386 B CN 102809386B
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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 device, particularly a kind of apparatus and method detecting bulb angle position in an equipment.
Background technology
At X ray computer fault imaging (Computed Tomography, CT) in equipment, angle position (the angular position of X ray bulb in single rotary course, AP) be an important parameter of image reconstruction and Systematical control, AP not only can affect final image quality, also can affect and the rotation of CT frame is controlled, and then the stability of impact scanning.Therefore in scanning process, accurate control AP is very important, and first to obtain the AP information of X ray bulb in single sweep operation process by control AP, usually obtain in the following way in current CT equipment: utilize the position transducer that is arranged on CT frame stationary part and the AP of inductive means to bulb on rotating part to sample.
Consider Cost Problems, in low side CT equipment, AP sampled point is quite few.As shown in Figure 1, the device of detection AP for using in current low side CT equipment.Wherein CT equipment comprises frame 10, is positioned at the X ray bulb 1 of rotary frame and detecting device 12, and object to be checked is arranged in machine frame hole 11, AP pick-up unit comprises a plurality of ferrule 5
1, 5
25n (metal head), primary importance sensor 2, second place sensor 3, 3rd position transducer 4 and a groove 6 (slot), wherein ferrule 5, groove 6 is placed on rotary frame, a plurality of (as 24) ferrule 5 equally spaced, to be arranged in rotary frame 360 ° circumferentially about the mode of frame rotation center symmetry, position transducer 2, 3, 4 are positioned on the stationary parts 15 of frame, and primary importance sensor 2 and second place sensor 3 abutted to layout, the distance of the 3rd position transducer 4 and the ferrule 5n in second place sensor 3 interval is arranged.Here position transducer 2 can respectively form a proximity switch with ferrule 5i, position transducer 4 with groove 6 with any one ferrule 5i (i is positive integer), position transducer 3, when ferrule or fillistered joint near position sensor are to certain distance, position transducer just has " induction ", proximity switch just meeting action, as produced high level signal " 1 " or low level signal " 0 ", usually this distance is named " detecting distance ".The distance that detects of often kind of proximity switch is fixing, different types of proximity switch its detect distance be also not quite similar.
As shown in Figure 2, after X ray bulb 1 rotates a circle, position transducer 2 produces the pulse train AP that has cycle T
0, position transducer 3 produces the pulse train AP that has cycle T
90, position transducer 4 produces one with gantry rotation times/X ray bulb rotational time T
rotfor the individual pulse IP in cycle.So for AP sampling, the blank Δ α of the angle between a plurality of ferrule is decided by the quantity N of ferrule, as shown in formula (1):
The blank Δ α of angle utilizing 24 ferrule to gather AP information in Fig. 1 is 360 °/24=15 °, and this angle blank is too large, so usually through carrying out interpolation to obtain final AP information between adjacent two sampled points in practical operation.But also there is very large limitation for the accuracy rate and image quality improving detection AP in this method.
Pulse train AP
0and AP
90cycle T be by the quantity N of ferrule and gantry rotation times T
rotdecide, as shown in formula (2):
In the single sweep operation of conventional CT device, if realize the closed-loop control rotated frame, then minimumly need the sampling rate often turning at 48, and be only provided with 24 sampled points in current low side CT equipment shown in Fig. 1, so cannot realize closed-loop control comparatively accurately to the rotation of frame, and opened loop control has very large restriction to the stability that frame rotates.For this reason, in CT high-end devices, utilize high frequency sampling (such as 96 sampled points) to detect AP, but consider that sampled point increases the cost brought and improves problem, on low side CT equipment, also cannot 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, thus when the existing inductive means number of undouble, double existing AP sampling rate, and realize the closed-loop control to rotary frame further.
In view of this, the present invention proposes the device of bulb angle position in a kind of detection one equipment, described equipment comprises rotary part and stationary parts, described device comprises a plurality of inductive means, a primary importance sensor and a second place sensor, when the distance of an inductive means and described primary importance sensor reach first detect distance time, described primary importance sensor can produce one first response signal, when the distance of an inductive means and described second place sensor reach described first detect distance time, described second place sensor can produce one second response signal, the side face of described rotary part is made up of two parts: be provided with the Part I side face of described a plurality of inductive means and do not install the Part II side face of described inductive means, wherein said Part I side face is at least the half side face of described rotary part, described primary importance sensor and described second place sensor is separated by a distance is arranged on described stationary parts, this distance is at least the distance between adjacent two inductive means.So just when the number of the existing inductive means number of undouble, existing AP sampling rate can be doubled.
According to one embodiment of present invention, described Part I side face and described Part II side face are arranged in the mode of the rotation center symmetry about described rotary part.So just when without the need to additionally increasing inductive means number, existing AP sampling rate can be doubled.
According to another embodiment of the invention, described inductive means is equally spaced arranged on described Part I side face.This arrangement is relatively simple, and can obtain the AP signal of rule.
According to still another embodiment of the invention, described primary importance sensor and second place sensor are arranged in the mode of the rotation center symmetry about described rotary part.So just when without the need to additionally increasing inductive means number, existing AP sampling rate can be doubled.
According to still a further embodiment, described device comprises the 3rd inductive means and the 3rd position transducer further, distance when the 3rd inductive means and the 3rd position transducer reaches the 3rd when detecting distance, 3rd position transducer can produce one the 3rd response signal, and described 3rd inductive means and described 3rd position transducer make in bulb 0 ° of position through arranging, described 3rd response signal and the first response signal can produce simultaneously.
According to still a further embodiment, described device comprises a sense of rotation decision means further, and it judges sense of rotation according to the sequential relationship of described first response signal received and described second response signal.
According to still a further embodiment, described device comprises a Signal averaging assembly further, for described first response signal received and described second response signal being superposed.Thus obtain AP information according to the signal after superposition, realize 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, described device comprises a plurality of inductive means, a primary importance sensor and a second place sensor, when the distance of a described inductive means and described primary importance sensor reach first detect distance time, described primary importance sensor can produce one first response signal, when the distance of a described inductive means and described second place sensor reach described first detect distance time, described second place sensor can produce one second response signal, described a plurality of inductive means is arranged on the Part I side face of described rotary part, wherein said Part I side face is at least the half side face of described rotary part, by described primary importance sensor with second place sensor is separated by a distance is arranged on described stationary parts, this distance is at least the distance between adjacent two inductive means.
According to one embodiment of present invention, described Part I side face and described Part II side face are arranged in the mode of the rotation center symmetry about described rotary part.
According to another embodiment of the invention, described inductive means is equally spaced arranged on described Part I side face.
According to still a further embodiment, described primary importance sensor and second place sensor are arranged in the mode of the rotation center symmetry about described rotary part.
According to still a further embodiment, described method comprises further: provide one the 3rd inductive means and one the 3rd position transducer, when the distance of described 3rd inductive means and described 3rd position transducer reach the 3rd detect distance time, described 3rd position transducer can produce one the 3rd response signal, and described 3rd inductive means and described 3rd position transducer are arranged so that, in bulb 0 ° of position, described 3rd response signal and described first response signal can produce simultaneously.
According to still a further embodiment, described method comprises further: provide a sense of rotation decision means, and it judges sense of rotation according to the sequential relationship of described first response signal received and described second response signal.
According to still a further embodiment, described method comprises further: provide a Signal averaging assembly, for described first response signal received and described second response signal being superposed.
As can be seen from such scheme, compared to existing technology, the present invention can when the existing inductive means number of undouble, even change inductive means number and position transducer number, existing AP sampling rate is doubled by the arrangement changing position transducer and inductive means, as brought up to often turn 48 sampled points by often turning 24 sampled points in existing low side CT, thus the closed-loop control realized frame rotation, and further increase the stability of image quality and frame rotation.
Accompanying drawing explanation
Embodiments of the invention will be described in detail by referring to accompanying drawing below, make clearer above-mentioned and other feature and advantage of the present invention of those skilled in the art, in accompanying drawing:
Fig. 1 is the schematic diagram detecting X ray bulb AP device in existing CT equipment.
Fig. 2 a is frame when turning clockwise, the AP signal schematic representation that three position transducers produce separately.
Fig. 2 b is frame when being rotated counterclockwise, the AP signal schematic representation that three position transducers produce separately.
Fig. 3 a is X ray bulb when being positioned at 0 ° of position, three position transducers and the arrangement of a plurality of inductive means and the schematic diagram of present position.
Fig. 3 b is X ray bulb when being positioned at 180 ° of positions, the schematic diagram of a plurality of inductive means present position.
Fig. 4 is another embodiment schematic diagram that the present invention detects X ray bulb AP device.
Fig. 5 is another embodiment schematic diagram that the present invention detects X ray bulb AP device.
Fig. 6 is for clockwise or when being rotated counterclockwise, the schematic diagram of the position of inductive means and the AP signal of three position transducer generations in the present invention, wherein Fig. 6 a and Fig. 6 c illustrates frame when turning clockwise, the AP signal schematic representation that the position residing for a plurality of inductive means and three position transducers produce separately; Fig. 6 b and Fig. 6 d illustrates frame when being rotated counterclockwise, the AP signal schematic representation that the position residing for a plurality of inductive means and three position transducers produce separately.
Reference numeral
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 machine frame holes
12 detecting devices
13, the Part II side face of 13 ' rotary part
14, the Part I side face of 14 ' rotary part
15 stationary parts
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, the present invention is described in more detail by the following examples.
Fig. 2 is the AP signal schematic representation that three position transducers detecting AP device in current low side CT equipment shown in Fig. 1 produce, wherein Fig. 2 a is that frame is when turning clockwise, the AP signal schematic representation that three position transducers produce separately, Fig. 2 b is frame when being rotated counterclockwise, the AP signal schematic representation that three position transducers produce separately.
As shown in Figure 1, position transducer 2 can respectively form a proximity switch with ferrule 5, position transducer 4 with groove 6 with ferrule 5, position transducer 3.When ferrule 5 and the distance of position transducer 2 or 3 arrive first detect distance time (such as≤4mm), the on off state of proximity switch is arranged to "On" state, so position transducer 2 or 3 exports a response signal, as high level signal " 1 ", otherwise output low level signal " 0 "; The proximity switch that position transducer 4 and groove 6 form is then "On" state always, namely export high level signal " 1 " always, until groove 6 and the distance of position transducer 4 arrive the 3rd when detecting distance, the response signal of a low level signal " 0 " just can be exported.
Here, 0 ° of position of X ray bulb 1 is defined as: X ray bulb is in this position, and position transducer 2 exports high level signal and position transducer 4 synchronism output low level signal.Here by ferrule 5
1as coding metal head, when X ray bulb is in 0 ° of position, coding metal head 5
1reach first with the distance of position transducer 2 and detect distance, make position transducer 2 produce first response signal AP
0,1, as high level signal " 1 ", simultaneously groove 6 also reaches the 3rd with the distance of position transducer 4 and detects distance, and position transducer 4 also produces a response signal Rot
n, as low level signal " 0 ".Here coding metal head 5
1be the same with ferrule 5i, only than ferrule more than 5 circles marks, be used for distinguishing with other ferrule, can certainly identify by other modes that those skilled in the art know.Because this detection AP device only has a groove 6, so in the process rotated a circle in frame or X ray bulb 1, groove 6 for once chance can reach the 3rd with the distance of position transducer 4 and detects distance, now position transducer 4 output low level signal, so the mark that can rotate a circle in this, as frame or X ray bulb 1, so the response signal of position transducer 4 IP (index pulse) represents.Visible AP in Fig. 2
0,1, AP
90,1with Rot
npulse width inconsistent, this is different due to ferrule 5 and groove 6, so cause " induction " its position transducer different, and then causes the duration of response signal different.
In Fig. 1 when X ray bulb 1 turns clockwise from 0 ° of position, the response signal that position transducer 2 exports is AP
0, the response signal that position transducer 3 exports is AP
90, the response signal that position transducer 4 exports is IP.Because ferrule 5 is by certain time interval T, shifts to position transducer 2,3 one by one, therefore from coding metal head 5
1start, position transducer 2 can produce 24 high level signals successively, as AP in Fig. 2 a and Fig. 2 b
0shown in.And position transducer 3 is due to separated by a distance with position transducer 2, therefore only has coding metal head 5
1be rotated clockwise to and reach first with the distance of position transducer 3 when detecting distance, position transducer 3 just can produce first response signal AP
90,1, as high level signal " 1 ", produce 23 high level signals successively by certain time interval T afterwards, as AP in Fig. 2 a and Fig. 2 b
90shown in.Suppose that Δ w is the width of an AP pulse, the distance between position transducer 2 and 3 can be set to Δ w/2, then synchronous with IP pulse signal is AP
0, and the signal having Δ w/2 to offset is AP
90.AP is illustrate only in Fig. 2
0and AP
90a part.Rot in Fig. 2
nbe the IP signal rotated for n-th time, Rot
n+1be the IP signal of (n+1) secondary rotation, n is positive integer.
In addition, can also according to AP in each rotary course
0and AP
90the sequential relationship of middle output high level signal judges the sense of rotation of frame or X ray bulb: if AP
0early than AP
90first export high level signal, then X ray bulb is that clockwise direction rotates, otherwise, if AP
0export high level signal and be later than AP
90, then X ray bulb is counterclockwise rotate.
As described in the background section, closed-loop control comparatively accurately cannot be realized to the rotation of frame by the sample mode of AP information of 24 points in current low side CT equipment.
For overcoming this defect, the present invention proposes a kind of device detecting bulb angle position, and it realizes by rearranging existing position transducer and inductive means doubles existing AP sampled point the closed-loop control rotated frame further.
In detection one equipment of the present invention, the device of bulb angle position can be used for comprising in the equipment of rotary part and stationary parts, is not limited to the CT equipment of field of medical device.Inductive means can be aforesaid ferrule, groove or photovalve etc., and certain position transducer " will respond to " inductive means, thus position transducer also can with inductive means respective change.
Below for low side CT equipment, illustrate 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: be provided with the Part I side face of a plurality of inductive means and do not install the Part II side face of inductive means, wherein Part I side face is at least the half side face of rotary part; Primary importance sensor and second place sensor is separated by a distance is arranged on the stationary parts of frame, this distance is at least the distance between adjacent two inductive means.
Fig. 3 is the embodiment schematic diagram that the present invention detects X ray bulb AP device.The device detecting AP in figure comprises installation a plurality of ferrule 5 on the rotating gantry and is arranged on frame stationary parts for the primary importance sensor 2 of " induction " ferrule 5 and second place sensor 8, wherein be provided with the Part I side face 14 of a plurality of ferrule 5 and do not install the Part II side face 13 of ferrule 5 to arrange about the mode of frame rotation center symmetry, namely Part I side face 14 and Part II side face 13 are respectively 1/2 of rotary frame periphery.So compared with prior art, a plurality of ferrule 5 of the present invention is arranged in the semi-circumference of rotary frame 180 degree, instead of on the circle being arranged in rotary frame 360 degree shown in Fig. 1; Primary importance sensor 2 and second place sensor 8 are to arrange about the mode of frame rotation center symmetry simultaneously, instead of the position transducer 2 and 3 shown in Fig. 1 abutted to layout.So just can when not increasing existing ferrule number, double existing AP sampling rate, as brought up to often turn 48 sampled points from often turning 24 sampled points, thus realize closed-loop control that frame is rotated, and further increase the stability that image quality and frame rotate.
Preferably, a plurality of ferrule of Part I side face are equally spaced arranged on the half side face of rotary frame.This arrangement is relatively simple, and can obtain the AP signal of rule.
In addition, the device that the present invention detects AP also comprises 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 distance time, the 3rd position transducer can produce one the 3rd response signal, as low level signal.Here groove 6 abutted to coding metal head 5
1arrange, the 3rd position transducer 4 abutted to primary importance sensor 2 and arranges, makes in X ray bulb 0 ° of position, the 3rd response signal Rot
nwith the first response signal AP
0,1can produce simultaneously.
Fig. 3 a illustrates X ray bulb when being positioned at 0 ° of position, the arrangement of three position transducers 2,4,8 and a plurality of ferrule 5 and present position.Now coding metal head 5
1reach first with the distance of primary importance sensor 2 and detect distance, so primary importance sensor exports a high level signal, and second place sensor 8 detects distance owing to not having ferrule and its distance to reach first, so second place sensor output low level signal always.Wherein, described first detect distance and be less than 4mm.
Fig. 3 b illustrates X ray bulb when being positioned at 180 ° of positions, the position residing for a plurality of ferrule.When X ray bulb turns clockwise 180 ° from 0 ° of position, coding metal head 5
1just reach first with the distance of second place sensor 8 and detect distance, now second place sensor 8 produces response signal AP
180, as high level signal " 1 ", now detect distance, so primary importance sensor 2 starts output low level signal, until X ray bulb continues to be rotated clockwise to coding metal head 5 because the distance of ferrule and primary importance sensor 2 does not all reach first
1again reach first with the distance of primary importance sensor 2 and detect distance.
Fig. 4 is another embodiment schematic diagram of device that the present invention detects X ray bulb AP.What this another embodiment was different from Fig. 3 is that Part I side face and Part II side face are divided into a plural number side face respectively, and the sub-side face of Part I side face and the sub-side face of Part II are to arrange about the mode of frame rotation center symmetry.Object is that second place sensor 8 cannot " be responded to " to any one ferrule 5i when primary importance sensor 2 " induction " is to ferrule 5; And when second place sensor 8 " induction " ferrule 5, primary importance sensor 2 cannot " be responded to " to any one ferrule 5i, such primary importance sensor 2 and second place sensor 8 alternately " induction " ferrule 5, alternately to produce high level signal, thus double existing AP sampling rate.Visible, embodiment illustrated in fig. 4ly still when not increasing existing ferrule number, existing AP sampling rate can be doubled, as brought up to often turn 48 sampled points from often turning 24 sampled points.
Fig. 5 is another embodiment schematic diagram of device that the present invention detects X ray bulb AP.With Fig. 3 unlike, the number of ferrule 5 increases to some extent, the number but increased is less than existing ferrule number N (as N=24), the Part I side face 14 ' being provided with ferrule 5 so is just greater than the Part II side face 13 ' not installing ferrule, so Part I side face 14 ' and Part II side face 13 ' also just cannot be symmetrical about frame rotation center; And the position of second place sensor 8 also changes, it can be positioned on the stationary parts corresponding with Part II side face 13 '.In this embodiment, although add the number of existing ferrule, but existing AP sampling rate can be doubled when undouble ferrule number, also save cost.Only compare the embodiment cost shown in Fig. 3 and Fig. 4 slightly high.
Fig. 6 be frame clockwise or be rotated counterclockwise time, the AP signal schematic representation that position in the present invention residing for 24 ferrule 5 and three position transducers produce, wherein Fig. 6 a and Fig. 6 c illustrates frame when turning clockwise, the AP signal schematic representation that the position residing for a plurality of ferrule 5 and three position transducers produce separately; Fig. 6 b and Fig. 6 d illustrates frame when being rotated counterclockwise, the AP signal schematic representation that the position residing for a plurality of ferrule 5 and three position transducers produce separately.
As shown in Figure 6 a, when frame turns clockwise (as shown by arrows in FIG. direction), tagging ferrule 5
1start, ferrule 5 is by certain time interval T, shift to primary importance sensor 2 one by one, and therefore position transducer 2 produces 24 high level signals successively, AP as fig. 6 c
0, second place sensor 8 due to ferrule 5 away from then cannot " respond to " to ferrule 5 always, so its output signal AP
180it is low level signal as fig. 6 c always.Until frame turns clockwise after 180 °, because ferrule 5 is clockwise away from primary importance sensor 2, make the distance between ferrule 5 and primary importance sensor 2 be greater than first and detect distance, primary importance sensor 2 output low level signal is until present scan terminates since then, then because of the close clockwise of ferrule 5, " induction ", to ferrule 5, starts to export high level signal AP second place sensor 8
180, wherein AP
180, lastfor AP during last scan
180last high level response signal.And groove 6 and the 3rd position transducer 4 are as the origin identification of rotation sweep, in X ray bulb 0 ° of position, produce low level response signal Rot
n, IP as fig. 6 c.
Otherwise, as shown in Figure 6 b, when frame is rotated counterclockwise (as shown by arrows in FIG. direction), 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 successively, AP as shown in fig 6d
180, primary importance sensor 2 then due to ferrule 5 away from then cannot " respond to " to ferrule 5, so its output signal AP
0it is low level signal as shown in fig 6d always.Until after frame is rotated counterclockwise 180 °, because ferrule 5 is counterclockwise away from second place sensor 8, make the distance between ferrule 5 and second place sensor 8 be greater than first and detect distance, the straight present scan of second place sensor 2 output low level signal terminates since then, then because of the close counterclockwise of ferrule 5, " induction ", to ferrule 5, starts to export high level signal AP primary importance sensor 2
0.Because in the present invention, the origin identification of single rotation sweep is: AP
0the low level signal of high level signal and IP synchronously produce, so AP in Fig. 6 d
0, lastfor the signal exported at X ray bulb 0 ° of position primary importance sensor 2, now coding metal head 5
1reach first with the distance of primary importance sensor and detect distance, after this just counterclockwise away from primary importance sensor 2.AP
180,1for frame be rotated counterclockwise time, second place sensor 8 export first high level signal.
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.As from 0 ° of position of X ray bulb 1, according to AP
0and AP
180the sequential relationship of middle generation high level signal just can judge the sense of rotation of X ray bulb: if AP
0after continuous output high level signal, AP
180export high level signal again, then X ray bulb or frame are that clockwise direction rotates, as fig. 6 c; Otherwise, if AP
0only export high level signal, then an AP
180continuous output high level signal, then AP
0export high level signal continuously again, then X ray bulb or frame are counterclockwise rotate, as shown in fig 6d.
Further, the device that the present invention detects AP also comprises a kind of Signal averaging assembly, for by the first response signal AP
0with the second response signal AP
180superpose.AP sampled signal after such superposition becomes 48 from existing 24, so the blank Δ α of angle is 360 °/48=7.5 °, this angle blank compared to existing technology in 15 ° improve a lot, thus can realize the closed-loop control to frame rotation.
The present invention also provides the method for bulb angle position in a kind of detection one equipment, and it comprises:
First, described a plurality of inductive means is arranged on the Part I side face of described rotary part, wherein said Part I side face is at least the half side face of described rotary part;
Then, by described primary importance sensor with second place sensor is separated by a distance is arranged on described stationary parts, this distance is at least the distance between adjacent two inductive means.
Further, described method comprises:
One the 3rd inductive means and one the 3rd position transducer are provided, when the distance of described 3rd inductive means and described 3rd position transducer reach the 3rd detect distance time, described 3rd position transducer can produce one the 3rd response signal, and described 3rd inductive means and described 3rd position transducer are arranged so that, in bulb 0 ° of position, described 3rd response signal and described first response signal can produce simultaneously.
Further, described method comprises:
There is provided a sense of rotation decision means, it judges sense of rotation according to the sequential relationship of described first response signal received and described second response signal.
Further, described method comprises: provide a Signal averaging assembly, for described first response signal received and described second response signal being superposed.
According to one embodiment of present invention, described Part I side face and described Part II side face are arranged in the mode of the rotation center symmetry about described rotary part.
According to another embodiment of the invention, described inductive means is equally spaced arranged on described Part I side face.
According to still a further embodiment, described primary importance sensor and second place sensor are arranged in the mode of the rotation center symmetry about described rotary part.
The present invention relates to the device of bulb angle position in a kind of detection one equipment, described equipment comprises rotary part and stationary parts, described 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 distance time, primary importance sensor can produce one first response signal, when the distance of inductive means and second place sensor reach described first detect distance time, second place sensor can produce one second response signal, the side face of described rotary part is made up of two parts: be provided with the Part I side face of a plurality of described inductive means and do not install the Part II side face of described inductive means, wherein said Part I side face is at least the half side face of described rotary part, described primary importance sensor and second place sensor is separated by a distance is arranged on described stationary parts, 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.Thus existing AP sampling rate can be doubled when undouble existing inductive means number, and realize the closed-loop control to frame rotation.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (14)
1. detect a device for bulb angle position in an equipment, described equipment comprises rotary part and stationary parts (15), and described 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 described inductive means and described primary importance sensor (2) reach first detect distance time, described primary importance sensor (2) can produce one first response signal, when the distance of a described inductive means and described second place sensor (8) reach described first detect distance time, described second place sensor (8) can produce one second response signal, it is characterized in that
The side face of described rotary part is made up of two parts: be provided with the Part I side face (14) of described a plurality of inductive means and do not install the Part II side face (13) of described inductive means, wherein said Part I side face is at least the half side face of described rotary part;
Described primary importance sensor (2) and second place sensor (8) is separated by a distance is arranged on described stationary parts (15), this distance is at least the distance between adjacent two inductive means.
2. device according to claim 1, is characterized in that, described Part I side face (14) and described Part II side face (13) are arranged in the mode of the rotation center symmetry about described rotary part.
3. device according to claim 1, is characterized in that, described inductive means is equally spaced arranged on described Part I side face (14).
4. device according to claim 1, is characterized in that, described primary importance sensor (2) and second place sensor (8) are arranged in the mode of the rotation center symmetry about described rotary part.
5. device according to claim 1, it is characterized in that, described device comprises the 3rd inductive means (6) and the 3rd position transducer (4) further, when the distance of described 3rd inductive means (6) and described 3rd position transducer (4) reach the 3rd detect distance time, described 3rd position transducer (4) can produce one the 3rd response signal, and described 3rd inductive means (6) and described 3rd position transducer (4) make in bulb 0 ° of position through arranging, described 3rd response signal and described first response signal can produce simultaneously.
6. device according to claim 1, is characterized in that, described device comprises a sense of rotation decision means further, and it judges sense of rotation according to the sequential relationship of described first response signal received and described second response signal.
7. device according to claim 1, is characterized in that, described device comprises a Signal averaging assembly further, for described first response signal received and described second response signal being superposed.
8. detect a method for bulb angle position in an equipment, wherein said equipment comprises rotary part and stationary parts (15), and described method comprises:
A plurality of inductive means is arranged on the Part I side face (14) of described rotary part, wherein said Part I side face is at least the half side face of described rotary part;
By a primary importance sensor (2) with a second place sensor (8) is separated by a distance is arranged on described stationary parts (15), this distance is at least the distance between adjacent two inductive means;
When the distance of a described inductive means and described primary importance sensor (2) reach first detect distance time, described primary importance sensor (2) can produce one first response signal, when the distance of a described inductive means and described second place sensor (8) reach described first detect distance time, described second place sensor (8) can produce one second response signal.
9. method according to claim 8, it is characterized in that, the side face of described rotary part not to be installed the part of described inductive means for Part II side face (13), described Part I side face (14) and described Part II side face (13) are arranged in the mode of the rotation center symmetry about described rotary part.
10. method according to claim 8, is characterized in that, is equally spaced arranged in by described inductive means on described Part I side face (14).
11. methods according to claim 8, is characterized in that, described primary importance sensor (2) and second place sensor (8) are arranged in the mode of the rotation center symmetry about described rotary part.
12. methods according to claim 8, is characterized in that, described method comprises further:
One the 3rd inductive means (6) and one the 3rd position transducer (4) are provided, when the distance of described 3rd inductive means (6) and described 3rd position transducer (4) reach the 3rd detect distance time, described 3rd position transducer (4) can produce one the 3rd response signal, and described 3rd inductive means (6) and described 3rd position transducer (4) are arranged so that, in bulb 0 ° of position, described 3rd response signal and described first response signal can produce simultaneously.
13. methods according to claim 8, is characterized in that, described method comprises further:
There is provided a sense of rotation decision means, it judges sense of rotation according to the sequential relationship of described first response signal received and described second response signal.
14. methods according to claim 8, is characterized in that, described method comprises further:
There is provided a Signal averaging assembly, for described first response signal received and described second response signal being superposed.
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| CN104748773B (en) * | 2013-12-26 | 2017-07-25 | 同方威视技术股份有限公司 | Slip ring encoder and its coding method |
| CN110495897B (en) * | 2018-05-16 | 2023-09-05 | 通用电气公司 | Mobile control system and method for mobile equipment |
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