CN101873174B - High-speed laser data transmission system between rotating body and fixed body - Google Patents
High-speed laser data transmission system between rotating body and fixed body Download PDFInfo
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- CN101873174B CN101873174B CN2010102123991A CN201010212399A CN101873174B CN 101873174 B CN101873174 B CN 101873174B CN 2010102123991 A CN2010102123991 A CN 2010102123991A CN 201010212399 A CN201010212399 A CN 201010212399A CN 101873174 B CN101873174 B CN 101873174B
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Abstract
The invention relates to a high-speed laser data transmission system between a rotating body and a fixed body. Based on fiber optic transmission technology, the system is suitable for the slip ring system of an industrial CT, a high-end security detector or a medical CT to transmit detection data on the rotating body to the fixed body at a high speed with high reliability. The system comprises a data acquisition device, a rotary transmitting device, a rotating rod mechanism and a receiving sleeve which are arranged on the rotating body, and a fiber optic rotary joint and an optical combiner which are arranged on the fixed body. Because high-speed data transmission is realized by fiber optic communication, the system has high transmission rate, low error rate and high anti-jamming capability, and meets the requirements of large-data volume high-speed transmission in the industrial CT, the high-end security detector or the medical CT.
Description
Technical field
The present invention relates to a kind of rotary body based on optical fiber communication and the high speed data transmission system between the fixed body, relate in particular to the rotary body that is applicable in industrial CT system, safety check instrument and the Medical CT system and the high speed data transmission system between the fixed body.
Background technology
In the industrial technology field, there are a lot of application scenarios need to be with the data information transfer on the rotary body to fixed body, the typical application as in industrial CT system, safety check instrument and Medical CT system, when checked object is detected, be transferred on the fixed body with needing in real time the high speed information high reliability that will detect on the rotary body.Initial data transmission system is that the mode by brush and conducting ring realizes, but since rotary body when rotated the contact resistance value between brush and the conducting ring constantly changing, this variation can produce very large signal noise, therefore thereby reduced the reliability of transfer of data, can not be used for the transmitting high speed data signal.Particularly under hyperbaric environment, the high-voltage noise that the electrion between rotary body and the fixed body causes is larger.In addition, owing to the contact friction between carbon brush and the slip ring, also affected the useful life of data transmission system.
Along with the high-speed industrial CT system with many row's x-ray detectors and Medical CT system are used widely in reality detects, the detection data that system collected within the unit interval increase greatly, and the mode that adopts carbon brush to contact with slip ring realizes that transfer of data is more and more unreliable and desirable.Therefore, industry has proposed to replace above-mentioned carbon brush slip-ring mode with wireless capacity coupled mode, but wireless capacity coupled electromagnetic field is than the interference that is easier to be subject to external voltage, electric current and electromagnetic field, so the accuracy of high speed data transfer and transmission rate are restricted and affect.
In order to solve the above problems, industry has also proposed the signal transmission system based on optics, as being in the patent application of CN101006925A at publication number, a kind of data transmission system based on optical fiber is disclosed, wherein, on rotary body, along the circumferential direction fix several electric light conversion elements (such as laser diode) and condenser lens as signal emission part, the fiber bundle that one section finite length along the circumferential direction is set on fixed body receives the light signal of radiating portion emission and is sent to photo-electric conversion element, guarantee in real work to have at least the light beam of a branch of radiating portion emission can drop on the fiber bundle on the fixed body.Be in the patent application of CN 1989905A at publication number, a kind of data transmission system based on optical fiber is disclosed equally, different from CN101006925A is, on rotary body, only be provided with an electric light conversion element (such as laser diode) and condenser lens in this patent application as signal emission part, on fixed body, along the circumferential direction be covered with optical fiber and receive the light signal of emission and be sent to photo-electric conversion element.But above-mentioned these two kinds of systems have all adopted more laser or optical fiber, and cost is higher, and practicality is restricted.
Summary of the invention
The object of the present invention is to provide a kind of high speed high reliability data transmission system between rotary body and the fixed body of being used for based on optical fiber communication, be particularly useful in the slip ring system of industry CT, safety check instrument and Medical CT, to realize being transferred to highly reliably the detection data high-speed on the rotary body on the fixed body, this high speed high reliability data transmission system comprises: data acquisition unit, and it is arranged on the rotary body; Optical fiber splitter, it is arranged on the rotary body; Rotary launcher, it is arranged on the rotary body; Rotating rod mechanism, it is arranged on the fixed body; Fiber rotation connector, it is arranged on this fixed body; The optical fiber mixer, it is arranged on the fixed body.
Wherein data acquisition unit have that analog electrical signal with X-ray receiving system conversion is converted to digital electric signal and this digital electric signal is converted to digital optical signal and by optical fiber with its function that transfers out, this data acquisition unit links to each other with optical fiber splitter, and laser signal is sent in the rotary launcher along separate routes.
Rotary launcher mainly comprises rotation emission cover, rotation emission control part and fiber optic collimator mirror.Rotating rod mechanism mainly comprises the rotation control section, scalable part, and spring receives cover and fibre-coupled mirrors.Wherein the fiber optic collimator mirror can become the optical alignment in the optical fiber directional light to spatial emission, and fibre-coupled mirrors can be with the parallel light focusing in space in optical fiber.Fiber rotation connector can be transferred to the light in the optical fiber of each road rotation in each self-corresponding fixing optical fiber, thereby is transferred in the image processing apparatus of safety check instrument or CT system through the optical fiber mixer again.
Description of drawings
Fig. 1 is the principle schematic of data transmission system proposed by the invention;
Fig. 2 is the emission cover and the schematic diagram that cooperates that receives cover in the embodiments of the invention.
Embodiment
As shown in Figure 1, optical fiber data transmission system proposed by the invention comprises rotary body 110, data acquisition unit 140, fiber optic collimator mirror 150, rotary launcher 160, rotating rod mechanism 170, fibre-coupled mirrors 180, fixed body 210, fiber rotation connector 220 and optical combiner 230.Wherein, data acquisition unit 140 and rotary launcher 160 all are installed on the rotary body 110, and fiber optic collimator mirror 150 is installed in the emission cover 162 of rotary launcher 160, and X-ray emitter 120 and X-ray receiving system 130 also are installed on the rotary body 110; Rotating rod mechanism 170, fiber rotation connector 220 and optical fiber mixer 230 all are installed on the fixed body 210, and fibre-coupled mirrors 180 is installed in the reception cover 174 of rotating rod mechanism 170, and fixed body 210 outermost fine rules represent the framework of fixed body 210.
In the scanning process of CT system, rotary body 110 is rotated by driven by motor, motor is not shown in Fig. 1, X-ray emitter 120 continues the emission X-ray and rotates with rotary body 110, described X-ray passes checked object between this X-ray emitter 120 and X-ray receiving system 130 and received by X-ray receiving system 130, X-ray receiving system 130 can be analog electrical signal with the power conversion of the X-ray that receives, and this X-ray receiving system 130 can be the x-ray detector array of single row or multiple rows.
This X-ray receiving system 130 links to each other with data acquisition unit 140, and the analog electrical signal that detects is sent to this data acquisition unit 140, through converting digital electric signal to after analog-to-digital conversion and the corresponding data processing, in high speed CT system, data acquisition unit 140 generally also comprises electrooptic switching element 141, digital electric signal is converted to digital optical signal and by Optical Fiber Transmission to fiber optic collimator mirror 150.In the system of reality, data acquisition unit 140 is connected with all fiber optic collimator mirror 150 by optical fiber splitter.
Rotary launcher 160 is fixed on the circumference of rotary body 110 equally spacedly, selects 4 rotary launchers 160 in the present embodiment, and interval 90 degree are installed.Rotary launcher 160 mainly comprises emission rotation control section 161, emission cover 162 and fiber optic collimator mirror 150, wherein, fiber optic collimator mirror 150 is installed in the emission cover 162, the front end of emission cover 162 is cone-shaped, emission cover 162 is by 161 controls of emission rotation control section and rotate, and emission rotation control section 161 is comprised of control circuit and motor and actuator and extension spring.
As shown in Figure 1, when rotary body 110 is rotated counterclockwise, emission rotation control section 161 control emission covers 162 turn clockwise, and all the time facing to the pivot of rotating rod mechanism 170, receiving the scalable part 172 of rotation control section 171 control swingles turns clockwise, and it is relative with emission cover 162 all the time to guarantee to receive cover 174, in rotary course, emission cover 162 cooperates so that the scalable part 172 of swingle is shunk first again elongation, so that the position of fiber optic collimator mirror 150 and fibre-coupled mirrors 180 does not change in rotary course with reception cover 174.When rotary launcher 160A is rotated counterclockwise the position at 160D place, 160B also rotates to the position at 160A place, at this moment the scalable part 172A of swingle also rotates to the position at 172D place, and 172B rotates to the position at 172A place, and emission cover 162B begins to cooperate with reception cover 174B.When rotary body 110 was rotated counterclockwise again, when namely 160A was rotated counterclockwise from the position of 160D again, the extension spring in the emission rotation control section 161 hauled emission cover 162 Rotate 180 degree, get back to can with the state that receives cover and cooperate.
Like this in the rotary course of rotary body 110, receive cover and cooperate one by one with the emission cover and take over, there is all the time the cover of reception cooperating with the emission cover, thereby guarantees that fiber optic collimator mirror and fibre-coupled mirrors are vis-a-vis, smooth and easy thereby assurance is communicated by letter.Fibre-coupled mirrors converges to light signal and is transferred in the four-core fiber rotary connector 220 in the optical fiber again, fiber rotation connector 220 in fixed fiber, is transferred to the optical signal transmission in the spin fiber in the image processing apparatus through four unification optical fiber mixers 230 again.
In the present invention, the number of rotary launcher 160, fiber optic collimator mirror 150, fibre-coupled mirrors 180 and the scalable part 172 of swingle is preferably 4, but the scalable part 172 of rotary launcher 160, fiber optic collimator mirror 150, fibre-coupled mirrors 180 and swingle of any number can be set according to the actual needs, and set the distance in rotating rod mechanism and the rotary body center of circle according to this.
Claims (3)
1. one kind based on the rotary body of optical fiber communication and the high speed data transmission system between the fixed body, it is characterized in that this high speed data transmission system comprises:
Data acquisition unit, it is arranged on the rotary body;
Rotary launcher, it is arranged on the rotary body with being separated by 90 degree, and this rotary launcher mainly comprises emission rotation control section, emission cover and fiber optic collimator mirror, and the fiber optic collimator mirror is installed in the emission cover;
Rotating rod mechanism, it is arranged on the fixed body, mainly comprises receiving rotation control section, the scalable part of swingle, spring, reception cover and fibre-coupled mirrors, and fibre-coupled mirrors is installed in and receives in the cover;
Fiber rotation connector, it is arranged on the fixed body;
The optical fiber mixer, it is arranged on the fixed body;
When rotary body rotated, at a pair of emission cover with receive after cover cooperating 90-degree rotation, another was to the emission cover and receive cover and begin to match, and is cooperating 90-degree rotation.
2. high speed data transmission system as described in claim 1, data acquisition unit wherein is converted to analog electrical signal digital electric signal and this digital electric signal is converted to digital optical signal, and by optical fiber it is transferred out.
3. high speed data transmission system as described in claim 1, wherein the emission cover is the convex cone structure, receive cover and be the concave cone structure, and the convex cone of emission cover with receive the concave cone cone angle that overlaps and equate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102123991A CN101873174B (en) | 2010-06-29 | 2010-06-29 | High-speed laser data transmission system between rotating body and fixed body |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102123991A CN101873174B (en) | 2010-06-29 | 2010-06-29 | High-speed laser data transmission system between rotating body and fixed body |
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| Publication Number | Publication Date |
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| CN101873174A CN101873174A (en) | 2010-10-27 |
| CN101873174B true CN101873174B (en) | 2013-03-13 |
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| CN2010102123991A Active CN101873174B (en) | 2010-06-29 | 2010-06-29 | High-speed laser data transmission system between rotating body and fixed body |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106209236B (en) * | 2016-07-18 | 2018-06-19 | 中国科学院半导体研究所 | Generation transmission and acquisition supervisory control signals system in high-speed communication |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1989905A (en) * | 2005-12-30 | 2007-07-04 | 西门子（中国）有限公司 | CT slip-ring system based on optical fibre data-transmission |
| CN101716082A (en) * | 2009-12-17 | 2010-06-02 | 北京航星机器制造公司 | Optical data transmission system between rotator and stator |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6104849A (en) * | 1997-10-02 | 2000-08-15 | Litton Systems, Inc. | Fiber optic rotary joint |
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- 2010-06-29 CN CN2010102123991A patent/CN101873174B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1989905A (en) * | 2005-12-30 | 2007-07-04 | 西门子（中国）有限公司 | CT slip-ring system based on optical fibre data-transmission |
| CN101716082A (en) * | 2009-12-17 | 2010-06-02 | 北京航星机器制造公司 | Optical data transmission system between rotator and stator |
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| CN101873174A (en) | 2010-10-27 |
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Inventor after: Xu Yuanfei Inventor after: Yang Jiwen Inventor after: Wang Ji Inventor after: Liu Gang Inventor after: Huang Faheng Inventor before: Xu Yuanfei Inventor before: Yang Jiwen Inventor before: Wang Ji |
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