CN101888270B - Optic fiber data transmission system for slip ring - Google Patents
Optic fiber data transmission system for slip ring Download PDFInfo
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- CN101888270B CN101888270B CN2010102123807A CN201010212380A CN101888270B CN 101888270 B CN101888270 B CN 101888270B CN 2010102123807 A CN2010102123807 A CN 2010102123807A CN 201010212380 A CN201010212380 A CN 201010212380A CN 101888270 B CN101888270 B CN 101888270B
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Abstract
The invention discloses a high-speed optic fiber data transmission system between a rotating body and a fixing body. The system is suitable for slip ring systems of industrial computed tomography (CT), high-end security monitors or medicinal CT based on optic fiber communication technology to transmit detection data on the rotating body to the fixing body reliably at a high speed. The system comprises a data acquisition device, an optical fiber collimating lens, a belt wheel, a synchronous belt and an optical fiber coupling mirror which are arranged on the rotating body, and an optical fiber rotating connector and an optical combiner which are arranged on the fixing body. By using optical fiber communication for the high-speed data transmission, the system has a high transmission speed, a low error rate and a high anti-interference capability and meets the requirement of high-speed mass data transmission in the industrial CT, the high-end security monitors or the medicinal 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, fix in the circumferential direction of the circle several electric light conversion elements (such as laser diode) and condenser lens as signal emission part, the fiber bundle that one section finite length is set on fixed body in the circumferential direction of the circle 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, be covered with in the circumferential direction of the circle 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: flexible drive mechanism, the first of this flexible drive mechanism is arranged on the rotary body, second is identical with third part, meshes with first respectively; Data acquisition unit, it is arranged on the rotary body; Several fiber optic collimator mirrors, it is arranged on the rotary body; Several fibre-coupled mirrors, it is arranged on this another part of flexible drive mechanism; Fiber rotation connector, it is arranged on this fixed body.
Wherein data acquisition unit links to each other with the fiber optic collimator mirror, 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.
The fiber optic collimator mirror can become the optical alignment in the optical fiber directional light to spatial emission, 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 rotation in the fixing optical fiber, thereby is transferred in the image processing apparatus of safety check instrument or CT system again.
Description of drawings
Fig. 1 is the principle schematic of data transmission system proposed by the invention.
Embodiment
Although the flexible drive mechanism in the execution mode hereinafter described is take belt wheel and Timing Belt as example, is not limited to this, those skilled in the art can adopt any flexible drive mechanism to realize the present invention.Equally, adopt two groups of Timing Belts in the execution mode hereinafter described, and the length of Timing Belt is three times of rotary body 1/4th girths, but be not limited to this, those skilled in the art can adopt any Timing Belt that can realize of the present invention group of number and anyly can realize that Timing Belt length of the present invention realizes the present invention.
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, belt wheel 160, Timing Belt 170, fibre-coupled mirrors 180, fixed body 210, fiber rotation connector 220 and optical combiner 230,240.Wherein, data acquisition unit 140, fiber optic collimator mirror 150, belt wheel 160 all are installed on the rotary body 110, and X-ray emitter 120 and X-ray receiving system 130 also are installed on the rotary body 110; Timing Belt 170, fiber rotation connector 220 and optical combiner 230,240 all are installed on the fixed body 210, and fibre-coupled mirrors 180 is installed on the Timing Belt 170, and fixed body 210 outermost fine rules represent the framework of fixed body 210.Only schematically show belt wheel 160 and Timing Belt 170 parts engagement situation among Fig. 1.
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.
The fiber optic collimator mirror is fixed on the circumference of rotary body 110, along the radial emission laser signal of rotary body 110, selects 2 fiber optic collimator mirror 150A and 150B in the present embodiment, and interval 90 degree are installed.Belt wheel 160 is fixed on the external diameter of rotary body 110, Timing Belt 170A, 170B interval 90 degree are installed, and be meshed with belt wheel 160 respectively, fibre-coupled mirrors 180 is fixed on the Timing Belt, the length of Timing Belt 170 is three times of belt wheel 1/160th 4 girth, guarantee that Timing Belt 170 and belt wheel 160 mesh 1/4th girths of belt wheel 160 fully, at 3 fibre-coupled mirrors 180A of Timing Belt 170A equal intervals fixed installation, 180B and 180C, at 3 fibre-coupled mirrors 180D of Timing Belt 170B equal intervals fixed installation, 180E and 180F, wherein fibre-coupled mirrors 180A is relative with fiber optic collimator mirror 150A and 150B respectively with 180B.When rotary body 110 rotation, thereby be fixed on also thereupon rotation drive Timing Belt 170 rotations of belt wheel 160 on the rotary body 110, be rotated clockwise to the process of position at fiber optic collimator mirror 150B place from position shown in Figure 1 as fiber optic collimator mirror 150A like this, fibre-coupled mirrors 180A also is rotated counterclockwise from position shown in Figure 1 to the position at fibre-coupled mirrors 180B place, and in rotary course, remain that fiber optic collimator mirror 150A is relative with fibre-coupled mirrors 180A, thereby the laser signal that guarantees fiber optic collimator mirror 150A emission can be got access to by fibre-coupled mirrors 180A fully.
When fiber optic collimator mirror 150A dextrorotation turn 90 degrees, fiber optic collimator mirror 150B also dextrorotation turn 90 degrees, Timing Belt 170A and 170B be counterclockwise 90-degree rotation under the drive of belt wheel 160, thereby guarantee that fibre-coupled mirrors 180F is corresponding with fiber optic collimator mirror 150B, simultaneously, belt wheel 160 also drives fiber rotation connector 220A and 220B is rotated counterclockwise, thereby guarantees that fiber rotation connector 220 is constant with the relative position of fibre-coupled mirrors.In the rotary course of belt wheel 160, have all the time a fibre-coupled mirrors 180 relative with fiber optic collimator mirror 150, and transmission of data signals.
Fiber optic collimator mirror 150 can become the optical alignment in the optical fiber directional light to spatial emission, fibre-coupled mirrors 180 can be with the parallel light focusing in space in optical fiber, fiber rotation connector 220 can be transferred to the light in the optical fiber of rotation in the fixing optical fiber, what adopt in the present invention is the triple channel fiber rotation connector, three fixed fiber passages of fiber rotation connector are connected on the three-in-one optical combiner, synthetic one road optical fiber output, through synthetic one tunnel optical-fibre channel of a two-in-one optical combiner, output in the image processing apparatus again.
In the present invention, the number of fiber optic collimator mirror 150 is preferably 2, the number of Timing Belt is preferably 2, and the number of fibre-coupled mirrors 180 is preferably 6, but fiber optic collimator mirror 150, fibre-coupled mirrors 180 and the Timing Belt of any number and number can be set according to the actual needs.
Claims (6)
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:
Flexible drive mechanism, this flexible drive mechanism is comprised of three parts, and first is arranged on the rotary body, and second portion and third part are same devices, cooperate with this first respectively;
Data acquisition unit, it is arranged on the rotary body;
Two fiber optic collimator mirrors, it is arranged in the first of flexible drive mechanism;
Six fibre-coupled mirrors, it is arranged on second and the third part of flexible drive mechanism;
Two fiber rotation connectors, it is arranged on this fixed body;
The optical fiber mixer, it is arranged on this fixed body;
Wherein when rotary body rotates, there is all the time a fibre-coupled mirrors relative with a fiber optic collimator mirror, and 90-degree rotation together.
2. high speed data transmission system as described in claim 1, data acquisition unit analog electrical signal wherein is converted to digital electric signal and this digital electric signal is converted to digital optical signal, by optical fiber it is transferred out.
3. high speed data transmission system as described in claim 1, two fiber optic collimator mirrors wherein are arranged on this rotary body with being separated by 90 degree, and the radial emission laser signal along this rotary body, three fibre-coupled mirrors wherein are arranged on the second portion of flexible drive mechanism equally spacedly, other three fibre-coupled mirrors are arranged on the third part of flexible drive mechanism equally spacedly, the length of second and third part of this flexible drive mechanism be this flexible drive mechanism first's length 3/4ths.
4. high speed data transmission system as described in claim 1, fiber rotation connector wherein lays respectively at the centre of second and shape that third part surrounds of flexible drive mechanism.
5. high speed data transmission system as described in claim 1 wherein when rotary body rotates, has a fibre-coupled mirrors relative with a fiber optic collimator mirror all the time, and 90-degree rotation together.
6. high speed data transmission system as described in claim 1, wherein when rotary body rotates, in a pair of fiber optic collimator mirror and fibre-coupled mirrors together vis-a-vis after the 90-degree rotation, it is relative that another fiber optic collimator mirror and another fibre-coupled mirrors begin, and synchronous rotary 90 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102123807A CN101888270B (en) | 2010-06-29 | 2010-06-29 | Optic fiber data transmission system for slip ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102123807A CN101888270B (en) | 2010-06-29 | 2010-06-29 | Optic fiber data transmission system for slip ring |
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| Publication Number | Publication Date |
|---|---|
| CN101888270A CN101888270A (en) | 2010-11-17 |
| CN101888270B true CN101888270B (en) | 2013-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010102123807A Active CN101888270B (en) | 2010-06-29 | 2010-06-29 | Optic fiber data transmission system for slip ring |
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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
- 2010-06-29 CN CN2010102123807A patent/CN101888270B/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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| CN101888270A (en) | 2010-11-17 |
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Inventor after: Xu Yuanfei Inventor after: Wang Ji Inventor after: Yang Jiwen Inventor after: Liu Gang Inventor after: Huang Faheng Inventor before: Xu Yuanfei Inventor before: Wang Ji Inventor before: Yang Jiwen |
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