CN201629742U - High-speed data transmission device between rotating body and fixed body - Google Patents
High-speed data transmission device between rotating body and fixed body Download PDFInfo
- Publication number
- CN201629742U CN201629742U CN200920279401XU CN200920279401U CN201629742U CN 201629742 U CN201629742 U CN 201629742U CN 200920279401X U CN200920279401X U CN 200920279401XU CN 200920279401 U CN200920279401 U CN 200920279401U CN 201629742 U CN201629742 U CN 201629742U
- Authority
- CN
- China
- Prior art keywords
- rotary body
- fixed body
- laser
- speed data
- oval
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Apparatus For Radiation Diagnosis (AREA)
- Optical Communication System (AREA)
Abstract
A high-speed data transmission device between a rotating body and a fixed body is based on the wireless laser communication technology and is applicable to the industrial CT or the medical CT system so as to realize the high-speed and high-reliable transmission of the detection data on the rotating body to the fixed body. The device comprises a data acquisition unit arranged on the rotating body, a plurality of laser transmitting units arranged on the circumference of the rotating body, a reflector arranged on the fixed body and a plurality of laser receiving units arranged on the fixed body. Due to the adoption of the wireless laser communication, the device has the advantages of high-speed data transmission, high transmission rate, low bit error rate and strong anti-interference capability, thereby meeting the requirement on the high-speed transmission of a large quantity of data in the industrial CT or medical CT system.
Description
Technical field
The utility model relates to a kind of high speed data transfer device that is applicable between rotary body and the fixed body, relates in particular to the rotary body that is applicable in industrial CT system and the Medical CT system and the high speed data transfer device between the fixed body.
Background technology
In the industrial technology field, there are a lot of application scenarios need be to fixed body with the data information transfer on the rotary body, typical application is as in industrial CT system and Medical CT system, when checked object is detected, need in real time detected high speed information on the rotary body to be transferred on the fixed body highly reliably.Initial data transmission device 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 big signal noise, therefore thereby reduced reliability of data transmission, 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 bigger.In addition, owing to the contact friction between carbon brush and the slip ring, also influenced the useful life of data transmission device.
Along with high-speed industrial CT system and Medical CT system with many row's x-ray detectors are used widely in actual detected, the detection data that system collected in 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 subjected to external voltage, electric current and electromagnetic field, so the accuracy of high speed data transfer and transmission rate are restricted and influence.
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 (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 a branch of radiating portion emitted light beams can drop on the fiber bundle on the fixed body.At publication number is in the patent application of CN 1989905A, a kind of data transmission system based on optical fiber is disclosed equally, different with CN101006925A is, on rotary body, only be provided with an electric light conversion element (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 purpose of this utility model is to provide a kind of high speed high reliability data transmitting device between rotary body and the fixed body of being used for based on wireless laser communication, be particularly useful in industry CT or the Medical CT system, with realization the detection data high-speed on the rotary body is transferred on the fixed body highly reliably, this high speed high reliability data transmitting device comprises: be arranged on the data acquisition unit on the rotary body; Be arranged on along several laser beam emitting devices on the rotary body circumferencial direction; Be arranged on several speculums on the fixed body; Be arranged on the laser receiver on the fixed body.
Wherein data acquisition unit links to each other with laser beam emitting device, have that analog electrical signal with X-ray receiving system conversion is converted to digital electric signal and digital electric signal is converted to digital optical signal and by optical fiber with its function that transfers out.
Laser beam emitting device is made up of photoelectric conversion unit, electrooptic switching element and condenser lens, and wherein photoelectric conversion unit is a photodiode, is used for the digital optical signal of optical fiber is converted to digital electric signal; Electrooptic switching element is a semiconductor laser diode, be used for digital electric signal being converted to digital optical signal and transferring out at atmosphere, and this electrooptic switching element emitted light beams along rotary body radially, the promptly reverse center of circle through rotary body, condenser lens collimation and contraction light beam, the number of laser beam emitting device is decided by the size and the number of speculum.
Speculum can be elliptical mirror or ellipsoidal mirror, the reflecting surface of elliptical mirror is that oval a part of circumference between the framework of rotary body internal diameter and fixed body is along extending the oval calotte that certain width forms perpendicular to oval direction, this width is advisable can reflect whole light beams fully, two focuses of this ellipse are respectively the centers of the center of circle of this rotary body and the photoelectric detector detection faces in the laser receiver, select the angle maximum of suitable major semiaxis of this ellipse and semi-minor axis so that a part of circumference between the framework of rotary body internal diameter and fixed body that should ellipse and the formation of the rotary body center of circle.The reflecting surface of the ellipsoidal mirror ellipsoid that to be oval a part of circumference between the framework of rotary body internal diameter and fixed body rotate to an angle and form with respect to the straight line at elliptic focus place, this angle is advisable can reflect whole light beams fully, two focuses of this ellipse are respectively the centers of the center of circle of this rotary body and the photoelectric detector detection faces in the laser receiver, select the angle maximum of suitable major semiaxis of this ellipse and semi-minor axis so that a part of circumference between the framework of rotary body internal diameter and fixed body that should ellipse and the formation of the rotary body center of circle.
Laser receiver mainly is made up of photoelectric detector and condenser lens, and this photoelectric detector is a photodiode, and this condenser lens converges to light beam on the detection faces of this photoelectric detector.
Description of drawings
Fig. 1 is the apparatus structure schematic diagram of an embodiment of the wireless laser data transmission device that proposes of the utility model;
Fig. 2 is based on the apparatus structure schematic diagram of another embodiment of the wireless laser data transmission device that the utility model proposes;
Fig. 3 is based on the apparatus structure schematic diagram that wireless laser data transmission device that the utility model proposes adopts another embodiment of polylith speculum.
Embodiment
As shown in Figure 1, the wireless laser data transmission device that the utility model proposed comprises rotary body 110, data acquisition unit 140, laser beam emitting device 150, angular encoder 160, Laser emission commutation circuit 170, fixed body 210, laser receiver 220 and speculum 310.Wherein, data acquisition unit 140, laser beam emitting device 150, angular encoder 160 and Laser emission commutation circuit 170 all are installed on the rotary body 110, X-ray emitter 120 and X-ray receiving system 130 also are installed on the rotary body 110, the thick line circumference of rotary body 110 is the rotary body internal diameter, and the fine rule circumference of rotary body 110 is the external diameter of rotary body; Laser receiver 220 and speculum 310 are installed on the fixed body 210, and fixed body 210 outermost fine rules are represented 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 an 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 detected analog electrical signal 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, and digital electric signal is converted to digital optical signal and gives laser beam emitting device 150 by Optical Fiber Transmission.In the device of reality, data acquisition unit 140 is connected with all laser beam emitting device 150, but for brevity, only shows data acquisition unit 140 among Fig. 1 and give a laser beam emitting device 150 with digital optical signal by Optical Fiber Transmission.
Laser beam emitting device 150 is made up of photoelectric conversion unit 151 and electrooptic switching element 152, photoelectric conversion unit 151 mainly is made up of photodiode, electrooptic switching element 152 mainly is made up of semiconductor laser diode, the transmit direction of this semiconductor laser diode along rotary body 110 radially, wherein photoelectric conversion unit 151 can be converted to the digital optical signal that data acquisition unit 140 transmits the corresponding signal of telecommunication, electrooptic switching element 152 is modulated into multi-form light signal according to corresponding modulation system with this signal of telecommunication, is launched by semiconductor laser diode.
By the semiconductor laser diode emission laser beam after shining on the speculum 310, will produce reflection, the reflecting surface that designs this speculum 310 is an oval calotte, reflecting surface is that oval a part of oval circumference between the framework of rotary body internal diameter and fixed body is along extending the oval calotte that certain width forms perpendicular to oval direction, this width is advisable can reflect whole light beams fully, two focuses of this ellipse are respectively the some B at place, detector detection faces center in the center of circle A point of rotary body and the laser receiver 220, optical property according to ellipse, light by oval focus emission will converge at another focus through behind the elliptical reflecting arbitrarily, like this to guarantee in rotary body 110 rotary courses, semiconductor laser diode emitted light beams in the laser beam emitting device 150 all converges on the detector detection faces of laser receiver 220 through after the reflection of speculum 310, and this detector is a photodiode.With speculum 310 be arranged to the rotary body outer radius portion not in one plane, thereby can not produce the interference of locus.Because the semiconductor laser diode emitted laser is a space divergence, in order to collimate and to shrink the semiconductor laser diode emission laser beam, in the semiconductor laser diode front condenser lens is installed, the laser emission point that semiconductor laser diode is set is positioned on the focus of condenser lens.Equally in order to converge the laser beam by mirror reflects, a condenser lens is installed before detector, the light beam scope after it is focused on is less than the detection faces size of detector, thus receiving beam effectively.
Speculum 310 must be between rotary body internal diameter and fixed body external frame, select the angle maximum of suitable major semiaxis of this ellipse and semi-minor axis so that a part of circumference between the framework of rotary body internal diameter and fixed body that should ellipse and the formation of the rotary body center of circle, thereby determine the number of laser beam emitting device 150, must guarantee that the transmission of data is continual, all must there be laser beam irradiation any time in promptly working to speculum 310 and be reflected on the laser receiver 220.For example in an embodiment of the present utility model, by the maximum angle that calculates the formation of the oval a part of circumference between the framework of rotary body internal diameter and fixed body and the rotary body center of circle is 48.8 degree, therefore the number of determining laser beam emitting device 150 is 8, and angle is 45 degree at interval.When rotary body 110 is positioned at position shown in Figure 1, can judge the usable reflection zone that laser beam emitting device 150B will enter speculum 310 by angular encoder 160, laser beam emitting device 150A will leave the usable reflection zone of speculum 310, thereby allow semiconductor laser diode work among the laser beam emitting device 150B by Laser emission commutation circuit 170, and the semiconductor laser diode among the laser beam emitting device 150A is closed.Light path when dotted line is depicted as laser beam emitting device 150 and rotates to this position along with rotary body 110 among Fig. 1.In the device of reality, Laser emission commutation circuit 170 is connected with all laser beam emitting device 150, but for brevity, only shows Laser emission commutation circuit 170 among Fig. 1 and be connected with a laser beam emitting device 150.
Fig. 2 is based on the apparatus structure schematic diagram of another embodiment of the wireless laser data transmission device that the utility model proposes, different with Fig. 1 is that speculum 310 is an elliposoidal, the reflecting surface ellipsoid that to be oval a part of circumference between the framework of rotary body internal diameter and fixed body rotate to an angle and form with respect to the straight line at elliptic focus place, this angle is advisable can reflect whole light beams fully, two focuses of this ellipse are respectively the centers of the center of circle of this rotary body and the photoelectric detector detection faces in the laser receiver, select the angle maximum of suitable major semiaxis of this ellipse and semi-minor axis so that a part of circumference between the framework of rotary body internal diameter and fixed body that should ellipse and the formation of the rotary body center of circle.Even the semiconductor laser diode emitted laser is a space divergence like this, but such ellipsoid reflecting curved surface will be well with the beam reflection of dispersing on the detection faces of detector.
Fig. 3 is based on the apparatus structure schematic diagram that wireless laser data transmission device that the utility model proposes adopts another embodiment of polylith speculum, adopted two same speculums 310 with on beam reflection to two detector in this embodiment, the same among the control principle of 170 pairs of laser beam emitting devices 150 of Laser emission commutation circuit and Fig. 1, guarantee that promptly all there is a laser beam irradiation in any moment to speculum 310, and the mirror 310 that is reflected reflexes on the laser receiver 220, so just can only just can realize function same among Fig. 1, thereby reduce the cost of device with 4 laser beam emitting devices 150 and two laser receivers 220.
Claims (3)
1. the high speed data transfer device based on wireless laser communication is characterized in that, this high speed data transfer device comprises:
Be arranged on the data acquisition unit on the rotary body;
Be arranged on a plurality of laser beam emitting devices on the rotary body circumference, it is made up of photoelectric conversion unit, electrooptic switching element and condenser lens, and this electrooptic switching element is a semiconductor laser diode;
Be arranged on the speculum on the fixed body;
Be arranged on the laser receiver on the fixed body, it is made up of photoelectric detector and condenser lens, and this photoelectric detector is a photodiode.
2. the high speed data transfer device described in claim 1, speculum wherein is an elliptical mirror, its reflecting surface is that oval a part of circumference between the framework of rotary body internal diameter and fixed body is along extending the oval calotte that certain width forms perpendicular to oval direction, this width makes elliptical mirror can reflect whole light beams fully, and two focuses of this ellipse are respectively the centers of the center of circle of this rotary body and the photoelectric detector detection faces in the laser receiver.
3. the high speed data transfer device described in claim 1, speculum wherein is an ellipsoidal mirror, its reflecting surface ellipsoid that to be oval a part of circumference between the framework of rotary body internal diameter and fixed body rotate to an angle and form with respect to the straight line at elliptic focus place, this angle makes ellipsoidal mirror can reflect whole light beams fully, and two focuses of this ellipse are respectively the centers of the center of circle of this rotary body and the photoelectric detector detection faces in the laser receiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920279401XU CN201629742U (en) | 2009-11-16 | 2009-11-16 | High-speed data transmission device between rotating body and fixed body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920279401XU CN201629742U (en) | 2009-11-16 | 2009-11-16 | High-speed data transmission device between rotating body and fixed body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201629742U true CN201629742U (en) | 2010-11-10 |
Family
ID=43061141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920279401XU Expired - Lifetime CN201629742U (en) | 2009-11-16 | 2009-11-16 | High-speed data transmission device between rotating body and fixed body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201629742U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102723984A (en) * | 2012-05-17 | 2012-10-10 | 中国科学院高能物理研究所 | Data transmission device based on plane reflection in computer tomoscan imaging equipment |
| CN102723993A (en) * | 2012-05-25 | 2012-10-10 | 中国科学院高能物理研究所 | Data transmission device based on rotating ellipsoid reflection in computer tomography imaging equipment |
| CN102889454A (en) * | 2012-09-29 | 2013-01-23 | 北京航星机器制造公司 | Stander of high-speed data transmission system between rotary body and fixed body |
-
2009
- 2009-11-16 CN CN200920279401XU patent/CN201629742U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102723984A (en) * | 2012-05-17 | 2012-10-10 | 中国科学院高能物理研究所 | Data transmission device based on plane reflection in computer tomoscan imaging equipment |
| CN102723984B (en) * | 2012-05-17 | 2016-07-06 | 中国科学院高能物理研究所 | Based on the data transmission device of plane reflection in a kind of computer tomography device |
| CN102723993A (en) * | 2012-05-25 | 2012-10-10 | 中国科学院高能物理研究所 | Data transmission device based on rotating ellipsoid reflection in computer tomography imaging equipment |
| CN102889454A (en) * | 2012-09-29 | 2013-01-23 | 北京航星机器制造公司 | Stander of high-speed data transmission system between rotary body and fixed body |
| CN102889454B (en) * | 2012-09-29 | 2014-10-22 | 北京航星机器制造公司 | Stander of high-speed data transmission system between rotary body and fixed body |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101716082B (en) | Optical data transmission system between rotator and stator | |
| US9207406B2 (en) | Fiber optic rotary joints, methods practiced thereby, and fiber optic devices | |
| CN101888271B (en) | Optical data transmission system between rotating body and fixed body | |
| JP4495794B2 (en) | Signal transmission device and X-ray CT scanner | |
| CN100448402C (en) | CT slip-ring system based on optical fibre data-transmission | |
| JP3643384B2 (en) | X-ray tomography equipment | |
| JP3478566B2 (en) | X-ray CT scanner | |
| CN112491470B (en) | Alignment tracking wireless optical communication device and method using communication optical peripheral part | |
| JP2017006635A (en) | X-ray ct apparatus and data transfer apparatus | |
| CN201629742U (en) | High-speed data transmission device between rotating body and fixed body | |
| JP5496394B2 (en) | High-speed non-contact measurement data communication system | |
| CN100486525C (en) | CT slip-ring system based on optical fibre data transmission | |
| CN101873173B (en) | High-speed optical data transmission system between rotating body and fixed body | |
| US7027737B2 (en) | Method and apparatus for transmitting data from a rotary part to a stationary part of a data generating system | |
| CN102723984B (en) | Based on the data transmission device of plane reflection in a kind of computer tomography device | |
| CN101884547B (en) | High-speed optical data transmission system for slip ring | |
| CN101794504A (en) | Optical fiber data transmission system between rotating body and fixed body | |
| CN102739303B (en) | Based on the data transmission device of the paraboloid of revolution in a kind of computer tomography device | |
| CN104393918B (en) | Optical Data Transmission System between rotary body and fixed body | |
| CN210894701U (en) | Laser radar | |
| CN102723993A (en) | Data transmission device based on rotating ellipsoid reflection in computer tomography imaging equipment | |
| CN101884548B (en) | Optical data transmission system adopting slip ring | |
| CN210038158U (en) | Laser radar | |
| CN108833009A (en) | Multiple aperture space optical communication receiver and multiple aperture space optical communication system | |
| CN101873174B (en) | High-speed laser data transmission system between rotating body and fixed body |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Xu Yuanfei Inventor after: Zhang Lv Inventor after: Liu Gang Inventor after: Yang Jiwen Inventor after: Wang Ji Inventor after: Cui Hang Inventor after: Huang Faheng Inventor after: Xu Tao Inventor after: Jiang Zheng Inventor after: Yan Han Inventor before: Xu Yuanfei Inventor before: Yang Jiwen Inventor before: Wang Ji Inventor before: Cui Hang Inventor before: Huang Faheng Inventor before: Xu Tao Inventor before: Jiang Zheng Inventor before: Yan Han Inventor before: Zhang Lv |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: XU YUANFEI YANG JIWEN WANG JI CUI HANG HUANG FAHENG XU TAO JIANG ZHENG YAN HAN ZHANG LV TO: XU YUANFEI LIU GANG YANG JIWEN WANG JI CUI HANG HUANG FAHENG XU TAO JIANG ZHENG YAN HAN ZHANG LV |
|
| CX01 | Expiry of patent term |
Granted publication date: 20101110 |
|
| CX01 | Expiry of patent term |