CN115493528B - Slip ring positioning system and method of CT frame and computer readable storage medium - Google Patents
Slip ring positioning system and method of CT frame and computer readable storage medium Download PDFInfo
- Publication number
- CN115493528B CN115493528B CN202211189782.9A CN202211189782A CN115493528B CN 115493528 B CN115493528 B CN 115493528B CN 202211189782 A CN202211189782 A CN 202211189782A CN 115493528 B CN115493528 B CN 115493528B
- Authority
- CN
- China
- Prior art keywords
- light source
- slip ring
- angle
- light sources
- counting
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000004590 computer program Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 3
- 238000002591 computed tomography Methods 0.000 abstract description 20
- 238000009434 installation Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000011900 installation process Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/02—Details for dynamo electric machines
- H01R39/08—Slip-rings
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention provides a slip ring positioning system, a slip ring positioning method and a computer readable storage medium of a CT (computed tomography) rack, wherein the system comprises a slip ring, the outer ring surface of the slip ring is provided with first parallel bands, a plurality of first light sources and second light sources are alternately arranged on the first bands, and the wavelengths of the first light sources and the second light sources are different; the device also comprises an encoder, wherein the encoder corresponds to the outer ring surface and comprises a photoelectric sensor and a counting module; when the slip ring rotates, the first light source and the second light source on the outer ring surface are alternately captured by the photoelectric sensor, the counting module counts the number of the captured first light source and second light source, and the current position of the slip ring is obtained according to the counting and the angle between the two adjacent light sources.
Description
Technical Field
The present invention relates to the technical field of CT apparatuses, and in particular, to a slip ring positioning system and method for a CT gantry, and a computer readable storage medium.
Background
At present, a CT slip ring used for mass production basically uses a mechanical hole position type coding belt and a matched coder for positioning a rotating position. The existing mechanical hole position coding band is provided with 1024A/B hole positions and 1 HOME hole position for determining the position of the frame rotor when the slip ring rotates. However, the mechanical hole position type coding belt has the following problems in the use process:
1. the mechanical coding belt is easy to collide and damage in the slip ring installation process;
2. The replacement is not easy after the damage;
3. in the use process, the coding holes are easy to block, so that the rotary positions are reported to be wrong, and the image scanning is influenced;
4. the mechanical coding belt has high processing cost;
Disclosure of Invention
In order to overcome the technical defects, the invention aims to provide a slip ring positioning system, a slip ring positioning method and a computer readable storage medium of a CT frame, wherein the slip ring positioning system is low in installation risk, low in cost and high in reliability.
The invention discloses a slip ring positioning system of a CT (computed tomography) rack, which comprises a slip ring, wherein the outer ring surface of the slip ring is provided with first parallel belt rings, a plurality of first light sources and second light sources are alternately arranged on the first belt rings, and the wavelengths of the first light sources and the second light sources are different; the device also comprises an encoder, wherein the encoder corresponds to the outer ring surface and comprises a photoelectric sensor and a counting module; when the slip ring rotates, the first light source and the second light source on the outer ring surface are alternately captured by the photoelectric sensor, the counting module counts the number of the captured first light source and second light source, and the current position of the slip ring is obtained according to the counting and the angle between the two adjacent light sources.
Preferably, a second belt ring is further arranged on the outer ring surface, the second belt ring is parallel to the first belt ring, and a third light source is arranged on the second belt ring; when the photoelectric sensor captures the third light source, the current position is defined as an initial position, and the counting of the counting module is emptied when the current position is the initial position.
Preferably, the position on the first strap corresponding to the third light source is empty, so that the first light source or the second light source is not captured on the first strap when the photosensor captures the third light source on the second strap.
Preferably, the photoelectric sensor comprises a first photoelectric sensor and a second photoelectric sensor, and the first photoelectric sensor is used for capturing the first light source and the second light source; the second photosensor is for capturing the third light source.
Preferably, the device further comprises an angle measurement module, wherein the angle measurement module is used for measuring the angle between the slip ring and the CT bulb.
Preferably, a third band ring is further arranged on the outer ring surface, and a radio frequency antenna is arranged on the third band ring; the system also comprises a radio frequency module, wherein the radio frequency module and the encoder are arranged at the same axial position in the axial direction and correspond to the position of the radio frequency antenna in the radial direction.
Preferably, the first light source emits 770-622 nm wavelength red light, the second light source emits 622-597 nm wavelength orange light, and the third light source emits 597-577 nm wavelength yellow light.
The invention also discloses a slip ring positioning method of the CT frame, which is based on the slip ring positioning system, and comprises the following steps: when the slip ring rotates, the photoelectric sensor alternately captures the first light source and the second light source on the outer ring surface, and the counting module counts the number of the captured first light source and second light source, and obtains the current position of the slip ring according to the counting and the angle between the two adjacent light sources.
Preferably, when the photoelectric sensor captures the third light source, defining the current position as an initial position, and emptying the count of the counting module at the initial position, wherein the angle measuring module is used for measuring the angle alpha between the slip ring and the CT bulb; when the slip ring rotates, the photoelectric sensor alternately captures the first light source and the second light source on the outer ring surface, the counting module counts the number of the captured first light source and second light source, the angle of the slip ring relative to the initial position is obtained according to the counting and the angle between the two adjacent light sources, and the angle alpha is combined to obtain the angle of the bulb relative to the initial position.
The invention also discloses a computer readable storage medium, on which a computer program is stored, which when being executed by a processor implements the steps of the slip ring positioning method.
After the technical scheme is adopted, compared with the prior art, the method has the following beneficial effects:
1. the CT slip ring with the light source positioning mode is used for replacing the CT slip ring with the traditional mechanical coding belt, so that the risk of collision damage in the installation process can be reduced, the risk of installation damage of the slip ring is reduced, the problem of hole blocking of the coding belt is avoided, the later-stage maintenance is convenient, and the cost is reduced to a certain extent.
Drawings
FIG. 1 is a schematic diagram of a light source type encoder tape provided by the present invention;
FIG. 2 is an axial view of the slip ring provided by the present invention;
FIG. 3 is a radial view of the slip ring provided by the present invention;
fig. 4 is a schematic diagram of an included angle between a ball tube and a slip ring according to the present invention.
Detailed Description
Advantages of the invention are further illustrated in the following description, taken in conjunction with the accompanying drawings and detailed description.
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.
The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.
It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure. The word "if" as used herein may be interpreted as "at … …" or "at … …" or "in response to a determination" depending on the context.
In the description of the present invention, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
In the description of the present invention, unless otherwise specified and defined, it should be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, mechanical or electrical, or may be in communication with each other between two elements, directly or indirectly through intermediaries, as would be understood by those skilled in the art, in view of the specific meaning of the terms described above.
In the following description, suffixes such as "module", "component", or "unit" for representing elements are used only for facilitating the description of the present invention, and are not of specific significance per se. Thus, "module" and "component" may be used in combination.
Referring to fig. 1-4, the invention discloses a slip ring positioning system of a CT frame, which comprises a slip ring, wherein the slip ring comprises an axial inner ring surface, an axial outer ring surface and radial side ring surfaces at two sides. The invention provides a light source type coding belt which is arranged on an outer ring surface, in particular to a first belt ring which is also an axial surface is arranged on the outer ring surface of a slip ring, and the light source type coding belt is arranged on the first belt ring. And, it is understood herein that the light source type code band is the first band.
A plurality of first light sources and second light sources are alternately arranged on the first belt ring (light source type coding belt), the whole first belt ring is fully distributed by the plurality of first light sources and the plurality of second light sources, namely the first light sources and the second light sources are completely and alternately distributed by 360 degrees, and the adjacent two light sources are equidistantly arranged. And obtaining the angle between the two adjacent light sources according to the number of the first light sources and the second light sources.
The wavelengths of the light emitted by the first light source and the second light source are different for the sensor to distinguish. Preferably, the first light source emits red light with a wavelength of 770-622 nm, and the second light source emits orange light with a wavelength of 622-597 nm.
The photoelectric sensor is used for capturing different lights emitted by the first light source and the second light source, and the counting module counts the lights.
When the slip ring rotates, the first light source and the second light source on the outer ring surface are alternately captured by the photoelectric sensor, and the counting module counts the number of the captured first light source and second light source, so that the angle of the slip ring under the current counting can be obtained according to the counting and the angle between the two adjacent light sources. If the counting is the initial position before, the angle passed by the slip ring under the current counting represents the actual angle position of the slip ring. If the previous counting is not the initial position, the actual angle position of the slip ring can be obtained by adding the angle before counting.
Specifically, referring to fig. 1, ase:Sub>A black-and-white point is ase:Sub>A circle of 1024 first light sources and 1024 second light sources which are alternately arranged at 360 degrees, the initial count of the slip ring is ase:Sub>A, when the slip ring is at any position, the slip ring counter value is B, and the angle of the slip ring relative to 0 ° (initial position) is (B-ase:Sub>A) ×360/(1024).
Here, "0 ° (initial position)" is a relative value, and actually the slip ring is not marked with an obvious degree, that is, the slip ring does not have a fixed angle of 0 °, 30 °, 90 ° or the like, and any position of the slip ring may be defined as 0 ° (initial position) for the sake of calculation.
Further, the outer ring surface is also provided with a second belt ring, the second belt ring is parallel to the first belt ring and is an axial surface, and it can be understood that the second belt ring is arranged on the side edge of the first belt ring, and the first belt ring and the second belt ring form a light source type coding belt together. The second belt loop is provided with a third light source. When the photoelectric sensor captures the third light source, the current position is defined as an initial position, and the count of the counting module is emptied at the initial position. The third light source may be referred to as a home light source, which emits light having a wavelength different from that of both the first and second light sources, and preferably, may be yellow light having a wavelength of 597 to 577 nm.
The whole second band has only one home light source (third light source). And the location on the first strap corresponding to the third light source is empty such that either the first light source or the second light source is not captured on the first strap when the photosensor captures the third light source on the second strap.
Preferably, referring to fig. 3, the photoelectric sensor includes a first photoelectric sensor for capturing light emitted from the first light source and the second light source, and a second photoelectric sensor for capturing light emitted from the third light source.
Preferably, the CT tube further comprises an angle measuring module, wherein the angle measuring module is used for measuring the angle between the slip ring and the CT tube. For example, when the home light source (third light source) is detected, the motion is stopped immediately, the angle difference alpha between the spherical tube 0 DEG and the slip ring 0 DEG (initial position) is measured by the angle measuring module, and the angle of the slip ring under the current count can be obtained by combining the count and the angle between the adjacent two light sources after the next slip ring motion stops, so that the position of the slip ring can be obtained.
Still taking the example of 1024 first light sources and second light sources alternately arranged at 360 degrees in the preferred embodiment, the initial count of the slip ring is ase:Sub>A, and when the slip ring is at any position, the slip ring counter value is B, and the angle of the bulb relative to 0 ° (initial position) is α+ (B-ase:Sub>A) x 360/(1024).
Preferably, the outer ring surface is further provided with a third belt ring, and the third belt ring is generally parallel to the first belt ring and the second belt ring. Referring to fig. 2-3, a radio frequency antenna is disposed on the third band. The system also comprises a radio frequency module, the radio frequency module and the encoder are integrated together and are arranged on the outer side of the slip ring, the radio frequency module and the encoder are arranged at the same axial position and correspond to the position of the radio frequency antenna in the radial direction, and the whole system comprises the radio frequency antenna module and the light source type encoder module.
The CT slip ring adopting the light source positioning mode adopts the light source type coding band (1024A/B light source and 1 home light source), replaces the traditional CT slip ring of the mechanical coding band, changes the installation position of the encoder, changes the reading logic, can reduce the risk of collision damage in the installation process, reduces the risk of the installation damage of the slip ring, avoids the problem of hole blockage of the coding band, is convenient to maintain in the later stage, and reduces the cost to a certain extent.
The invention also discloses a slip ring positioning method of the CT frame, based on the slip ring positioning system, when the slip ring rotates, the photoelectric sensor alternately captures the first light source and the second light source on the outer ring surface, and the counting module counts the number of the captured first light source and second light source, and acquires the current position of the slip ring according to the counting and the angles between the two adjacent light sources.
In a preferred embodiment, 1024A/B position light sources (first light source, second light source) and home light source (third light source) arranged outside the slip ring are driven to the photoelectric sensor positioned on the encoder during the rotation process of the slip ring; the encoder counts according to the received light beams with different colors and positions in the rotating process, and the encoder determines the current position of the slip ring through counting and feeds back the reading.
Referring to fig. 4, when the home light source is detected, the movement is stopped immediately, and the angle difference α between the ball tube 0 ° and the slip ring 0 ° is measured by an angle measuring module (typically, an inclinometer). And the slip ring counter is set to an initial value a. In this embodiment, the first light source and the second light source use frequency multiplication by 4, and the slip ring can generate 1024 x 4 pulses per ring after frequency multiplication by 4. The slip ring unit pulse corresponding angle is measured to be 360/(1024×4). When the slip ring is at any position, the slip ring counter value is B, and the slip ring angle with respect to 0 ° is (B-ase:Sub>A) 360/(1024×4). Correspondingly, the real-time angle of the bulb tube is alpha+ (B-A) 360/(1024×4).
The invention also discloses a computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of the slip ring positioning method.
It should be noted that the embodiments of the present invention are preferred and not limited in any way, and any person skilled in the art may make use of the above-disclosed technical content to change or modify the same into equivalent effective embodiments without departing from the technical scope of the present invention, and any modification or equivalent change and modification of the above-described embodiments according to the technical substance of the present invention still falls within the scope of the technical scope of the present invention.
Claims (10)
1. The slip ring positioning system of the CT rack is characterized by comprising a slip ring, wherein a first belt ring is arranged on the outer ring surface of the slip ring, a plurality of first light sources and second light sources are alternately arranged on the first belt ring, and the wavelengths of the first light sources and the second light sources are different;
the device also comprises an encoder, wherein the encoder corresponds to the outer ring surface and comprises a photoelectric sensor and a counting module;
When the slip ring rotates, the first light source and the second light source on the outer ring surface are alternately captured by the photoelectric sensor, the counting module counts the number of the captured first light source and second light source, and the current position of the slip ring is obtained according to the counting and the angle between the two adjacent light sources.
2. The slip ring positioning system of claim 1, wherein a second band is further provided on the outer annulus, the second band being parallel to the first band, the second band having a third light source provided thereon;
When the photoelectric sensor captures the third light source, the current position is defined as an initial position, and the counting of the counting module is emptied when the current position is the initial position.
3. The slip ring positioning system of claim 2, wherein a location on the first band corresponding to the third light source is empty such that the first light source or the second light source is not captured on the first band when a photosensor captures the third light source on the second band.
4. The slip ring positioning system of claim 2, wherein the photosensor comprises a first photosensor and a second photosensor, the first photosensor for capturing the first and second light sources; the second photosensor is for capturing the third light source.
5. The slip ring positioning system of claim 2, further comprising an angle measurement module for measuring an angle between the slip ring and a CT bulb.
6. The slip ring positioning system of claim 2, wherein a third band is further provided on the outer annulus, the third band having a radio frequency antenna thereon;
The system also comprises a radio frequency module, wherein the radio frequency module and the encoder are arranged at the same axial position in the axial direction and correspond to the position of the radio frequency antenna in the radial direction.
7. The slip ring positioning system of claim 2, wherein the first light source emits 770-622 nm wavelength red light, the second light source emits 622-597 nm wavelength orange light, and the third light source emits 597-577 nm wavelength yellow light.
8. A slip ring positioning method of a CT gantry, characterized in that the slip ring positioning system according to any of the preceding claims 2-7 is based on, the method comprising:
When the slip ring rotates, the photoelectric sensor alternately captures the first light source and the second light source on the outer ring surface, and meanwhile the counting module counts the number of the captured first light source and second light source, and the current position of the slip ring is obtained according to the counting and the angles between the two adjacent light sources.
9. The slip ring positioning method of claim 8, further comprising:
When the photoelectric sensor captures the third light source, defining the current position as an initial position, clearing the count of the counting module when the current position is the initial position, and measuring the angle alpha between the slip ring and the CT bulb by the angle measuring module;
when the slip ring rotates, the photoelectric sensor alternately captures the first light source and the second light source on the outer ring surface, the counting module counts the number of the captured first light source and second light source, the angle of the slip ring relative to the initial position is obtained according to the counting and the angle between the two adjacent light sources, and the angle alpha is combined to obtain the angle of the bulb relative to the initial position.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, carries out the steps of the slip ring positioning method according to any one of claims 8-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211189782.9A CN115493528B (en) | 2022-09-28 | 2022-09-28 | Slip ring positioning system and method of CT frame and computer readable storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211189782.9A CN115493528B (en) | 2022-09-28 | 2022-09-28 | Slip ring positioning system and method of CT frame and computer readable storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115493528A CN115493528A (en) | 2022-12-20 |
| CN115493528B true CN115493528B (en) | 2024-05-24 |
Family
ID=84472296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211189782.9A Active CN115493528B (en) | 2022-09-28 | 2022-09-28 | Slip ring positioning system and method of CT frame and computer readable storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115493528B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2747541Y (en) * | 2004-11-12 | 2005-12-21 | 深圳思创光电信息技术有限公司 | Colour bar code for character wheel of mechanical counter of meter and digital electric signal output device |
| CN101629832A (en) * | 2009-07-28 | 2010-01-20 | 上海电力学院 | Rotary encoder based on color discrimination |
| CN102755171A (en) * | 2011-04-29 | 2012-10-31 | 上海西门子医疗器械有限公司 | Closed-loop control structure and closed-loop control method for CT (computed tomography) rotating system |
| CN103471640A (en) * | 2013-09-06 | 2013-12-25 | 刁宇浩 | Numerical code direct reader of intelligent meter |
| CN104457806A (en) * | 2014-12-02 | 2015-03-25 | 佛山轻子精密测控技术有限公司 | Composite type rotary encoder and measurement method thereof |
| CN105844317A (en) * | 2016-04-26 | 2016-08-10 | 洛阳愿景科技有限公司 | Color coding digital coded disc |
| CN106022199A (en) * | 2016-05-31 | 2016-10-12 | 王灿锋 | Photomagnetic information coding disc, information reading device thereof, and information reading method |
| CN107764209A (en) * | 2017-12-05 | 2018-03-06 | 北京科瑞思创测控科技有限公司 | A kind of sleeve rotation angle detecting apparatus |
| CN110830110A (en) * | 2019-10-28 | 2020-02-21 | 中船九江精达科技股份有限公司 | Electric transmission device for non-contact transmission of high-speed signals and implementation method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6980714B2 (en) * | 2003-09-26 | 2005-12-27 | Moog Components Group Inc. | Fiber optic rotary joint and associated reflector assembly |
| US7138623B2 (en) * | 2004-12-13 | 2006-11-21 | Magna Powertrain Usa, Inc. | Power transfer device with contactless optical encoder and color reflective surface |
| 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 |
-
2022
- 2022-09-28 CN CN202211189782.9A patent/CN115493528B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2747541Y (en) * | 2004-11-12 | 2005-12-21 | 深圳思创光电信息技术有限公司 | Colour bar code for character wheel of mechanical counter of meter and digital electric signal output device |
| CN101629832A (en) * | 2009-07-28 | 2010-01-20 | 上海电力学院 | Rotary encoder based on color discrimination |
| CN102755171A (en) * | 2011-04-29 | 2012-10-31 | 上海西门子医疗器械有限公司 | Closed-loop control structure and closed-loop control method for CT (computed tomography) rotating system |
| CN103471640A (en) * | 2013-09-06 | 2013-12-25 | 刁宇浩 | Numerical code direct reader of intelligent meter |
| CN104457806A (en) * | 2014-12-02 | 2015-03-25 | 佛山轻子精密测控技术有限公司 | Composite type rotary encoder and measurement method thereof |
| CN105844317A (en) * | 2016-04-26 | 2016-08-10 | 洛阳愿景科技有限公司 | Color coding digital coded disc |
| CN106022199A (en) * | 2016-05-31 | 2016-10-12 | 王灿锋 | Photomagnetic information coding disc, information reading device thereof, and information reading method |
| CN107764209A (en) * | 2017-12-05 | 2018-03-06 | 北京科瑞思创测控科技有限公司 | A kind of sleeve rotation angle detecting apparatus |
| CN110830110A (en) * | 2019-10-28 | 2020-02-21 | 中船九江精达科技股份有限公司 | Electric transmission device for non-contact transmission of high-speed signals and implementation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 光电编码器测速方法现状与展望;贾兴丹;万秋华;赵长海;杜颖财;于海;;仪表技术与传感器;20180315(03);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115493528A (en) | 2022-12-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20150156494A1 (en) | Methods and apparatus for data communication across a slip ring | |
| JP4388636B2 (en) | Method and apparatus for exchanging data with an imaging device | |
| CN106501812B (en) | Laser scanning range unit | |
| CN105698750B (en) | The method of 360 degree of range laser radars for non-contact power | |
| US7535009B2 (en) | Device for generating images and/or projections | |
| EP3123203B1 (en) | Dead pixel identification in positron emission tomography (pet) | |
| CN115493528B (en) | Slip ring positioning system and method of CT frame and computer readable storage medium | |
| CN105092610B (en) | Scanning imaging system | |
| CN113701638A (en) | Material three-dimensional form high-speed multi-angle scanning detection device and scanning detection system | |
| CN108007390A (en) | A kind of pendulum mirror linearity test system based on CCD | |
| CN111325045A (en) | Bar code positioning system and bar code positioning method for scanner | |
| US20140003582A1 (en) | Contactless information transfer in ct imaging modality | |
| CN1415974A (en) | Local area real time self-difference position identifying system and identifying method thereof | |
| EP2362187B1 (en) | Meter register having an encoder for measuring material flow and an algorithm to selectively block signal transmission | |
| CN206258580U (en) | A kind of laser scanning and ranging equipment | |
| CN209230553U (en) | A kind of new revolving structure of bearing channel roundness measuring instrument | |
| EP1132756A3 (en) | Transmission radiation corrected gamma camera | |
| CN205861895U (en) | Rotary laser range radar | |
| CN110161515A (en) | A kind of house measurement system based on laser ranging | |
| CN117308827B (en) | Detection method using CT rotation angle detection system | |
| US6271517B1 (en) | Pet scanner point source locator | |
| CN206057566U (en) | Laser scanning range-finding device | |
| Badawi et al. | A comparison of normalization effects on three whole-body cylindrical 3D PET systems | |
| JP2005176973A (en) | Radiographic image processing device, radiographic image processing system, radiographic system, radiographic device, radiographic image processing method, computer-readable storage medium, and program | |
| CN206162610U (en) | Flight baggage tag information knows read mean |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |