CN216979755U - Camera Link relay equipment and system thereof - Google Patents
Camera Link relay equipment and system thereof Download PDFInfo
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- CN216979755U CN216979755U CN202220933323.6U CN202220933323U CN216979755U CN 216979755 U CN216979755 U CN 216979755U CN 202220933323 U CN202220933323 U CN 202220933323U CN 216979755 U CN216979755 U CN 216979755U
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Abstract
The system comprises a Camera Link Camera, a Camera Link relay device and an intelligent device, wherein the number of the Camera Link relay devices is determined by rounding up after dividing the length L of a Camera Link cable between the Camera Link Camera and the intelligent device by a preset distance N. A Camera Link relay device Camera Link input unit, a Camera Link output unit, a power input unit, an equalizer, and a corrector; the equalizer is used for compensating the high-frequency component; the corrector is used for correcting the sampled data; the method and the device ensure the stability of the data signal and eliminate the offset time of the data signal and the clock signal.
Description
Technical Field
The application relates to the field of industrial cameras, in particular to Camera Link relay equipment and a system thereof.
Background
Camera Link is an interface designed for industrial cameras, developed from Channel Link technology. The Camera Link protocol standardizes interfaces between cameras and acquisition cards, and uses uniform connectors, cables, signals and data formats.
In the related art, as shown in fig. 1, after image data is acquired by a Camera Link Camera 200, the image data is sent to a Camera Link acquisition card 101 through a Camera Link cable, and image processing is completed by an industrial personal computer 100. Because the Camera Link protocol adopts a synchronous clock to sample a plurality of groups of parallel data, the attenuation of high-frequency signal components is larger than that of low-frequency components in the signal transmission process according to the skin effect, so that the signal quality of a receiving end is reduced.
However, as the length of the Camera Link cable between the Camera Link Camera 200 and the industrial personal computer 100 increases, the signal quality deteriorates, the offset time between data and a clock becomes large, and the reception requirement cannot be satisfied.
SUMMERY OF THE UTILITY MODEL
The application provides Camera Link relay equipment and a system thereof, which aim to solve the technical problems that the quality of signals is deteriorated and the offset time between data and a clock is increased due to overlong Camera Link cables between the existing Camera Link Camera and an industrial personal computer.
In order to achieve the above purpose, the embodiments of the present application adopt the following technical solutions:
in a first aspect, the present application provides a Camera Link relay device, including a Camera Link input unit, a Camera Link output unit, a power input unit, an equalizer, and a corrector;
the equalizer is connected with the Camera Link input unit in a communication mode and is used for compensating high-frequency components; the corrector is in communication connection with the equalizer and the Camera Link output unit, and is used for correcting sampled data; the power input unit is in communication with the equalizer and the corrector.
With reference to the first aspect, in one implementation manner, the equalizer includes a plurality of cache chips, and the cache chips have a receive equalization function.
With reference to the first aspect, in an implementation manner, the corrector includes a plurality of first receiving chips and a plurality of second receiving chips, and the first receiving chips and the second receiving chips are communicatively connected.
With reference to the first aspect, in an implementation manner, the Camera Link relay device further includes a power supply and a status indication unit;
the power supply and state indicating unit is in communication connection with the power supply input unit, the equalizer and the corrector, and the power supply and state indicating unit is used for displaying states.
With reference to the first aspect, in one implementation manner, the voltage of the power input unit is 5V-24V.
With reference to the first aspect, in an implementation manner, the Camera Link input unit includes a input interfaces, and the Camera Link output unit includes B output interfaces, where a is equal to B.
As can be seen from the above technical solutions, the present application provides a Camera Link relay device Camera Link input unit, a Camera Link output unit, a power input unit, an equalizer, and a corrector; the equalizer is connected with the Camera Link input unit in a communication mode and is used for compensating high-frequency components; the corrector is in communication connection with the equalizer and the Camera Link output unit, and is used for correcting sampled data; the power input unit is in communication with the equalizer and the corrector. The Camera Link relay equipment ensures the stability of data signals, eliminates the offset time of the data signals and clock signals, and ensures that the offset time of data and clocks in a Camera Link cable is within the range required by a Camera Link protocol.
In a second aspect, the present application provides a system with a Camera Link relay device, comprising a Camera Link Camera, m Camera Link relay devices of the first aspect, and an intelligent device;
the Camera Link cameras are in communication connection with the intelligent equipment through m Camera Link relay devices;
the number m of the Camera Link trunking devices in the system with the Camera Link trunking devices is determined by rounding up after dividing the length of the Camera Link cable between the Camera Link Camera and the intelligent device by a preset distance, wherein the distance of the Camera Link cable between the Camera Link Camera and the intelligent device is greater than the preset distance.
With reference to the second aspect, in an implementation manner, the number m of Camera Link relay devices in the system with Camera Link relay devices is determined according to the Camera Link cable length between the Camera Link Camera and the intelligent device divided by a preset distance and then rounded up, and the number m of Camera Link relay devices is calculated according to the following formula:
in the formula, m is the number of the Camera Link relay devices, L is the length of a Camera Link cable between the Camera Link Camera and the intelligent device, and N is a preset distance.
According to the technical scheme, the system with the Camera Link relay device comprises a Camera Link Camera, a Camera Link relay device and an intelligent device, wherein the number m of the Camera Link relay devices is determined by rounding up after dividing the Camera Link cable length L between the Camera Link Camera and the intelligent device by the preset distance N. The method and the device ensure the quality of the data signals in the long-distance transmission process through multiple cascading and eliminate the offset time of the data signals and the clock signals.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a conventional industrial personal computer connected to a Camera Link Camera according to the present application;
fig. 2 is a schematic structural diagram of a Camera Link relay device according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of another Camera Link relay device according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a system having a Camera Link relay device according to an embodiment of the present application;
wherein: 100-industrial personal computer; 101-Camera Link acquisition card; 200-Camera Link Camera; 300-Camera Link relay device; 301-Camera Link input cell; 302-an equalizer; 303-a corrector; 304-Camera Link output unit; 305-a power input unit; 306-power and status indication unit; 400-smart device.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Because the Camera Link protocol adopts a synchronous clock to sample a plurality of groups of parallel data, the attenuation of high-frequency signal components is larger than that of low-frequency components in the signal transmission process according to the skin effect, so that the signal quality of a receiving end is reduced. At a clock frequency of 85MHz, when the length of the Camera Link cable exceeds 6 meters (or the cable performance is improved, and can reach 8 meters), at this time, the signal quality cannot meet the requirement of the input, and the offset time exceeds the requirement of the Camera Link protocol (where the Camera Link protocol offsets the signal transmission time as shown in table 1 below); resulting in errors in the transmitted data. If the above problem is solved by reducing the transmission rate, the production efficiency is reduced.
TABLE 1 Camera Link protocol offset time for signal transmission
| Pixel Clock Frequency | Data rate | RSKM | Mask Width | Mask Height |
| 40MHz | 280Mbps | 1685ps | 540ps | ±100mV |
| 66MHz | 462Mbps | 915ps | 540ps | ±100mV |
| 85MHz | 595Mbps | 650ps | 540ps | ±100mV |
To solve the problems that the Camera Link cable is too long, which causes deterioration of signal quality and increase of offset time between data and a clock, some embodiments of the present application provide a Camera Link relay device, as shown in fig. 2 and 3, where the Camera Link relay device 300 includes a Camera Link input unit 301, a Camera Link output unit 304, a power supply input unit 305, an equalizer 302, and a corrector 303.
The equalizer 302 is communicatively connected to the Camera Link input unit 301, and the equalizer 302 is configured to compensate for the high frequency component and recover the signal quality.
In some embodiments, the equalizer 302 includes a plurality of buffer chips having receive equalization functionality. The buffer chip can be a DS25BR100, and the DS25BR100 has the functions of transmitting pre-emphasis and receiving equalization, and can compensate 16dB of attenuation at most when high-frequency components are compensated.
The corrector 303 is communicatively connected to the equalizer 302 and the Camera Link output unit 304, and the corrector 303 is configured to correct the sampled data so that the data and clock offset time is within a range required by the Camera Link protocol, and no data sampling error occurs. The LVDS level corrected by the corrector 303 completes data transfer through the Camera Link output unit 304.
In some embodiments, the corrector 303 includes a plurality of first receiving chips and a plurality of second receiving chips, the first receiving chips converting four LVDS data streams back into 28-bit LVCMOS/LVTTL data. At a transmit clock frequency of 85MHz, 28 bits of TTL data are transmitted at a rate of 595Mbps per LVDS data channel. The data throughput is 2.38Gbit/s using an 85MHz clock. The second receiving chip converts the 28-bit LVCMOS/LVTTL data into 4 LVDS (low voltage differential signaling) data streams, and each cycle of 28-bit input data of the transmission clock is sampled and transmitted. The first receiving chip may be a DS90CR288 chip, which may complete data acquisition, and the output level thereof is the LVTTL level. The second receiving chip can be a DS90CR287 chip which converts the LVTTL level into the LVDS level required by the Camera Link protocol.
Through the power input unit 305, a corresponding power requirement is provided for each unit on the Camera Link relay device, and the power supply stability of the Camera Link relay device is ensured. Wherein, the voltage of the power input unit 305 is 5V-24V.
The Camera Link relay device further includes a power supply and status indication unit 306, and the power supply and status indication unit 306 includes different display lamps, and prompts the status of the power supply input unit 305, the status of the equalizer 302, the status of the corrector 303, and the error reminding status of the Camera Link relay device 300 through the different display lamps.
The Camera Link input unit 301 includes a input interfaces, and the Camera Link output unit 304 includes B output interfaces, where a is equal to B.
As can be seen from the above technical solutions, the present application provides a Camera Link relay device Camera Link input unit, a Camera Link output unit, a power input unit, an equalizer, and a corrector; the equalizer is connected with the Camera Link input unit in a communication mode and is used for compensating high-frequency components; the corrector is in communication connection with the equalizer and the Camera Link output unit and is used for correcting sampled data; the power input unit is in communication with the equalizer and the corrector. The Camera Link relay equipment ensures the stability of the data signal, eliminates the offset time of the data signal and the clock signal, and ensures that the offset time of the data and the clock in the Camera Link cable is in the range required by the Camera Link protocol.
Some embodiments of the present application provide a system with a Camera Link relay device, as shown in fig. 4, the system includes a Camera Link Camera 200, a Camera Link relay device 300, and a smart device 400, and a Camera Link cable distance between the Camera Link Camera 200 and the smart device 400 is greater than a preset distance N.
The Camera Link input unit of the Camera Link relay device 300 is communicatively connected with the Camera Link Camera 200; the Camera Link output unit of Camera Link relay device 300 is communicatively connected to intelligent device 400 or another Camera Link relay device. The smart device 400 may be a computer, an industrial personal computer, or other host device having a control chip.
When a Camera Link cable between the Camera Link Camera and the intelligent device is greater than or equal to a preset distance N and smaller than a preset distance 2N, the Camera Link input unit of the first Camera Link relay device is in communication connection with the Camera Link Camera; the Camera Link output unit of the first Camera Link relay device is in communication connection with the intelligent device.
When a Camera Link cable between the Camera Link Camera and the intelligent device is greater than or equal to a preset distance 2N and smaller than a preset distance 3N, the system with the Camera Link relay device comprises two Camera Link relay devices, and a Camera Link input unit of the first Camera Link relay device is in communication connection with the Camera Link Camera; the Camera Link output unit of the first Camera Link relaying device is communicatively connected to the Camera Link input unit of the second Camera Link relaying device; the Camera Link output unit of the second Camera Link relay device is communicatively coupled to the smart device.
By analogy, the number m of the Camera Link relay devices in the system with the Camera Link relay devices is determined by dividing the length L of the Camera Link cable between the Camera Link Camera and the intelligent device by the preset distance N and then rounding up, and the number m of the Camera Link relay devices is obtained by calculation according to the following formula:
in the formula, m is the number of the Camera Link relay devices, L is the length of a Camera Link cable between the Camera Link Camera and the intelligent device, and N is a preset distance.
The number of the Camera Link relay devices in the system with the Camera Link relay devices is m, the Camera Link cable between the Camera Link Camera and the intelligent device is divided into m sections, and the distance of each section is smaller than a preset distance N.
In some embodiments, the preset distance is calculated to be 8 meters, for example, when the length of the Camera Link cable between the Camera Link Camera and the smart device is 20 meters, the number of the Camera Link relay devices in the system with the Camera Link relay devices is 3, the Camera Link cable between the Camera Link Camera and the smart device is divided into 3 segments, and each segment of the distance is smaller than 8 meters.
According to the technical scheme, the system with the Camera Link relay device comprises a Camera Link Camera, the Camera Link relay device and an intelligent device, wherein the number m of the Camera Link relay devices is determined by dividing the length L of the Camera Link cable between the Camera Link Camera and the intelligent device by a preset distance N and rounding up. According to the method and the device, the Camera Link relay devices are cascaded for multiple times, the quality of data signals in the long-distance transmission process is guaranteed, and the offset time of the data signals and the clock signals is eliminated.
The above-mentioned contents are only for explaining the technical idea of the present application, and the protection scope of the present application is not limited thereby, and any modification made on the basis of the technical idea presented in the present application falls within the protection scope of the claims of the present application.
Additionally, the order in which elements and sequences of the processes described herein are processed, the use of alphanumeric characters, or the use of other designations, is not intended to limit the order of the processes and methods described herein, unless explicitly claimed. While various presently contemplated embodiments have been discussed in the foregoing disclosure by way of example, it should be understood that such detail is solely for that purpose and that the appended claims are not limited to the disclosed embodiments, but, on the contrary, are intended to cover all modifications and equivalent arrangements that are within the spirit and scope of the embodiments herein. For example, although the system components described above may be implemented by hardware devices, they may also be implemented by software-only solutions, such as installing the described system on an existing server or mobile device.
Similarly, it should be noted that in the preceding description of embodiments of the application, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the embodiments. This method of disclosure, however, is not intended to require more features than are expressly recited in the claims. Indeed, the embodiments may be characterized as having less than all of the features of a single embodiment disclosed above.
The entire contents of each patent, patent application publication, and other material cited in this application, such as articles, books, specifications, publications, documents, and the like, are hereby incorporated by reference into this application. Except where the application is filed in a manner inconsistent or contrary to the present disclosure, and except where the claim is filed in its broadest scope (whether present or later appended to the application) as well. It is noted that the descriptions, definitions and/or use of terms in this application shall control if they are inconsistent or contrary to the statements and/or uses of the present application in the material attached to this application.
Claims (10)
1. A Camera Link relay device, comprising a Camera Link input unit, a Camera Link output unit, a power supply input unit, an equalizer, and a corrector;
the equalizer is connected with the Camera Link input unit in a communication mode and is used for compensating high-frequency components;
the corrector is in communication connection with the equalizer and the Camera Link output unit and is used for correcting sampled data;
the power input unit is in communication with the equalizer and the corrector.
2. The Camera Link relay device as claimed in claim 1, wherein said equalizer comprises a plurality of buffer chips, and said buffer chips have a reception equalization function.
3. The Camera Link relay device of claim 2, wherein the buffer chip is a DS25BR100 chip.
4. The Camera Link relay device of claim 1, wherein the corrector comprises a plurality of first receiving chips and a plurality of second receiving chips, and wherein the first receiving chips and the second receiving chips are communicatively coupled.
5. The Camera Link relay device as claimed in claim 4, wherein the first receiving chip is a DS90CR288 chip, and the second receiving chip is a DS90CR287 chip.
6. The Camera Link relay device of claim 1, wherein the Camera Link relay device further comprises a power supply and status indication unit;
the power supply and state indicating unit is in communication connection with the power supply input unit, the equalizer and the corrector, and the power supply and state indicating unit is used for displaying states.
7. The Camera Link relay device as claimed in claim 1, wherein the voltage of said power input unit is 5V-24V.
8. The Camera Link relay device according to claim 1, wherein the Camera Link input unit comprises a input interfaces and the Camera Link output unit comprises B output interfaces, wherein a equals B.
9. A system having a Camera Link relay device, comprising a Camera Link Camera, the Camera Link relay device of any of claims 1-8, and a smart device;
the Camera Link cameras are in communication connection with the intelligent equipment through m Camera Link relay devices;
the number m of the Camera Link relay devices is determined by rounding up after dividing the length of the Camera Link cable between the Camera Link Camera and the intelligent device by a preset distance, wherein the distance of the Camera Link cable between the Camera Link Camera and the intelligent device is greater than the preset distance.
10. The system of claim 9, wherein the number m of Camera Link relay devices is determined by dividing the length of the Camera Link cable between the Camera Link Camera and the intelligent device by a preset distance and rounding up, and the number m of Camera Link relay devices is calculated according to the following formula:
in the formula, m is the number of the Camera Link relay devices, L is the length of a Camera Link cable between the Camera Link Camera and the intelligent device, and N is a preset distance.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220933323.6U CN216979755U (en) | 2022-04-20 | 2022-04-20 | Camera Link relay equipment and system thereof |
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| CN202220933323.6U CN216979755U (en) | 2022-04-20 | 2022-04-20 | Camera Link relay equipment and system thereof |
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| CN216979755U true CN216979755U (en) | 2022-07-15 |
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| CN202220933323.6U Active CN216979755U (en) | 2022-04-20 | 2022-04-20 | Camera Link relay equipment and system thereof |
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