KR102482112B1 - Camera link cable and method for manufacturing the same - Google Patents

Abstract

Disclosed is a camera link cable capable of securing an excellent data transmission performance, comprising: a plurality of signal lines including a conductor line and an insulating coating that covers an outer circumferential surface of the conductor line; a metal foil taped to surround the entire signal lines; an insulating tape taped to surround an outer circumferential surface of the metal foil; an insulating wrapping tape wrapped around an outer circumferential surface of the insulating tape; a first shield wrapped around an outer circumferential surface of the insulating wrapping tape and having conductivity; an EMI tape wrapped around an outer circumferential surface of the first shield and having conductivity; a second shield wrapped around an outer circumferential surface of the EMI tape and having conductivity; a conductive tape extended and attached to a connector housing from a partial area of the second shield; and an insulating masking tape wrapped around outer circumferential surfaces of the second shield and the conductive tape.

Description

Camera link cable and its manufacturing method {CAMERA LINK CABLE AND METHOD FOR MANUFACTURING THE SAME}

The present invention relates to a camera link cable and a method for manufacturing the same, and more particularly, to a camera link cable and a method for manufacturing the same, in which cables and connectors complying with camera link standards can be interconnected without data loss and noise.

CameraLink ^TM , a high-performance interface applied to industrial cameras for factory automation, is a standard interface recommended for data transmission rates of about 800MB/s from the current 100MB/s. The camera link transmits RS-644 serially, and theoretically, high-speed transmission of 2.3 Gbps is possible.

The camera link cable is a cable for realizing the camera link standard, enabling high-speed data transmission, preventing data loss that may occur during data transmission, and having a structure for shielding noise.

Connectors defined as Mini Delta Ribbon (MDR) or Shrunk Delta Ribbon (SDR) may be connected to both ends of the camera link cable.

Meanwhile, as camera technology develops, more data transmission in a shorter time is required, but the data transmission length of a camera link cable is limited. In actual field, the data transmission length through the camera link cable is limited to approximately 5 m or less. In particular, the pitch of the MDR-26 connector connected to both ends of the camera link cable was 1.25mm, but the pitch of the SDR-26 connector for application to high-speed cameras was 0.8mm, which caused electromagnetic effects between pins on the connector, resulting in data loss and There was a problem with noise.

In addition, in the process of processing the end of the camera link cable during the work to connect the connector and the camera link cable, as the shielding structure of the cable is removed, the characteristic impedance of the cable becomes larger than the threshold value, causing loss and noise in data transmission. A problem arises.

The matters described as the background art above are only for improving understanding of the background of the present invention, and should not be taken as an admission that they correspond to prior art already known to those skilled in the art.

Accordingly, the present invention relates to a camera link cable capable of preventing an impedance increase during processing for connection with a connector and thereby suppressing data loss and noise generation, and a manufacturing method thereof.

As a means for solving the above technical problem, the present invention provides a plurality of signal lines including a conductor line and an insulating coating covering an outer circumferential surface of the conductor line, a metal foil taped to surround the entirety of the plurality of signal lines, and the metal foil Insulation tape taped to surround an outer circumferential surface, an insulating wrapping tape wrapped around an outer circumferential surface of the insulating tape, a first shield covering an outer circumferential surface of the insulating wrapping tape and having conductivity, an EMI tape covering an outer circumferential surface of the first shield and having conductivity, the above A second shield covering the outer circumferential surface of the EMI tape and having conductivity, a conductive tape extending from a partial area of the second shield to the connector housing, and an insulating masking tape surrounding the outer circumferential surface of the second shield and the conductive tape. A camera link cable is provided.

As another means for solving the above technical problem, the present invention is a camera link cable having a first region having one end connected to a connector and a second region extending from the other end of the first region, wherein the first region comprises a conductor line And a plurality of signal lines including an insulating coating covering the outer circumferential surface of the conductor line, a metal foil taped to surround the entirety of the plurality of signal lines, an insulating tape taped to surround the outer circumferential surface of the metal foil, and an outer circumferential surface of the insulating tape An insulating wrapping tape wrapped around the insulating wrapping tape, a first shield covering the outer circumferential surface of the insulating wrapping tape and having conductivity, an EMI tape covering the outer circumferential surface of the first shield and having conductivity, a second shield covering the outer circumferential surface of the EMI tape and having conductivity, the first shield 2 A camera link cable including a conductive tape extending from a partial region of a shield to a connector housing and attached thereto, and an insulating masking tape surrounding outer circumferential surfaces of the second shield and the conductive tape.

In one embodiment of the present invention, the second region may include a plurality of inner shields made of metal surrounding each pair of the plurality of signal lines, a first filler filled between the inner shield and the signal lines, and the plurality of inner shields. The insulating wrapping tape covering the entirety, the second filler filled between the plurality of inner shields and the wrapping tape, the first shield covering the outer circumferential surface of the wrapping tape and having conductivity, and the outer circumferential surface of the first shield having conductivity. A second shield and an insulating jacket surrounding an outer circumferential surface of the second shield may be included.

In one embodiment of the present invention, the insulating masking tape may be taped to have an outer diameter equal to the length of the inner diameter of the insulating jacket.

As another means for solving the above technical problem, the present invention is a plurality of signal lines including a conductor line and an insulating coating covering an outer circumferential surface of the conductor line, and a metal material surrounding each pair of the plurality of signal lines. A plurality of inner shields, a first filler filled between the inner shield and signal lines, an insulating wrapping tape covering the entirety of the plurality of inner shields, and a second filler filled between the plurality of inner shields and the wrapping tape; Preparing a camera link cable including a first shield covering an outer circumferential surface of a wrapping tape and having conductivity, a second shield covering an outer circumferential surface of the first shield and having conductivity, and an insulating jacket covering the outer circumferential surface of the second shield. exposing the internal structure of the insulating jacket, the second shield, the first shield, and the wrapping tape by cutting or untaping portions of the wrapping tape, and removing the second filler; the inner shield and Removing the first pillar, bonding the exposed signal lines to pins of a connector, respectively, taping metal foil on the exposed portion of the signal line, and taping an insulating tape on the outer circumferential surface of the metal foil Step, taping the wrapping tape to the outer circumferential surface of the insulating tape, and installing a first shield on the outer circumferential surface of the taped wrapping tape, covering a region of the outer circumferential surface of the first shield from which the inner shield was removed; taping an EMI tape having an EMI tape, installing the second shield to cover an outer circumferential surface of the EMI tape, attaching a conductive tape to extend from a partial region of the second shield to the housing of the connector, and It provides a method for manufacturing a camera link cable including the step of taping a shield and an outer circumferential surface of the conductive tape with insulating masking tape.

In one embodiment of the present invention, in the step of taping with the insulating masking tape, the insulating masking tape may be taped to have an outer diameter equal to the length of the inner diameter of the insulating jacket before cutting.

According to the camera link cable and its manufacturing method, it is possible to reduce data loss by ensuring proper noise shielding and preventing an impedance rise in the process of connecting a cable connector. Through this, it is possible to secure a relatively longer length of the camera link cable for data transmission, and it is possible to guarantee excellent data transmission performance even at higher speed data transmission.

The effects obtainable in the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description below. will be.

1 is a view showing an external appearance in which a camera link cable and a connector are coupled according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing a cross section of a second region of the camera link cable shown in FIG. 1 .
FIG. 3 is a cross-sectional view of a first region of the camera link cable shown in FIG. 1;
4 to 12 are diagrams showing a manufacturing method of a camera link cable according to an embodiment of the present invention in process order.
13 is a diagram for explaining a result of testing the performance of a camera link cable according to an embodiment of the present invention.

Hereinafter, a camera link cable and a manufacturing method thereof according to various embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

The advantages and features of the present invention, and how to achieve them, will become clear with reference to the embodiments described below in detail in conjunction with the accompanying drawings.

However, the present invention is not limited by the embodiments disclosed below, but will be implemented in a variety of different forms, and only these embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention pertains. It is provided to completely inform the person who has the scope of the invention, and the present invention is only defined by the scope of the claims.

In addition, in the description of the present invention, if it is determined that related known technologies may obscure the gist of the present invention, a detailed description thereof will be omitted.

1 is a view showing an external appearance in which a camera link cable and a connector are coupled according to an embodiment of the present invention.

Referring to FIG. 1, both ends of the camera link cable 10 according to an embodiment of the present invention have a connector 20 of a standard named MDR (Mini Delta Ribbon)-26 or SDR (Shrunk Delta Ribbon)-26 can be connected

In addition, the camera link cable 10 is divided into a second region R2 corresponding to the first region R1 at both ends of the first region R1 corresponding to a certain length from the position connected to the connector 20. can

The first area R1 is an area where processing is performed to connect the terminal of the connector 20 and the signal line in the camera link cable 10, and the second area R2 is the same as the camera link cable 10 shipped from the factory. It is an area that maintains the shape of

FIG. 2 is a cross-sectional view showing a cross section of a second area of the camera link cable shown in FIG. 1 , and FIG. 3 is a cross-sectional view showing a cross section of the first area of the camera link cable shown in FIG. 1 .

Referring to FIG. 2 , a camera link cable 10 conforming to the camera link standard may be manufactured with a structure including multiple layers of shield and insulation to exclude signal loss and noise interference.

More specifically, the camera link cable 10 in the second region R2 includes a conductor line 31 through which signals are transmitted, and an insulation sheath 32 covering an outer circumferential surface of the conductor line 31 . A plurality of inner shields 33 made of a metal material respectively surrounding a pair of lines and a plurality of signal lines, a first pillar 34 filled between the inner shield 33 and the signal lines, and a plurality of inner shields 33 An insulating wrapping tape 35 surrounding the whole, a plurality of inner shields 33 and a second filler 36 filled between the wrapping tapes 35, and a first shield covering the outer circumferential surface of the wrapping tape 35 and having conductivity 37, a second shield 38 having conductivity surrounding the outer circumferential surface of the first shield 37, and an insulating jacket 39 covering the outer circumferential surface of the second shield 38.

The structure of the camera link cable 10 is a typical camera link cable structure manufactured to enable data communication between a camera and other devices according to the camera link standard.

Since the cable structure shown in FIG. 2 can realize noise shielding through multiple layers of shields, etc., signal loss and noise interference generated from the camera link cable can be minimized if the structure as shown is maintained. And the impedance of the camera link cable can be maintained below the threshold value.

However, in order for such a camera link cable to be applied to the actual field, each of the conductor lines 31 must be electrically connected to each pin of the connector 20, and in order to connect the individual conductor lines 31 to the pins of the connector 20, The cross-sectional structure as shown in FIG. 2 is inevitably deformed.

The first region R1 of the camera link cable according to an embodiment of the present invention is a region where the ends of the camera link cable are processed to connect the conductor lines 31 of the camera link cable to pins of the connector, respectively.

As shown in FIG. 3, the second region of the camera link cable includes a plurality of signal lines including a conductor line 31 through which signals are transmitted and an insulation sheath 32 covering an outer circumferential surface of the conductor line 31 and , Metal foil 41 taped to wrap the entirety of the plurality of signal lines, insulating tape 42 taped to wrap the outer circumferential surface of the metal foil 41, and insulating wrapping tape 35 wrapped around the outer circumferential surface of the insulating tape 42 A first shield 37 covering the outer circumferential surface of the wrapping tape 35 and having conductivity, an EMI tape 43 having conductivity surrounding the outer circumferential surface of the first shield 37, and an outer circumferential surface of the EMI tape 43 A second shield 38 that wraps and has conductivity, and a conductive tape 44 extending from a partial area of the second shield 38 to the housing of the connector 20 and attached thereto, and the second shield 38 and the conductive tape 44 It may include an insulating masking tape 45 surrounding the outer circumferential surface of and an insulating jacket 39 surrounding the outer circumferential surface of the insulating masking tape 45 .

As described above, the second area of the camera link cable is manufactured by processing the end of the first area, and during the processing, some elements constituting the first area may be removed and some other elements may not be completely removed. can be used to shield or insulate other elements.

The structure of the camera link cable according to an embodiment of the present invention described above will be more clearly understood through a description of a method of manufacturing a camera link cable according to an embodiment of the present invention described below.

4 to 12 are diagrams showing a manufacturing method of a camera link cable according to an embodiment of the present invention in process order.

In the method of manufacturing a camera link cable according to an embodiment of the present invention, as shown in FIG. 4, first, a camera link cable corresponding to a second region to which a connector is not connected is prepared, an insulating jacket 39, Parts of the second shield 38, the first shield 37, and the wrapping tape 35 are cut or untaped to expose the structure inside the wrapping tape 35, and the second filler inside the wrapping tape 35 ( 36) can be removed. Here, the insulating jacket 39, the second shield 38, the first shield 37, and the wrapping tape 35 are not completely removed, but only cut to expose the internal structure or taped off, and then the opposite side of the cable end. orientation and can be reused later to restore the cable structure.

Subsequently, as shown in FIG. 5 , the plurality of inner shields 33 and the first pillars 34 made of metal surrounding each pair of signal lines may be removed. In this case, a portion from which the plurality of inner shields 33 and the first pillars 34 are removed may be shorter than the length from which the second pillars 36 are removed. That is, a portion of the inner shield 33 may remain in the region where the second pillar 36 is removed. A plurality of signal lines may be exposed through the removal of the inner shield 33 and the second pillar 36 .

Subsequently, as shown in FIG. 6, a plurality of signal lines may be bonded to pins of the connector 20, respectively. In order to prevent a short circuit between connector pins during the bonding process, bonding between signal lines and connector pins may be performed by applying a pressure welding method.

Subsequently, as shown in FIG. 7 , a metal foil 41 (eg, copper foil) may be taped to the exposed portion of the signal line.

Subsequently, as shown in FIG. 8 , an insulating tape 42 may be taped on an outer circumferential surface of the metal foil 41 to prevent an electrical short circuit caused by the metal foil 41 .

Subsequently, as shown in FIG. 9, the wrapping tape 35, which has been preserved in the opposite direction of the cable in a cut state, is taped again to the outer circumferential surface of the insulating tape 42, and the first shield ( 37) can be reinstalled.

Subsequently, as shown in FIG. 10 , an EMI tape 43 having conductivity may be taped to cover the outer circumferential surface of the first shield 37 , in particular, a region where the inner shield has been removed.

Subsequently, as shown in FIG. 11, the second shield 38, which has been preserved, is again disposed on the outer circumferential surface of the EMI tape 43, so that the second shield 38 wraps around the outer circumferential surface of the taped EMI tape 43. It can be fabricated, extends from a partial region of the second shield 38 to the housing of the connector 20, and attaches the conductive tape 44 thereto. Here, the conductive tape 44 may use the same material or product as the EMI tape 43 . Since the housing of the connector 20 is electrically connected to the shield 38 by the conductive tape 44, a shield against noise interference generated from the connector portion can be formed.

Subsequently, as shown in FIG. 12 , outer peripheral surfaces of the second shield 38 and the conductive tape 44 may be taped with an insulating masking tape 45 . Since the outer diameter of the first region may be reduced compared to the second region due to elements removed in the process of cable processing for connector connection, the insulating masking tape 45 is taped to form an insulating jacket 39 When re-installing in the first area, it can be the same outer diameter as the second area. That is, the masking tape 45 may be taped to have the same outer diameter as the inner diameter of the insulating jacket 39 in the second region.

13 is a diagram for explaining a result of testing the performance of a camera link cable according to an embodiment of the present invention.

The test shown in FIG. 13 shows the result of data transmission at a speed of 65Mhz using a total of 14M camera link cables. Four data result images were compared while changing the target of the connector and changing the number of taps at the corresponding speed.

The left side of FIG. 13 is the result of not applying the camera link cable of the present invention, and the right side is the result of applying the camera link cable of the present invention.

As shown in FIG. 13, when the camera link cable of the present invention is not applied, defects (white points) occur in the data transmission result, but when the camera link cable of the present invention is applied, the results obtained under the same conditions are reduced in defects or Defects were removed and normal results were obtained. This confirms that the data loss is remarkably reduced in the data transmission process using the cable through sufficiently low impedance and good noise interference avoidance when connecting the cable and the connector.

As described above, the camera link cable according to various embodiments of the present invention can reduce data loss by securing appropriate noise shielding and preventing an impedance rise in the process of connecting a cable to a connector. Through this, it is possible to secure a relatively longer length of the camera link cable for data transmission, and it is possible to guarantee excellent data transmission performance even at higher speed data transmission.

Although the above has been shown and described in relation to specific embodiments of the present invention, it is understood that the present invention can be variously improved and changed without departing from the technical spirit of the present invention provided by the claims below. It will be obvious to those skilled in the art.

10: camera link cable 20: connector
31: conductor line 32: insulation sheath
33: inner shield 34: first filler
35: wrapping tape 36: second filler
37: first shield 38: second shield
39: insulating jacket 41: metal foil
42: insulation tape 43: EMI tape
44: conductive tape 45: masking tape

Claims (6)

delete A camera link cable having a first region having one end connected to a connector and a second region extending from the other end of the first region,
The first region,
a plurality of signal lines including a conductor line and an insulating coating covering an outer circumferential surface of the conductor line;
a metal foil taped to surround the entirety of the plurality of signal lines;
Insulation tape taped to surround the outer circumferential surface of the metal foil;
an insulating wrapping tape surrounding an outer circumferential surface of the insulating tape;
a first shield covering an outer circumferential surface of the insulating wrapping tape and having conductivity;
an EMI tape covering an outer circumferential surface of the first shield and having conductivity;
a second shield covering an outer circumferential surface of the EMI tape and having conductivity;
a conductive tape extending from a partial region of the second shield to the connector housing; and
Including an insulating masking tape surrounding the outer circumferential surface of the second shield and the conductive tape,
The second region,
a plurality of inner shields made of metal surrounding each pair of the plurality of signal lines;
a first filler filled between the inner shield and the signal line;
the insulating wrapping tape covering the entirety of the plurality of inner shields;
a second filler filled between the plurality of inner shields and the wrapping tape;
the first shield covering an outer circumferential surface of the wrapping tape and having conductivity;
the second shield covering an outer circumferential surface of the first shield and having conductivity; and
An insulating jacket surrounding the outer circumferential surface of the second shield,
Characterized in that the insulating masking tape is taped to have an outer diameter equal to the length of the inner diameter of the insulating jacket
Camera link cable. delete delete A plurality of signal lines including a conductor line and an insulating coating covering an outer circumferential surface of the conductor line, a plurality of inner shields made of metal surrounding each pair of the plurality of signal lines, and filling between the inner shield and the signal line. A first filler, an insulating wrapping tape covering the entirety of the plurality of inner shields, a second filler filled between the plurality of inner shields and the wrapping tape, and a first shield covering an outer circumferential surface of the wrapping tape and having conductivity; preparing a camera link cable including a second shield covering an outer circumferential surface of the first shield and having conductivity, and an insulating jacket covering the outer circumferential surface of the second shield;
exposing internal structures of the insulating jacket, the second shield, the first shield, and the wrapping tape by cutting or untaping portions of the wrapping tape, and removing the second filler;
removing the inner shield and the first pillar;
bonding each of the exposed signal lines to pins of a connector;
taping a metal foil on the exposed portion of the signal line;
Taping an insulating tape on an outer circumferential surface of the metal foil;
taping the wrapping tape to the outer circumferential surface of the insulating tape, and installing a first shield on the outer circumferential surface of the taped wrapping tape;
taping a conductive EMI tape to surround a region of the outer circumferential surface of the first shield from which the inner shield was removed;
installing the second shield to surround an outer circumferential surface of the EMI tape;
attaching a conductive tape extending from a partial area of the second shield to the housing of the connector; and
taping outer circumferential surfaces of the second shield and the conductive tape with insulating masking tape;
including,
The step of taping with the insulating masking tape is characterized in that the insulating masking tape is taped to have an outer diameter equal to the length of the inner diameter of the insulating jacket before the incision.
Manufacturing method of camera link cable. delete

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