CN113205918B - Communication transmission cable - Google Patents
Communication transmission cable Download PDFInfo
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- CN113205918B CN113205918B CN202110484202.8A CN202110484202A CN113205918B CN 113205918 B CN113205918 B CN 113205918B CN 202110484202 A CN202110484202 A CN 202110484202A CN 113205918 B CN113205918 B CN 113205918B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/02—Cables with twisted pairs or quads
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/02—Cables with twisted pairs or quads
- H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
Abstract
The application discloses a communication transmission cable, which reduces the communication error rate. The transmission cable comprises n pairs of communication twisted pairs, m pairs of power twisted pairs and 2n pairs of self-defined twisted pairs, wherein n is more than or equal to m and more than or equal to 1. The 3n + m twisted-pair cables are divided into m groups, and the i group comprises 1 pair of power twisted-pair cables and x i To communication twisted pair and 2x i Self-defining the twisted pair; i =1, 2, \8230, m, x i ≥1，x 1 +x 2 +…+x m = n. Within group i: the power twisted pair is used for being connected to the s-th receiving end along with the s-th pair communication twisted pair, a first wire in the s-th pair self-defined twisted pair is connected with a first wire in the s-th pair communication twisted pair in parallel, a second wire is connected with a VCC wire in the power twisted pair in parallel, and the xth wire i The first wire of the + s pair of self-defined twisted-pair wires is connected with the second wire of the s pair of communication twisted-pair wires in parallel, and the second wire is connected with the GND wire of the power supply twisted-pair wire in parallel; s =1, 2, \ 8230;, x i 。
Description
Technical Field
The invention relates to the technical field of communication, in particular to a communication transmission cable.
Background
With the rapid development of power electronic technology, power electronic devices are moving toward high frequency, large capacity and small volume, their electromagnetic environment is becoming worse and electromagnetic interference is becoming more serious, and communication between power electronic devices often generates error codes due to electromagnetic interference.
The existing communication modes (such as RS-485, CAN and the like) adopt a balanced driving mode and a differential receiving mode to improve the anti-electromagnetic interference capability, and adopt a communication twisted pair as a transmission medium. In some cases, however, it is desirable that the power twisted pair (or ground) be connected to the receiving end along with the communication twisted pair. For example, as shown in FIGS. 1 to 2: in fig. 1, a pair of communication twisted pairs is used to transmit a pair of differential signals a and B carrying communication data, and a pair of power twisted pairs is used to transmit power positive and negative signals VCC and GND; in fig. 2, a pair of communication twisted pairs is used to transmit a pair of differential signals a and B carrying communication data, and a GND line, i.e. ground line, is used to connect to the receiving end.
In the case where a power twisted pair (or a ground) is connected to a receiving end along with a communication twisted pair, under electromagnetic interference, a situation may occur where the amplitude of the voltage to ground of two signal lines (for example, an a signal line and a B signal line in fig. 1 or fig. 2) in the communication twisted pair exceeds a standard range (the standard range is generally-7V to + 12V), which still causes communication errors.
Disclosure of Invention
Accordingly, the present invention provides a communication transmission cable to reduce the error rate of communication.
A communication transmission cable comprises a pair of twisted-pair cables, 3n + m, which are respectively: n pairs of communication twisted-pair lines, m pairs of power twisted-pair lines and 2n pairs of self-defined twisted-pair lines, wherein n is more than or equal to m and is more than or equal to 1;
the 3n + m twisted pair is divided into m groups, and the ith group comprises 1 twisted pair of power supply and x i To communication twisted pair and 2x i To self-defining twisted pair; i =1, 2, \ 8230;, m, x i ≥1，x 1 +x 2 +…+x m ＝n；
Within group i: the power twisted pair is used for being connected to an s-th receiving end along with an s-th pair communication twisted pair, a first wire in the s-th pair self-defined twisted pair is connected with a first wire in the s-th pair communication twisted pair in parallel, a second wire in the s-th pair self-defined twisted pair is connected with a GND wire in the power twisted pair in parallel, and an xth wire i The first line of the + s pair of self-defined twisted-pair lines is connected in parallel with VCC line of the power supply twisted-pair line, the xth line i The second wire in the + s pair of self-defined twisted-pair wires is connected with the second wire in the s pair of communication twisted-pair wires in parallel; s =1, 2, \8230, x i 。
Optionally, for the previous communication transmission cable, in the ith group: two wires in the same twisted pair are equal in length; when the voltage of a first wire in the s-th pair of communication twisted-pair lines needs to be reduced, setting the s-th pair of self-defined twisted-pair lines to be not equal to the s-th pair of communication twisted-pair lines, or setting the s-th pair of self-defined twisted-pair lines to be equal to the s-th pair of communication twisted-pair lines; setting the xth line to ground voltage when it is required to reduce the voltage of the second line in the s-th twisted pair communication line i The + s pair self-defined twisted pair is not equal to the s pair communication twisted pair, otherwise, the x-th pair communication twisted pair is set i Is self-defined by + s pairsThe twisted pair is equal in length to the s-th pair of communication twisted pairs.
A communication transmission cable comprises a pair of twisted-pair cables, 3n + m, which are respectively: n pairs of communication twisted-pair lines, m pairs of power twisted-pair lines and 2n pairs of self-defined twisted-pair lines, wherein n is more than or equal to m and is more than or equal to 1;
the 3n + m twisted-pair cable is divided into m groups, and the i group comprises 1 pair of power twisted-pair cables and x i Paired communication twisted pair and 2x i Self-defining the twisted pair; i =1, 2, \ 8230;, m, x i ≥1，x 1 +x 2 +…+x m ＝n；
Within group i: the power twisted pair is used for being connected to an s-th receiving end together with an s-th pair communication twisted pair, a first wire in the s-th pair customized twisted pair is connected with a first wire in the s-th pair communication twisted pair in parallel, and a second wire and an xth wire in the s-th pair customized twisted pair are connected with the xth receiving end in parallel i The first wire in the + s pair self-defined twisted pair and the GND wire in the power twisted pair are connected in parallel, and the second wire in the s-th pair communication twisted pair and the xth wire i The second line of the + s pair of self-defined twisted-pair lines is connected in parallel; s =1, 2, \ 8230;, x i 。
Optionally, for the previous communication transmission cable, in the ith group: two wires in the same twisted pair are equal in length; when the voltage of a first wire in the s-th twisted pair communication wire pair needs to be reduced, setting the s-th pair custom twisted pair to be unequal to the s-th pair communication twisted pair, otherwise, setting the s-th pair custom twisted pair to be equal to the s-th pair communication twisted pair; setting the xth line to ground voltage when it is required to reduce the voltage of the second line in the s-th twisted pair communication line i The + s pair self-defined twisted pair is not equal to the s pair communication twisted pair, otherwise, the x-th pair communication twisted pair is set i The + s pair of custom twisted-pair cables has the same length as the s-th pair of communication twisted-pair cables.
A communication transmission cable comprises a pair of twisted-pair cables, 3n + m, which are respectively: n pairs of communication twisted-pair lines, m pairs of power twisted-pair lines and 2n pairs of self-defined twisted-pair lines, wherein n is more than or equal to m and is more than or equal to 1;
the 3n + m twisted-pair cable is divided into m groups, and the i group comprises 1 pair of power twisted-pair cables and x i Paired communication twisted pair and 2x i To self-defining twisted pair; i =1, 2, \ 8230;, m, x i ≥1，x 1 +x 2 +…+x m ＝n；
Within group i: the power twisted pair is used for being connected to an s-th receiving end together with an s-th pair communication twisted pair, a first wire in the s-th pair customized twisted pair is connected with a first wire in the s-th pair communication twisted pair in parallel, and a second wire and an xth wire in the s-th pair customized twisted pair are connected with the xth receiving end in parallel i The first wire of the + s pair of self-defined twisted-pair wires is connected with the VCC wire of the power supply twisted-pair wire in parallel, and the xth wire i The second wire in the + s pair of self-defined twisted pairs is connected with the second wire in the s pair of communication twisted pairs in parallel; s =1, 2, \8230, x i 。
Optionally, for the previous communication transmission cable, in the ith group: two wires in the same twisted pair are equal in length; when the voltage of a first wire in the s-th pair of communication twisted-pair lines needs to be reduced, setting the s-th pair of self-defined twisted-pair lines to be not equal to the s-th pair of communication twisted-pair lines, or setting the s-th pair of self-defined twisted-pair lines to be equal to the s-th pair of communication twisted-pair lines; setting the xth line to ground voltage when it is required to reduce the voltage of the second line in the s-th twisted pair communication line i The + s pair self-defined twisted pair is not equal to the s pair communication twisted pair, otherwise, the x-th pair communication twisted pair is set i The + s pair of self-defined twisted-pair lines has the same length as the s-th pair of communication twisted-pair lines.
A communication transmission cable comprising 3n twisted pairs and m GND lines, the 3n twisted pairs being: n pairs of communication twisted-pair lines and 2n pairs of self-defined twisted-pair lines, wherein n is more than or equal to m and is more than or equal to 1;
the 3n twisted pairs and the m GND lines are divided into m groups, and the i group comprises 1 GND line and x i To communication twisted pair and 2x i To self-defining twisted pair; i =1, 2, \8230, m, x i ≥1，x 1 +x 2 +…+x m ＝n；
Within group i: the GND line is used for being connected to an s-th receiving end together with an s-th twisted communication pair, a first line of the s-th twisted communication pair is connected with a first line of the s-th twisted communication pair in parallel, and a second line of the s-th twisted communication pair is connected with an xth line i The second wire of the + s pair of self-defined twisted pair is connected in parallel, the second wire of the s pair of self-defined twisted pair, the x i The first wire of the + s pair of self-defined twisted-pair wires and the GND wire are combinedConnecting; s =1, 2, \8230, x i 。
Optionally, for the previous communication transmission cable, within the ith group: two wires in the same twisted pair are equal in length; when the voltage of a first wire in the s-th twisted pair communication wire pair needs to be reduced, setting the s-th pair custom twisted pair to be unequal to the s-th pair communication twisted pair, otherwise, setting the s-th pair custom twisted pair to be equal to the s-th pair communication twisted pair; setting the xth line to ground voltage when it is required to reduce the voltage of the second line in the s-th twisted pair communication line i The + s pair self-defined twisted pair is not equal to the s pair communication twisted pair, otherwise, the x-th pair communication twisted pair is set i The + s pair of self-defined twisted-pair lines has the same length as the s-th pair of communication twisted-pair lines.
A communications transmission cable comprising: all wires included in any of the various communications transmission cables described above.
Optionally, the communication transmission cable adopts an RS-485 or CAN communication mode.
According to the technical scheme, the twisted pair is added to twist the signal wire and the power wire on the basis of the original communication twisted pair and the power supply twisted pair (or the ground wire) at the receiving end, and the problem that the amplitude of the ground voltage of the signal wire exceeds the standard range due to electromagnetic interference is solved by utilizing the characteristic that the twisted pair can inhibit the two twisted wires from being subjected to external electromagnetic interference, so that the anti-electromagnetic interference capability is improved, and the error rate of communication is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention 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 invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of an internal structure of a communication transmission cable disclosed in the prior art;
fig. 2 is a schematic view of an internal structure of another communication transmission cable disclosed in the prior art;
fig. 3 is a schematic view of an internal structure of a communication transmission cable according to embodiment 1 of the present invention;
fig. 4 is a schematic view of an internal structure of another communication transmission cable disclosed in embodiment 1 of the present invention;
fig. 5 is a schematic view of an internal structure of another communication transmission cable disclosed in embodiment 1 of the present invention;
fig. 6 is a schematic view of an internal structure of a communication transmission cable according to embodiment 2 of the present invention;
fig. 7 is a schematic view of an internal structure of a communication transmission cable according to embodiment 3 of the present invention;
fig. 8 is a schematic view of an internal structure of a communication transmission cable according to embodiment 4 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Embodiment 1 of the present invention:
embodiment 1 of the invention discloses a communication transmission cable, which comprises a pair of twisted-pair cables, namely, 3n + m twisted-pair cables, wherein the twisted-pair cables are respectively as follows: n pairs of communication twisted-pair lines, m pairs of power twisted-pair lines and 2n pairs of self-defined twisted-pair lines, wherein n is more than or equal to m and is more than or equal to 1. Fig. 3, fig. 4 and fig. 5 are three examples of embodiment 1 of the present invention, respectively, where fig. 3 is an example with n = m =1, fig. 4 is an example with n = m =2, and fig. 5 is an example with n =2 and m = 1.
In embodiment 1 of the present invention, the 3n + m twisted pairs are divided into m groups, where the i group includes 1 twisted pair of power supply and x i Paired communication twisted pair and 2x i To self-defining twisted pair; i =1, 2, \8230, m, x i ≥1，x 1 +x 2 +…+x m ＝n；
Within group i: the power twisted pair is used for being connected to the s receiving end together with the s pair communication twisted pairDefining that a first wire in the twisted pair is connected in parallel with a first wire in the s-th twisted communication pair (namely the first wire in the s-th twisted communication pair is connected with the first wire in the s-th twisted communication pair end to end), the second wire in the s-th twisted communication pair is connected in parallel with a GND wire in the power twisted pair, and the xth wire is connected with the GND wire in the power twisted pair i The first line of the + s pair of self-defined twisted-pair lines is connected with VCC line of the power supply twisted-pair line in parallel, the xth line i The second wire in the + s pair of self-defined twisted-pair wires is connected with the second wire in the s pair of communication twisted-pair wires in parallel; s =1, 2, \8230, x i 。
The embodiment 1 of the invention is suitable for the situation that a pair of power twisted pairs is connected to a receiving end along with a pair of communication twisted pairs, different receiving ends use independent communication twisted pairs, and different receiving ends can use independent power twisted pairs and can also share the same pair of power twisted pairs. For each receiving end in the situation, the technical solution of embodiment 1 of the present invention is that, on the basis of the communication twisted pair and the power twisted pair originally used by the receiving end, a twisted pair is added to twist a signal line and a power line (both the two lines in the communication twisted pair belong to the signal line and both the two lines in the power twisted pair belong to the power line), and the characteristic that the twisted pair can inhibit the two lines twisted with each other from being subjected to external electromagnetic interference is utilized to overcome the problem that the amplitude of the ground voltage of the signal line exceeds the standard range due to the electromagnetic interference, so as to improve the capability of resisting the electromagnetic interference and reduce the error rate of communication. Then, the wire harness connected to at least one receiving end is bundled or packaged into a cable by other means, so as to obtain the communication transmission cable disclosed in embodiment 1 of the present invention. It can be said that the communication transmission cable disclosed in embodiment 1 of the present invention is obtained by adding 2n pairs of customized twisted pairs to the original n pairs of communication twisted pairs and m pairs of power twisted pairs of the conventional communication transmission cable.
The operation principle of embodiment 1 of the present invention will be described in detail below with reference to fig. 3 as an example.
The communications transmission cable shown in fig. 3 comprises only a bundle of wires connected to one receiving end, for a total of 4 twisted pairs, wherein: the twisted pair 1 is an original pair of communication twisted pairs in a communication transmission cable and is used for transmitting a pair of differential signals A and B carrying communication data; the twisted pair 2 is an original pair of power supply twisted pairs in the communication transmission cable and is used for transmitting power supply positive and negative electrode signals VCC and GND; twisted pair 3 and twisted pair 4 are 2 additional custom twisted pairs in the communications transmission cable.
Two wires of the twisted pair 3 are respectively connected in parallel with the a signal wire of the twisted pair 1 and the GND wire of the twisted pair 2, so that the twisted pair 3 is equivalent to twisting the a signal wire and the GND wire. Two lines of the twisted pair 4 are respectively connected in parallel with the B signal line of the twisted pair 1 and the VCC line of the twisted pair 2, so that the twisted pair 4 is equivalent to twisting the B signal line and the VCC line. Because the twisted pair has the characteristic of inhibiting the two twisted wires from being subjected to external electromagnetic interference, the problem that the voltage amplitude of the A signal wire pair GND exceeds the standard range caused by the electromagnetic interference can be solved through the twisted pair 3, and the problem that the voltage amplitude of the B signal wire pair VCC exceeds the standard range caused by the electromagnetic interference can be solved through the twisted pair 4; and the power supply twisted pair inhibits the voltage amplitude of the VCC line and the GND line from exceeding the standard range caused by electromagnetic interference, so that the voltage amplitude of the B signal line to the GND is not beyond the standard range by synthesizing the effects of the twisted pair 4 and the power supply twisted pair. Therefore, the pair of differential signals A and B in the twisted pair 1 realize that the voltage amplitude of the GND does not exceed the standard range by virtue of the twisted pair 3 and the twisted pair 4, thereby improving the anti-electromagnetic interference capability and reducing the error rate of communication.
The communications transmission cable shown in fig. 4 comprises a bundle of wires connected to two receiving ends, 8 pairs of twisted wires, twisted wires 1-4 making up the bundle connected to a first receiving end, and twisted wires 5-8 making up the bundle connected to a second receiving end, wherein: the twisted pair 1 and the twisted pair 6 are two original communication twisted pairs in a communication transmission cable, the twisted pair 1 is used for transmitting a pair of differential signals A1 and B1 for bearing communication data, and the twisted pair 2 is used for transmitting a pair of differential signals A2 and B2 for bearing communication data; the twisted pair 2 and the twisted pair 8 are two original power supply twisted pairs in the communication transmission cable, the twisted pair 2 is used for transmitting power supply positive and negative electrode signals VCC1 and GND1, and the twisted pair 8 is used for transmitting power supply positive and negative electrode signals VCC2 and GND2; twisted pair 3, twisted pair 4, twisted pair 5, and twisted pair 7 are added 4 pairs of custom twisted pairs in the communication transmission cable. In a wire harness connected to a first receiving end, a pair of differential signals A1 and B1 in a twisted pair 1 realize that the voltage amplitude of a pair GND1 does not exceed a standard range by virtue of a twisted pair 3 and a twisted pair 4, so that the anti-electromagnetic interference capability is improved, the error rate of communication with the first receiving end is reduced, the principle analysis is the same as that in FIG. 3, and the details are not repeated; in the wire harness connected to the second receiving end, the voltage amplitude of the pair of differential signals A2 and B2 in the twisted pair 6 to the GND2 does not exceed the standard range by means of the twisted pair 5 and the twisted pair 7, so that the anti-electromagnetic interference capability is improved, the error rate of communication with the second receiving end is reduced, the principle analysis is the same as that in fig. 3, and details are not repeated here.
Fig. 5 shows a communications transmission cable comprising only bundles connected to one receiving end, for a total of 7 twisted pairs, wherein: the twisted pair 1 and the twisted pair 5 are two original communication twisted pairs in the communication transmission cable, the twisted pair 1 is used for transmitting a pair of differential signals A1 and B1 carrying communication data, and the twisted pair 5 is used for transmitting a pair of differential signals A2 and B2 carrying communication data; the twisted pair 2 is an original pair of power supply twisted pairs in the communication transmission cable and is used for transmitting power supply positive and negative electrode signals VCC and GND; twisted pair 3, twisted pair 4, twisted pair 6, twisted pair 7 are the added 4 pairs of custom twisted pairs in the communications transmission cable. The pair of differential signals A1 and B1 on the twisted pair 1 realizes that the voltage amplitude to GND does not exceed the standard range by virtue of the twisted pair 3 and the twisted pair 4, and the pair of differential signals A2 and B2 on the twisted pair 5 realizes that the voltage amplitude to GND does not exceed the standard range by virtue of the twisted pair 6 and the twisted pair 7, and the principle analysis is the same as that in fig. 3, and details are not repeated here.
In embodiment 2 of the present invention, the pair of twisted pair lines is divided into 3n + mM groups, i group containing 1 pair of power twisted pairs, x i Paired communication twisted pair and 2x i Self-defining the twisted pair; i =1, 2, \ 8230;, m, x i ≥1，x 1 +x 2 +…+x m ＝n；
Within group i: the power twisted pair is used for being connected to an s-th receiving end along with an s-th pair communication twisted pair, a first wire in the s-th pair self-defined twisted pair is connected with a first wire in the s-th pair communication twisted pair in parallel, and a second wire and an xth wire in the s-th pair self-defined twisted pair i The first wire of the + s pair self-defined twisted pair and the GND wire of the power supply twisted pair are connected in parallel, and the second wire of the s pair communication twisted pair and the xth wire i The second line of the + s pair of self-defined twisted-pair lines is connected in parallel; s =1, 2, \8230, x i 。
Fig. 6 shows a communications transmission cable comprising only bundles connected to one receiving end, 4 twisted pairs in total, wherein: the twisted pair 1 is an original pair of communication twisted pairs in a communication transmission cable and is used for transmitting a pair of differential signals A and B for bearing communication data; the twisted pair 2 is an original pair of power supply twisted pairs in the communication transmission cable and is used for transmitting power supply positive and negative electrode signals VCC and GND; twisted pair 3 and twisted pair 4 are 2 additional custom twisted pairs in the communications transmission cable.
Inventive example 2 differs from inventive example 1 only in that: in embodiment 1 of the present invention, two wires in a pair of communication twisted pairs and two wires in a pair of power twisted pairs are twisted one to one by adding twisted pair phase transformation, while in embodiment 2 of the present invention, two wires in a pair of communication twisted pairs are twisted with a GND wire in a power twisted pair by adding twisted pair phase transformation, but the two solutions are the same in principle, and are not described herein again.
Embodiment 3 of the present invention:
embodiment 3 of the present invention discloses another communication transmission cable, which comprises a pair of twisted-pair cables, 3n + m, respectively: n pairs of communication twisted-pair lines, m pairs of power twisted-pair lines and 2n pairs of self-defined twisted-pair lines, wherein n is more than or equal to m and is more than or equal to 1. Fig. 7 is an example of embodiment 3 of the present invention, and specifically, fig. 7 is an example in which n = m = 1.
In embodiment 3 of the present invention, the 3n + m twisted pairs are divided into m groups, where the i group includes 1 twisted pair of power source and x i Paired communication twisted pair and 2x i To self-defining twisted pair; i =1, 2, \8230, m, x i ≥1，x 1 +x 2 +…+x m ＝n；
Within group i: the power twisted pair is used for being connected to an s-th receiving end along with an s-th pair communication twisted pair, a first wire in the s-th pair self-defined twisted pair is connected with a first wire in the s-th pair communication twisted pair in parallel, and a second wire and an xth wire in the s-th pair self-defined twisted pair i The first wire of the + s pair of self-defined twisted-pair wires is connected with the VCC wire of the power supply twisted-pair wire in parallel, and the xth wire i The second wire in the + s pair of self-defined twisted pairs is connected with the second wire in the s pair of communication twisted pairs in parallel; s =1, 2, \ 8230;, x i 。
Fig. 7 shows a communications transmission cable comprising only bundles connected to one receiving end, 4 twisted pairs in total, wherein: the twisted pair 1 is an original pair of communication twisted pairs in a communication transmission cable and is used for transmitting a pair of differential signals A and B for bearing communication data; the twisted pair 2 is an original pair of power supply twisted pairs in the communication transmission cable and is used for transmitting power supply positive and negative electrode signals VCC and GND; twisted pair 3 and twisted pair 4 are added 2 pairs of custom twisted pairs in the communications transmission cable.
Inventive example 3 differs from inventive example 1 only in that: in embodiment 1 of the present invention, two wires in a pair of communication twisted pairs and two wires in a pair of power supply twisted pairs are twisted one to one by adding twisted pair phase change, while in embodiment 3 of the present invention, two wires in a pair of communication twisted pairs are twisted with a VCC wire in a power supply twisted pair by adding twisted pair phase change, but the two solutions have the same principle, and are not described herein again.
Embodiment 4 of the present invention:
the embodiment 4 of the invention discloses another communication transmission cable, which comprises 3n twisted pairs and m GND lines, wherein the 3n twisted pairs are respectively as follows: n pairs of communication twisted-pair lines and 2n pairs of self-defined twisted-pair lines, wherein n is more than or equal to m and more than or equal to 1. Fig. 8 is an example of embodiment 4 of the present invention, and specifically, fig. 8 is an example where n = m = 1.
The 3n twisted pairs and the m GND lines are divided into m groups, wherein the ith group comprises 1 GND line and x i Paired communication twisted pair and 2x i Self-defining the twisted pair; i =1, 2, \ 8230;, m, x i ≥1，x 1 +x 2 +…+x m ＝n；
Within group i: the GND line is used for being connected to an s-th receiving end together with an s-th twisted communication pair, a first line of the s-th twisted communication pair is connected with a first line of the s-th twisted communication pair in parallel, and a second line of the s-th twisted communication pair is connected with an xth line i The second wire of the + s pair of self-defined twisted pair is connected in parallel, the second wire of the s pair of self-defined twisted pair, the x i The first wire of the + s pair of self-defined twisted-pair wires is connected with the GND wire in parallel; s =1, 2, \8230, x i 。
Fig. 8 shows a communication transmission cable comprising only a bundle of wires connected to one receiving end, 3 twisted pairs and 1 GND line in total, wherein: the twisted pair 1 is an original pair of communication twisted pairs in a communication transmission cable and is used for transmitting a pair of differential signals A and B carrying communication data; the GND line is an original power line in the communication transmission cable; twisted pair 2 and twisted pair 3 are 2 additional custom twisted pairs in the communications transmission cable.
Inventive example 4 differs from inventive example 1 only in that: in embodiment 1 of the present invention, two wires in a pair of communication twisted pairs and two wires in a pair of power supply twisted pairs are twisted one to one by adding twisted pair phase transformation, while in embodiment 3 of the present invention, only a GND wire does not have a VCC wire, and by adding twisted pair phase transformation, two wires in a pair of communication twisted pairs are twisted with the GND wire, but the principles of solving the technical problems in the two embodiments are the same, and are not described herein again.
Embodiment 5 of the present invention:
embodiment 5 of the present invention discloses another communication transmission cable, including: all the wires included in the communication transmission cable described in embodiment 1 of the present invention and all the wires included in the communication transmission cable described in embodiment 2 of the present invention.
Alternatively, the communication transmission cable includes: all the wires included in the communication transmission cable described in embodiment 1 of the present invention and all the wires included in the communication transmission cable described in embodiment 3 of the present invention.
Alternatively, the communication transmission cable comprises: all the wires included in the communication transmission cable described in embodiment 2 of the present invention and all the wires included in the communication transmission cable described in embodiment 3 of the present invention.
Alternatively, the communication transmission cable comprises: all the wires included in the communication transmission cable described in embodiment 1 of the present invention, all the wires included in the communication transmission cable described in embodiment 2 of the present invention, and all the wires included in the communication transmission cable described in embodiment 3 of the present invention.
It can be said that, for any plurality of independent communication transmission cables in embodiments 1 to 4 of the present invention, all the wires included in the communication transmission cables are combined together and packaged into one cable, which is the communication transmission cable disclosed in embodiment 5 of the present invention. The arbitrary plurality of independent communication transmission cables are not influenced mutually in the line number setting.
In summary, in any of the embodiments disclosed above, the twisted pair is added to twist the signal line and the power line, and the characteristic that the twisted pair can inhibit the two twisted lines from being subjected to external electromagnetic interference is utilized to overcome the problem that the voltage amplitude of the signal line to the ground exceeds the standard range due to the electromagnetic interference, so as to improve the anti-electromagnetic interference capability and reduce the error rate of communication.
In addition, in any of the embodiments disclosed above, each original signal line is instead formed by connecting 2 signal lines in parallel (for example, in fig. 3, the routing of the a signal is substantially formed by connecting one line in twisted pair 1 and one line in twisted pair 3 in parallel), when the communication baud rate is high and the transmission cable is long, so that transmission line theory analysis must be used, the parallel connection of two lines with different lengths reduces the voltage amplitude of the signal line to the ground compared with the source end, and this feature can be used to suppress the increase of the voltage amplitude of the signal line to the ground caused by reflection; if it is not desirable to reduce the amplitude of the signal voltage, two signal lines of equal length may be used in parallel. That is, within the ith group: is composed ofTwo wires in a pair of twisted pairs are equal in length; when the voltage of a first wire in the s-th pair of communication twisted-pair lines needs to be reduced, setting the s-th pair of self-defined twisted-pair lines to be not equal to the s-th pair of communication twisted-pair lines, or setting the s-th pair of self-defined twisted-pair lines to be equal to the s-th pair of communication twisted-pair lines; setting the xth line to ground when it is desired to reduce the voltage to ground of the second of the s-th pair of communication twisted pairs i The + s pair self-defined twisted pair is not equal to the s pair communication twisted pair, otherwise, the x-th pair communication twisted pair is set i The + s pair of self-defined twisted-pair lines has the same length as the s-th pair of communication twisted-pair lines.
Furthermore, in any of the above-disclosed embodiments, each of the original signal lines is changed to be formed by connecting 2 signal lines in parallel, each of the original power lines is also changed to be formed by connecting 2 power lines in parallel, and the two parallel lines are mutually standby, so that the reliability is improved.
The communication transmission cable according to any of the embodiments disclosed above may be in an RS-485 or CAN communication mode, but is not limited thereto.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The terms "first," "second," "a," "B," and the like in the description and claims of the present invention and in the foregoing description and drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the embodiments. Thus, the present embodiments are not intended to be limited to the embodiments shown herein but are to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A communication transmission cable, comprising a pair of twisted pairs, 3n + m, respectively: n pairs of communication twisted-pair lines, m pairs of power twisted-pair lines and 2n pairs of self-defined twisted-pair lines, wherein n is more than or equal to m and is more than or equal to 1;
the 3n + m twisted-pair cable is divided into m groups, and the i group comprises 1 pair of power twisted-pair cables and x i Paired communication twisted pair and 2x i Self-defining the twisted pair; i =1, 2, \ 8230;, m, x i ≥1，x 1 +x 2 +…+x m ＝n；
Within group i: the power supply twisted pair is used for being connected to an s-th receiving end together with an s-th pair communication twisted pair, a first wire in the s-th pair customized twisted pair is connected with a first wire in the s-th pair communication twisted pair in parallel, a second wire in the s-th pair customized twisted pair is connected with a GND wire in the power supply twisted pair in parallel, and an xth wire i The first line of the + s pair of self-defined twisted-pair lines is connected in parallel with VCC line of the power supply twisted-pair line, the xth line i The second wire in the + s pair of self-defined twisted pairs is connected with the second wire in the s pair of communication twisted pairs in parallel; s =1, 2, \8230, x i 。
2. The communications transmission cable of claim 1, wherein within group i: two wires in the same twisted pair are equal in length; when the voltage of a first wire in the s-th pair of communication twisted-pair lines needs to be reduced, setting the s-th pair of self-defined twisted-pair lines to be not equal to the s-th pair of communication twisted-pair lines, or setting the s-th pair of self-defined twisted-pair lines to be equal to the s-th pair of communication twisted-pair lines; setting the xth line to ground voltage when it is required to reduce the voltage of the second line in the s-th twisted pair communication line i + s pair self-defining twisted-pair line and s-th pair communication twisted-pair lineUnequal length, otherwise, the x-th is set i The + s pair of custom twisted-pair cables has the same length as the s-th pair of communication twisted-pair cables.
3. A communication transmission cable is characterized by comprising a pair of twisted-pair wires, 3n + m, which are respectively: n pairs of communication twisted-pair lines, m pairs of power twisted-pair lines and 2n pairs of self-defined twisted-pair lines, wherein n is more than or equal to m and is more than or equal to 1;
the 3n + m twisted pair is divided into m groups, and the ith group comprises 1 twisted pair of power supply and x i Paired communication twisted pair and 2x i Self-defining the twisted pair; i =1, 2, \ 8230;, m, x i ≥1，x 1 +x 2 +…+x m ＝n；
Within group i: the power twisted pair is used for being connected to an s-th receiving end together with an s-th pair communication twisted pair, a first wire in the s-th pair customized twisted pair is connected with a first wire in the s-th pair communication twisted pair in parallel, and a second wire and an xth wire in the s-th pair customized twisted pair are connected with the xth receiving end in parallel i The first wire in the + s pair self-defined twisted pair and the GND wire in the power twisted pair are connected in parallel, and the second wire in the s-th pair communication twisted pair and the xth wire i The second line of the + s pair of self-defined twisted-pair lines is connected in parallel; s =1, 2, \ 8230;, x i 。
4. The communications transmission cable of claim 3, wherein within group i: two wires in the same twisted pair are equal in length; when the voltage of a first wire in the s-th twisted pair communication wire pair needs to be reduced, setting the s-th pair custom twisted pair to be unequal to the s-th pair communication twisted pair, otherwise, setting the s-th pair custom twisted pair to be equal to the s-th pair communication twisted pair; setting the xth line to ground when it is desired to reduce the voltage to ground of the second of the s-th pair of communication twisted pairs i The + s pair self-defined twisted pair is not equal to the s pair communication twisted pair, otherwise, the x-th pair communication twisted pair is set i The + s pair of self-defined twisted-pair lines has the same length as the s-th pair of communication twisted-pair lines.
5. A communication transmission cable is characterized by comprising a pair of twisted-pair wires, 3n + m, which are respectively: n pairs of communication twisted-pair lines, m pairs of power twisted-pair lines and 2n pairs of self-defined twisted-pair lines, wherein n is more than or equal to m and is more than or equal to 1;
the 3n + m twisted pair is divided into m groups, and the ith group comprises 1 twisted pair of power supply and x i Paired communication twisted pair and 2x i To self-defining twisted pair; i =1, 2, \8230, m, x i ≥1，x 1 +x 2 +…+x m ＝n；
Within group i: the power twisted pair is used for being connected to an s-th receiving end together with an s-th pair communication twisted pair, a first wire in the s-th pair customized twisted pair is connected with a first wire in the s-th pair communication twisted pair in parallel, and a second wire and an xth wire in the s-th pair customized twisted pair are connected with the xth receiving end in parallel i The first wire of the + s pair of self-defined twisted-pair wires is connected with the VCC wire of the power supply twisted-pair wire in parallel, and the xth wire i The second wire in the + s pair of self-defined twisted pairs is connected with the second wire in the s pair of communication twisted pairs in parallel; s =1, 2, \ 8230;, x i 。
6. The communications transmission cable of claim 5, wherein within group i: two wires in the same twisted pair are equal in length; when the voltage of a first wire in the s-th pair of communication twisted-pair lines needs to be reduced, setting the s-th pair of self-defined twisted-pair lines to be not equal to the s-th pair of communication twisted-pair lines, or setting the s-th pair of self-defined twisted-pair lines to be equal to the s-th pair of communication twisted-pair lines; setting the xth line to ground when it is desired to reduce the voltage to ground of the second of the s-th pair of communication twisted pairs i The + s pair self-defined twisted pair is not equal to the s pair communication twisted pair, otherwise, the x-th pair communication twisted pair is set i The + s pair of self-defined twisted-pair lines has the same length as the s-th pair of communication twisted-pair lines.
7. A communication transmission cable comprising 3n twisted pairs and m GND lines, wherein the 3n twisted pairs are: n pairs of communication twisted-pair lines and 2n pairs of self-defined twisted-pair lines, wherein n is more than or equal to m and more than or equal to 1;
the 3n twisted pairs and the m GND lines are divided into m groups, wherein the ith group comprises 1 GND line and x i Paired communication twisted pair and 2x i Self-defining the twisted pair; i =1, 2, \ 8230;, m, x i ≥1，x 1 +x 2 +…+x m ＝n；
Within group i:the GND line is used for being connected to an s-th receiving end together with an s-th twisted communication pair, a first line in the s-th twisted communication pair is connected with a first line in the s-th twisted communication pair in parallel, and a second line in the s-th twisted communication pair is connected with an xth receiving end i The second wire of the + s pair of self-defined twisted pair is connected in parallel, the second wire of the s pair of self-defined twisted pair, the x i The first wire of the + s pair of self-defined twisted-pair wires is connected with the GND wire in parallel; s =1, 2, \ 8230;, x i 。
8. The communications transmission cable of claim 7, wherein within group i: two wires in the same twisted pair are equal in length; when the voltage of a first wire in the s-th pair of communication twisted-pair lines needs to be reduced, setting the s-th pair of self-defined twisted-pair lines to be not equal to the s-th pair of communication twisted-pair lines, or setting the s-th pair of self-defined twisted-pair lines to be equal to the s-th pair of communication twisted-pair lines; setting the xth line to ground voltage when it is required to reduce the voltage of the second line in the s-th twisted pair communication line i The + s pair self-defined twisted pair is not equal to the s pair communication twisted pair, otherwise, the x-th pair communication twisted pair is set i The + s pair of self-defined twisted-pair lines has the same length as the s-th pair of communication twisted-pair lines.
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