CN216597109U - Active shielding signal cable - Google Patents

Abstract

The utility model relates to a cable conductor technical field discloses a eliminate better active shielding signal cable of potential difference effect, possesses: the cable body (101) is used for transmitting signals, a shielding layer (101 c) and signal wires are arranged in the cable body (101), and a filler layer (corresponding to 101b 1) is wrapped between the signal wires and the shielding layer (101 c); and at least one amplifier (103), the input end of which is coupled with the anode of the signal line, the output end of which is connected with the shielding layer (101 c), and the potential difference between the anode of the signal line and the shielding layer (101 c) is eliminated through the amplifier (103).

Description

Active shielding signal cable

Technical Field

The utility model relates to a cable conductor technical field, more specifically say, relate to an active shielding signal cable.

Background

Cable wires are more commonly used wires for transmitting signals in electronic appliances or instruments. At present, when a two-core coaxial cable with a shielding layer is used for transmitting signals, a dielectric layer used as a filler exists between the anode of a signal line and the shielding layer, so that a potential difference is generated between the anode (the signal line) and the shielding layer, and the potential difference can cause the signals to be degraded in the transmission process.

Therefore, how to avoid the signal degradation caused by the potential difference generated on the line in the transmission process becomes a technical problem that needs to be solved by those skilled in the art.

Disclosure of Invention

The to-be-solved technical problem of the utility model lies in, when having the two-core coaxial cable of shielding layer to the above-mentioned adoption of prior art, because there is the dielectric layer that uses as the filler between the positive pole of signal line and the shielding layer for produce the potential difference between positive pole (signal line) and shielding layer, this potential difference can lead to the signal by the defect of degradation at the in-process of transmission, provides the better active shielding signal cable of elimination potential difference effect.

The utility model provides a technical scheme that its technical problem adopted is: an active shielded signal cable is configured to include:

a cable body for transmitting signals, wherein,

a shielding layer and a signal wire are arranged in the cable body,

a filler layer is wrapped between the signal wire and the shielding layer;

and the input end of the amplifier is coupled with the anode of the signal wire, the output end of the amplifier is connected with the shielding layer, and the potential difference between the anode of the signal wire and the shielding layer is eliminated through the amplifier.

In some embodiments, the filler layer is wrapped around the peripheries of the positive electrode and the negative electrode of the signal line, and is used as an insulating layer between the positive electrode and the negative electrode.

In some embodiments, at least one layer of sheath insulation is provided on the outer layer of the cable body, and

and at least one layer of sheath insulating layer is arranged on the outer layer of the filler layer.

In some embodiments, the signal line further comprises an electrical isolator, an input end of the electrical isolator is coupled to the positive pole of the signal line,

the input end of the amplifier is connected with the output end of the electric isolator.

In some embodiments, the signal line further comprises an auxiliary power supply, the input end of the auxiliary power supply is respectively connected with the positive pole and the negative pole of the signal line,

the output end of the auxiliary power supply is coupled to the power supply end of the amplifier.

Active shielding signal cable in, including being used for transmission signal cable line body and at least one amplifier, wherein, be equipped with shielding layer and signal line in the cable line body, wrap up in between signal line and shielding layer and be equipped with the filler layer, the input of amplifier is coupled in the positive pole of signal line, its output is connected with the shielding layer, through the positive pole of amplifier elimination signal line and the potential difference between the shielding layer. Compared with the prior art, the amplifier with high input impedance and low output impedance is connected into the cable body, the output of the amplified signal is connected to the shielding layer, and the input signal of the amplifier and the signal of the shielding layer are in the same phase, so that potential difference cannot be generated between the anode of the signal line and the shielding layer, the signal cannot be influenced by the dielectric layer in the transmission process, and the signal cannot be degraded in the transmission process.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

fig. 1 is a circuit diagram of an embodiment of an actively shielded signal cable;

fig. 2 is a circuit diagram of another embodiment of an actively shielded signal cable;

fig. 3a is a cross-sectional view of one embodiment of an actively shielded signal cable;

fig. 3b is a schematic structural diagram of an embodiment of a sheath insulation layer according to the present invention;

fig. 3c is a cross-sectional view of an embodiment of the present invention providing a filler layer;

fig. 3d is a schematic structural diagram of an embodiment of the shielding layer according to the present invention.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1-3 d, in the first embodiment of the actively shielded signal cable of the present invention, the actively shielded signal cable 10 includes a cable body 101, an electrical isolator 102, at least one amplifier 103, and an auxiliary power supply 104.

Specifically, the cable body 101 is used for transmitting signals, wherein the cable body 101 includes a plurality of signal lines (corresponding to L and N).

An annular shielding layer 101c and signal lines (corresponding to L and N) arranged along the axial direction of the cable body 101 are provided in the cable body 101. The signal lines (corresponding to L and N) are used for transmitting signals.

Further, a first filler layer 101b1 is wrapped between the signal lines (corresponding to L and N) and the shielding layer 101c, wherein the first filler layer 101b1 wraps the signal lines (corresponding to L and N) so that one signal line (corresponding to L) is isolated from the other signal line (corresponding to N).

Further, the at least one amplifier 103 is a high-speed active amplifier with high input impedance and low output impedance, which has a signal amplification function.

The input end of the amplifier 103 is coupled to the positive electrode (corresponding to + end) of the signal line (corresponding to L), and is configured to obtain an electrical signal of the positive electrode (corresponding to + end) of the signal line (corresponding to L) and amplify the electrical signal.

Further, the output end of the amplifier 103 is connected to the shielding layer 101c, and outputs the amplified signal to the shielding layer 101c, so that the input signal and the signal on the shielding layer 101c are in the same phase, at this time, no potential difference is generated between the positive electrode (corresponding to the positive end) of the signal line (corresponding to the L) and the shielding layer 101c, the potential difference between the positive electrode (signal line) and the shielding layer 101c is "0", and the potential difference between the positive electrode of the signal line (corresponding to the L) and the shielding layer 101c is eliminated through the amplifier 103, so that the signal is not affected by the dielectric layer in the transmission process, and thus the signal is not degraded in the transmission process, and the quality of signal transmission is improved.

In some embodiments, in order to improve the insulation performance between the signal lines (corresponding to L and N), a second filler layer 101b2 may be disposed on the periphery of the signal lines (corresponding to L and N), wherein the second filler layer 101b2 wraps around the periphery of the first filler layer 101b1 and the positive and negative electrodes of the signal lines (corresponding to L and N), and serves as an insulation layer between the positive and negative electrodes.

The first filler layer 101b1 and the second filler layer 101b2 constitute filler layers.

In some embodiments, in order to improve the insulating performance of the cable body 101, at least one layer of sheath insulating layer (corresponding to 101a 1) may be provided on the outer layer of the cable body 101, and at least one layer of sheath insulating layer (corresponding to 101a 2) may be provided on the outer layer of the first filler layer 101b 1.

The sheath insulating layer 101a1 is a first sheath insulating layer, the sheath insulating layer 101a2 is a second sheath insulating layer, the shielding layer 101c is provided between the first sheath insulating layer 101a1 and the second sheath insulating layer 101a2, and the second filler layer 101b2 is provided between the shielding layer 101c and the first sheath insulating layer 101a 1.

That is, the stacking relationship of the cable body 101 from outside to inside is as follows: first sheath insulation layer 101a 1-second filler layer 101b 2-shield layer 101 c-second sheath insulation layer 101a 2-first filler layer 101b 1.

In some embodiments, in order to improve the transmission quality of the sine wave, an electrical isolator 102 may be disposed outside the cable body 101, where the electrical isolator 102 is used to isolate the signal line (corresponding to L) from the input signal of the amplifier 103.

Specifically, the input end of the electrical isolator 102 is coupled to the positive electrode (corresponding to + end) of the signal line (corresponding to L) for receiving the electrical signal output by the signal line (corresponding to L), and the input end of the amplifier 103 is connected to the output end of the electrical isolator 102.

Specifically, the Input end may be a single-phase ac commercial power in addition to a general analog signal or a digital signal, and at this time, the Input end is connected to a phase line of the single-phase ac commercial power, when the ac commercial power is Input, the electrical isolator 102 electrically isolates the amplifier 103 and a dedicated power supply of the amplifier 103, and during transmission of the ac power, the signal is not affected by a dielectric layer of the ac power transmission line.

In some embodiments, in order to ensure that the amplifier 103 can be in an operating state, an auxiliary power supply (or a fully isolated auxiliary power supply) 104 may be disposed outside the cable body 101, wherein an input terminal of the auxiliary power supply (or the fully isolated auxiliary power supply) 104 is respectively connected to an anode and a cathode of the signal line for acquiring an electrical signal, and an output terminal of the auxiliary power supply (or the fully isolated auxiliary power supply) 104 is coupled to a power supply terminal of the amplifier 103 for providing an operating power supply for the amplifier 103.

While the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims (5)

1. An active shielded signal cable, comprising:

a cable body for transmitting signals, wherein,

a shielding layer and a signal wire are arranged in the cable body,

a filler layer is wrapped between the signal wire and the shielding layer;

and the input end of the amplifier is coupled with the anode of the signal wire, the output end of the amplifier is connected with the shielding layer, and the potential difference between the anode of the signal wire and the shielding layer is eliminated through the amplifier.

2. The actively shielded signal cable of claim 1,

the filler layer is wrapped on the peripheries of the anode and the cathode of the signal line and is used for an insulating layer between the anode and the cathode.

3. The actively shielded signal cable of claim 1,

at least one layer of sheath insulating layer is arranged on the outer layer of the cable body, and

and at least one layer of sheath insulating layer is arranged on the outer layer of the filler layer.

4. The actively shielded signal cable of claim 2,

the input end of the electric isolator is coupled with the anode of the signal wire,

the input end of the amplifier is connected with the output end of the electric isolator.

5. The actively shielded signal cable of claim 1 or 2,

the input end of the auxiliary power supply is respectively connected with the anode and the cathode of the signal wire,

the output end of the auxiliary power supply is coupled to the power supply end of the amplifier.

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