Capacitive coupling type Ethernet slip ring module

Abstract

The utility model relates to the technical field of information communication, in particular to a capacitive coupling type Ethernet slip ring module, which comprises a slip ring moving end and a slip ring fixed end, the slip ring moving end comprises a pair of physical connecting ends I, a power supply I, a resistor I, a resistor II and a capacitor I, and the slip ring fixed end comprises a pair of physical connecting ends II, a power supply II, a resistor III, a resistor IV and a capacitor II. One physical connection end I is coupled with one physical connection end II through a plate capacitor; according to the utility model, through the design of the AC coupling capacitor, a traditional electric brush transmission scheme is replaced, and Ethernet communication faults caused by unstable contact resistance are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of information communication, and specifically relates to a capacitive coupling Ethernet slip ring module. Background Art

[0002] Traditional Ethernet signal conductive slip rings use a sliding friction pair consisting of brushes and copper rings for transmission. Although this can solve the problem of twisted wires, the brushes and copper rings will wear out as the product is used, resulting in unstable contact and affecting network signal transmission. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a capacitive coupled Ethernet slip ring module, which uses an AC coupling capacitor design to replace the traditional brush transmission scheme, thereby avoiding Ethernet communication failures caused by unstable contact resistance.

[0004] To achieve the above object, the present invention provides the following technical solution: a capacitive coupling Ethernet slip ring module, characterized in that it consists of a slip ring moving end and a slip ring fixed end,

[0005] The slip ring moving end includes a pair of physical connection terminals 1, a power supply 1, a resistor 1, a resistor 2 and a capacitor 1, wherein the two ends of the resistor 1 and the resistor 2 are connected in series and are respectively connected between the two physical connection terminals 1, the output end of the power supply 1 is connected to the capacitor 1 and then grounded, and the output end of the power supply 1 is connected to the series connection point of the resistor 1 and the resistor 2;

[0006] The fixed end of the slip ring includes a pair of physical connection terminals 2, a power supply 2, a resistor 3, a resistor 4 and a capacitor 2, wherein the two ends of the resistor 3 and the resistor 4 are connected in series and are respectively connected between the two physical connection terminals 2, the output end of the power supply 2 is connected to the capacitor 2 and then grounded, and the output end of the power supply 2 is connected to the series connection point of the resistor 3 and the resistor 4.

[0007] One of the physical connection terminals 1 is coupled to one of the physical connection terminals 2 via a flat plate capacitor;

[0008] Another physical connection terminal 1 is coupled to another physical connection terminal 2 via another flat plate capacitor.

[0009] In some embodiments, the capacitor 1 and the capacitor 2 are both electrolytic capacitors, the positive terminals of the capacitors are connected to the corresponding power supply terminals, and the negative terminals are grounded.

[0010] In some embodiments, the flat plate capacitor includes a plate 1, a dielectric 1, a dielectric 2 and a plate 2 stacked in sequence, the plate 1 and the plate 2 can rotate relative to each other, the plate 1 is connected to one of the physical connection terminals 1 or the physical connection terminal 2, and the plate 2 is connected to the other physical connection terminal 2 or the physical connection terminal 1.

[0011] In some embodiments, the dielectric medium is made of a ceramic material with a high dielectric constant.

[0012] In some embodiments, the high dielectric constant ceramic material includes but is not limited to aluminum oxide, boron nitride, titanium oxide, zirconium oxide or barium titanate.

[0013] In some embodiments, the second medium is made of polytetrafluoroethylene.

[0014] In some embodiments, the surface of the second medium facing the second electrode plate is coated with dimethyl silicone oil.

[0015] In some embodiments, the capacitance of the flat plate capacitor is 1-100 nF.

[0016] Compared with the existing technology, the beneficial effects of the present invention are: a flat plate capacitor with impedance design is used to transmit Ethernet signals from one end of the slip ring to the other end. One end of the flat plate capacitor is fixed, and the other end can rotate 360° unlimitedly with the rotating end of the slip ring. The traditional brush contact type Ethernet signal transmission is replaced by capacitive coupling, and the brush-type slip ring mechanism is improved to capacitive transmission, avoiding the problem of unstable contact.

[0017] Using polytetrafluoroethylene as the medium and lubricant reduces wear and achieves a longer service life.

[0018] Details of one or more embodiments of the present application are presented in the following drawings and descriptions to make other features, purposes and advantages of the present application more concise and easy to understand, and the present application is fully described and understood through the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the power supply principle diagram of the utility model;

[0020] Figure 2 is a schematic diagram of the cross section of a flat plate capacitor;

[0021] Figure 3 Schematic diagram of the plates of a flat plate capacitor.

[0022] In the figure: 1. Physical connection terminal 1; 2. Power supply 1; 3. Resistor 1; 4. Resistor 2; 5. Capacitor 1; 6. Physical connection terminal 2; 7. Power supply 2; 8. Resistor 3; 9. Resistor 4; 10. Capacitor 2; 11. Plate 1; 12. Dielectric 1; 13. Dielectric 2; 14. Plate 2; 15. Flat plate capacitor. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figure 1-3 The utility model provides a technical solution: a capacitive coupling Ethernet slip ring module, which consists of a slip ring moving end and a slip ring fixed end.

[0025] The slip ring moving end includes a pair of physical connection terminals 1, a power supply 2, a resistor 3, a resistor 24 and a capacitor 5, wherein the two ends of the resistor 3 and the resistor 24 connected in series are respectively connected between the two physical connection terminals 1, the output end of the power supply 2 is connected to the capacitor 5 and then grounded, and the output end of the power supply 2 is connected to the series point of the resistor 3 and the resistor 24;

[0026] The fixed end of the slip ring includes a pair of physical connection terminals 2 6, a power supply 2 7, a resistor 3 8, a resistor 4 9 and a capacitor 2 10. The two ends of the resistor 3 8 and the resistor 4 9 are connected in series and are respectively connected between the two physical connection terminals 2 6. The output end of the power supply 2 7 is connected to the capacitor 2 10 and then grounded. The output end of the power supply 2 7 is connected to the series point of the resistor 3 8 and the resistor 4 9.

[0027] One of the physical connection terminals 1 and one of the physical connection terminals 2 6 are coupled and connected via a flat plate capacitor 15;

[0028] Another physical connection terminal 1 is coupled to another physical connection terminal 2 6 via another flat plate capacitor 15 .

[0029] The capacitor 1 5 and the capacitor 2 10 are both electrolytic capacitors, with their positive terminals connected to corresponding power supply terminals and their negative terminals grounded.

[0030] The network cable consists of two or four pairs of twisted wires, each pair of twisted wires transmits a set of differential signals. When using capacitance transmission, the capacitance coupling transmission circuit principle of each pair of twisted wires is as follows: Figure 1 As shown, the Ethernet signal is transmitted from one physical end (PHY) to another physical end (PHY) through a flat capacitor 15 in the middle. The capacitor meets the use requirements of the conductive slip ring, that is, one electrode is fixed and the other electrode needs to rotate 360° infinitely.

[0031] In practical applications, the resistor is generally 50Ω and the capacitor at the ground point is 0.1μF.

[0032] Based on the structure of the flat plate capacitor 15, in actual application, the flat plate capacitor 15 includes a plate 11, a dielectric 12, a dielectric 2 13 and a plate 2 14 stacked in sequence, and the plate 11 and the plate 2 14 can rotate relative to each other. The plate 11 is connected to one of the physical connection terminals 1 or 6, and the plate 2 14 is connected to the other physical connection terminal 2 6 or the physical connection terminal 1.

[0033] The dielectric 12 is made of ceramic material with a high dielectric constant.

[0034] Ceramic materials with high dielectric constants include but are not limited to aluminum oxide, boron nitride, titanium oxide, zirconium oxide or barium titanate, and the thickness of the dielectric 12 is controlled within 1 mm.

[0035] The second medium 13 is made of polytetrafluoroethylene material, and the thickness of the second medium 13 is controlled within 0.1 mm.

[0036] The side of the second medium 13 facing the second electrode plate 14 is coated with dimethyl silicone oil to enhance its lubrication performance.

[0037] like Figure 2 The overall dimensions of the capacitor plates are as follows: inner diameter A is 100mm, outer diameter B is 150mm, the circuit board is made of FR4, the board thickness is 2mm, and the copper thickness is 1oz. The narrower lines on the inside and outside are signal grounds with a line width of 2mm. The two wider lines in the middle are differential line pairs (connected to twisted pair cables).

[0038] The capacitance value of the flat plate capacitor 15 is 1-100nF.

[0039] The capacitance value of the assembled 15-plate capacitor module can be adjusted according to the type of Ethernet signal. The capacitance value for 100M signals is 10~100nF, and for Gigabit signals is 1~10nF. Because signal transmission is not affected by contact resistance fluctuations, as long as the relative distance between the capacitor plates is maintained, the service life can be more than ten times that of the brush-type Ethernet slip ring.

[0040] Through this technical solution, during operation, the first electrode plate 11 is fixed and the second electrode plate 14 rotates to achieve signal transmission.

[0041] The above embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

[0042] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A capacitively coupled Ethernet slip ring module, characterized in that: It consists of a slip ring moving end and a slip ring fixed end. The slip ring moving end includes a pair of physical connection terminals 1, a power supply 1, a resistor 1, a resistor 2 and a capacitor 1, wherein the two ends of the resistor 1 and the resistor 2 are connected in series and are respectively connected between the two physical connection terminals 1, the output end of the power supply 1 is connected to the capacitor 1 and then grounded, and the output end of the power supply 1 is connected to the series connection point of the resistor 1 and the resistor 2; The fixed end of the slip ring includes a pair of physical connection terminals 2, a power supply 2, a resistor 3, a resistor 4 and a capacitor 2, wherein the two ends of the resistor 3 and the resistor 4 are connected in series and are respectively connected between the two physical connection terminals 2, the output end of the power supply 2 is connected to the capacitor 2 and then grounded, and the output end of the power supply 2 is connected to the series connection point of the resistor 3 and the resistor 4. One of the physical connection terminals 1 is coupled to one of the physical connection terminals 2 via a flat plate capacitor; Another physical connection terminal 1 is coupled to another physical connection terminal 2 via another flat plate capacitor.

2. A capacitively coupled Ethernet slip ring module according to claim 1, characterized in that: The capacitor 1 and the capacitor 2 are both electrolytic capacitors, the positive terminals of the capacitors are connected to the corresponding power supply terminals, and the negative terminals are grounded.

3. The capacitively coupled Ethernet slip ring module according to claim 1, wherein: The flat plate capacitor includes a first plate, a first dielectric, a second dielectric and a second plate stacked in sequence. The first plate and the second plate can rotate relative to each other. The first plate is connected to one of the first physical connection end or the second physical connection end, and the second plate is connected to the other second physical connection end or the first physical connection end.

4. The capacitively coupled Ethernet slip ring module according to claim 3, wherein: The medium 1 is made of ceramic material with high dielectric constant.

5. The capacitively coupled Ethernet slip ring module according to claim 4, wherein: The high dielectric constant ceramic material includes but is not limited to aluminum oxide, boron nitride, titanium oxide, zirconium oxide or barium titanate.

6. The capacitively coupled Ethernet slip ring module according to claim 3, wherein: The second medium is made of polytetrafluoroethylene.

7. The capacitively coupled Ethernet slip ring module according to claim 6, wherein: The side of the medium 2 facing the electrode plate 2 is coated with dimethyl silicone oil.

8. The capacitively coupled Ethernet slip ring module according to claim 3, wherein: The capacitance value of the flat plate capacitor is 1-100nF.

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