A conductive slip ring for stable transmission of 1553B signals for space mechanisms

Abstract

The present invention belongs to the technical field of electric rotation transmission, and specifically relates to a conductive slip ring for stable transmission of 1553B signals for space mechanisms. The present invention includes a plurality of signal channels sleeved on the outer peripheral surface of the slip ring main shaft, and an insulating gasket is arranged between each two adjacent signal channels; the signal channel includes a single V-groove, a first double V-groove and a second double V-groove which are sequentially installed on the main shaft, and insulating gaskets are arranged between the single V-groove and the first double V-groove, and between the first double V-groove and the second double V-groove, and the brush wires of the brush wire assembly are in contact with the single V-groove, the first double V-groove and the second double V-groove. The conductive slip ring main shaft of the present invention adopts axial shielding and transmission signal channel grouping, which improves the anti-interference ability and transmission stability of the conductive slip ring in transmitting 1553 signals, and can be used in the space environment of space structure mechanisms to realize simultaneous transmission of multiple signals, achieve high-quality signal transmission, and control the bit error rate to be lower than 10 ‑7 .

Description

Technical Field

[0001] The invention belongs to the technical field of electric rotation transmission, and in particular relates to a conductive slip ring for stable transmission of 1553B signals for space mechanisms. Background Art

[0002] Conductive slip ring is a rotating transmission device composed of rotating parts and structural support components. It can realize signal transmission between two devices that rotate 360° freely without restriction. It is mainly used in the systems of rotating power transmission in the fields of aviation, aerospace, navigation and weapons. Conductive slip ring products with different structural forms are designed according to the type of transmitted signals.

[0003] The signal transmission quality of the conductive slip ring in the space structure is high, and it needs to be transmitted together with different types of signals. In the electric rotary transmission device, there are generally multiple signals transmitted together, such as serial port signals, 1553B signals, and LVDS video signals; high-power power supply and serial port signals, 1553B signals, LVDS video signals. In the process of mixed transmission of multiple signals, it is necessary to achieve stable transmission of 1553B signals with a bit error rate of less than 10 -7 .

[0004] 1553B belongs to bus signal transmission. The structure of its transmission line is that the slip ring 1553B line is a twisted-pair shielded sheathed line type. Its structure is: inner layer: generally composed of blue and white twisted-pair wires, and a silver-plated metal shielding layer; outer layer: insulating layer sheath (generally blue); middle: mixed with some supporting insulating materials. This structure has unstable signal transmission, high bit error rate and cannot realize multi-channel signal transmission. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of unstable signal transmission, high bit error rate and inability to realize multi-channel signal transmission in the prior art, and to provide a plurality of groups of signals for parallel continuous transmission, optimize the impedance matching spacing, and realize a transmission bit error rate lower than 10 -7 The space mechanism uses a conductive slip ring for stable transmission of 1553B signals.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] A conductive slip ring for stable transmission of 1553B signals for space mechanisms, comprising a combined bracket mounted on a flange, a main shaft rotatably mounted inside the combined bracket through a bearing, and a brush assembly mounted outside the main shaft, wherein a plurality of signal channels for parallel transmission of a plurality of signals are sleeved on the outer circumference of the main shaft, and an insulating gasket is arranged between each two adjacent signal channels; the signal channel comprises a single V-groove, a first double V-groove, and a second double V-groove which are sequentially mounted on the main shaft, insulating gaskets are arranged between the single V-groove and the first double V-groove, and between the first double V-groove and the second double V-groove, and brush wires of the brush assembly are in contact with the single V-groove, the first double V-groove, and the second double V-groove.

[0008] Furthermore, an outer cover is installed on the combined bracket, and the outer cover is made of non-magnetic material.

[0009] Furthermore, the signal channels are divided into four groups, and the insulating gasket is 1 mm higher than the single V-groove, the first double V-groove and the second double V-groove.

[0010] Furthermore, the width of the insulating gasket is 1 mm.

[0011] Furthermore, the single V-shaped groove has two contacts for shielding, and the first double V-shaped groove has four contacts for stabilizing signal transmission.

[0012] The beneficial effects of the conductive slip ring for stable transmission of 1553B signals for a space mechanism of the present invention are:

[0013] The conductive slip ring main shaft of the present invention adopts axial shielding and transmission signal channel grouping, single V-grooves and double V-grooves are arranged regularly, and an insulating gasket 1mm higher than the V-groove is provided, which improves the anti-interference ability and transmission stability of the conductive slip ring in transmitting 1553 signals. It can be used in the space environment working conditions of space structure mechanism to realize multi-channel signal transmission at the same time, and the transmission impedance is matched to 100±10Ω, so as to realize high-quality signal transmission, and control the bit error rate to be lower than 10 -7 , which meets the requirements of the structural structure of the space environment for the 1553B signal transmission of the conductive slip ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0015] Figure 1 is a structural diagram of a conductive slip ring according to an embodiment of the present invention;

[0016] Figure 2 is a detailed diagram of a signal path according to an embodiment of the present invention;

[0017] Figure 3is a schematic diagram of the structure of a signal channel according to an embodiment of the present invention;

[0018] Figure 4 It is a detailed installation diagram of the signal channel and the brush assembly according to an embodiment of the present invention.

[0019] In the figure: 1. combined bracket, 2. bearing, 3. brush assembly, 31. brush wire, 4. main shaft, 5. signal channel, 51. single V-shaped groove, 52. first double V-shaped groove, 53. second double V-shaped groove, 54. insulating gasket, 6. outer cover. DETAILED DESCRIPTION

[0020] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0021] like Figure 1-Figure 4 The specific embodiment of the conductive slip ring for stable transmission of 1553B signals for a spatial mechanism of the present invention shown in the figure comprises a combined bracket 1 mounted on a flange, a main shaft 4 rotatably mounted inside the combined bracket 1 through a bearing 2, and a brush assembly 3 mounted on the outside of the main shaft 4, a plurality of signal channels 5 for parallel transmission of multiple signals are sleeved on the outer circumferential surface of the main shaft 4, an insulating gasket 54 is arranged between each adjacent two signal channels 5; the signal channel 5 comprises a single V-groove 51, a first double V-groove 52 and a second double V-groove 53 which are sequentially mounted on the main shaft 4, insulating gaskets 54 are arranged between the single V-groove 51 and the first double V-groove 52, and between the first double V-groove 52 and the second double V-groove 53, and the brush wires 31 of the brush assembly 3 are in contact with the single V-groove 51, the first double V-groove 52 and the second double V-groove 53.

[0022] Based on the existing conductive slip ring design structure, such as Figure 1-2 As shown, the shaft 1 of the conductive slip ring is equipped with a single V-groove 51, a double V-groove and a double V-groove arrangement structure, wherein each single V-groove 51, the first double V-groove 52 and the second double V-groove 53 are arranged as a group of signal channels 5, and 4 groups can be arranged to meet the transmission of 4 channels of signals, and there will be no interference between the signals. Figure 2 As shown, an insulating gasket 54 is placed between each single V-shaped groove 51 and double V-shaped groove. The width of the insulating gasket 54 is 1 mm, and the insulating gasket 54 is 1 mm higher than the single V-shaped groove 51 and the double V-shaped groove, so as to ensure that the impedance matching between adjacent loops reaches 100±10Ω, reaching the 1553B signal transmission impedance range, thereby achieving a signal bit error rate of less than 10 -7 .

[0023] For the 1553B transmission bus signal, 4 1553B signals are transmitted in groups in a shielding-signal transmission-shielding arrangement. The signal transmission point is a double V-groove with 4 contacts. The width of the insulating gasket of the signal impedance is 1mm, and the insulating gasket protrudes 1mm from the V-groove, realizing the 1553B signal transmission impedance. The double V-groove structure is designed with a stable impedance within the range of 100±10Ω. The impedance spacing between the three channels in each group of 1553B signals is 1mm, and the insulating gasket 54 protrudes 1mm. Shielded and isolated insulating gaskets 54 are set between each group of 1553B signals to improve anti-interference measures.

[0024] In the embodiment of the present invention, the bearing 2 is a molybdenum-plated bearing, which is used to connect the main shaft 4 and the combined bracket 1 to realize the rotation function of the conductive slip ring. During the rotation process, the single V-groove 51, the first double V-groove 52 and the brush wire 31 are in stable contact, and the single V-groove 51 has 2 contacts for shielding, and the first double V-groove 52 has 4 contacts for stable signal transmission.

[0025] In the embodiment of the present invention, the signal channel 5 is divided into four groups. The insulating gasket 54 is 1 mm higher than the single V-groove 51, the first double V-groove 52 and the second double V-groove 53. The width of the insulating gasket 54 is 1 mm. The 1553B group transmission concept is adopted. Each group of signals is continuously transmitted in parallel according to the distribution of the shielding signal, the blue line and the white line. The shielding ring is used as the isolation design technology. At the same time, the impedance matching spacing is optimized, and the transmission bit error rate is achieved to be less than 10 -7 , meeting the requirements of 4-way signal transmission. It can be used in space environment conditions of space structure mechanism, and transmit multiple signals in parallel. The signal transmission bit error rate of the conductive slip ring is less than 10 -7 .

[0026] like Figure 1 and Figure 3 As shown, an outer cover 6 is installed on the combined bracket 1 of the embodiment of the present invention. The outer cover 6 is made of non-magnetic material. The outer cover 6 is made of non-magnetic material, which can reduce electromagnetic interference in the circumferential direction.

[0027] It should be understood that the specific embodiments described above are only used to explain the present invention, and are not used to limit the present invention. Obvious changes or modifications derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims

1. A conductive slip ring for stable transmission of 1553B signals for space mechanisms, comprising a combined bracket (1) mounted on a flange, a main shaft (4) rotatably mounted inside the combined bracket (1) via a bearing (2), and a brush assembly (3) mounted outside the main shaft (4), characterized in that: A plurality of signal channels (5) for parallel transmission of a plurality of signals are sleeved on the outer circumferential surface of the main shaft (4), and an insulating gasket (54) is arranged between each two adjacent signal channels (5); the signal channel (5) comprises a single V-shaped groove (51), a first double V-shaped groove (52), and a second double V-shaped groove (53) which are sequentially mounted on the main shaft (4); an insulating gasket (54) is arranged between the single V-shaped groove (51) and the first double V-shaped groove (52), and between the first double V-shaped groove (52) and the second double V-shaped groove (53); a brush wire (31) of the brush assembly (3) is connected to the single V-shaped groove (51) and the first double V-shaped groove (52). The single V-shaped groove (51), the first double V-shaped groove (52) and the second double V-shaped groove (53) are all in contact; the insulating gasket (54) is an insulating gasket (54) for shielding and isolation; the signal channels (5) are four groups, and the insulating gasket (54) is 1 mm higher than the single V-shaped groove (51), the first double V-shaped groove (52) and the second double V-shaped groove (53); the width of the insulating gasket (54) is 1 mm; it is ensured that the impedance matching between adjacent loops reaches 100±10Ω; the single V-shaped groove (51) has two contacts for shielding, and the first double V-shaped groove (52) has four contacts for stabilizing signal transmission.

2. The conductive slip ring for stable transmission of 1553B signals for space mechanisms according to claim 1, characterized in that: An outer cover (6) is mounted on the combined bracket (1), and the outer cover (6) is made of non-magnetic material.

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