Month: May 2024

JINPAT has always focused on providing cost-effective solutions for 360° rotation electrical conduction and signal transmission across various industries. They excel in the development of high-difficulty slip rings, capable of integrating multiple signals, currents,and fluid paths into a single slip ring while meeting high standards for protection, vibration resistance, and impact resistance.

 

Addressing the demand for 360° rotation signal transmission in the automation sector, JINPAT has developed various models of signal slip rings. Apart from specialized multi-channel USB 2.0/3.0signal slip rings, they have also developed high-definition video signal, CAN signal, control signal, and fiber optic signal slip rings based on current slip ring technology. These high-precision conducting slip rings are technically advanced products, with optoelectronic integrated conducting slip rings being the most challenging to develop. JINPAT’s optoelectronic integrated slip rings are the perfect companion for high-speed, lossless signal transmission in precision instruments and high-end automation equipment.

 

Taking the latest developed slip ring model, LPT000-0910-3E3-FO04, as an example, this integrated slip ring features conductivity, multi-channel signal transmission, and integrated fiber opticpaths. It operates at 480V and can transmit 3 sets of gigabit Ethernet signals.Additionally, it integrates four channels of fiber optics with a wavelength range between 1310nm and 1590nm, an insertion loss of less than 4db, and a fiber bending radius of 30mm. It also boasts excellent temperature resistance and a robust housing, capable of operating under temperatures ranging from -45℃ to +80℃. The housingis made of aluminum alloy, combining light weight and durability, ensuring reliable long-term operation of the equipment.

 

In comparison, the LPT000-1210-39S-01E3-12FO model has even lower insertion loss and features 12 channels of fiber optic paths with a lifespan exceeding 10 million rotations.It operates under temperatures ranging from -30℃ to +80℃ and offerseasy installation.

 

Within JINPAT’s optoelectronic integrated slip rings, the LPC-1F series finds broader applications, forming an independent product line. This series features compact design, with a diameter of only 24.8mm, significantly saving installation space on terminal platforms.While having a single fiber optic channel, it also integrates 12, 24, 30, and36 channels of current paths. Compared to single-channel fiber optic slip rings, this slip ring not only addresses signal transmission issues but also provides power transmission paths for customers.

 

Moreover, the pricing of this series is almost identical to that of single-channel fiber optic slip rings, making it acost-effective high-precision conducting slip ring. The JINPAT LPC-1F series fiber optic slip rings have a return loss greater than 45db, operating wavelength between 850~1550nm, insertion loss less than 2db with a typical value of 0.5db, and insertion loss variation of +/-0.25db with a typical value of +/-0.15db. Fiber types can be selected as single-mode or multi-mode, and connector types include ST/FC/SC/LC, among others.

Many electromechanical products have corresponding protection levels, and the higher the protection level, the stronger the environmental adaptability. In the product series of JINPAT, there are also products with the highest IP68 protection level. These products include some customized miniature capsule slip rings and certain models of fiber optic slip rings. These high-protection-level slip rings can adapt to relatively extreme and harsh external environments,such as underwater high-pressure environments, high cold environments, tropical rainforest humid environments, etc.

 

Natural environments exist objectively, and in people’s production and life, they will always create some new environments. Some of these artificially created new environments may be much more extreme than harsh environments under natural conditions. However, in these artificially created extremely harsh environments, there are still electromechanical devices that require slip ring support in operation.

 

Firstly,there is high temperature. A common type of equipment is high-temperature rollers, which operate at temperatures above 100℃. Although such equipment does not have high rotational speeds and does not require changes in slip ring structure, it extremely tests the stability of slip ring operation at ultra-high temperatures. If the overall high-temperature resistance performance of the slip ring is not up to standard, it may lead to problems such as low insulation with stand voltage strength, abnormal fluctuation of dynamic resistance values, and abnormal signal transmission. In solving problems such as abnormal signal transmission and insufficient insulation withstand voltage strength of slip rings operating at temperatures above 100℃, JINPAT has rich experience. Taking the LPC-0303-HD01 high-definition video slip ring as an example, when this slip ring operates, it is immersed in 201 methyl silicone oil with a pressure of up to 140 MPa, and the maximum external ambient temperature can reach 200℃.With years of experience, JINPAT has perfectly solved the problems of poorhigh-definition video transmission and insulation withstand voltage values of this product under high temperature and high pressure conditions.

 

The slip rings mentioned above need to operate at extremely high temperatures, but some slip rings represent another extreme, being extremely sensitive to high temperatures. Once a certain temperature is exceeded, the performance of the slip ring will also decline linearly. These types of slip rings are generally mainly high-speed slip rings. In general, slip rings with a working speed of 20,000 rpm require certain heat dissipation measures, while slip rings with higher speeds will adopt more aggressive heat dissipation measures, such as using liquid nitrogen at -195.8℃ to cool the slip rings. Due to their extremely special purposes and very small market demand, the development technology of slip rings that can withstand temperatures close to minus 200℃ is currently blank, and there are no slip ring manufacturers with development plans or finished products.

Signal slip rings are a crucial category within slip rings, responsible for the 360° rotation transmission of signals in electromechanical systems. If classified simply by signal type, signal slip rings on the market are essentially divided into electrical signal slip rings and optical signal slip rings. The former transmit electric current using various types of conductors, and the types of conductors used vary greatly depending on the signal type. The latter transmit light in special frequency bands, using optical fibers as the transmission medium, hence optical signal slip rings are also known as fiber optic slip rings.

 

From the perspective of development difficulty, multi-channel fiber optic slip rings are the most technically advanced products among all signal slip rings. The technical challenge of multi-channel fiber optic slip rings, particularly single-mode fiber optic slip rings, lies in the internal prism or other lens systems. From an optical perspective, multi-channel fiber optic slip rings belong to a highly precise optical system. On the other hand, traditional electrical signal slip rings fall within the realm of electrical engineering. In contrast to the two types of wires used in fiber optic slip rings, traditional electrical signal slip rings involve a wide variety of wire types for transmitting numerous electrical signals.

 

Taking common signals in the electromechanical industry such as USB, DP, HDMI, and Ethernet as examples,each of these signals requires corresponding wires. JINPAT has also developed signal slip rings specifically for such signals, such as DP slip rings,multi-channel USB 2.0 signal slip rings, and gigabit Ethernet slip rings.Although the wires used in these electrical signal slip rings are specialized,fundamentally, they are achieved through the use of different common conductors twisted together and then externally connected to specialized connectors.Therefore, in the field of signal slip rings, twisted pair cables are the most widely used method for signal transmission. Apart from twisted pair cables,another common type of wire in electrical signal slip rings is coaxial cables,which consist of inner and outer layers and are available in two characteristic impedance classes of 50 and 75 ohms. These are respectively used for transmitting radio frequency signals and high-definition video signals.