63results about How to "Improve signal shielding effect" patented technology

The invention discloses a preparation method of a coaxial cable, which relates to the field of cable processing. The coaxial cable includes an inner conductor, an insulating layer, a shielding layer and an outer sheath, and the insulating layer includes a rubber layer and a foaming layer, wherein , take the oxygen-free copper core as the inner conductor, after straightening, sizing, and ultrasonic cleaning, dry the surface with nitrogen, and then spray the silver paste evenly on the surface of the oxygen-free copper core with a high-pressure spray gun to obtain the inner conductor. The silver-plated coating on the oxygen copper core protects the copper core against oxidation, prolongs the service life, enhances the directionality of signal transmission, and improves the signal quality. A rubber layer is provided outside the inner conductor to reduce the bending flexibility of the coaxial cable , There are heat dissipation holes on the rubber layer, which can help the inner conductor dissipate the heat generated during work, reduce the resistance of long-term work, and increase the current. In the outer sheath, aluminum hydroxide and magnesium hydroxide are added to the outer sheath. Triphenyl phosphite is used as an antioxidant to increase the flame retardant and anti-aging properties of the outer sheath.

The invention provides a high-frequency slip ring device. The high-frequency slip ring device comprises a main shaft (1) and a plurality of slip ring portions, wherein the main shaft (1) is made of metal; the multiple slip ring portions are arranged on the main shaft (1) in a sleeved mode, each slip ring portion comprises a signal loop (11) and two shielding loops (12), and the two shielding loops (12) of each slip ring portion are arranged on the two opposite sides of the corresponding signal loop (11). According to the high-frequency slip ring device, the technical problems that in the prior art, electric signals leak between slip rings, and the signal shielding effect is not good are solved.

The invention discloses an RFID scaleplate scale device with a communication micro passage and a building method of the RFID scaleplate scale device with the communication micro passage. The RFID scaleplate scale device with the communication micro passage comprises two or more micro passage assemblies, a channel converging rail, a scaleplate pointer, a shielding assembly and a scaleplate. Each micro passage assembly further comprises a micro channel outlet embedded into a through hole of the channel converging rail, the scaleplate pointer is arranged on the shielding assembly, one end of the scaleplate pointer is directed at the scaleplate, and the interval between every two adjacent micro passage assemblies corresponds to the scales on the scaleplate. The shielding assembly can move on the channel converging rail along with the scaleplate pointer in two directions, when the shielding assembly moves to the position above any one micro channel outlet along with the scaleplate pointer, the shielding assembly connects or disconnects the communication between an RFID electronic tag corresponding to the micro channel outlet and an external RFID system, and therefore changes of an external measurement angle or linear displacement are obtained. The RFID scaleplate scale device with the communication micro passage and the building method of the RFID scaleplate scale device with the communication micro passage have the advantages of being simple in measurement, convenient to built and capable of being identified in a non-touch mode and achieving real-time detection, and can be widely applied to the field of engineering measurement.