43results about How to "Small external interference factors" patented technology

The invention discloses a plastic tube connector connecting structure which is long in service life. The plastic tube connector connecting structure comprises a left plastic tube section and a right plastic tube section, a left metallic sheath concentric with the left plastic tube section is arranged on the outer side of one end of the left plastic tube section, external threads are arranged on the outer side of the left metallic sheath, a right metallic sheath concentric with the right plastic tube section is arranged on the inner side of one end of the right plastic tube section, internal threads meshed with the external threads are arranged on the inner side of the right metallic sheath, the left plastic tube section and the left metallic sheath are of an integrated structure through injection molding, and the right plastic tube section and the right metallic sheath are of an integrated structure through injection molding. The plastic tube connector connecting structure has the advantages that the metallic sheathes are arranged in plastic tube connectors, the plastic tube connectors and the metallic sheathes form a whole through injection molding, the two plastic tube sections are connected in the mode that the threads are machined on the metallic sheathes, the structure is stable, external interference factors are small, and the service life of the plastic tube connectors is greatly prolonged.

The invention discloses a seamless table tennis ball bounce performance checking and selecting method which is implemented using an inclined surface bounce and collision detection equipment. The method comprises steps of 1) using the inclined surface bounce and collision detection equipment to perform bounce performance calibration and detection of all levels of seamless table tennis balls by level, and obtaining reference calibration areas of all levels of the seamless table tennis balls; 2) writing the reference calibration areas of all levels of the seamless table tennis balls in a processor; and 3) using the inclined surface bounce and collision detection equipment for checking and selecting a to-be-detected seamless table tennis ball. Influences of the falling initial speed of the table tennis ball can be eliminated, errors caused by non-uniform bounce performances of different areas of the spherical surface of the table tennis ball, and real-time online detection can be achieved.

In order to realize the stable supply and measurement of tiny flow, the invention provides a tiny flow supply and measurement device. The device includes a constant pressure unit, a supply unit and a measurement unit; the constant pressure unit includes an automatic pressure regulator and a constant pressure balance container; the inlet of the constant pressure balance container is connected to the gas source through the automatic pressure regulator, and the outlet is connected to the supply unit; the supply The unit includes a propellant supply container, an electronic scale, a first damping assembly and a supply pipeline, the inlet of the propellant supply container is connected to the outlet of the constant pressure balance container, and the outlet is connected to the measuring unit through the supply pipeline; the electronic scale is installed on the propulsion Below the agent supply container, the first damping assembly is arranged below the electronic scale; the measuring unit includes a first capillary, a mass flow meter, a second capillary and a measuring pipeline connected in sequence, and a second filter, a second filter, and a measuring pipeline are arranged on the measuring pipeline. A second pneumatic control valve and a pneumatic discharge valve; the inlet of the first capillary is connected with the supply line.