Abstract: A measuring device includes a housing and a power source, a conductive detecting unit arranged in the housing and connected with the power source, a carrier facing the conductive detecting unit, connection terminals arranged on the carrier and connected with the power source, and a lifting mechanism configured to control the conductive detecting unit and the carrier to move relatively in the first direction. wherein the The carrying surface of the carrier is parallel to the main surface of the conductive detecting unit, and the first direction is a direction perpendicular to the carrying surface.

Abstract: A measuring device includes a housing and a power source, a conductive detecting unit arranged in the housing and connected with the power source, a carrier facing the conductive detecting unit, connection terminals arranged on the carrier and connected with the power source, and a lifting mechanism configured to control the conductive detecting unit and the carrier to move relatively in the first direction. wherein the The carrying surface of the carrier is parallel to the main surface of the conductive detecting unit, and the first direction is a direction perpendicular to the carrying surface.

Abstract: The present invention provides a toughened epoxy resin/glass fiber prepreg and a preparation method thereof. In a vacuum apparatus, a plasma-treated glass fiber cloth is impregnated with a toughened epoxy resin so as to form a prepreg with the reinforced fibers fully impregnated with the matrix resin, wherein the resin content is greater than or equal to 15% and less than or equal to 30%. A vacuum infusion process used in the present invention solves problem such as a complex preparation process, relatively high costs and difficult control of the resin content and the like in the current glass fiber prepregs. In addition, the toughened epoxy resin used in the prepreg comprises a mixed amine curing agent and a nano-toughening agent, which has a significant toughening effect, results in a resin casting body of excellent properties, and produces a composite material by curing a prepreg with a glass fiber woven cloth through impregnation under vacuum conditions, which has excellent impact resistance.