Abstract: Disclosed are a device and method for detecting defects of a high-voltage cable cross-bonded grounding system. The method comprises: selecting a protective grounding box of a cross-bonded grounding system, respectively connecting a signal excitation coupler to A-phase, B-phase and C-phase coaxial cables of the protective grounding box, selecting a stable signal with a frequency different from a power frequency or a field interference frequency, and testing effective current values and phases responded by the A-phase, B-phase and C-phase coaxial cables when the stable signal with the frequency F1 is injected into the A-phase, B-phase and C-phase coaxial cables of the protective grounding box in a coupled manner; and obtaining resistances and inductances of branch circuits of the cable cross-bonded grounding system by calculation according to measurement data, and determining if the cable cross-bonded grounding system has a connection defect.

Abstract: A sample gauge length and length after fracture measuring device includes a worktable, a first sliding table support and a second sliding table support, a control and length display, a spiral micrometer head, a scriber, a sample, etc. The reading device using the spiral micrometer head to directly measure the gauge length and the length after fracture has a detection accuracy of ±0.01 mm, which is superior to the requirement of ±0.05 mm in GB/T228 Metallic Materials Tensile Testing at Ambient Temperature.

Abstract: A sample gauge length and length after fracture measuring device includes a worktable, a first sliding table support and a second sliding table support, a control and length display, a spiral micrometer head, a scriber, a sample, etc. The reading device using the spiral micrometer head to directly measure the gauge length and the length after fracture has a detection accuracy of ±0.01 mm, which is superior to the requirement of ±0.05 mm in GB/T228 Metallic Materials Tensile Testing at Ambient Temperature.

Abstract: The present disclosure relates to the field of motor vehicles. The teachings thereof may be embodied in a self-locking internal damper comprising: a damper body with a closed chamber; each of two ends of the closed chamber in the length direction including a straight plate section projecting therefrom, with a center line of the straight plate section passing through a center point of the closed chamber; two connecting portions located at ends of the two straight plate sections, respectively; and at least one of the two connecting portions including a bent structure formed by extending and bending one of the straight plate sections.

Abstract: A fuel guiderail assembly and an internal damper holder used for the fuel guiderail assembly. The fuel guiderail assembly comprises a fuel guiderail, a first end cap and a second end cap used to close the fuel guiderail, internal dampers, and a first internal damper holder and a second internal damper holder. The internal damper is provided with a first end and a second end. The first end and second end each comprise a main body and a raised part provided on the main body. The holders comprise a clamping part with a slit and a first holding part and a second holding part connected to the clamping part through the first elastic part and the second elastic part, respectively.

Abstract: The present disclosure relates to the field of motor vehicles. The teachings thereof may be embodied in a self-locking internal damper comprising: a damper body with a closed chamber; each of two ends of the closed chamber in the length direction including a straight plate section projecting therefrom, with a center line of the straight plate section passing through a center point of the closed chamber; two connecting portions located at ends of the two straight plate sections, respectively; and at least one of the two connecting portions including a bent structure formed by extending and bending one of the straight plate sections.

Abstract: A fuel guiderail assembly and an internal damper holder used for the fuel guiderail assembly. The fuel guiderail assembly comprises a fuel guiderail, a first end cap and a second end cap used to close the fuel guiderail, internal dampers, and a first internal damper holder and a second internal damper holder. The internal damper is provided with a first end and a second end. The first end and second end each comprise a main body and a raised part provided on the main body. The holders comprise a clamping part with a slit and a first holding part and a second holding part connected to the clamping part through the first elastic part and the second elastic part, respectively.