4 results about "Third wave" patented technology

Disclosed is a phase measurement device, comprising: a first wave plate, a first polarization splitting prism, a fourth wave plate, a retroreflector, a third wave plate, a reflector, a second wave plate, a polarizer, a second polarization splitting prism, a third polarization splitting prism, a first photoelectric detector, a second photoelectric detector, and a base, wherein the first to third polarization splitting prisms and the first and second photoelectric detectors are fixed on the base; the first to fourth wave plates are respectively arranged around the periphery of the first polarization splitting prism; the polarizer is arranged on an emitting surface of the third polarization splitting prism; the retroreflector is arranged on an outer side of the fourth wave plate; and the reflector is arranged on an outer side of the third wave plate. An interferometric signal is resolved to obtain a measurement light beam phase.

The application discloses a corrugated plate spacing adjusting device, which comprises a guide fixing seat, a first wave crest clamping mechanism, a second wave crest clamping mechanism, a third wave crest clamping mechanism and a wave crest clamping groove. The first wave crest clamping mechanism, the second wave crest clamping mechanism and the third wave crest clamping mechanism are supported by the guide fixing seat, and the wave crest clamping groove is matched with the wave crest clamping mechanism to accommodate the wave crest of the corrugated plate, so that independent clamping of the wave crest of different corrugated plates is realized. The relative positions of the first wave crest clamping mechanism, the second wave crest clamping mechanism and the third wave crest clamping mechanism are moved, the distance between two corrugated plates is adjusted, the joint width of the two corrugated plates is synchronously adjusted, a plurality of wave crest clamping mechanisms are matched to prevent the corrugated plates from being separated, a stable supporting structure is provided, and the continuity and safety of assembly work are improved.

Examples of fault location in a power transmission line connecting a first and a second terminal is described. In an example, arrival times of a first peak, a second peak, and a third peak of a travelling wave detected from measurements carried out at the first and second terminals is detected. A rise time associated with the first peak of the travelling wave is calculated. One of a first half and a second half of the power transmission line is identified, as having a fault, based on a comparison of the rise time. One of a first segment, a second segment, a third segment, and a fourth segment of the power transmission line is identified as having the fault. Length of the power transmission line is estimated. The fault location is estimated based on identification of one of the first, second, third, and fourth segments as having the fault.

The invention discloses a flashlight, which relates to the technical field of lighting equipment and comprises a connecting cylinder and a telescopic sleeve. A lamp holder with a lamp bead piece is arranged at the end of the connecting cylinder, and a first wave-shaped groove and a third wave-shaped groove are formed in the peripheries of the two axial ends of the lamp holder correspondingly. The telescopic sleeve is rotatably connected to the connecting cylinder in a sleeving mode, a waveform mother cylinder is arranged at one end in the telescopic sleeve, a fourth waveform groove is formed in the other end of the telescopic sleeve, the telescopic sleeve is connected with a lens, and a second waveform groove is formed in the periphery, opposite to the first waveform groove, of the waveform mother cylinder; wherein the first wave-shaped groove and the second wave-shaped groove are in sliding butt joint in the circumferential direction, the third wave-shaped groove and the fourth wave-shaped groove are in sliding butt joint in the circumferential direction, the distance between the second wave-shaped groove and the fourth wave-shaped groove in the axial direction is not changed, and the butt joint positions of the first wave-shaped groove and the second wave-shaped groove and the butt joint positions of the third wave-shaped groove and the fourth wave-shaped groove change alternately. According to the technical scheme, continuous and flexible zooming of the flashlight is achieved, and the convenience of zooming operation is improved.