Method and system for wireless communication between terminals and half-duplex base stations

    公开(公告)号:US10333665B2

    公开(公告)日:2019-06-25

    申请号:US15551155

    申请日:2016-02-19

    申请人: SIGFOX

    摘要: A wireless communication method between a plurality of terminals and an access network. The access network is configured to transmit downlink messages on a downlink in reply to uplink messages transmitted by the terminals. The access network includes a plurality of half-duplex base stations. Each terminal waiting for a downlink message in reply to a transmitted uplink message is configured to listen to the downlink in a listening window, the duration of which is at least five times that of the downlink message. The method includes the steps of determining if listening windows of terminals overlap. When an overlap allows the transmission of several downlink messages by a single base station, the downlink messages are transmitted grouped together in a single transmission window of the base station.

    Well stimulation tool comprising an articulated link

    公开(公告)号:US10309206B2

    公开(公告)日:2019-06-04

    申请号:US15546376

    申请日:2016-01-26

    申请人: ENE29 S.ÀR.L.

    摘要: An electrical tool for well stimulation includes a first electrode and a second electrode. The second electrode being at the level of a first segment and a second segment of the tool. A peripheral electrode insulated electrically from the first electrode. The first segment and the second segment are linked by an articulated link inside which is arranged a coaxial cable running from the first segment to the second segment. The coaxial cable includes an electrically conducting outer envelope insulated electrically from an electrically conducting central core. The tool includes a first electrical contact between the central core of the coaxial cable and the first electrode, and a second electrical contact between the outer envelope of the coaxial cable and the second electrode.

    Stereoscopic sheet having variable perspective viewing angle and thin-layered stereoscopic sheet

    公开(公告)号:US10302956B2

    公开(公告)日:2019-05-28

    申请号:US15113833

    申请日:2015-01-26

    发明人: Hyunjea Shin

    IPC分类号: G02B27/22

    摘要: A stereoscopic sheet having a variable perspective viewing angle and a thin-layered stereoscopic sheet having a three-dimensional decorative effect. The portions of the sheet, viewed three-dimensionally, create dynamic changes according to the perspective distance. The stereoscopic sheet includes convex lenses arrayed on the top surface of the stereoscopic sheet to intersect at regular intervals. A printed layer is formed at the focal distance of the convex lenses. The focal distance of the convex lenses is formed to be approximately 3.5 times longer than the pitch. A repetition gap of a printed pattern formed on a portion of a printed area is determined as a pattern gap to allow the impression of depth or protrusion to be sensed at a short-sighted distance. The repetition gap of the printed pattern is less than a parallax gap at a minimum proximity distance within the short-sighted distance by approximately 80%-98%.

    Marking of the tool center and of the orientation of an acoustic probe in a reference frame, by ultrasound method

    公开(公告)号:US10201899B2

    公开(公告)日:2019-02-12

    申请号:US15106809

    申请日:2014-12-22

    申请人: AIRBUS GROUP SAS

    IPC分类号: B25J9/16

    摘要: A process for marking the real position and real orientation of a tool in relation to the manipulator arm of a robot. The process utilizes the amplitude measurements of acoustic signals and the flight time measurement of the acoustic waves emitted by an acoustic probe of the tool and reflected by the fixed reference elements. The position of the center of reference of the probe relative to the end of the manipulator arm is determined. The axes X and Y defining the plane of the probe along reference axes X′ and Y′ of known orientations are oriented so that the modification of the position and of the orientation of the probe in the reference frame can be defined. The displacements of the manipulator arm are managed by the controller based on the position of the probe in relation to the manipulator arm and the reference orientation of the probe.

    Fine heating wire and heating unit using the same

    公开(公告)号:US10080260B2

    公开(公告)日:2018-09-18

    申请号:US14421148

    申请日:2013-05-15

    申请人: NEWZIRO CO., LTD.

    发明人: Bongchel Shin

    摘要: A fine heating wire having a small diameter and applicable to various products. The fine heating wire is bendable, densely installed, and has high thermal efficiency. It includes a core formed with synthetic fiber material and a coil spirally wound around the outer portion of the core. The core connects one or more pairs of polyaramid fiber units. Each unit is formed by braiding dozens to hundreds of fine polyaramid fiber strands to maintain the diameter within 200-600 denier. The coil is formed of copper or copper alloy to withstand temperature rising up to 60° within five minutes when 3.7-12V power is supplied to maintain a resistance per unit length value equal to or greater than 0.5 Ω/m. The diameter of the fine heating wire is minimized to be installed inside a slim fiber, and is bendable and densely installed to be applied to products, such as gloves and socks.