Disclosed is a method for estimating the tension of a tension member (1), the method comprising the steps of exciting the tension member (1) such as to induce vibration of the tension member (1), sampling the vibration to obtain a first vibration signal (VS1), modifying the mass and/or the rotational inertia of the tension member (1) such as to provide a modified tension member (1a), exciting the modified tension member (1a) such as to induce vibration of the modified tension member (1a), sampling the vibration of the modified tension member to obtain a second vibration signal (VS2), and estimating the tension of the tension member based on a comparison of the first vibration signal (VS1) and the second vibration signal (VS2). Disclosed is also a system for estimating the tension of a tension member.

A hub carrier is provided having: a central part for carrying a hub for a wheel of a vehicle; an outer frame adapted to connect the hub carrier to a suspension of the vehicle; at least three spokes interposed between the central part and the outer frame, the at least three spokes being rigidly connected to the central part. The at least three spokes have respective end elements connected to the outer frame and provide respective sliding spherical hinges for the at least three spokes. The hub carrier further includes at least three sensors configured for detecting force and/or moment components acting on the hub.

A hub carrier is provided having: a central part for carrying a hub for a wheel of a vehicle; an outer frame adapted to connect the hub carrier to a suspension of the vehicle; at least three spokes interposed between the central part and the outer frame, the at least three spokes being rigidly connected to the central part. The at least three spokes have respective end elements connected to the outer frame and provide respective sliding spherical hinges for the at least three spokes. The hub carrier further includes at least three sensors configured for detecting force and/or moment components acting on the hub.

A system and method include a gauge device and one or more of a communication device or a pulling assembly. The gauge device may be configured to send a message to display on one or more of the communication device or pulling assembly. Additionally or alternatively, the gauge device may be configured to send the message to be processed by pulling assembly to determine and perform a pull action. Additionally or alternatively, the gauge device may be configured to send the message to be executed by the pulling assembly to perform a pull action.

A damage identification method based on cable force tests of a cable system and test error self-adaptive analysis is proposed to measure cable forces in prestressed steel structures and find out possible damage positions of the cable system. The method includes placing a laser velocimeter; measuring the vibration speed history data of the measuring point P on the cable by the laser velocimeter; calculating the cable force; calculating all the cable forces of the cable system through the same procedure; analyzing error between cables and finding out the possible damage of the cable or of the tie rod connected to the cable. The dynamic response characteristics of both in-plane and out-of-plane of a cable can be obtained through the method of the present invention. The self-verified more accurate results can be obtained, and the damage in a cable system can be determined according to error self-adaptive analysis.

A pressure sensor for a pipe includes: a flexible strip; at least one strain sensing element; and a tensioning device. A first end of the flexible strip passes through a second end of the flexible strip. Between the first end of the flexible strip and the second end of the flexible strip, the flexible strip includes the at least one strain sensing element. The pressure sensor is attachable to the pipe. The first end of the flexible strip extends through or past the second end of the flexible strip. The tensioning device tensions the pressure sensor around the pipe.

A pressure sensor for a pipe includes: a flexible strip; at least one strain sensing element; and a tensioning device. A first end of the flexible strip passes through a second end of the flexible strip. Between the first end of the flexible strip and the second end of the flexible strip, the flexible strip includes the at least one strain sensing element. The pressure sensor is attachable to the pipe. The first end of the flexible strip extends through or past the second end of the flexible strip. The tensioning device tensions the pressure sensor around the pipe.

A method for monitoring operation of an archery bow includes attaching an apparatus to a bow cord. The apparatus includes a processor, a monitoring device electrically coupled with the processor, a wireless communication module electrically coupled with the processor, and a power supply electrically coupled with each of the processor and the wireless communication module. The method further includes detecting, by the monitoring device, a tension of the bow cord. The method also includes generating, by the processor and based upon the detected tension of the bow cord, data concerning tension of the bow cord. The method further includes wirelessly transmitting, by the wireless communication module, the data to a remote computing device. The method also includes receiving, by the remote computing device, the data. The method also includes presenting, by the remote computing device and based upon the data, information to a user reflecting the detected tension.

A tensioning device includes a housing, a drive member, an inner sleeve and a driven member. The housing includes a first attachment feature. The driven member includes a second attachment feature. The inner sleeve is disposed at least partially in the housing and is rotatably coupled with the housing. The drive member is rotatably coupled with the housing and is operably coupled with the inner sleeve such that rotation of the drive member facilitates rotation of the inner sleeve. The driven member is movable with respect to the guide member between a retracted position and an extended position along a centerline.

A method and apparatus for calculating line sag in a span of a conductor is provided. The method includes using a portable smart device having one or more accelerometers and running a line sag application on the processing device. The line sag application enables acceleration data of return waves generated on the conductor to be collected using the smart device and to be plotted as a function of time for display on the smart device. The method further includes placement of time markers on the plotted data displayed on the smart device to determine elapsed time and calculating line sag using the elapsed time.