Tripods

Tripods

A tripod is a support structure with three legs that is used to hold a surveying instrument. It can come in different carrying capacities, materials, and configurations, such as single stage-one adjustable leg, two stage-two adjustable legs, or multistage telescopic. Additionally, it may come with various accessories.From: Illustrated Dictionary and Resource Directory of Environmental and Occupational Health [2019], National Association of Broadcasters Engineering Handbook [2019]

Site surveys, investigations and layout

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Purchase Book

Published in Alan C. Twort, J. Gordon Rees, Civil Engineering Project Management, 2007

Alan C. Twort, J. Gordon Rees

For most site survey work tilting or automatic levels provide for quick and accurate results. As with all instruments, they should be checked regularly for accuracy and returned to the manufacturer for overhaul and re-setting at intervals. The levelling staff must be kept clean and its markings clear to reduce reading errors and it is worth spending time to ensure the chainman is clear as to where the foot of the staff should be placed and that it is held vertically. The tripod must be in good condition, and set up so as to avoid movement during operations. Once fixed to the tripod the instrument must be levelled using the centre bubble to avoid excessive tilt of the telescope. For the tilting level the split view of the tubular level bubble must be adjusted to coincide for each reading while the compensation mechanism in the automatic level ensures that the sighting is in the horizontal plane. On-site checks on accuracy can be made using the two-peg test.

Trends in Robotic Systems for Lower Limb Rehabilitation

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Journal Information

Published in IETE Technical Review, 2023

M. H. Pérez-Bahena, P. A. Niño-Suarez, Oscar F. Avilés Sánchez, Rubén Hernández Beleño, Oscar I. Caldas, O.I. Pellico-Sánchez

The PAM consists of a body weight system, a treadmill, and pneumatic cylinders, the PAM can be divided into a pair of subrobots, each having three pneumatic cylinders arranged in a tripod configuration supported by a height-adjustable pillar via universal joints. Force sensors are attached to each end of the pneumatic cylinders, they can be detached and separated to make sufficient spacing for the entry of an individual in a wheelchair [3,15].

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