标准摘要
[中文适用范围]： ISO 12858 的这一部分规定了大地测量中使用的三角基座对仪器主体与其底座连接的最重要要求。 然而，lSO 12858 这一部分的要求并不保证仪器主体与不同制造商的三角基座的完全互换性，而是给出了夹具系统的详细规格，以确保可靠的安装和夹紧，而不影响其性能和实用性。 。 目前使用的基座台主要有两种类型，在 ISO 12858 本部分中分为 W 型和 Z 型。 ISO 12858 本部分适用于水平仪、经纬仪、测距仪、GPS 设备、EDM 仪器及其组合使用的基座台带有目标、反射器、天线等 [外文原描述]： ISO 12858-3:2005 specifies the most important requirements of tribrachs used in geodesy for the connection of the instrument's body with its base. The requirements in ISO 12858-3:2005, however, do not guarantee the full interchangeability of the instrument's body with tribrachs of different manufacturers, but give the detailed specifications of the clamp system to ensure the reliable mounting and clamping without prejudicing their performance and their usefulness. There are mainly two types of tribrachs in use, categorized in ISO 12858-3:2005 as Types W and Z. ISO 12858-3:2005 is applicable to tribrachs which are used for levels, theodolites, tacheometers, GPS equipment, EDM instruments and in combination with targets, reflectors, antennae etc.
英文名称Optics and optical instruments — Ancillary devices for geodetic instruments — Part 3: Tribrachs