揭开了奥秘 - 一个古老的水时钟，带有激光扫描

Author: Reka Vasszi

发明som设备跟踪时间ething mankind experimented with for thousands of years before the first digital clocks were invented. Ancient civilisations observed astronomical objects, such as the sun or the moon to determine time, dates and seasons. Along with sundials, water clocks were among the first devices used for measuring time from the 16^Thcentury onwards.

与古老的水锁相比，建造了一个更复杂的液压锁房屋，该房屋建立在摩洛哥Fez的Medersa Bouanania，神学科学学院和会众清真寺。教育和宗教综合体是在1357年建造的，在苏丹·布伊丹（Sultan Bou Inan）的梅里尼德（Merinid）统治下，他委托液压 - 锁定祈祷的正确时期，向穆赞（Muezzin）传达正确的祈祷时间，穆赞（Muezzin清真寺。

Recently, the Medersa underwent a restoration project by the Agency of Development and Rehabilitation of the city of Fez (ADER-Fès). Together with local artisans, ADER-Fès, reconstructed the Medersa’s unique glazed earthenware mosaics and its fabulous wooden ceiling of carved cedar.

在3D激光扫描技术的帮助下，专家现在正在恢复神秘的体重动力液压时钟，当Saadian王朝取代Merinid统治者并将首都从FEZ转移到Marrakech时，该液压时钟停止工作。为了揭示水时钟内部机制的奥秘并完全恢复了它，FEZ的测量公司Geo Lambert的专家扫描了液压锁房屋的立面和内部，Leica BLK360成像激光扫描仪和Leica RTC3603D reality capture solution.

在狭窄地区进行测量

It is said that a magician created this elaborate hydraulic-powered clock that released metal balls from 12 little doors into brass bowls on the lower beams to chime out the five calls to prayer. This unique technical masterpiece, unfortunately, has not survived the centuries in its original condition.

To bring the clock to life again, Geo Lambert surveyors were requested to scan the clock, produce orthoimages and a 3D meshed model focusing on 2D elevations and cross-sections. Reaching the clock was challenging for the specialists, as it is located vertically on the wall of the Medersa. In addition, the façade has narrow archways where larger laser scanning equipment could not fit.

“BLK360使我有可能通过小尺寸和快速设置来调查时钟后面非常狭窄的大厅,” said Adam Bouramdane, senior surveyor at Geo Lambert.

To come across the challenges, Geo Lambert chose the portable and lightweight BLK360 to capture the clock in detail. Being the first company in the Maghreb to have acquired the BLK360 from leica's new selling unit in Morocco and with a large background in 3D scan, the surveying experts were able to scan the unique time keeping equipment and its environment in a day. To manage project complexities with accurate and reliable 3D representations, the team scanned the heritage building with the RTC360.

扫描最好的细节

清洁和注册捕获的数据后，该团队创建了历史时钟的3D模型，这将是未来研究和恢复的基础。

“The good point accuracy and density while being very lightweight and portable made the BLK360 and the RTC360 perfect for heritage surveying, especially in narrow areas,” said Raghib Mehdi, associate surveyor at Geo Lambert.

由于其体积小,易用性和准确性, Leica Geosystems’ laser scanning technology opens new horizons in heritage preservation, as in the case of the mysterious clock in Morocco.