In this article, a system to measure the evolution of load in time and space during indoor climbing is described. The system is based on a set of dedicated multiaxial load cells, which measure the load on each hold of an indoor climbing wall. When the climber hangs on a hold, the load signal is read and sent to a digital acquisition and processing system. Sensor design allows for measurement of the force components applied to the climbing holds, regardless of the application point of the force on the hold. Local deformations were measured through strain gauges. Based on the electrical configuration of the strain gauges, the values of the applied forces can be computed, making the contributions to the deformation due to bending moments and torsion negligible. The sensor was designed, assuming a maximum applicable load of 200 kg without plastic deformation. The design process was based on both analytical and finite element method analyses. An experimental calibration and testing campaign was performed to validate the sensor design.

中文翻译：

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用于室内攀爬支架的创新力传感器——实时测量和数据处理、设计和验证

在本文中，描述了一种用于测量室内攀爬过程中负载在时间和空间上的演变的系统。该系统基于一组专用的多轴称重传感器，可测量室内攀岩墙每个支架上的负载。当攀登者悬空时，负载信号被读取并发送到数字采集和处理系统。传感器设计允许测量施加到攀爬货舱的力分量，而不管货舱上的力的施加点如何。通过应变仪测量局部变形。根据应变片的电气配置，可以计算施加的力的值，从而可以忽略弯矩和扭转对变形的影响。传感器被设计为，假设最大适用载荷为 200 kg，无塑性变形。设计过程基于分析和有限元方法分析。进行了实验校准和测试活动以验证传感器设计。