th.2023.02.016]
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动态秤安装环境振动测试与隔振系统设计

《工业仪表与自动化装置》[ISSN:1000-0682/CN:61-1121/TH]

Title:: Ambient vibration testing and vibration isolation system design of dynamic scale

Author(s):: LI Houxin; CAO Chao; ZHAO Peng; AVIC Zhonghang Electronic measuring instruments Co., Ltd.,Shaanxi Xi’an, 710117, China

Keywords:: dynamic scale; dynamical model; weighing precision; vibration isolator

摘要:: 动态秤是现代智慧物流的关键设备，能够在分拣包裹或货物的同时对它们进行动态称重。因节约空间和物流产线功能实现的需求，物流分拣线中的动态秤多与传送模块一同安装在单层或多层钢架平台上。传送电机在启动和服役过程中会不可避免地产生振动，振动通过钢架平台传递至动态秤，严重影响动态秤的称重精度，降低动态秤的工作效率。该文详细阐述了物流分拣线中动态秤支脚处安装环境振动的测试方法，分析了振动频谱信息；针对现场测试的振动信号，创新设计了动态秤隔振系统，建立了动态秤-隔振系统二自由度振动数学模型，并获得了动态秤称重传感器相对位移响应的幅频响应关系，评估了隔振系统对钢架平台振动的隔振效果，发展了动态秤安装环境振动控制方法。该文为控制环境振动对动态秤的影响，提高动态秤的称重精度和运行效率提供了理论基础和技术支持。

Abstract:: Dynamic scale is a key equipment of the wisdom logistics,which could weigh andsort parcels or merchandises simultaneously.Since the demand of space saving and function reali-zation of the production line, the dynamic scale within the production line is mounted on sole layer or multi layers steel platform together with the transmission module.During the operation of the transmission module, the transmission motor could give rise to vibration that propagates along the steel platform and reduces the weighing precision of the dynamic scale.The paper ex-pounds measurement methods about the ambient vibration of the dynamic scale, following by a detailed analysis for the frequency spectrum of the measured signal.A vibration isolation system is devised for the purpose of attenuating the vibration propagation and improving the weighing precision of the dynamic scale.The mathematical model of the two-DoF system is established, and the amplitude-frequency relationship of the relative dynamic response is derived. The vibration isolation performance of the isolator is evaluated as well through solving the equation of motion excited by the measured signal.This paper provides theoretical basis and technical support for controlling the influence of environmental vibration on dynamic scale and improving the weighing accuracy and operation efficiency of dynamic scale.

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