公开(公告)号：KR1020020092130A

公开(公告)日：2002-12-11

申请号：KR1020010031035

申请日：2001-06-02

Applicant: 한국철도기술연구원

Inventor： 조용현 ,  최강윤 ,  현승호

IPC: G01L5/00

CPC classification number: G01L5/00

Abstract: PURPOSE: A method and apparatus for measuring contact force is provided to achieve improved accuracy and reduce costs by allowing contact force measurement to be performed without changing design of current collector. CONSTITUTION: A method for measuring contact force between current collector and trolley wire of motor car, comprises a first step of attaching four strain gauges at both ends of a current collector, such that Wheatstone bridge circuit is formed by using strain gauges, obtaining rate of change of bending strain of strain gauges, and obtaining shearing force affecting the cross section of the current collector by applying the obtained rate of change to the formula expressing the relation between the shearing force and bending moment; a second step of installing an accelerometer at the center of bottom surface of the current collector and at the position symmetrical to the center, obtaining a force equilibrium formula for the moment where the current collector is excited at the stopped state, obtaining equivalent mass for fan head through the transfer function of shearing force and transfer function of acceleration with respect to the excitation force, and obtaining inertial force by multiplying the equivalent mass with the signal of the accelerometer obtained during the measurement of contact force; and a third step of obtaining dynamic contact force by applying the shearing force obtained in the first step, equivalent mass obtained in the second step, acceleration measured during the measurement of contact force and aerodynamic force obtained from a wind tunnel test, to the equilibrium formula for forces acting to the current collector during travel of the motor.

Abstract translation: 目的：提供一种用于测量接触力的方法和装置，以通过允许在不改变集电器设计的情况下执行接触力测量来实现提高的精度并降低成本。 构成：用于测量电动车的集电器和电车线之间的接触力的方法，包括在集电器的两端连接四个应变计的第一步骤，通过使用应变仪形成惠斯登电桥电路，获得速率 通过将获得的变化率应用于表示剪切力和弯矩之间关系的公式，获得影响集电器横截面的剪切力; 第二步，在集电器底面的中心和与中心对称的位置处安装加速度计，得到集流器在停止状态下激发的时刻的力平衡公式，获得风扇等效质量 通过剪切力传递函数和相对于激励力的加速度传递函数，通过将等效质量与接触力测量中获得的加速度计的信号相乘获得惯性力; 以及第三步骤，通过施加在第一步骤中获得的剪切力，在第二步骤中获得的等效质量，在测量接触力期间测量的加速度和从风洞试验获得的空气动力学获得动态接触力至平衡式 用于在电动机行驶期间作用于集电器的力。

公开(公告)号：KR100404920B1

公开(公告)日：2003-11-07

申请号：KR1020010031035

申请日：2001-06-02

Applicant: 한국철도기술연구원

Inventor： 조용현 ,  최강윤 ,  현승호

IPC: G01L5/00

CPC classification number: G01L5/00

Abstract: Disclosed are a method and an apparatus for measuring contact force between a current collector of an electric train and electric train lines. The measuring method and apparatus can measure without any current collection device for measurement and minimze effects of noise under a large current and high voltage condition, in measuring contact force between the current collector of the electric train and the electric train line to measure a current collection performance.

Abstract translation: 本发明公开了一种用于测量电动列车的集电器与电力线列车之间的接触力的方法和装置。 该测量方法和装置可以测量没有用于测量的任何电流收集装置，并且在大电流和高电压条件下最小化噪声的影响，测量电动列车的集电器与电力列车线路之间的接触力以测量集电器 性能。