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Vol. 155, Issue 8, August 2013, pp. 214-221

 

Bullet

 

An Investigation on Test Signal Transmission at Temperature Changing Environment
 
1 Men Xiuhua, 1 Shao Haiyan, 2 Liu Baojian, 1 Li Yingjun, 1 Fu Xiuli

1 School of Mechanical Engineering, University of Jinan, Jinan, 250022, China

2 Saic-Iveco Hongyan Commercial Vehicle Co. Ltd, Chongqing, 401122, China

1 Tel.: +8615562516593
E-mail: me_menxh@ujn.edu.cn

 

Received: 20 May 2013   /Accepted: 12 August 2013   /Published: 20 August 2013

Digital Sensors and Sensor Sysstems

 

Abstract: In vibration test, the signal transmission is affected significantly by high ambient temperature. The basis of on traditional transmission theory, the telegraph operator equation is satisfied for analyzing signal feature. When ambient temperature increases from low to high, transmission parameters RLCG change correspondingly. Considering circuit feature of signal transmission, Kirchhoff's Law is applied to establish a discrete temperature-time signal transmission model. And the FDTD method is applied to give a new iterative algorithm for achieving the solution of voltage u\and current. The signal transmissions with different temperature changing process are realized using above simulation. The results show that the amplitude of output signal is gradually attenuate with the rise of conductor temperature. Compared with amplitude at 30 0C, the attenuate degree comes to 10 % at 300 0C. The amplitude attenuation is more evident due to the coexistence of temperature rise and drop. The corresponding experiment has been conducted and the results can meet that of proposed model. It provides a new method for improving the accuracy of vibration test signal.

 

Keywords: Vibration test, Signal transmission, Temperature changing environment, FDTD, Temperature gradient, Signal amplitude.

 

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