| 振弦式传感器激振策略优化 |
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| 引用本文： | 贺虎,王万顺,田冬成,孙建会,熊成林.振弦式传感器激振策略优化[J].传感技术学报,2010,23(1):74-77. |
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| 作者姓名： | 贺虎 王万顺 田冬成 孙建会 熊成林 |
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| 作者单位： | 中国水利水电科学研究院,北京,100038;中国水利水电科学研究院,北京,100038;中国水利水电科学研究院,北京,100038;中国水利水电科学研究院,北京,100038;中国水利水电科学研究院,北京,100038 |
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| 基金项目： | 中国水科院科研专项资金资助(信息平台建设及系统开发,GJ0827;水工建筑物安全监控预警方法及监测系统体系研究,GJ0916) |
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| 摘 要： | 振弦式传感器的激励常用高压拨弦激振和低压扫频激振两种方式。高压拨弦激振对传感器损伤较大,信号衰减快,测量精度差;低压扫频激振扫描时间长,信号不宜拾取。提出一种反馈式低压激振方法,降低拨弦激振电压对传感器进行预激振,将反馈的振动频率信号作为输出,对传感器进行复振,可以在很短时间内使振弦达到共振状态。设计专用检测电路对调优后的激振策略进行验证,证明该方法激振时间短,共振幅度大。振动幅度的提高可增强抗干扰能力、降低信号处理电路成本、增加可用测量时间、提高频率测量精度。
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| 关 键 词： | 振弦式传感器 低压激振 反馈 扫频 共振 测频 |
Optimization of Vibrating Wire Sensor Excitation Strategy |
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| HE Hu,WANG Wanshun,TIAN Dongcheng,SUN Jianhui,XIONG Chenglin.Optimization of Vibrating Wire Sensor Excitation Strategy[J].Journal of Transduction Technology,2010,23(1):74-77. |
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| Authors: | HE Hu WANG Wanshun TIAN Dongcheng SUN Jianhui XIONG Chenglin |
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| Affiliation: | China Institute of Water Resources and Hydropower Research;Beijing 100038;China |
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| Abstract: | Vibrating wire sensor commonly used high-voltage plucked excitation or low-voltage scanning frequency excitation.High-voltage plucked excitation had large damage to sensor,with rapid decayed signal and low measurement accuracy;Low-voltage scanning excitation needed to sweep a long time and hard to pick up the signal.This paper presents a low-voltage excitation with feedback method.By pre-excitations,the vibration frequency of the sensor can be got to used as the output of the driver.The feedback signal freq... |
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| Keywords: | vibrating wire sensor low-voltage excitation feedback scanning frequency resonance frequencymeasurement |
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