摘要
为了研究所设计的坡莫合金压磁式测力传感器的线性度和灵敏度特性,在不同预载荷、不同测力范围,不同励磁频率条件下对传感器进行了线性度和灵敏度实验分析与研究。传感器的线性度用工作曲线与实际工作曲线之间的最大偏差与满量程输出之比来表示。通过对升回程各节点输出值分别取均值对线性度进行标定。实验发现:传感器的线性度和灵敏度随预载的增加而提高,随最大载荷的增大而降低;励磁频率的降低使传感器的灵敏度得到提高;在相同的最大载荷作用下,励磁频率的降低可明显改善传感器的线性度。为了研究所设计的坡莫合金压磁式测力传感器的线性度和灵敏度特性,在不同预载荷、不同测力范围、不同励磁频率条件下对传感器进行了线性度和灵敏度实验分析与研究。传感器的线性度用工作曲线与实际工作曲线之间的最大偏差与满量程输出之比来表示。通过对升回程各节点输出值分别取均值对线性度进行标定。实验发现:传感器的线性度和灵敏度随预载的增加而提高,随最大载荷的增大而降低;励磁频率的降低使传感器的灵敏度得到提高;在相同的最大载荷作用下,励磁频率的降低可明显改善传感器的线性度。
To study the linearity and sensitivity of the permalloy force transducer, this paper does some experimental analyses and researches on the linearity and sensitivity characteristics of the designed permalloy magneto-elastic force transducer under the conditions of different pre-load, different load scope and different magnetism excitation frequency. It utilized the ratio of maximal error between theoretical working curve and the practical working curve to the full measurement range of the output to indicate the linearity of the sensor, choose the average output value of each rising and return node to demarcate the linearity of the sensor. The experiments proved that the linearity and sensitivity of the sensor would increase with the increase in pre-load, while decrease with the increase of the maximal load. The sensitivity of the sensor would increase with the decrease of the magnetism excitation fre- quency. An decrease in magnetism excitation frequency with a certain maximum load would improve the linearity of the sensor.
出处
《仪表技术与传感器》
CSCD
北大核心
2009年第9期15-17,共3页
Instrument Technique and Sensor
基金
国家自然科学基金(50775021)
关键词
压磁
力传感器
线性度
灵敏度
magnetoelastic
force transducer
linearity
sensitivity
