高灵敏度感应式运动传感器的研制

A. Perederko
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引用次数: 2

摘要

研究了一种短距离接触式感应位移传感器。一个铁氧体铁芯与一个绕组和一个活动电枢被用作传感器。铁芯和电枢之间有一个气隙。为了解决提高测量精度的问题,在桥式测量电路中加入传感器,采用高频交流电供电。为了提高所指示传感器对运动的灵敏度,提出了一种包含传感器的差分电路。此外,为了提高灵敏度,还采用了桥式测量电路的谐振工作方式。为了保持发电机的电压恒定,使用了锁相环。通过对感应式位移传感器的研究,获得了最大位移为±0.6 mm的实用结果。该传感器尚未对大位移进行研究,因为随着指示位移的增加,位移-电流变换出现非线性。在不使用锁相环的情况下,差分传感器在指定运动范围内的最大灵敏度为2.44 μA/μm。采用锁相环调频系统将灵敏度提高到3.48 μA/μm。在研究过程中,确定了传感器灵敏度对发电机频率的依赖关系,从而确定了测量电桥电路的最佳工频。研究表明,使用接触式电感式电表具有应用前景和改进空间。使用传感器的差分包含和谐振工作模式,在小位移时,主传感器的灵敏度显着提高。一种廉价的传感器已经被开发出来,它将对许多需要通过接触方法测量位移和线性尺寸的应用非常有用
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Development of a High Sensitive Inductive Movement Sensor
Research on a contact induction displacement sensor over short distances is presented. A ferrite core with a winding and a movable armature is used as a sensor. There is an air gap between the core and the armature. To solve the problem of improving the accuracy of measurement, the sensor is included in the bridge measuring circuit, which is powered by high-frequency alternating current. To increase the sensitivity of the indicated sensor to movement, a differential circuit for its inclusion is proposed. Also, in order to increase sensitivity, the resonant mode of operation of the bridge measurement circuit is used. To maintain a constant voltage of the power generator, a phase-locked loop is used. As a result of the study of the induction displacement sensor, practical results were obtained with a maximum displacement of ±0.6 mm. The sensor has not been studied for large displacements, since with an increase in the indicated displacement, the nonlinearity of the displacement-current transformation appears. The maximum sensitivity of the differential sensor in the indicated range of movement 2.44 μA/μm is obtained without the use of a phase-locked loop. The use of a phase-locked-loop frequency adjustment system increased the sensitivity to 3.48 μA/μm. During the study, the dependence of the sensitivity of the sensor on the frequency of the power generator was determined, which allows to determine the optimal power frequency of the measuring bridge circuit. Studies have shown that the use of contact inductive meters have the prospect of application and reserves for improvement. And the use of differential inclusion of the sensor and the resonant mode of operation gives a significant increase in the sensitivity of the primary transducer at small displacements. An inexpensive sensor has been developed that will be useful for many applications where it is necessary to measure displacements and linear dimensions by contact methods
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