论文标题
使用振动线产生的电压测量磁场
Measurement of magnetic fields using the voltage generated by a vibrating wire
论文作者
论文摘要
振动线可以用作具有多种应用的仪器，其中之一是磁场的测量。通常，磁场是通过在洛伦兹力的作用下测量电线振动幅度来确定的。尽管通常是足够的，但在某些情况下，这种方法可能不便。当有必要测量高频振动的幅度时，就会发生其中之一，因为预计幅度将随着频率线性降低，因此很难测量。在传感器必须在各种振动频率上运行的情况下，可以找到另一个示例。在这种情况下，传感器将对电线振动的特定频率无反应，这些频率由传感器的放置确定。这意味着要使仪器保持稳定，必须精确地使用传感器，否则必须使用多个传感器。 这里描述了一种可用于补充位移传感器的技术。该技术利用在测量下磁场中电线在磁场中产生的电压。可以预测，该技术可能更适合需要高频振动的测量值，并且对所有振动频率都敏感。将使用此技术获得的磁场的测量与仅使用位移传感器发现的磁场进行了比较，并讨论了该技术的益处和缺点。
A vibrating wire may be used as an instrument with a variety of applications, one of which is the measurement of magnetic fields. Often, the magnetic fields are determined by measuring the amplitude of the wire vibration under the action of a Lorentz force. Though generally adequate, this approach may be inconvenient in certain circumstances. One of these occurs when it is necessary to measure the amplitude of high-frequency vibration, as the amplitude is expected to decrease linearly with frequency, and thus becomes harder to measure. Another example may be found in situations where the sensor must operate over a wide range of vibration frequencies. In this case the sensor will be unresponsive to specific frequencies of wire vibration, which are determined by the placement of the sensor. This means that for the instrument to be robust, the sensor must be precisely mobile, or multiple sensors must be used. Here a technique which may be used to supplement the displacement sensor is described. This technique makes use of the voltage generated by the motion of the wire in the magnetic field under measurement. It is predicted that the technique may be more suitable for measurements requiring high frequency vibration, and is sensitive to all frequencies of vibration. Measurements of a magnetic field obtained using this technique are compared to those found using only a displacement sensor, and the benefits and drawbacks of the technique are discussed.
