PNI’s geomagnetic sensor technology provides high resolution, low power consumption, large

signal noise immunity, a large dynamic range, and high sampling rates. Measurements are stable

over temperature and inherently free from offset drift. The RM3100’s MagI2C ASIC features

both continuous measurement mode and single measurement polling, software-configurable

resolution and sample rate, and the ability to operate one, two, or three PNI sensor coils. And it

incorporates both I2C and SPI interfaces for system design flexibility.

  PNI的地磁传感器技术提供高分辨率，低功耗，大信号噪声抗扰度，大动态范围和高采样率。 测量结果稳定

温度过高，固有地没有偏移漂移。 RM3100的MagI2C ASIC功能连续测量模式和单一测量轮询，软件可配置

分辨率和采样率，以及操作一个，两个或三个PNI传感器线圈的能力。 它集成了I2C和SPI接口，可实现系统设计灵活性。

  When implementing an RM3100 or RM2100 Geomagnetic Sensor, each sensor coil serves as the

inductive element in a simple LR relaxation oscillation circuit, where the coil’s effective

inductance is proportional to the magnetic field parallel to the sensor axis. The LR circuit is

driven by the MagI2C ASIC, and the MagI2C’s internal clock is used to measure the circuit’s

oscillation frequency, and hence the magnetic field. Since PNI’s Geomagnetic Sensor works in

the frequency domain, resolution and noise are established cleanly by the number of MagI2C

internal clock counts (cycle counts). In comparison, fluxgate and MR technologies require

expensive and complex signal processing to obtain similar resolution and noise, and in many

respects the geomagnetic sensor’s performance simply cannot be matched. Also, the output from

the MagI2C is inherently digital and can be fed directly into a microprocessor, eliminating the

need for signal conditioning or an analog/digital interface between the sensor and a

microprocessor. The simplicity of PNI’s geomagnetic sensor combined with the lack of signal

conditioning makes it easier and less expensive to implement than alternative fluxgate or

magneto-resistive (MR) technologies.

 当实施RM3100或RM2100地磁传感器时，每个传感器线圈用作电感元件在简单的LR弛豫振荡电路中，其中线圈有效电感与平行于传感器轴的磁场成比例。 LR电路是由MagI2C ASIC驱动，MagI2C的内部时钟用于测量电路

振荡频率，因此是磁场。自PNI的地磁传感器工作以来通过MagI2C的数量可以清楚地确定频域，分辨率和噪声

内部时钟计数（循环计数）。相比之下，磁通门和MR技术需要昂贵而复杂的信号处理以获得类似的分辨率和噪声，并且在很多方面尊重地磁传感器的性能根本无法匹敌。另外，输出来自MagI2C本质上是数字的，可以直接送入微处理器，从而消除了需要信号调理或传感器和a之间的模拟/数字接口微处理器。 PNI的地磁传感器简单，缺乏信号调节使其比替代磁通门更容易，更便宜磁阻（MR）技术。

 

型号：RM3100

类型：套件

测量范围：±800uT

分辩率：26nT

线性度：0.50%

供电电源：3V

工作电流：50mA

工作温度：-40~+85℃

通信接口：SPI、I2C

尺寸：N/A

供电电源：3VDC

  RM3100磁传感器套件是由2个X/Y轴磁传感器Sen-XY-f(13104)，1个Z轴磁传感器Sen-Z-f(13101)和1个ASIC控制器MagI2C(13156)组成。10倍于霍尔传感器的分辨率和低于20倍的噪音，使得RM3100成为了同类产品中性能的磁传感器，保证了航向和方位测量的性。基于磁感技术的PNI传感器不仅具备超低噪音下的高分辨率和重复性数据输出，而且采样率高、无磁滞现象，也不需要进行温度校准。