磁场传感器是测量机器零件和产品位置的无接触式和无磨损手段。现在，新一代的霍尔传感器正在使过程更加精确和不受干扰。
磁场传感器用于测量机器零件和产品的位置为零接触和零磨损 - 在现代汽车中，大约100个这样的传感器正在忙于监视安全皮带扣和门锁，注册踏板位置或用于ABS，EPS和发动机控制。它们具有成本效益且健壮，但是，这些常规传感器通常仅测量垂直于芯片表面的磁场的大小。在许多方面足够好，磁场测量仍然不精确并且容易受到干扰。迈克尔·哈克纳（Michael Hackner），博士。汉斯 - 彼得·霍伊（Hans-Peter Hohe）和博士。Fraunhofer综合电路IIS研究所的Markus Stahl offergeld对这些限制不满意。他们希望使用磁场传感器的优势进行精确的位置测量，因此他们着手开发3D霍尔传感器。
Manufactured using standard processes
“First we connected up several sensors on a chip in order to improve the measuring accuracy of the individual sensors,” says Markus Stahl-Offergeld. “Next we arranged several of these sensors to measure the three-dimensional magnetic field at one point. The result was our pixel cells.” And so a new generation of 3D Hall sensors was born, capable of measuring all three spatial axes of a magnetic field and calculating the exact position of an object. The sensor chip contains a designated sensor for each of the three magnetic axes. These sensors are placed together in the pixel cell and attain a resolution of just a few microteslas depending on the measurement speed. Tesla is the unit for magnetic flux density. Also integrated directly on the chip are the evaluation circuit and a coil, which enable self-testing and calibration. “In spite of its complexity, the HallinOne® magnetic sensor can be manufactured using standard processes of semiconductor technology – and that makes it cost-effective,” explains Dr.-Ing. Hans-Peter Hohe. For this global technological breakthrough, the three Fraunhofer IIS developers have been awarded a Joseph von Fraunhofer prize this year.
Long-term partnership
最早利用Hallinone®潜力的公司之一是来自德国南部Calw的Seuffer GmbH。早在2006年，它启动了一个传感器，该传感器可防止洗衣机在自旋循环期间摇摆并爬过地板。将磁铁连接到浴缸上，并将传感器连接到洗衣机的固定，不动的部分。取决于鼓中的洗涤量以及在自旋周期中分布的方式，浴缸也移动，因此也是磁铁。传感器测量该运动，评估数据并将其传输到洗衣机。如果鼓正在摇摆，它会短暂停止并摇动一点，以便更均匀地分配洗涤。Fraunhofer IIS和Seuffer目前正在开发无线窗口前哨，该窗口可检测窗口是打开还是封闭，并通过无线传感器网络与能量收集结合进行传输此信息。
“Our next goal is to develop a sensor for 5-axis position measurement,” says Michael Hackner. “This will allow us to detect more mechanical degrees of freedom simultaneously, including translatory and rotary movements by the magnet in all directions. It already works in laboratory tests, but the system still needs some adjustments before it is ready for real-life applications.” Such applications could include use in the control systems of computers, construction machines, robots and airplanes.
For more information visitwww.fraunhofer.de。
提交以下：能源管理 +收获，，，，M2M（机器到机器）
