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Hall angle/position sensor

A technology of sensors and angles, applied in angle/taper measurement, instruments, measuring devices, etc., can solve the problems of the influence of sensor measurement accuracy, achieve the effect of reducing hysteresis influence, high-precision measurement requirements, and improving linearity

Inactive Publication Date: 2012-07-11
LIANCHUANG AUTOMOBILE ELECTRONICS
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Problems solved by technology

But in fact, this linear region is not an "ideal straight line", which will affect the measurement accuracy of the sensor; at the same time, because there is relative motion (rotation) between the permanent magnet and the soft magnetic material device, there will be hysteresis. The appearance of hysteresis has a certain impact on the measurement accuracy of the sensor

Method used

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Embodiment Construction

[0015] The attached figure is the digital value of the magnetic field (DA Readout) measured by the Hall chip of the Hall-type angle / position sensor, and the range is 0-16382 digital values, where 0 (indicates -50mt) and 16382 (indicates 50mt) respectively represent The maximum value of the reverse magnetic field strength -Bmax and the maximum value of the positive magnetic field strength +Bmax, the two magnetic field strengths are equal in value and opposite in direction, and the middle value 8191 represents 0 magnetic field (0mt). The value between 0-16382 represents the value of the magnetic field strength, but it is not a direct value, but a value after conversion and digitization. The curve in the figure does not see a point reaching 0 or 16382, because the maximum magnetic field strength does not reach + / -50mt (millitesla), here 0 and 16382 can use + / -50mt, and can also be used in other similar products Other values, such as + / -30mt and so on.

[0016] It can be seen fro...

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Abstract

The invention discloses a Hall angle / position sensor which comprises a rotor core and a stator core, wherein the rotor core consists of a permanent magnet and a soft magnetic material device and is driven by an external executor to rotate through a mechanical structure; the stator core consists of three soft magnetic material devices; two soft magnetic material devices are provided with parallel polar plate structures; and a Hall chip is mounted between the parallel polar plates of the soft magnetic material devices in the stator core. Through the invention, the linearity of the Hall angle / position sensor can be increased, and the hysteresis performance can be improved.

Description

technical field [0001] The invention relates to a Hall type angle / position sensor. Background technique [0002] Hall-type angle / position sensors have solid-state Hall effect technology, integrated reverse protection, short-circuit protection, EMC (electromagnetic compatibility) protection, large measurable range, 360-degree free rotation space, and strong packaging with connectors, etc. , has a long working life, can greatly reduce mechanical wear, has a wide working angle and over-travel, and can be used in harsh environments. [0003] Hall angle / position sensors usually include Hall IC (integrated circuit) and signal conditioning, protection circuits, permanent magnets and soft magnetic material devices, which change the magnetic field strength at the Hall effect detection point through the rotation of the external actuator, and reflect the rotation linearly Angle changes. [0004] Hall-type angle / position sensors can be ideally used in fields such as trucks, land trans...

Claims

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Application Information

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IPC IPC(8): G01B5/00G01B5/24
Inventor 冯明陆江黄波汤则萱汪根养
Owner LIANCHUANG AUTOMOBILE ELECTRONICS
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