Angular orientation sensor based on Hall effect and corresponding method and device
A Hall effect, sensor technology, applied in the field of angular orientation sensors, can solve the problems of expensive manufacturing of special Hall devices and long measurement time.
Active Publication Date: 2018-07-13
MPS TECH SWITZERLAND
View PDF11 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The special Hall device required is relatively expensive to manufacture and takes a relatively long time to measure
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0223] figure 1 Shows a schematic block diagram of a sensor 1 for sensing the angular orientation of a magnet generating a magnetic field comprising a component Bz along a coordinate z perpendicular to the drawing plane, wherein said angular orientation is described by the angle α. The sensor consists of four Hall effect devices HD1, HD2, HD3, HD4. The devices HD1 , HD2 , HD3 , HD4 are Hall plate devices whose respective detection directions extend along the z-coordinate. The devices HD1, HD2, HD3, HD4 are arranged in a common plane, on a circle, and each have two pairs of connectors. To sense angular orientation, a bias current is applied to the device via one pair of connectors, and the resulting Hall voltage is detected via the other pair of connectors.
[0224] The devices HD1 , HD2 , HD3 , HD4 are operatively coupled to a wiring unit W controlled by a control unit L . The wiring unit W applies a wiring map to the devices HD1, HD2, HD3, HD4, which determines which of th...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
A sensor for sensing the angular orientation of a magnet generating a magnetic field comprises: -N ≥ 2 Hall effect devices (HD1, HD2, ...), each Hall effect device having a detection direction and comprising a first and a second pair of connections device, wherein in the presence of said magnetic field, the flow of current between said first pair of connectors allows to pick up a Hall voltage between said second pair of connectors induced by said magnetic field, unless said The magnetic field component of said magnetic field along said detection direction is zero, wherein said N Hall effect devices are aligned such that they have a common detection direction extending along an axis; a filtering or resonant unit (F) comprising an input and output terminals, wherein the signal output from said output terminal is referred to as a filtered signal; - a wiring unit (W), which is operatively connected to the corresponding second of each of said N Hall effect devices a pair of connectors constructed and arranged to selectively operatively connect a second pair of connectors to said input of said filtering or resonating unit in a particular wiring; - a control unit (L) constructed and arranged to controlling said wiring unit such that during a first time period of duration Tf and in a fixed sequence of said N Hall effect devices each of said N Hall effect devices uses its second pair of connections an output unit (4), which is operatively connected to said input of said filtering or resonating unit, constructed and arranged to receive from a filter Obtain an output signal related to the angular orientation and output the output signal; wherein the filter or resonance unit (F) is constructed and configured like a bandpass filter with a fundamental frequency of f=1 / Tf.
Description
technical field [0001] The invention relates to the field of sensing the angular orientation of a magnetic field by means of the Hall effect. In particular, the invention relates to a sensor for sensing the angular orientation of a magnet generating a magnetic field, and as such, the rotational speed or relative magnitude is also available. Corresponding devices find application in many fields, for example in position sensing and in rotational speed measurement, for example in electric motors, and in the automotive and aircraft industry. Background technique [0002] Several ways of using the Hall effect to determine the angular orientation of a magnetic field are known in the current state of the art. In many cases it is sufficient to be limited to an orientation in a plane or on an axis, ie to determine the angular orientation of the projection of the magnetic field in that plane and on that axis, respectively. [0003] For example, it is known to use two Hall devices ar...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01D5/14
CPCG01D5/145
Inventor S·瑞伊蒙德P·凯吉克
Owner MPS TECH SWITZERLAND