Magnetic sensors and electronic compass using the same
A magnetic field sensor and electronic compass technology, applied in the direction of the size/direction of the magnetic field, compass, instruments, etc., can solve the problems of inconsistent yaw angle, high cost, low sensitivity, etc.
Inactive Publication Date: 2015-06-10
宇能电(开曼)科技股份有限公司
View PDF3 Cites 5 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] However, in current magnetic field sensors, measuring the magnetic field component along the Z axis is often less sensitive than measuring the magnetic field component along the X axis and the magnetic field component along the Y axis
In this way, the measured magnetic field component along the Z axis will be different from the actual magnetic field component, which may cause errors when estimating the yaw angle of the electronic compass. The yaw angle does not match the actual yaw angle
In order to solve such problems, those skilled in the art often improve the sensitivity of the magnetic field sensor on the Z-axis by improving the manufacturing process of the magnetic field sensor, but the improvement of the manufacturing process is often accompanied by higher costs.
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
[0016] What the present invention discusses here is an electronic compass, which includes a magnetic field sensor, which can sense the Z-axis magnetic field perpendicular to the substrate surface and the X-axis and Y-axis magnetic fields parallel to the substrate surface, and can include Other structures commonly used in sensing devices include: setting and resetting circuits; various circuits for amplifying signals, filtering signals, and converting signals; shielding structures for shielding unwanted electromagnetic interference, etc. In order to describe the present invention thoroughly and clearly without blurring the focus of the present invention, these commonly used structures are not introduced, but the magnetic field sensor in the electronic compass of the present invention may optionally include these commonly used structures.
[0017] Preferred embodiments of the present invention will be described in detail below, and all devices, modules, components, component sub-...
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 magnetic sensor and the electronic compass using the same are provided. The magnetic sensor is configured to sense magnetic components along each axis of a first reference coordinate system, and the first reference coordinate system is associated with the magnetic sensors. When a sensitivity of the magnetic sensor for an axis A of the first reference coordinate system is different from a sensitivity for another axis, the magnetic component Am along the axis A is corrected using the following equation: Am=Am(n−1)×(Wa−1) / Wa+Am(n)×1 / Wa (A) Therefore, Am(n) designates a current measured magnetic component along the axis A, Am(n−1) designates a previous measured or calculated magnetic component along the axis A, and Wa is a weight value.
Description
technical field [0001] The invention relates to a magnetic field sensor and an electronic compass using the magnetic field sensor, in particular to a magnetic field sensor and an electronic compass capable of obtaining more accurate results at a lower cost. Background technique [0002] With the development of MEMS technology, the use of electronic compass has become more and more common, especially in recent years with the popularization of smart phones, the application of electronic compass has become more and more diverse. [0003] Currently, electronic compasses on the market generally include an acceleration sensor (G sensor) and a magnetic field sensor (Magnetic sensor). Wherein, the acceleration sensor can sense the acceleration components of the electronic compass on the X axis, the Y axis, and the Z axis, and the magnetic field sensor is used to sense the magnetic field components of the electronic compass on the X axis, the Y axis, and the Z axis. The pitch angle,...
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 Applications(China)
IPC IPC(8): G01C17/32
CPCG01C17/32G01R33/0206G01C17/38G01P15/18
Inventor 汤泰郎林政治黄弘育
Owner 宇能电(开曼)科技股份有限公司