Magnetic Sensing Apparatus And Magnetic Sensing Method Thereof

A technology for magnetic field sensing and magnetic field sensing signals, which is applied to measurement devices, magnetic field size/direction, magnetic field offset compensation, etc. Effect

Active Publication Date: 2016-07-13
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

At present, if the sensitivity of the magnetic field sensor is to be solved, multiple sets of magnetic induction probes will be configured for the magnetic field sensor to measure the external magnetic field at the same time, which may result in high cost and matching between multiple sets of magnetic induction probes; if by If the back-end signal processing circuit corrects the sensing results, it may take more signal processing time in exchange for precision

Method used

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  • Magnetic Sensing Apparatus And Magnetic Sensing Method Thereof
  • Magnetic Sensing Apparatus And Magnetic Sensing Method Thereof
  • Magnetic Sensing Apparatus And Magnetic Sensing Method Thereof

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Embodiment Construction

[0044] figure 1 A schematic circuit block diagram of a magnetic field sensing device according to an embodiment of the present disclosure is shown. Please refer to figure 1 , the magnetic field sensing device 100 of this embodiment includes a magnetic field sensing unit 110 , a frequency generating unit 120 , a reference magnetic field generating unit 130 , a signal processing unit 140 and a calibration unit 150 . In this embodiment, the reference magnetic field generating unit 130 provides the reference magnetic field Bref. The magnetic field sensing unit 110 senses an external magnetic field Bext and a reference magnetic field Bref to provide a magnetic field sensing signal Smf. The signal processing unit 140 is coupled to the magnetic field sensing unit 110 to receive the magnetic field sensing signal Smf and convert it into an output signal Vo. The calibration unit 150 is coupled to the signal processing unit 140 for calibrating the output signal Vo according to the mag...

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Abstract

A magnetic sensing apparatus and a magnetic sensing method thereof are provided. The magnetic sensing apparatus includes a reference magnetic field (MF) generating unit, a MF sensing unit, a signal processing unit, a calibration unit and a frequency generating unit. The MF sensing unit senses an external MF and a reference MF to provide a MF sensing signal. The signal processing unit receives and transfers the MF sensing signal into an output signal. The calibration unit calibrates the output signal according to the MF sensing signal. The frequency generating unit provides an operating frequency. The reference MF generating unit provides the reference MF according to the operating frequency, and the MF sensing unit senses the external MF and the reference MF according to the operating frequency.

Description

technical field [0001] The disclosure relates to a sensing device, and in particular to a magnetic field sensing device and a magnetic field sensing method thereof. Background technique [0002] The magnetic sensor has been widely used in vehicle body, industrial and consumer electronics, and it can sense the disturbance of the magnetic field to generate an output voltage. Magnetic field sensors are often used in non-contact non-destructive sensing, such as sensing physical parameters such as speed, position, angle, etc. of magnetic field objects (eg, motors), so that the control system can use these physical parameters to dynamically control the magnetic field objects. Magnetic field sensors can be used in vehicles such as engines, crankshafts, tires, windows, etc., industrial current sensing, robot motion control, or automatic zoom technology for cameras. [0003] Because the magnetic field sensor is easily affected by the environment, for example, under extremely harsh e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/02
CPCG01R33/0017G01R33/0035
Inventor 张元泰庄凯翔
Owner IND TECH RES INST
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