A Posture Recognition System Based on Alternating Magnetic Field
An alternating magnetic field and identification system technology, applied in the electromagnetic field, can solve the problems such as the high price of the AC magnetic attitude recognition system and the increase of the cost of the three-axis magnetic field generator, and achieve the effects of high cost, fast attitude recognition, and stable magnetic field frequency.
Active Publication Date: 2022-05-17
BEIJING HUAHANG RADIO MEASUREMENT & RES INST
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Problems solved by technology
[0005] The traditional three-axis magnetic field generator is one of the root causes of the high price of the AC magnetic attitude recognition system, because the transmitter skeleton structure of the three-axis magnetic field generator is made of special materials and proprietary processes
The AC drive of the three-axis magnetic field generator requires the drive circuit to be able to provide a large drive current at a relatively high frequency, so that the system power supply can continue to provide continuous high-power output capability, which increases the cost of the three-axis magnetic field generator
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[0050] Preferred embodiments of the present invention will be specifically described below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the application and are used together with the embodiments of the present invention to explain the principles of the present invention.
[0051] This embodiment discloses a posture recognition system based on an alternating magnetic field, such as figure 1 As shown, including three-axis alternating magnetic field generator, control unit and magnetic field calibration unit;
[0052] The three-axis alternating magnetic field generator is connected to the control unit, and under the control of the control unit, generates a time-division multiplexed, three-axis orthogonal local alternating magnetic field; and feedbacks and outputs the magnetic field drive current of each axis monitored to the control unit;
[0053] The control unit, according to the built-in parameters including magnetic fi...
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Abstract
The invention relates to an attitude recognition system based on an alternating magnetic field, which includes a three-axis alternating magnetic field generator, a control unit and a magnetic field verification unit; the three-axis alternating magnetic field generator is connected with the control unit, and under the control of the control unit, generates Time-division multiplexed, three-axis orthogonal local alternating magnetic field; and the monitored magnetic field driving current of each axis is fed back to the control unit; the control unit outputs the frequency, intensity and channel of the local alternating magnetic field according to the internal parameters Switch the control signal to the three-axis alternating magnetic field generator; and adjust the intensity of the local alternating magnetic field according to the feedback of the magnetic field drive current; during calibration, the magnetic field calibration unit is placed in the preset calibration area, and the local alternating magnetic field After the magnetic field is received, amplified, filtered and sampled, the sampling signal is output to the control unit, and the built-in parameters in the control unit are checked. The invention realizes the accuracy and stability of the frequency and intensity of the output alternating magnetic field.
Description
technical field [0001] The invention belongs to the field of electromagnetic technology, and in particular relates to an attitude recognition system based on an alternating magnetic field. Background technique [0002] In a classic AC magnetic attitude recognition system, there are usually four basic components: a three-axis magnetic field generator, a three-axis magnetic field sensor, a system main control unit and a power supply module. In a classic AC magnetic attitude recognition system, three quadrature coils are driven to provide a coupled magnetic field similar to that of the three-axis quadrature coils. The main control unit of the system senses the spatial magnetic field through a three-axis magnetic field sensor and performs calculations to display the attitude of the sensor relative to the magnetic field generator. [0003] In a typical single-sensor AC magnetic attitude recognition system, the three-axis magnetic field generator generates a three-dimensional AC ...
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IPC IPC(8): G05F7/00
CPCG05F7/00Y02A90/30
Inventor 钱宇赵川云峰
Owner BEIJING HUAHANG RADIO MEASUREMENT & RES INST