Noise detection device and noise detection method of orthogonally fundamental-mode flux gate sensor
A fluxgate sensor, noise detection technology, applied in measurement devices, noise figure or signal-to-noise ratio measurement, and electrical devices, etc., can solve the problem of poor noise optimization design effect, and can not independently evaluate the noise contribution of probes and signal processing circuits and other problems to achieve the effect of improving the design effect
Active Publication Date: 2019-08-23
天顿高新(北京)科技有限公司
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[0005] Embodiments of the present invention provide a noise detection device and a noise detection method for an orthogonal fundamental mode fluxgate sensor, which are used to solve the problem of the noise optimization design effect caused by the inability of the existing noise detection method to separately evaluate the noise contribution of the probe and the signal processing circuit. bad question
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[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0031] The current noise detection method cannot separately evaluate the noise contribution of the probe and the signal processing circuit, and developers cannot carry out noise optimization design based on the probe and the signal processing unit separately, resulting in extremely poor pertinence and poor effect of noise optimization design. In t...
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The embodiment of the invention provides a noise detection device and noise detection method of an orthogonally fundamental-mode flux gate sensor. The device comprises a probe, a probe replacement circuit and a signal processing circuit, wherein the probe replacement circuit is a response circuit built according to a probe principle, a probe is used for being matched with the signal processing circuit for noise detection and evaluation of total noise of the sensor, the total noise of the sensor comprises probe self noise and signal processing circuit self noise, and the probe replacement circuit is used for being matched with the signal processing circuit for noise detection and evaluation of signal processing circuit self noise. In the device and the method, provided by the embodiment ofthe invention, the probe replacement circuit is arranged and matched with the signal processing circuit for noise detection, the signal processing circuit self noise is acquired, the probe self noiseis further obtained according to the total noise of the sensor, noise separation detection of the probe and the signal processing circuit is achieved, data support is provided for achieving targeted sensor noise optimization design, and the sensor noise optimization design effect is favorably improved.
Description
technical field [0001] The invention relates to the technical field of noise detection, in particular to a noise detection device and a noise detection method for an orthogonal fundamental mode fluxgate sensor. Background technique [0002] Fluxgate sensor is a common weak magnetic detection sensor, which is widely used in medical treatment, geophysical exploration, space physics, underwater magnetic anomaly detection and other fields. The orthogonal fundamental mode fluxgate sensor uses a unipolar current source to excite the amorphous wire, and uses a pick-up coil to detect the signal modulated by the external magnetic field to be measured at the same frequency, and outputs a voltage signal linearly related to the external magnetic field to be measured through the signal processing circuit , has the advantages of low noise, small size and wide frequency band. [0003] The noise level is one of the key technical parameters of the quadrature fundamental mode fluxgate sensor...
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IPC IPC(8): G01H11/02
CPCG01H11/02G01R29/26
Inventor 陈凯袁振中宋思璇
Owner 天顿高新(北京)科技有限公司