Eddy current sensor and detection method
An eddy current sensor and detection node technology, applied in the sensor field, can solve problems such as data distortion, and achieve the effect of accurate voltage amplitude change and accurate analysis
Active Publication Date: 2019-10-18
深圳市普颂电子有限公司
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Problems solved by technology
However, it uses filtering and linear compensation, which makes the measured data distorted and has certain errors.
Method used
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Embodiment Construction
[0055] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0056] Embodiment, an eddy current sensor, such as figure 1 shown, including Vector 1 (see Figure 5 ); the excitation coil 2, the receiving coil 3 and the processing module 4 are arranged on the carrier 1; preferably, the excitation coil 2, the receiving coil 3 and the processing module 4 are arranged on the carrier 1 by means of circuit printing.
[0057] Such as figure 1 As shown, an excitation signal generator 5 is connected to the excitation coil 2 , and the excitation signal generator 5 will inject an excitation signal into the excitation coil 2 to generate a changing magnetic field on the excitation coil 2 .
[0058] Such as figure 1 As shown, the number of receiving coils 3 is at least one, and the preferred embodiment is 3 to 6; multiple receiving coils 3 correspond to receiving signals from the excitation coil 2, ensuring that the signals...
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The invention discloses an eddy current sensor and a detection method, and relates to the technical field of sensors. The technical points of the eddy current sensor comprise a carrier, and the carrier is provided with an excitation coil and at least one receiving coil for receiving a signal sent by the excitation coil; the eddy current sensor further comprises a processing module; the processingmodule comprises: a storage capacitor for storing charges to form a voltage; a toggle switch, wherein one end of which is connected to the storage capacitor, and the other end of which comprises a current passing node and a detection node; an execution circuit, wherein one end of which is connected to the current passing node, and the execution circuit receives a detection voltage and converts thesize of the detection voltage into the size of the current flux of the execution circuit; a detection output end connected to the detection node for outputting the voltage of a high voltage end of the storage capacitor; and a control unit for outputting a control signal and switching the toggle switch to the detection node after connecting the toggle switch to the current passing node for a specified period. The eddy current sensor has the advantages of small output result error.
Description
technical field [0001] The invention relates to the technical field of sensors, more specifically, it relates to an eddy current sensor and a detection method. Background technique [0002] At present, the Chinese patent with publication number CN102072694A discloses an eddy current distance sensor. Wherein, the eddy current distance sensor includes: a coil for generating a magnetic field; an eddy current measuring circuit connected to the coil for generating a first output voltage according to the magnetic field; an amplifier for amplifying the first output voltage to obtain second output voltage. [0003] In the prior art, similar to the above-mentioned eddy current sensor, when the distance between the measured metal and the coil changes, the corresponding magnetic field of the coil also changes, and the change of the magnetic field causes the change of the oscillating voltage amplitude of the coil; and Since the voltage generated by coil oscillation is alternating, det...
Claims
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Login to View More IPC IPC(8): G01D5/24
CPCG01D5/24
Inventor 沈江定姚礼本刘玉平
Owner 深圳市普颂电子有限公司