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A static automatic calibration system for eddy current sensors

An eddy current sensor, automatic calibration technology, applied in the direction of the instrument, can solve the problem that the distance between the sensor to be calibrated and the calibration plate cannot be guaranteed to be exactly zero, and achieve the effect of large bearing capacity, small system error and high measurement accuracy

Active Publication Date: 2016-05-04
ZHEJIANG UNIV
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Problems solved by technology

[0004] In order to overcome the disadvantage that the existing eddy current sensor static calibrator cannot ensure that the distance between the sensor to be calibrated and the calibration plate is exactly zero, the present invention provides a method that can make the distance between the sensor to be calibrated and the calibration plate exactly Zero, a static automatic calibration system for eddy current sensors that improves calibration accuracy

Method used

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  • A static automatic calibration system for eddy current sensors
  • A static automatic calibration system for eddy current sensors
  • A static automatic calibration system for eddy current sensors

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Embodiment 2

[0091] The difference between this embodiment and Embodiment 1 lies in that the specific structure of the constant torque knob is different. The structure except the constant torque knob is the same as that of Embodiment 1.

[0092] Such as Figure 7 As shown, the structure of the second constant torque knob is as follows: the constant torque knob 12 includes a connecting screw 12-1, a spring 12-2, a first ratchet 12-3, a second ratchet 12-4, and a knob body 12-5 And sleeve 12-6; Connecting screw 12-1 comprises the connecting shaft that is fixed with miniature screw rod 15, and the transmission shaft that is connected with first ratchet 12-3 and is positioned at the connecting block between connecting shaft and transmission shaft; First ratchet 12 -3 is slidably sleeved on the transmission shaft, and the transmission shaft is provided with a first limit block; the first ratchet 12-3 and the second ratchet 12-4 respectively include a gear tooth part and a sleeve part, and the ...

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Abstract

A static automatic calibration system of an electrical vortex sensor comprises a base, a static calibration disc, a sensor clamp for mounting a calibrated sensor, a driving mechanism for driving the static calibration disc to be close to or away from the calibrated sensor, and a guide device for guiding the static calibration disc to move. The driving mechanism is arranged in the base, the static calibration disc is mounted on the driving mechanism through a calibration disc support, the sensor clamp is fixed on a sliding block, a guide rail for guiding the sliding block to slide linearly is arranged on the base, a constant torque rotary knob for driving the sliding block to slide is arranged on the sliding block, the constant torque rotary knob is fixedly connected with a small screw rod, the constant torque rotary knob is arranged on a check block in a penetrating mode, the small screw rod is meshed with a small nut which is fixed on the base, and when the static calibration disc abuts against the calibrated sensor, the constant torque rotary knob conducts idling. The static automatic calibration system has the advantages of enabling the distance between the calibrated sensor and the calibration disc to be zero exactly and improving the correction precision.

Description

technical field [0001] The invention relates to the technical field of testing and sensors, in particular to a static automatic calibration system for an eddy current sensor. technical background [0002] The eddy current sensor is a sensor for non-contact measurement, which adopts the principle of induced eddy current. When the coil with high-frequency current is close to the metal to be tested, the high-frequency electromagnetic field generated by the high-frequency current on the coil will generate an induced current on the metal surface, which is called eddy current. [0003] Chinese patent application No. 20081036312.2 discloses a fully automatic dynamic / static calibrator for eddy current sensors, including a probe to be calibrated, a front-end device, a static calibration specimen plate, a mounting bracket for the static calibrating probe, and a linear actuator driven by a stepping motor. The module, the movable guide rail extension rack driven by it, the positioning ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D18/00
CPCG01D18/00
Inventor 何闻徐祥周杰贾叔仕
Owner ZHEJIANG UNIV
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