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Method and device for driving inductive sensor with adjustable amplitude, frequency and phase

A sensor and dynamic inductance technology, applied in the direction of using electrical devices, measuring devices, instruments, etc., can solve problems such as unfavorable sensor measurement accuracy, and achieve the effects of avoiding unstable output signals, reducing volume, and improving stability.

Pending Publication Date: 2022-01-21
上海玛吉科自动化技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, this driving method is not conducive to improving the measurement accuracy of the sensor.

Method used

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  • Method and device for driving inductive sensor with adjustable amplitude, frequency and phase
  • Method and device for driving inductive sensor with adjustable amplitude, frequency and phase
  • Method and device for driving inductive sensor with adjustable amplitude, frequency and phase

Examples

Experimental program
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Embodiment approach 1

[0025] Implementation Mode 1, see figure 1 To illustrate this embodiment, this embodiment provides a driving signal generating device for a differential inductance sensor, and the device includes:

[0026] A signal generation unit module, a D / A conversion module and a drive module; the signal generation module outputs a digital excitation signal to the D / A conversion module, and the D / A conversion module outputs an analog excitation signal to the drive module, and the drive module Amplifying the received analog excitation signal and outputting the driving signal; wherein, the signal generating module is embedded with a signal generating software module implemented by computer software; the signal generating software module includes:

[0027] A setting submodule for setting the amplitude, frequency and phase parameters of the driving signal to be generated;

[0028] A signal output sub-module that generates a sine wave digital signal according to the set parameters and output...

Embodiment approach 2

[0029] Implementation mode two, see figure 1 Describe this embodiment. This embodiment is a further limitation of the device for providing drive signals for differential inductance sensors provided in Embodiment 1. The drive module further includes: a filtering sub-module; the filtering sub-module is used for The analog excitation signal is filtered.

Embodiment approach 3

[0030] Implementation mode three, see figure 1 This embodiment is described. This embodiment is a further limitation of the device for providing a driving signal for a differential inductance sensor provided in Embodiment 1, and the signal generating module is realized by a single-chip microcomputer.

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Abstract

The invention discloses an amplitude-frequency-phase-adjustable inductive sensor driving method and device, and relates to the field of displacement detection inductive sensors. At present, the amplitude, frequency and phase of a driving mode of an existing differential inductive sensor are all fixed, and an oscillation circuit adopted by the existing differential inductive sensor can cause amplitude fluctuation of an output signal due to fluctuation of a power supply, which is a factor influencing the precision of the sensor. According to the technical scheme, the device for providing the driving signal for the differential inductive sensor is specifically characterized in that a sine wave generation module outputs a digital excitation signal to a D / A conversion module, the D / A conversion module converts a received digital sine wave signal into an analog signal and transmits the analog signal to a driving module, and the analog signal is amplified and filtered by the driving module to drive the sensor. The method is suitable for driving a half-bridge type inductance sensor, a differential transformer type inductance sensor, a resistance sensor and the like.

Description

technical field [0001] The invention relates to the field of displacement detection inductance sensors, in particular to a driving signal generating device for a differential inductance sensor and a driving method and device for a differential inductance sensor with adjustable amplitude, frequency and phase. Background technique [0002] Differential inductive sensors are one of the most commonly used sensors in length measurement and come in two forms (see figure 2 , image 3 ): That is, the half-bridge inductive sensor (such as figure 2 shown) and differential transformer inductive sensors (such as image 3 Shown, referred to as LVDT). Among them, the working principle of the half-bridge inductive sensor is: when the probe 2 detects the workpiece 1 to be measured, it moves along the X direction, the iron core and the coil 4 move relative to each other, the magnetic resistance changes, and then through the coil The inductance value changes to judge the micro-motion dist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/02
CPCG01B7/02
Inventor 唐文彦吴速张晓琳王军唐明非谢宗奕李婷
Owner 上海玛吉科自动化技术有限公司