Data processing method of inductive type displacement sensor

A displacement sensor and data processing technology, applied in the field of sensors, can solve the problems of requiring large capacity, unfavorable large-scale production, and large scale of look-up tables.

Inactive Publication Date: 2016-09-07
XI AN JIAOTONG UNIV
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Problems solved by technology

However, this method has the following limitations: 1) The look-up table has a large scale (usually 10,000 to tens of thousands of units), requiring a large-capacity non-volatile memory, which is not conducive to the mini

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  • Data processing method of inductive type displacement sensor
  • Data processing method of inductive type displacement sensor
  • Data processing method of inductive type displacement sensor

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Embodiment Construction

[0063] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.

[0064] 1. Sensor modeling.

[0065] The inductive displacement sensor (IPS) involved in the present invention is made of sensing probe and detection circuit, as figure 1 shown. The sensing probe is the transducer of IPS, which is used to convert the distance between the sensing probe and the metal target into a measurable electrical signal; the detection circuit drives and detects the parameters of the sensing probe, and calculates the distance between the sensing probe and the metal target. target distance.

[0066] The sensor probe contains a coil wound with enameled wire, and its equivalent circuit model is as follows figure 2 shown. r is the coil internal resistance; L is the coil inductance; C P is the equivalent distributed capacitance. The internal resistance r changes with the ...

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Abstract

The invention provides a data processing method of an inductive type displacement sensor, for effectively reducing the calculation time complexity and the storage space complexity of a system. The method is accurate in data processing and is reliable and stable. The inductive type displacement sensor is composed of a sensing probe and a detection circuit. The sensing probe comprises a coil, and the detection circuit comprises a driving logic circuit, a switch tube Mn and a current-limiting resistor R which are connected with the coil to form a discharge loop, an analog-to-digital converter used for sampling, a driving circuit used for controlling the analog-to-digital converter to sample to obtain coil discharge waveforms, and a calculation circuit for obtaining an approach distance through calculating the discharge waveforms and outputting the approach distance. In the following content, an abbreviation IPS represents the inductive type displacement sensor, and ADC represents the analog-to-digital converter. The method comprises the following steps: 1, determining time constants of sampling of the ADC for two times; 2, establishing a high and low temperature search curve; 3, establishing a search table; and 4, the IPS calculating the approach distance in an online mode.

Description

technical field [0001] The invention belongs to the field of sensors, and relates to a detection method of an inductive displacement sensor, in particular to a data processing method of an inductive displacement sensor. Background technique [0002] Inductive Position Sensor (IPS) does not require mechanical contact, so it has the advantages of anti-pollution and wear, explosion-proof and waterproof, long life and low maintenance costs, and long hours of trouble-free operation. The above advantages make IPS widely applicable to electromechanical systems in the aviation field, including landing gear, passenger and cargo doors, ailerons, and thrust reversers of various aircraft. The types of aircraft involved include large civil aviation passenger planes, transport planes, etc. [0003] The main components of IPS currently used in the aviation field are provided by two companies, namely Crane (USA) and Crouzet (France). Their product principles and internal structures are th...

Claims

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Application Information

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IPC IPC(8): G01B7/02
CPCG01B7/02
Inventor 邵志标郭一欣
Owner XI AN JIAOTONG UNIV
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