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Electric vortex contactless approaching track shaft-metering device

A non-contact, eddy current technology, applied in the direction of material magnetic variables, etc., can solve the problems of difficult installation, low reliability, easy to wear, etc., to achieve the effect of broadening the application, reducing interference, and improving the detection rate

Active Publication Date: 2005-02-16
HEFEI GOCOM INFORMATION &TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

This method is easy to wear, difficult to install and low in reliability

Method used

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  • Electric vortex contactless approaching track shaft-metering device
  • Electric vortex contactless approaching track shaft-metering device
  • Electric vortex contactless approaching track shaft-metering device

Examples

Experimental program
Comparison scheme
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Embodiment

[0055] The eddy current non-contact adjacent track axle counter includes a sensor, an active oscillation maintenance circuit unit, a detection and level conversion circuit unit, an output comparison and pulse width correction circuit unit, a current conversion circuit unit, a power supply and a voltage stabilization circuit unit and Oscillation intensity adaptive control unit, see Figure 1.

[0056] see figure 2 , the sensor includes a semi-annular open magnetic body 1, a sandbag multi-strand copper core wire 2 and two capacitors 3, the sandbag multi-strand copper core wire 2 is evenly wound on the semi-annular open magnetic body 1, and two capacitors 3 are connected in parallel to the sandbag At both ends of the multi-strand copper core wire 2, the capacitance values ​​of the two capacitors are 1000pF and 10000pF respectively; they together form an LC resonant circuit, and the three wires drawn from A, B, and C are respectively connected to the active oscillation maintenance ...

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Abstract

The present invention relates to an automatic detection device for rail vehicles used in railway traffic and mining metallurgical industry, in particular, an electric eddy current non-contact proximity rail axometer. It is characterized by that it adopts half-ring opened magnetic body whose exterior is winded with cotton covered wire and parallelly-connected sensor formed from capacitor; and makes the adaptive feedback control circuit be used in active oscillating circuit to make oscillation intensity control to raise detection sensitivity, enhance power of rail axometer for inhibiting interference factors of temperature, dampness and element and device parameter drift, etc. and raise the detection rate of rail axometer self body.

Description

technical field [0001] The invention relates to an automatic detection device for rail vehicles used in railway transportation and mine metallurgy. Background technique [0002] There are two main methods for automatic detection of existing rail vehicles: [0003] One is the track circuit detection method, which uses the existing potential difference between the two rails (or the detection device itself applies an excitation signal to the two rails) when the vehicle is approaching, the metal wheel short-circuits the two rails. The potential changes to detect whether there is a vehicle. This measurement method has the following disadvantages: [0004] 1. It is impossible to measure the number of axles, and it is also impossible to measure the number of passing vehicles; 2. It is impossible to measure the speed of passing vehicles; 3. To measure the direction of passing vehicles, it is necessary to set up two separate tracks at two sections of the rails that are insulated fr...

Claims

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Application Information

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IPC IPC(8): G01N27/72
Inventor 韩江洪蒋建国魏臻张维勇陆阳胡敏程运安程磊
Owner HEFEI GOCOM INFORMATION &TECH CO LTD
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