Reversibly accurate and automatic large-stroke detection method and device of pipe cable

Abstract

The invention discloses reversibly accurate and automatic large-stroke detection method and device of a pipe cable. The device comprises an engine base, eight limiting wheels, two tensioning wheels, a counter wheel, a pressing and limiting wheel, a gear counting sensor, an approach switch and a sensing element. The device is characterized in that judgment of a measurement and movement direction of the pipe cable can be achieved by use of the approach switch and the sensing element; reversible measurement is achieved; reversible measurement is achieved; the positions of one counter wheel and a tensing wheel in each pair of limiting wheels can be automatically adjusted; measurement of pipe cables in different diameters can be met; the pressing force of the pipe cable is adjusted; the pipe cable is prevented from slipping; the reliability and the accuracy of pipe cable measurement can be improved by use of two counting sensors, and the reliability of the pipe cable detection is increased by using a PLC (programmable logic controller). The method and the device are advanced, scientific, strong in practicability, simple in structure, and suitable for special environments such as aviation, and reversibly accurate and automatic large-stroke detection of the pipe cable can be met.

Description

technical field [0001] The invention relates to a large-stroke reversible and accurate automatic detection method and device in the process of retracting and unwinding a towing cone pipe cable for aircraft airspeed calibration. Background technique [0002] The purpose of the large-stroke reversible and accurate automatic detection method and device of the umbilical cable is to be used for the retraction and release stroke detection of the towed cone umbilical cable in the airspeed calibration of the aircraft. The towed cone umbilical cable is the main component of the towed cone method of the aircraft airspeed calibration method. The method and device can also be used for the measurement of ordinary cables and hoses, such as the length or stroke measurement of electric wires, optical cables, nylon tubes, rubber hoses and the like. [0003] Among the commonly used large-stroke detection devices at present, a pair of transmission wheels is commonly used, one is a counting whe...

AI Technical Summary

Problems solved by technology

[0004] 1. There is no function of judging the moving direction of the umbilical cable in the umbilical cable stroke detection device, and the reversible detection of the umbilical cable cannot be realized, that is, only one-way detection of the umbilical cable can be realized;

[0005] 2. There is a point contact between the pipe cable and the transmission wheel, the adhesion is not strong, and it is easy to slip, resulting in large measurement errors;

[0006] 3. The positions of the counting wheel and the limit wheel are fixed, which can only be adapted to the detection of fixed-diameter umbilical cables;

[0007] 4. The limit mechanism composed of a pair of rollers cannot completely limit the vibration of the umbilical cable, and the position of the rollers is fixed, and it cannot adapt to the measurement of umbilical cables with different diameters.

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