JPWO2021152939A5

JPWO2021152939A5 -

Info

Publication number: JPWO2021152939A5
Application number: JP2021574465A
Authority: JP
Filing date: 2020-10-27
Publication date: 2022-09-13
Anticipated expiration: 2040-10-27

Description

上記目的を達成するために、この発明の第１の局面におけるワイヤロープ検査装置は、ワイヤロープの磁界の変化を検知する検知コイルと、検知コイルにより取得された検知信号を受信する制御部と、を備え、制御部は、複数回のワイヤロープの第１測定において検知コイルにより取得され、ワイヤロープの位置ごとの検知信号を表す複数の第１検知信号と、第１測定の後に行われる複数回のワイヤロープの第２測定において検知コイルにより取得され、ワイヤロープの位置ごとの検知信号を表す複数の第２検知信号との差分に基づき、ワイヤロープの状態を検知するように構成されている。 To achieve the above object, a wire rope inspection apparatus according to a first aspect of the present invention includes a detection coil for detecting a change in the magnetic field of the wire rope, a control section for receiving a detection signal obtained by the detection coil, The control unit includes a plurality of first detection signals acquired by the detection coil in a plurality of first measurements of the wire rope and representing a detection signal for each position of the wire rope, and a plurality of It is configured to detect the state of the wire rope based on the difference between the plurality of second detection signals obtained by the detection coil in the second measurement of the wire rope and representing the detection signal for each position of the wire rope. there is

この発明の第２の局面におけるワイヤロープ検査システムは、ワイヤロープの磁界の変化を検知する検知コイルを含む検査装置と、検知コイルにより取得された検知信号を受信する制御装置と、を備え、制御装置は、複数回のワイヤロープの第１測定において検知コイルにより取得され、ワイヤロープの位置ごとの検知信号を表す複数の第１検知信号と、第１測定の後に行われる複数回のワイヤロープの第２測定において検知コイルにより取得され、ワイヤロープの位置ごとの検知信号を表す複数の第２検知信号との差分に基づき、ワイヤロープの状態を検知するように構成されている。 A wire rope inspection system according to a second aspect of the present invention comprises an inspection device including a detection coil that detects a change in the magnetic field of the wire rope, and a control device that receives a detection signal obtained by the detection coil. The apparatus comprises a plurality of first sensed signals acquired by the sensing coil at a plurality of first measurements of the wire rope and representative of the sensed signal for each position of the wire rope, and a plurality of wire rope measurements taken after the first measurement. The state of the wire rope is detected based on the difference from the plurality of second detection signals obtained by the detection coil in the second measurement of and representing the detection signal for each position of the wire rope.

この発明の第３の局面におけるワイヤロープ検査方法は、ワイヤロープの磁界の変化を検知する検知コイルにより、複数回のワイヤロープの第１測定において、ワイヤロープの位置ごとの検知信号を表す複数の第１検知信号を取得する工程と、第１測定の後に、複数回のワイヤロープの第２測定において、検知コイルにより、ワイヤロープの位置ごとの検知信号を表す複数の第２検知信号を取得する工程と、複数の第１検知信号と複数の第２検知信号との差分に基づき、ワイヤロープの状態を検知する工程と、を備える。 A wire rope inspection method according to a third aspect of the present invention provides a plurality of detection signals representing detection signals for each position of the wire rope in a plurality of first measurements of the wire rope by a detection coil that detects changes in the magnetic field of the wire rope. obtaining a first sensed signal; and after the first measurement, in a plurality of second measurements of the wire rope, the sensing coil generates a plurality of second sensed signals representing the sensed signal for each position of the wire rope. and detecting the state of the wire rope based on the difference between the plurality of first detection signals and the plurality of second detection signals .

上記第１の局面におけるワイヤロープ検査装置、上記第２の局面におけるワイヤロープ検査システム、および、上記第３の局面におけるワイヤロープ検査方法では、上記のように、複数の第１検知信号と、複数の第２検知信号との差分に基づき、ワイヤロープの状態が検知される。ここで、ワイヤロープの揺れ等に起因する信号（ノイズ）は、一時的に現れるものであるので、検知信号（出力波形）の中での現れ方（出力波形において信号が現れる位置）がランダムに変化し得るものである。一方、たとえばワイヤロープの損傷等に起因する信号は、一時的なものではなく、検知信号（出力波形）の中での現れ方（出力波形において信号が現れる位置）が固定されている。この特性を利用することによって、第１検知信号および第２検知信号をそれぞれ１つずつ用いる場合と異なり、複数の第１（第２）検知信号において共通に現れる信号とランダムに現れる信号とに基づいて、ワイヤロープの損傷等に起因して現れた信号と、ワイヤロープの揺れ等に起因して一時的に現れた信号との判別を行うことができる。その結果、ワイヤロープの損傷等または揺れ等に起因する信号（ノイズ）が存在する場合にも、ワイヤロープの損傷を容易に検知することができる。 In the wire rope inspection device in the first aspect, the wire rope inspection system in the second aspect, and the wire rope inspection method in the third aspect, as described above, a plurality of first detection signals ; The state of the wire rope is detected based on the difference from the plurality of second detection signals . Here, since the signal (noise) caused by the swaying of the wire rope, etc., appears temporarily, the way in which it appears in the detection signal (output waveform) (the position in which the signal appears in the output waveform) is random. It can change. On the other hand, a signal caused by, for example, damage to a wire rope is not temporary and has a fixed appearance in the detection signal (output waveform) (the position at which the signal appears in the output waveform). By utilizing this characteristic, unlike the case where each one of the first detection signal and the second detection signal is used, based on a signal that appears commonly in a plurality of first (second) detection signals and a signal that appears randomly, Thus, it is possible to discriminate between a signal that appears due to damage to the wire rope and a signal that appears temporarily due to swaying of the wire rope. As a result, even if there is a signal (noise) caused by the damage or the like of the wire rope or the shaking or the like, it is possible to easily detect the damage of the wire rope.

Claims

a detection coil for detecting changes in the magnetic field of the wire rope;
A control unit that receives a detection signal acquired by the detection coil,
The control unit obtains a plurality of first detection signals obtained by the detection coil in a plurality of first measurements of the wire rope and represents a detection signal for each position of the wire rope, and a plurality of first detection signals performed after the first measurement. The state of the wire rope is detected based on the difference from the plurality of second detection signals obtained by the detection coil in the second measurement of the wire rope a plurality of times and representing the detection signal for each position of the wire rope. A wire rope inspection device configured to.

Based on the processing of calculating the difference between the plurality of first detection signals and the plurality of second detection signals , and the addition processing based on the first detection signal and the second detection signal, The wire rope inspection device according to claim 1, configured to detect the condition of the wire rope.

The control unit provides a first value obtained by adding together the plurality of first detection signals and a second value obtained by adding together the plurality of second detection signals. 3. The wire rope inspection device according to claim 2, configured to detect the state of the wire rope based on the difference from the value.

The controller controls the wire rope based on a third value obtained by adding differences in all combinations of the plurality of first detection signals and the plurality of second detection signals. 3. The wire rope inspection device of claim 2, configured to detect a condition.

The control unit, based on a fourth value obtained by adding differential values of differences in all combinations of the plurality of first detection signals and the plurality of second detection signals, 3. The wire rope inspection device according to claim 2, configured to detect the condition of the wire rope.

The control unit is configured to detect the state of the wire rope based on the plurality of second detection signals obtained in the plurality of second measurements that are the same number of times as the first measurement. The wire rope inspection device according to claim 1.

2. The wire rope inspection device according to claim 1, wherein said first detection signal is a detection signal obtained from said wire rope in an undamaged state.

A plurality of the wire ropes are provided,
2. The wire rope inspection device according to claim 1, wherein said detection coil is configured to collectively detect the magnetic properties of said plurality of wire ropes.

a wire rope inspection device including a detection coil for detecting changes in the magnetic field of the wire rope;
A control device that receives a detection signal obtained by the detection coil,
The controller controls a plurality of first sensing signals acquired by the sensing coil in a plurality of first measurements of the wire rope and representing sensing signals for each position of the wire rope, and The state of the wire rope is detected based on the difference from the plurality of second detection signals obtained by the detection coil in the second measurement of the wire rope a plurality of times and representing the detection signal for each position of the wire rope. A wire rope inspection system configured to.

obtaining a plurality of first detection signals representing detection signals for each position of the wire rope in a plurality of first measurements of the wire rope by a detection coil that detects changes in the magnetic field of the wire rope;
obtaining a plurality of second sensed signals representing a sensed signal for each position of the wire rope by the sensing coil in a plurality of second measurements of the wire rope after the first measurement;
and detecting the state of the wire rope based on the difference between the plurality of first detection signals and the plurality of second detection signals .