JPS5737243A - Method of detecting soft spot for tape wound insulated cable - Google Patents

Method of detecting soft spot for tape wound insulated cable

Info

Publication number
JPS5737243A
JPS5737243A JP11267380A JP11267380A JPS5737243A JP S5737243 A JPS5737243 A JP S5737243A JP 11267380 A JP11267380 A JP 11267380A JP 11267380 A JP11267380 A JP 11267380A JP S5737243 A JPS5737243 A JP S5737243A
Authority
JP
Japan
Prior art keywords
ultrasonic wave
layer
wave
insulated tape
pulse
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP11267380A
Other languages
Japanese (ja)
Other versions
JPS6339859B2 (en
Inventor
Hiromasa Fukagawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Central Research Institute of Electric Power Industry
Original Assignee
Central Research Institute of Electric Power Industry
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Central Research Institute of Electric Power Industry filed Critical Central Research Institute of Electric Power Industry
Priority to JP11267380A priority Critical patent/JPS5737243A/en
Publication of JPS5737243A publication Critical patent/JPS5737243A/en
Publication of JPS6339859B2 publication Critical patent/JPS6339859B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/34—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor
    • G01N29/341—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor with time characteristics
    • G01N29/343—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor with time characteristics pulse waves, e.g. particular sequence of pulses, bursts
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04—Analysing solids
    • G01N29/07—Analysing solids by measuring propagation velocity or propagation time of acoustic waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/028—Material parameters
    • G01N2291/02854—Length, thickness

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Acoustics & Sound (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

PURPOSE:To positively perform the detection of a soft spot from the transformation ratio, by a method wherein an ultrasonic wave signal is transmitted, while a load is being applied to the layer of an insulated tape in its radial direction, to measure the difference between the time when the signal is transmitted and that when a reflected wave is received and to obtain the change of the thickness of the insulated tape. CONSTITUTION:When an ultrasonic wave P1 in the form of a pulse is transmitted in the radial direction of an ultrasonic wave tranceiver 4 placed on the surface of the layer of an insulated tape 3, the ultrasonic wave P1 is allowed to penetrate through the insulated tape layer within the time corresponding to the propagation constant of the layer. The wave having reached a conductor 2 is reflected from its surface. The reflected wave P2 is received by the ultrasonic wave tranceiver 4 after it has penetrated through the insulated tape layer 3. For this reason, the wave does not affect the insulated tape layer 3 located between the conductor 2 and a supporting board 5. Therefore, by measuring the time DELTAt between the transmission and reception of the ultrasonic wave pulse as shown in the figure, or the delayed time of the ultrasonic wave receiving pulse, it is possible to reliably detect only the thickness of the insulated tape layer between the ultrasonic pulse transmitting surface and the conductor.
JP11267380A 1980-08-18 1980-08-18 Method of detecting soft spot for tape wound insulated cable Granted JPS5737243A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11267380A JPS5737243A (en) 1980-08-18 1980-08-18 Method of detecting soft spot for tape wound insulated cable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11267380A JPS5737243A (en) 1980-08-18 1980-08-18 Method of detecting soft spot for tape wound insulated cable

Publications (2)

Publication Number Publication Date
JPS5737243A true JPS5737243A (en) 1982-03-01
JPS6339859B2 JPS6339859B2 (en) 1988-08-08

Family

ID=14592611

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11267380A Granted JPS5737243A (en) 1980-08-18 1980-08-18 Method of detecting soft spot for tape wound insulated cable

Country Status (1)

Country Link
JP (1) JPS5737243A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001086280A1 (en) * 2000-05-08 2001-11-15 Abb Ab A method of measuring topography in an interface and use of the method for a high-voltage cable

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5316762A (en) * 1977-08-05 1978-02-16 Shigeichi Uematsu Method of forming screw of synthetic resin molded article
JPS53109686A (en) * 1977-03-07 1978-09-25 Kawasaki Heavy Ind Ltd Inspection method of contact property in coating films

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53109686A (en) * 1977-03-07 1978-09-25 Kawasaki Heavy Ind Ltd Inspection method of contact property in coating films
JPS5316762A (en) * 1977-08-05 1978-02-16 Shigeichi Uematsu Method of forming screw of synthetic resin molded article

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001086280A1 (en) * 2000-05-08 2001-11-15 Abb Ab A method of measuring topography in an interface and use of the method for a high-voltage cable

Also Published As

Publication number Publication date
JPS6339859B2 (en) 1988-08-08

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