JPS5742832A - Pinhole inspecting method for enameled bathtub - Google Patents

Pinhole inspecting method for enameled bathtub

Info

Publication number
JPS5742832A
JPS5742832A JP10302881A JP10302881A JPS5742832A JP S5742832 A JPS5742832 A JP S5742832A JP 10302881 A JP10302881 A JP 10302881A JP 10302881 A JP10302881 A JP 10302881A JP S5742832 A JPS5742832 A JP S5742832A
Authority
JP
Japan
Prior art keywords
liquid
bathtub
enameled
pinholes
ultrasonic
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.)
Pending
Application number
JP10302881A
Other languages
Japanese (ja)
Inventor
Takanobu Nishiyama
Yutaka Tanaka
Shoichi Kitamura
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP10302881A priority Critical patent/JPS5742832A/en
Publication of JPS5742832A publication Critical patent/JPS5742832A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

PURPOSE:To detect even a fine pinhole by substituting air and foreign matter in pinholes with a liquid by generating an ultrasonic wave by an ultrasonic vibrator installed in an enameled bathtub filled with the liquid. CONSTITUTION:An enameled bathtub 1 is filled with >=1 kinds of liquid 2, such as water, an electrolyte, and a surface active agent solution, and ultrasonic vibrators 4, 4... are installed at intervals along the internal wall 3 of the enameled bathtub. Those ultrasonic vibrators 4, 4... generate ultrasonic waves to substitute air 6 and foreign matter 7 is pinholes 5, 5... formed in the enameled bathtub internal wall 3 with the liquid 2 by ultrasonic energy, and even after the liquid in the bathtub 1 is discharged, the liquid 2 is left in the pinholes 5, 5.... Then, pinhole detection electrodes (e.g., an anode electrode 8 and a cathode electrode 9) are brought into contact with the internal wall 3 and the enameled bathtub 1 to detect the pinholes 5, 5....
JP10302881A 1981-06-30 1981-06-30 Pinhole inspecting method for enameled bathtub Pending JPS5742832A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10302881A JPS5742832A (en) 1981-06-30 1981-06-30 Pinhole inspecting method for enameled bathtub

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10302881A JPS5742832A (en) 1981-06-30 1981-06-30 Pinhole inspecting method for enameled bathtub

Publications (1)

Publication Number Publication Date
JPS5742832A true JPS5742832A (en) 1982-03-10

Family

ID=14343187

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10302881A Pending JPS5742832A (en) 1981-06-30 1981-06-30 Pinhole inspecting method for enameled bathtub

Country Status (1)

Country Link
JP (1) JPS5742832A (en)

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