JPS5719634A - Inspecting method for internal pressure of closed can - Google Patents

Inspecting method for internal pressure of closed can

Info

Publication number
JPS5719634A
JPS5719634A JP9479080A JP9479080A JPS5719634A JP S5719634 A JPS5719634 A JP S5719634A JP 9479080 A JP9479080 A JP 9479080A JP 9479080 A JP9479080 A JP 9479080A JP S5719634 A JPS5719634 A JP S5719634A
Authority
JP
Japan
Prior art keywords
pass filters
vibration
band
band pass
bands
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
JP9479080A
Other languages
Japanese (ja)
Other versions
JPS6138812B2 (en
Inventor
Mikihiko Hamazaki
Kozo Oba
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.)
Hitachi Zosen Corp
Original Assignee
Hitachi Zosen Corp
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 Hitachi Zosen Corp filed Critical Hitachi Zosen Corp
Priority to JP9479080A priority Critical patent/JPS5719634A/en
Priority to US06/218,770 priority patent/US4399514A/en
Publication of JPS5719634A publication Critical patent/JPS5719634A/en
Publication of JPS6138812B2 publication Critical patent/JPS6138812B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
    • G01L11/04—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by acoustic means
    • 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
    • G01M3/36—Investigating fluid-tightness of structures by using fluid or vacuum by detecting change in dimensions of the structure being tested
    • 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
    • G01N2291/02872—Pressure

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Measuring Fluid Pressure (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

PURPOSE:To enable the accurate detection of defective can, by a method wherein 2 bands of a low frequency band, wherein a fundmental frequency compounds is distributed, and a high frequency band wherein high harmonic components are distributed, are formed, and filters are aligned in the two bands to subdivide for wave-filtering. CONSTITUTION:If a can (C) to be inspected is struck with a magnetic means or other electric means, the lid of the can vibrates. A vibration detectors TS, in which an acoustic or magnetic means is employed, detects the vibration phenomenon. The detector TS outputs an electric signal corresponding to the vibration of the external surface of the can, and is amplified by a pre-amplifier PA to be inputted in parallel to lower side band pass filters FL1-FLn and higher side band pass filters FH1- FHn. Said band pass filters can pass through only a vibrating signal being within a given band, and thereby their respective signals are outputted through the seperation and wave-filtering from among frequency components of can-strinking, and after amplifrying, an expanded can be reliably decided by means of a pattern analysis deciding circuit D.
JP9479080A 1979-12-26 1980-07-10 Inspecting method for internal pressure of closed can Granted JPS5719634A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP9479080A JPS5719634A (en) 1980-07-10 1980-07-10 Inspecting method for internal pressure of closed can
US06/218,770 US4399514A (en) 1979-12-26 1980-12-22 Method of inspecting internal pressures in sealed containers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9479080A JPS5719634A (en) 1980-07-10 1980-07-10 Inspecting method for internal pressure of closed can

Publications (2)

Publication Number Publication Date
JPS5719634A true JPS5719634A (en) 1982-02-01
JPS6138812B2 JPS6138812B2 (en) 1986-09-01

Family

ID=14119868

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9479080A Granted JPS5719634A (en) 1979-12-26 1980-07-10 Inspecting method for internal pressure of closed can

Country Status (1)

Country Link
JP (1) JPS5719634A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62115333A (en) * 1985-11-14 1987-05-27 Yukio Ogawa Ultramicro-pressure response type multifunctional sensor device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62115333A (en) * 1985-11-14 1987-05-27 Yukio Ogawa Ultramicro-pressure response type multifunctional sensor device

Also Published As

Publication number Publication date
JPS6138812B2 (en) 1986-09-01

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