GB1261344A - Improvements in or relating to materials testing apparatus - Google Patents

Improvements in or relating to materials testing apparatus

Info

Publication number
GB1261344A
GB1261344A GB925168A GB925168A GB1261344A GB 1261344 A GB1261344 A GB 1261344A GB 925168 A GB925168 A GB 925168A GB 925168 A GB925168 A GB 925168A GB 1261344 A GB1261344 A GB 1261344A
Authority
GB
United Kingdom
Prior art keywords
probe
vibrator
accelerometer
spring
movement
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.)
Expired
Application number
GB925168A
Inventor
Michael Alan Scott
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.)
Electricity Council
Original Assignee
Electricity Council
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 Electricity Council filed Critical Electricity Council
Priority to GB925168A priority Critical patent/GB1261344A/en
Publication of GB1261344A publication Critical patent/GB1261344A/en
Expired 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
    • G01M7/00—Vibration-testing of structures; Shock-testing of structures

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)

Abstract

1,261,344. Acoustic inspection devices. ELECTRICITY COUNCIL. 27 Jan., 1969 [26 Feb., 1968], No. 9251/68. Heading H4D. A materials testing apparatus, e.g. for detecting decay in telegraph poles, comprises a vibrator 11 for applying vibrations through a probe 13 to the material, means for indicating the acceleration or amplitude of movement of the probe, and a spring 17 arranged to bias the probe rigidly against a stop until a predetermined pressure on the vibrator, applied towards the material, overcomes the spring bias so that the probe is then free to vibrate. Probe 13 slides in P.T.F.E. bearings 14, 18. The spring acts on a piezo-electric accelerometer 12 which, with collar 15 and bearing 18, limits the probe movement. The accelerometer output drives a meter 25 via amplifier 24. Decayed poles present a low mechanical impedance to the vibrations and so result in a high meter reading. The vibrator drive oscillator 26 and units 24, 25 may be disposed in a easing 22 having a pistol grip 21 and a dust seal 19. The accelerometer may be mechanically tuned, or the amplifier electrically tuned, to the vibrator frequency (e.g. in the range 40-80 Hz). The probe tip may be screwed or otherwise fixed to the material.
GB925168A 1968-02-26 1968-02-26 Improvements in or relating to materials testing apparatus Expired GB1261344A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB925168A GB1261344A (en) 1968-02-26 1968-02-26 Improvements in or relating to materials testing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB925168A GB1261344A (en) 1968-02-26 1968-02-26 Improvements in or relating to materials testing apparatus

Publications (1)

Publication Number Publication Date
GB1261344A true GB1261344A (en) 1972-01-26

Family

ID=9868368

Family Applications (1)

Application Number Title Priority Date Filing Date
GB925168A Expired GB1261344A (en) 1968-02-26 1968-02-26 Improvements in or relating to materials testing apparatus

Country Status (1)

Country Link
GB (1) GB1261344A (en)

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