JPS646715A - Bumpiness measurement for tire - Google Patents

Bumpiness measurement for tire

Info

Publication number
JPS646715A
JPS646715A JP15957787A JP15957787A JPS646715A JP S646715 A JPS646715 A JP S646715A JP 15957787 A JP15957787 A JP 15957787A JP 15957787 A JP15957787 A JP 15957787A JP S646715 A JPS646715 A JP S646715A
Authority
JP
Japan
Prior art keywords
value
tire
circuit
bumpiness
ruggedness
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
JP15957787A
Other languages
Japanese (ja)
Other versions
JP2539222B2 (en
Inventor
Tatsuji Kaneko
Takeshi Yonezawa
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.)
Yokohama Rubber Co Ltd
Original Assignee
Yokohama Rubber Co 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 Yokohama Rubber Co Ltd filed Critical Yokohama Rubber Co Ltd
Priority to JP62159577A priority Critical patent/JP2539222B2/en
Publication of JPS646715A publication Critical patent/JPS646715A/en
Application granted granted Critical
Publication of JP2539222B2 publication Critical patent/JP2539222B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Abstract

PURPOSE:To measure a bumpiness of a tire, by a method wherein a non-contact sensor is arranged on the side of a tire, the tire is rotated to measure ruggedness of the side from a sensor output and computation is performed for the elimination of the effect thereof. CONSTITUTION:A non-contact sensor 10 is arranged on side X of a tire and the tire is rotated at one cycle to input a sensor output into a waveform processor 12 through an amplifier 11. A difference value P is determined with an circuit 12b between the preceding value (reference value S1) and the present measured value S2 after the A/D conversion of the output with a circuit 12a and compared with a reference value of ruggedness Z by a circuit 12c. The measured value is set 12d for a D/A area when P=0, a difference is determined between value S1 and S2 to find the end of the ruggedness Z with a circuit 12f when pnot equal to 0. When the ruggedness Z ends, an A/D value is set at 12d for the D/A area and at 12g by correction if a difference is found. The present D/A value is stored 12h and outputted 12i and with a controller 13, a bumpiness waveform is computed with a circuit 13b after an A/D conversion 13a thereof and a standard decision is performed with a circuit 13c. This can extends the life of a sensor, thereby enabling accurate measurement of the bumpiness.
JP62159577A 1987-06-29 1987-06-29 Tire bumpy measurement method Expired - Lifetime JP2539222B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62159577A JP2539222B2 (en) 1987-06-29 1987-06-29 Tire bumpy measurement method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62159577A JP2539222B2 (en) 1987-06-29 1987-06-29 Tire bumpy measurement method

Publications (2)

Publication Number Publication Date
JPS646715A true JPS646715A (en) 1989-01-11
JP2539222B2 JP2539222B2 (en) 1996-10-02

Family

ID=15696751

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62159577A Expired - Lifetime JP2539222B2 (en) 1987-06-29 1987-06-29 Tire bumpy measurement method

Country Status (1)

Country Link
JP (1) JP2539222B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006115203A1 (en) 2005-04-22 2006-11-02 Bridgestone Corporation Method and device for detecting abnormality in outer shape of tire side section

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5269659A (en) * 1975-12-09 1977-06-09 Yokohama Rubber Co Ltd Apparatus for detecting bumpiness of tire
JPS61240107A (en) * 1985-04-17 1986-10-25 Sanyo Kiko Kk Sensor unit
JPS62151704A (en) * 1985-12-26 1987-07-06 Bridgestone Corp Shape detecting method for tire

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5269659A (en) * 1975-12-09 1977-06-09 Yokohama Rubber Co Ltd Apparatus for detecting bumpiness of tire
JPS61240107A (en) * 1985-04-17 1986-10-25 Sanyo Kiko Kk Sensor unit
JPS62151704A (en) * 1985-12-26 1987-07-06 Bridgestone Corp Shape detecting method for tire

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006115203A1 (en) 2005-04-22 2006-11-02 Bridgestone Corporation Method and device for detecting abnormality in outer shape of tire side section

Also Published As

Publication number Publication date
JP2539222B2 (en) 1996-10-02

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