JPS646714A - Roundness measurement for tire - Google Patents

Roundness measurement for tire

Info

Publication number
JPS646714A
JPS646714A JP62159576A JP15957687A JPS646714A JP S646714 A JPS646714 A JP S646714A JP 62159576 A JP62159576 A JP 62159576A JP 15957687 A JP15957687 A JP 15957687A JP S646714 A JPS646714 A JP S646714A
Authority
JP
Japan
Prior art keywords
circuit
value
tire
tread
conversion
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
JP62159576A
Other languages
Japanese (ja)
Other versions
JPH087064B2 (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 JP62159576A priority Critical patent/JPH087064B2/en
Publication of JPS646714A publication Critical patent/JPS646714A/en
Publication of JPH087064B2 publication Critical patent/JPH087064B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Abstract

PURPOSE:To measure the roundness of a tire, by a method wherein a non- contact sensor is arranged on a tread of a tire, then, the tire is turned to measure a deflection of the tire from an output of the sensor and an interval between peak positions is computed from a waveform cleared of effect of a groove of the tread to be compared with a reference value. CONSTITUTION:A non-contact sensor 10 is arranged on a tread X of a tire and an output thereof is inputted into a waveform processor 12 through an amplifier 11. The output is subjected to an A/D conversion with a circuit 12a and the present actually measured value S2 is subtracted from the preceding A/D value (reference value S1). A difference value P is compared with a refer ence value of a groove V by a circuit 12c: when the difference is zero, the measured value is subjected to a D/A conversion with a circuit 12d; when a difference is found, the value is corrected with a circuit 12e. The present D/A value is stored into a circuit 12f to be outputted from a circuit 12g. Then, with a controller 13, judgement of standard is performed with a circuit 13c via an A/D conversion circuit 13a, P-P/rotation computing circuit 13b. This extends the life of a sensor and enables highly accurate measurement.
JP62159576A 1987-06-29 1987-06-29 Tire roundness measurement method Expired - Fee Related JPH087064B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62159576A JPH087064B2 (en) 1987-06-29 1987-06-29 Tire roundness measurement method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62159576A JPH087064B2 (en) 1987-06-29 1987-06-29 Tire roundness measurement method

Publications (2)

Publication Number Publication Date
JPS646714A true JPS646714A (en) 1989-01-11
JPH087064B2 JPH087064B2 (en) 1996-01-29

Family

ID=15696731

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62159576A Expired - Fee Related JPH087064B2 (en) 1987-06-29 1987-06-29 Tire roundness measurement method

Country Status (1)

Country Link
JP (1) JPH087064B2 (en)

Also Published As

Publication number Publication date
JPH087064B2 (en) 1996-01-29

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