Bolt axial force measurement apparatus and bolt axial force measurement program
AssigneesHonda Motor Co., Ltd., Ryoden Shonan Electronics Corporation
InventorsToshitsugu Sakakibara, Kazuhiro Tsuzaki, Toshiaki Ohashi, Tsukasa Ishida
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Abstract
A bolt axial force measurement apparatus of the present invention includes an echo detection section and an axial force calculation section. The echo detection section sets a head echo gate for the head echo and sets a bottom echo gate for the bottom echo, and executes tracking for a plurality of ultrasonic pulses emitted during tightening of the bolt so that the head echo gate and bottom echo gate are shifted independently to include the predetermined positions at the same position in the head echo gate and bottom echo gate.
Claims8
A bolt axial force measurement apparatus comprising:
- an echo detection section which detects a head echo and a bottom echo of an ultrasonic pulse emitted from a head side of a bolt toward a bottom surface of a shank of the bolt, and
- an axial force calculation section which calculates an axial force of the bolt based on a time difference between predetermined positions of the head echo and bottom echo detected by the echo detection section, wherein
- the echo detection section sets a head echo gate for the head echo and sets a bottom echo gate for the bottom echo;
- executes tracking for a plurality of ultrasonic pulses emitted during tightening of the bolt so that the head echo gate and bottom echo gate are shifted independently to include the predetermined positions at the same position in the head echo gate and bottom echo gate.
Dependencies are inferred from the claim text.