Sound needle tuning excitation test device

Abstract

A sound needle tuning excitation test device, comprising upper and lower brackets and a vibration isolation mechanism installed on a vertical plate with a bottom plate, a sensor is installed on the upper bracket, a single-acting cylinder and a vibration exciter are installed on the lower bracket to form a whole, A high-speed solenoid valve is connected to the single-acting cylinder; the vibration exciter is connected as a whole by an adjustment rod, a connecting component, and a strong magnetic suction head, and cooperates with the sound needle to be tested on the vibration plate; the vibration isolation mechanism is composed of a A vibration isolation cylinder, a slide rail, and a vibration isolation seat with a chute cooperating with the slide rail and the vibration isolation cylinder are connected and composed of the vibration isolation seat and a vibration isolation component. Only two or three times of tuning and testing procedures are required for each tone needle on the vibrating plate. If the measurement frequency of the sound needle and the target pronunciation frequency are within ±5%, it is a qualified product, because the vibration isolation mechanism does not affect the sound being tested. The accuracy of the needle test and the tuning test is very high, and the requirements for the circuits and electrical equipment required for its supporting production are not high, so the failure rate of the equipment is low, the practicability is strong, and the work efficiency is also improved.

Description

technical field [0001] The invention relates to a tone-needle tuning device for an eight-tone piano, in particular to a tone-needle tuning excitation testing device. Background technique [0002] The quality of the sound needles of the eight-tone piano plays a key role in the quality of the eight-tone piano, and it is an important indicator. Therefore, the sound needles need to be fine-tuned before leaving the factory, and they must be repeatedly measured and processed to make the sound needles meet the standard requirements. [0003] Patent No. CN201210322697.5 "Eight-tone piano tone needle tuning excitation test device" provides a non-contact tone needle tuning excitation test device, although only one-time processing and debugging can quickly complete the tone needle tuning, testing, and improving work efficiency. However, after a long period of use, it is found that there are still some defects, such as relatively large use limitations, because the length and length of ...

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