最新韩国三级激情高潮无遮挡_护士hd白色free性xxxⅹ_迈开腿打扑克的软件_日本乱辈乱奸视频中文字幕_99热这里只有精品最新_国产在线观看午夜天堂_亚洲av午夜精品麻豆_最新日本一级中文字幕_高清女女同性一區二區_午夜福利精品一区二区三区

First, the electrical horn Overview

1, electric horn pronunciation of electromagnetic resonance principle, double (single chassis ground), closed-end short-time working, mechanical intermittent oscillation.

2, electric horn work status of short-term fixed duty, continuous load time is not more than three seconds, a continuous beep 30 seconds parts destructive test scrapped.

3, the relevant references, enterprise standard Q/XDJL01-1997, Japanese Industrial Standard JIS & nbsp; D5701-1977 & nbsp; Industry Standard QC/T30-2003, professional standards ZB/T35001-87 & nbsp; GB GB-15742-2001 <./p>

4, at the obvious place identification current, voltage, the fundamental frequency, the sound pressure.

& nbsp; Second, electric horn works

& nbsp; Third, the basic structure and composition of horn key parts

Fourth, the speaker common faults and reason

1, the user using the speaker does not ring for some time. Reason: Some internal next spring, pronounce plate stress, contact wear, the current decline.

2, the user some time speakers sound bad. Reason: Some internal next spring, pronounce plate stress, fundamental frequency, current rise.

& nbsp;

speaker longevity understanding: reference to national standards (GB15742-2001) "3.1.3.1 power is not used for motorcycle 7kw small speakers 10000 times .3.1.3.2 for use M, N class car and more than 7kw Mount Motorcycle big horn 50,000 times. Durability Test 3.2.7.2 speakers to tweet one second, 4 seconds of rest cycle. If the trials half, when there is a change and test the sound level before allowing adjustment of the speaker The whole time. At the end of the test, in case of the need to allow adjustment again. "That is for less than 7kw trumpet allowable adjustment in 5000 for more than 7kw big horn 25,000 times Allows adjustment. But electric horn in actual use in order to make it possible for users to give way or avoidance crowd continuous long honk when other obstacles, beyond the Ming 1 second pause 4 seconds range, electric shock or severe erosion wear spring-chip, sound board After the stress change speakers do not sound or poor sound quality, its life is affected, it is possible to extend the life by the second adjustment.