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Surface crystal element symmetric side grinding frequency modulation method

A surface element, symmetrical technology, applied in the direction of electrical components, impedance networks, etc., to reduce mechanical energy, suppress the generation of clutter, and improve the quality of the effect

Active Publication Date: 2011-07-27
HUBEI TKD ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to aim at the defects of the existing crystal element frequency modulation method, and provide a surface crystal element symmetrical side grinding frequency modulation method that can effectively suppress the generation of clutter and improve the quality of the finished product

Method used

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  • Surface crystal element symmetric side grinding frequency modulation method
  • Surface crystal element symmetric side grinding frequency modulation method
  • Surface crystal element symmetric side grinding frequency modulation method

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] According to the definition of surface crystal element mechanical quality factor:

[0017]

[0018] It can be seen that due to the inconsistency of the masses at both ends, the mechanical energy lost in each cycle increases during resonance, and more energy is required to make the crystal vibrate, that is, the crystal impedance increases.

[0019] The invention adopts the symmetrical side grinding method to side grind the A end and the B end of the element respectively, so that the quality of both ends is consistent, the mechanical energy lost in each cycle is reduced during resonance, and the two ends are balanced and resonant. Specific steps are as follows:

[0020] (1) Insert the crystal element into the FM stick of the FM machine, and record the difference in the readings of the FM base station when the copper nozzle of the FM stick is in contact with the shell of the surface crystal element or not;

[0021] (2) Try grinding one side of the crystal element quart...

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Abstract

The invention relates to a method for frequency modulation of the watch crystal plain in the process of manufacturing the watch crystal. The method adopts a symmetrical lateral wear way to laterally wear two ends of a tuning fork made of plain quartz, so that the two ends have the same quality, thus reducing mechanical energy consumption in each cycle of resonance; the two ends have the balanced resonance so as to retrain the generation of mixed wave effectively and improve the quality of completed products.

Description

technical field [0001] The invention relates to a method for frequency modulation of crystal elements in the crystal production process. Background technique [0002] At present, the quartz crystals used in the watch crystal industry are all in the shape of tuning forks, see figure 1 , Due to the inevitable error of the quartz crystal when cutting, the quality of the two ends of the tuning fork is not equal, so it will cause a lot of clutter on the crystal, and it is not easy to start vibration and other faults. The natural frequency of the watch crystal depends on the length of the two ends of the tuning fork and other factors. The traditional frequency modulation method only adjusts the frequency point to the center frequency (such as 32768Hz), but ignores the symmetry of the mass at both ends of the tuning fork. In addition, the traditional method is to directly read the frequency value. The minimum error of this adjustment method is 1Hz, and the frequency modulation err...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03H9/215H03H9/15H03H3/04H03H3/02
Inventor 喻信东
Owner HUBEI TKD ELECTRONICS TECH