CN112696456A - Auxiliary vibration damping device and method for crystal oscillator - Google Patents
Auxiliary vibration damping device and method for crystal oscillator Download PDFInfo
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- CN112696456A CN112696456A CN202011531742.9A CN202011531742A CN112696456A CN 112696456 A CN112696456 A CN 112696456A CN 202011531742 A CN202011531742 A CN 202011531742A CN 112696456 A CN112696456 A CN 112696456A
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- Prior art keywords
- wire rope
- crystal oscillator
- circuit board
- steel wire
- auxiliary vibration
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/06—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/28—Counterweights, i.e. additional weights counterbalancing inertia forces induced by the reciprocating movement of masses in the system, e.g. of pistons attached to an engine crankshaft; Attaching or mounting same
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/05—Holders; Supports
- H03H9/10—Mounting in enclosures
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Oscillators With Electromechanical Resonators (AREA)
Abstract
The application discloses a crystal oscillator auxiliary vibration damping device which is characterized by comprising a circuit board for bearing a crystal oscillator, a steel wire rope and a base; the middle part of the steel wire rope is fixedly connected with the circuit board, and two ends of the steel wire rope are fixed on the base; the weight of the circuit board is borne by a fixing point in the middle of the steel wire rope. The application also comprises a crystal oscillator auxiliary vibration reduction method, and solves the problem that the vibration reduction method in the prior art still has large vibration amplitude.
Description
Technical Field
The application relates to the technical field of electronic components, in particular to a novel auxiliary vibration damping structure and a novel vibration damping method for a crystal oscillator.
Background
In the processes of satellite launching, spacecraft in-orbit operation, airplane flying and the like, severe vibration often exists, and the stability of the crystal oscillator is greatly reduced in a vibration environment, so that phase noise is seriously deteriorated, and the performance of a system is greatly influenced. It becomes important how to maintain high stability in a severe working environment.
The traditional vibration reduction method mainly comprises rubber vibration reduction or vibration reduction of a circuit board directly fixed by a steel wire rope. But in practical application, the vibration reduction effect of the rubber is not ideal and cannot reach the expected index; and because the circuit board is lighter, the vibration reduction method of directly fixing the circuit board only through the steel wire rope still brings larger vibration amplitude, so that the phase noise is obviously deteriorated. In addition, when the crystal oscillator is covered with the cover, the phase noise characteristics are also affected to some extent due to a change in the internal electromagnetic environment.
In order to solve the problems, an auxiliary vibration damping structure specially used for a crystal oscillator is designed, so that the interference of a vibration environment on the stability of the crystal oscillator can be reduced to the maximum extent, and meanwhile, the adverse effect caused by an electromagnetic effect can be shielded.
Disclosure of Invention
The application provides an auxiliary vibration damping device and method for a crystal oscillator, which solve the problem of phase noise deterioration of the crystal oscillator in a vibration environment; in particular, the prior art damping methods still have large vibration amplitudes.
The embodiment of the application provides an auxiliary vibration damping device for a crystal oscillator, which comprises a circuit board for bearing the crystal oscillator, a steel wire rope and a base; the middle part of the steel wire rope is fixedly connected with the circuit board, and two ends of the steel wire rope are fixed on the base; the weight of the circuit board is borne by a fixing point in the middle of the steel wire rope.
Preferably, the base pins are connected with the circuit board through wires, and the lengths of the wires do not limit the jitter of the circuit board.
Preferably, a shielding copper plate is disposed above the circuit board, and is connected to the circuit board and the base via metal screws.
Preferably, the crystal oscillator auxiliary vibration damping device further comprises a balancing weight; the balancing weight is fixedly connected with the circuit board, and the weight is born by a fixed point in the middle of the steel wire rope.
Further preferably, the fixing point in the middle of the steel wire rope is fixed on the balancing weight.
Further preferably, the weight block is fixed below the circuit board.
Further preferably, the balancing weight is made of metal copper, and the total amount of the balancing weight is 1-6 g.
In any embodiment of the crystal oscillator auxiliary vibration damping device, the distance between the fixed points at the two ends of the steel wire rope is smaller than the length of the steel wire rope, and the middle of the steel wire rope is arched upwards.
In any embodiment of the crystal oscillator auxiliary vibration damping device, the diameter of the steel wire rope is set to be phi 0.2 mm-phi 0.8 mm.
The embodiment of the application also provides an auxiliary vibration reduction method for the crystal oscillator, and the auxiliary vibration reduction device for the crystal oscillator is used in any embodiment of the application.
The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects:
the influence of vibration on the stability of the crystal oscillator is counteracted to the maximum extent, and the overall stability of the system is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a prior art damping structure for a circuit board directly fixed by a steel wire rope;
fig. 2 shows an auxiliary damping structure of a crystal oscillator for implementing the present invention.
In the figure, 1-screw, 2-shielding copper sheet, 3-nylon nut, 4-circuit board, 5-balancing weight, 6-steel wire rope, 7-lead, 8-base, 9-copper pipe
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.
The traditional vibration reduction method mainly comprises rubber vibration reduction or vibration reduction of a circuit board directly fixed by a steel wire rope. Among them, in the method using the wire rope, since the circuit board is light, the circuit board is directly fixed only by the wire rope. As shown in fig. 1, two ends of a steel wire rope are fixed on a circuit board, the middle of the steel wire rope penetrates through a copper pipe 9 and is welded on a base, the distance between the fixed positions at the two ends of the steel wire rope is smaller than the length of the steel wire rope, and the middle of the steel wire rope is arched downwards. This still brings about a large vibration amplitude, which significantly deteriorates the phase noise.
In addition, when the crystal oscillator is covered with the cover, the phase noise characteristics are also affected to some extent due to a change in the internal electromagnetic environment.
The embodiment of the present application is shown in fig. 2, a novel auxiliary damping structure of a crystal oscillator mainly includes: the device comprises a bolt 1, a shielding copper sheet 2, a nylon nut 3, a circuit board 4, a balancing weight 5, a steel wire rope 6, a lead 7, a base 8 and the like.
As a specific connection mode, the counterweight block is connected with four corners of the circuit board through screws; the shielding copper sheet is padded up through a nylon nut, and is fixed with the circuit board and the balancing weight together through a screw;
the best fixing scheme is as follows: the middle part of the steel wire rope is welded on the positioning bulge of the balancing weight, and two ends of the steel wire rope are welded in the positioning groove of the base.
The power supply, the ground and the output end on the circuit board are connected with the corresponding pins of the base through the leads 7 to realize electric connection.
The main body vibration damping method utilizes the steel wire rope to damp vibration, and the steel wire rope has good elastic performance and can play a certain role in buffering in a vibration state, so that the problem of performance index deterioration caused by rigid connection is avoided to a great extent. On this basis, add supplementary damping structure, increase the balancing weight for the circuit board promptly, wire rope plays the fixed stay effect through connecting the balancing weight. Due to the introduction of the balancing weight, on one hand, the overall weight is increased, so that the inertia is increased, and the displacement change in a vibration state is better resisted; on the other hand, wire rope and balancing weight welding are easier, and it is more reliable to fix, can make the assembly more convenient. Through simulation and test, the vibration reduction effects of different weight counter weights can be obtained, and too heavy counter weights are easy to press and deform the steel wire rope to generate inelastic deformation to influence the vibration reduction effect; if the weight is too light, the vibration reduction effect cannot be achieved, and therefore the influence of vibration on the stability of the crystal oscillator can be counteracted to the maximum extent by selecting the weight of the appropriate balancing weight.
Generally, for a crystal oscillator with the size of 36mm multiplied by 27mm, the diameter of a steel wire rope of the vibration damping structure is set to be phi 0.2 mm-phi 0.8 mm; the counter weight is made of metal copper, and the weight is set to be 1 g-6 g. The matching principle is as follows: when the circuit board and the balancing weight are heavy, the diameter of the steel wire rope is properly increased to achieve good supporting effect and elastic performance; and vice versa.
The shielding copper plate is added above the circuit board, and is connected with the circuit board and the base through the metal screw to be grounded, so that the effect of shielding electromagnetic effect can be achieved, after the outer cover is covered, the electromagnetic environment inside the outer cover is not affected, and further phase noise is not deteriorated.
The application also provides an auxiliary vibration damping method of the crystal oscillator, and the specific structure is not repeated by using the auxiliary device of the crystal oscillator. In particular, the damping method of the present application relates to the arrangement and specification of the wire rope and the counterweight. For example, the connection mode of the steel wire rope and the counterweight, the connection mode of the steel wire rope and the base, the height adjustment of the upward bow of the middle part of the steel wire rope, and the specification adjustment of the steel wire rope and the counterweight. The above steps are verified by the results of the vibration test.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. An auxiliary vibration damper for a crystal oscillator is characterized by comprising a circuit board for bearing the crystal oscillator, a steel wire rope and a base; the middle part of the steel wire rope is fixedly connected with the circuit board, and two ends of the steel wire rope are fixed on the base; the weight of the circuit board is borne by a fixing point in the middle of the steel wire rope.
2. An auxiliary vibration damping device for a crystal oscillator as defined in claim 1, further comprising a weight; the balancing weight is fixedly connected with the circuit board, and the weight is born by a fixed point in the middle of the steel wire rope.
3. The crystal oscillator auxiliary damping apparatus of claim 1, wherein the base pins are connected to the circuit board by wires, the length of the wires not limiting board jitter.
4. An auxiliary vibration damping device for a crystal oscillator according to claim 1, wherein a shielding copper plate is disposed above said circuit board and is connected to the circuit board and the base by metal screws to be grounded.
5. An auxiliary vibration damper for crystal oscillator as claimed in claim 2, characterized in that the fixing point of the middle part of said wire rope is fixed on the counterweight.
6. An auxiliary vibration dampener for a crystal oscillator according to claim 2, wherein said weight is secured beneath said circuit board.
7. An auxiliary vibration damper for a crystal oscillator according to any one of claims 1 to 6, wherein the distance between the fixing points at the two ends of the wire rope is less than the length of the wire rope, and the middle part of the wire rope is arched upwards.
8. An auxiliary vibration damper for a crystal oscillator according to any one of claims 2 and 5 to 6, wherein said weight member is made of copper metal and has a total weight of 1 to 6 g.
9. An auxiliary vibration damping device for a crystal oscillator according to any one of claims 1 to 6, wherein the diameter of the wire rope is set to be 0.2mm to 0.8 mm.
10. A method of assisting in damping vibration of a crystal oscillator, characterised by using a device as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011531742.9A CN112696456A (en) | 2020-12-22 | 2020-12-22 | Auxiliary vibration damping device and method for crystal oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011531742.9A CN112696456A (en) | 2020-12-22 | 2020-12-22 | Auxiliary vibration damping device and method for crystal oscillator |
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| Publication Number | Publication Date |
|---|---|
| CN112696456A true CN112696456A (en) | 2021-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011531742.9A Pending CN112696456A (en) | 2020-12-22 | 2020-12-22 | Auxiliary vibration damping device and method for crystal oscillator |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2400181A2 (en) * | 2010-06-22 | 2011-12-28 | Honeywell International, Inc. | Chassis mounting system |
| CN103944513A (en) * | 2014-04-29 | 2014-07-23 | 上海鸿晔电子科技有限公司 | Plum-blossom damping type shockproof constant-temperature crystal oscillator |
| CN104009754A (en) * | 2014-06-13 | 2014-08-27 | 上海理工大学 | Steel wire rope crystal oscillator damping device |
| CN203911899U (en) * | 2014-06-23 | 2014-10-29 | 成都世源频控技术有限公司 | Miniaturized vibration resistant structure of crystal oscillator |
| CN205226224U (en) * | 2015-12-17 | 2016-05-11 | 南京中电熊猫晶体科技有限公司 | Wire rope crystal oscillator damping structure |
| CN109687836A (en) * | 2018-11-21 | 2019-04-26 | 中国电子科技集团公司第三十八研究所 | A kind of miniaturization antivibration a reference source |
| CN210240432U (en) * | 2019-07-05 | 2020-04-03 | 上海鸿晔电子科技股份有限公司 | Steel wire shock-absorbing structure for crystal oscillator |
| CN210405977U (en) * | 2019-09-09 | 2020-04-24 | 昆山市千鹤电子有限公司 | Connecting structure of PCB (printed circuit board) |
| CN210670956U (en) * | 2019-10-31 | 2020-06-02 | 昆山汇仁氏电子有限公司 | PCB resistant to pressing |
| CN210739219U (en) * | 2019-08-24 | 2020-06-12 | 上海鸿晔电子科技股份有限公司 | Steel wire shock-absorbing structure |
-
2020
- 2020-12-22 CN CN202011531742.9A patent/CN112696456A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2400181A2 (en) * | 2010-06-22 | 2011-12-28 | Honeywell International, Inc. | Chassis mounting system |
| CN103944513A (en) * | 2014-04-29 | 2014-07-23 | 上海鸿晔电子科技有限公司 | Plum-blossom damping type shockproof constant-temperature crystal oscillator |
| CN104009754A (en) * | 2014-06-13 | 2014-08-27 | 上海理工大学 | Steel wire rope crystal oscillator damping device |
| CN203911899U (en) * | 2014-06-23 | 2014-10-29 | 成都世源频控技术有限公司 | Miniaturized vibration resistant structure of crystal oscillator |
| CN205226224U (en) * | 2015-12-17 | 2016-05-11 | 南京中电熊猫晶体科技有限公司 | Wire rope crystal oscillator damping structure |
| CN109687836A (en) * | 2018-11-21 | 2019-04-26 | 中国电子科技集团公司第三十八研究所 | A kind of miniaturization antivibration a reference source |
| CN210240432U (en) * | 2019-07-05 | 2020-04-03 | 上海鸿晔电子科技股份有限公司 | Steel wire shock-absorbing structure for crystal oscillator |
| CN210739219U (en) * | 2019-08-24 | 2020-06-12 | 上海鸿晔电子科技股份有限公司 | Steel wire shock-absorbing structure |
| CN210405977U (en) * | 2019-09-09 | 2020-04-24 | 昆山市千鹤电子有限公司 | Connecting structure of PCB (printed circuit board) |
| CN210670956U (en) * | 2019-10-31 | 2020-06-02 | 昆山汇仁氏电子有限公司 | PCB resistant to pressing |
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