CN109743056A - Satellite time transfer device - Google Patents
Satellite time transfer device Download PDFInfo
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- CN109743056A CN109743056A CN201910141624.8A CN201910141624A CN109743056A CN 109743056 A CN109743056 A CN 109743056A CN 201910141624 A CN201910141624 A CN 201910141624A CN 109743056 A CN109743056 A CN 109743056A
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- groove body
- partition wall
- heat
- circuit board
- upper cover
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- 238000012546 transfer Methods 0.000 title claims abstract description 37
- 239000010453 quartz Substances 0.000 claims abstract description 92
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 92
- 238000009434 installation Methods 0.000 claims abstract description 15
- 238000005192 partition Methods 0.000 claims description 101
- 238000009413 insulation Methods 0.000 claims description 61
- 239000013078 crystal Substances 0.000 claims description 37
- 238000003801 milling Methods 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 claims description 3
- 229910000679 solder Inorganic materials 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims 1
- 239000004575 stone Substances 0.000 claims 1
- 238000004891 communication Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 38
- 238000013461 design Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 5
- 238000005457 optimization Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000037237 body shape Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000005439 thermosphere Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L1/00—Stabilisation of generator output against variations of physical values, e.g. power supply
- H03L1/02—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only
- H03L1/04—Constructional details for maintaining temperature constant
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- Oscillators With Electromechanical Resonators (AREA)
Abstract
The invention belongs to communication product technical field more particularly to a kind of satellite time transfer devices.The satellite time transfer device, including circuit board, upper cover and quartz oscillator, upper cover is covered on circuit board and encloses to set to form installation cavity with circuit board, the surface of circuit board is equipped with heat dam, supporting element is provided in heat dam, quartz oscillator is fixed on supporting element and is located in installation cavity, and heat-insulated air layer is formed between quartz oscillator and the slot bottom of heat dam.In this way, by opening up heat dam on circuit boards, make the heat-insulated air layer in heat dam that circuit board be replaced to carry out heat transfer and conduction, since the thermal coefficient of air is less than the thermal coefficient of circuit board, so, the thermal resistance that heat exchanges is carried out between quartz oscillator and external environment to become larger, and so as to reduce influence of the external air flow to quartz oscillator temperature, improves the temperature stability of quartz oscillator.
Description
Technical field
The invention belongs to communication product technical field more particularly to a kind of satellite time transfer devices.
Background technique
With the fast development of computer network, network application is very universal, and network system is to time synchronization
Accuracy requirements are also higher and higher, such as electric power, finance, communication, traffic, national defence field network system need in a wide range of
Keep the synchronousness and time accuracy of computer.It is well known that utilizing the GNSS radio satellite signals energy such as GPS, Beidou
It enough realizes round-the-clock, all the period of time and high-precision time service operation, the time high unity between distinct device, time service can be made
Precision was up to for tens nanoseconds.
Based on the time service device of above-mentioned satellite time transfer principle, the internal clocking that time service is be unable to do without inside device is operated normally
Source；The high-precision operation of internal clock source then mainly provides the quartz oscillator (abbreviation crystal oscillator) of clock signal with its inside
It is closely related.Generally, the crystal oscillator that internal clock source is often used include commonly have source crystal oscillator, temperature compensating crystal oscillator, voltage controlled crystal oscillator and
Constant-temperature crystal oscillator etc., since these internal clock sources are all electronic types, the stability and accuracy of work more or less all can
It is affected by the ambient temperature.
In the prior art, temperature compensating crystal oscillator, voltage controlled crystal oscillator or constant-temperature crystal oscillator are often used to avoid or reduce external environment temperature
Spend the influence to time service device, wherein constant-temperature crystal oscillator stability is high, but bulky and price is relatively high；Voltage controlled crystal oscillator needs
Additional closed-loop control system is wanted to control, stability depends on closed-loop control system；Temperature compensating crystal oscillator is small in size, and price is relatively
Low, high stability, the typical frequencies temperature characterisitic for being usually used in the temperature compensating crystal oscillator of navigation equipment is ± 0.5ppm, but for
For time service device, frequency stability of temperature is still slightly inadequate.
Summary of the invention
The purpose of the present invention is to provide a kind of satellite time transfer devices, it is intended to solve satellite time transfer device in the prior art
The technical issues of temperature of interior quartz oscillator is influenced vulnerable to external air flow and ambient temperature.
To achieve the above object, the technical solution adopted by the present invention is that: a kind of satellite time transfer device, including circuit board, on
Lid and quartz oscillator, upper cover are covered on circuit board and enclose with circuit board and set to form installation cavity, and circuit board is towards upper
The surface of lid is equipped with the heat dam being located in upper cover orthographic projection, is provided with supporting element in heat dam, quartz oscillator is fixed
In on supporting element and being located in installation cavity, and heat-insulated air layer is formed between quartz crystal and the slot bottom of heat dam.
Further, heat dam includes the first groove body, and supporting element, which is included in, is separated out the first of the first groove body in heat dam
Partition wall and the second partition wall, quartz oscillator are covered on the first groove body and consolidate with the first partition wall and the second partition wall
Fixed connection, quartz oscillator, the first groove body and circuit board, which enclose to set, is formed with the first heat-insulation chamber.
Further, heat dam further includes the second groove body, and supporting element further includes in being separated out the second groove body in heat dam
Third partition wall and the 4th partition wall, the first groove body have the first end and second end that is oppositely arranged, and the second groove body is set to the
The first end of one groove body simultaneously extends to the other end, the first end phase at the middle part of the second groove body and the first groove body from one end of circuit board
The end of connection, third partition wall towards the first groove body is connected with the end of the first partition wall towards the second groove body, and the 4th separates
The end of wall towards the first groove body is connected with the end of the second partition wall towards the second groove body, upper cover, the second groove body and circuit board
It encloses to set and is formed with the second heat-insulation chamber.
Further, heat dam further includes third groove body, and supporting element further includes in being separated out third groove body in heat dam
5th partition wall and the 6th partition wall, third groove body be set to the second end of the first groove body and have the first end that is oppositely arranged and
Second end；The first end of third groove body is connected with the second end of the first groove body, the end of the 5th partition wall the first groove body of direction
It is connected with the end of the first partition wall towards third groove body, end and second partition wall court of the 6th partition wall towards the first groove body
Be connected to the end of third groove body, the second end of third groove body extends towards the direction away from the first groove body, upper cover, third groove body and
Circuit board, which encloses to set, is formed with third heat-insulation chamber.
Further, heat dam further includes the 4th groove body and the 5th groove body for being respectively arranged at the first groove body two sides, third
Partition wall, the first partition wall and the 5th partition wall are sequentially connected in being separated out the 4th groove body, the 4th partition wall, second in heat dam
Partition wall and the 6th partition wall are sequentially connected in being separated out the 5th groove body in heat dam, and upper cover, the 4th groove body and circuit board are enclosed and set
The 4th heat-insulation chamber is formed, upper cover, the 5th groove body and circuit board enclose and set to form the 5th heat-insulation chamber.
Further, the upper surface of the first partition wall face upper cover and the upper surface of the second partition wall face upper cover are respectively provided with
There is pad, quartz oscillator is fixed with pad solder.
Further, the quantity at least two of pad, and at least described first is respectively arranged at there are two the pad
On partition wall and second partition wall.
Further, satellite time transfer device further includes at least two for being electrically connected quartz oscillator and circuit board
Connecting wire, and the first end of at least two connecting wires respectively it is corresponding at least two pads welding, each connecting wire
Second end respectively along third partition wall, the 4th partition wall, the 5th partition wall or the 6th partition wall be extended.
Further, heat dam be on circuit board use controlled depth milling slot method made of deep groove.
Further, upper cover and welding circuit board, alternatively, upper cover is connect with circuit board by fastener.
Beneficial effects of the present invention: satellite time transfer device of the invention is used to install the circuit of quartz oscillator
Heat dam is offered on plate, supporting element is provided in heat dam, and quartz oscillator is fixed on supporting element and is accommodated in
In installation cavity, at this point, heat-insulated air layer is capable of forming between quartz oscillator and circuit board, that is, in quartz-crystal
One layer of heat preservation layer is provided between oscillation body device and circuit board.In this way, being made in heat dam by opening up heat dam on circuit boards
Heat-insulated air layer replace circuit board to carry out heat transfer and conduction, since the thermal coefficient of air is less than the thermally conductive system of circuit board
Number becomes larger in this way, carrying out the thermal resistance that heat exchanges between quartz oscillator and external environment, at this point, logical compared to directly
Oversampling circuit plate carries out heat transfer, heat dam is arranged and after constructing heat-insulated air layer, quartz oscillator and external environment it
Between heat exchange resistance become larger, rate of heat exchange reduce, vibrated so as to reduce external air flow to quartz crystal in installation cavity
It is quasi- to promote quartz oscillator work for the influence of the temperature of device, the effective temperature stability for improving quartz oscillator
True property.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is the structural schematic diagram of satellite time transfer device provided in an embodiment of the present invention；
Fig. 2 is the decomposition view of satellite time transfer device provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of the circuit board of satellite time transfer device provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of the supporting element on the circuit board of satellite time transfer device provided in an embodiment of the present invention.
Wherein, each appended drawing reference in figure:
10-circuit board 11-heat dam, 20-upper covers
30-quartz oscillator 40-pad, 50-connecting wires
111-the first groove body the 112-the second groove body 113-third groove body
114-the four 115-the five 116-supporting element of groove body of groove body
1161-the first partition wall the 1162-the second partition wall 1163-third partition wall
1164-the four partition wall the 1166-the six partition wall of the 1165-the five partition wall.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment that Fig. 1~4 is described is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term " length ", " width ", "upper", "lower", "front", "rear",
The orientation or positional relationship of the instructions such as "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on attached drawing institute
The orientation or positional relationship shown, is merely for convenience of description of the present invention and simplification of the description, rather than the dress of indication or suggestion meaning
It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to limit of the invention
System.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
As shown in figures 1-4, one embodiment of the invention provides a kind of satellite time transfer device, including circuit board 10, upper cover
20 and quartz oscillator 30, wherein circuit board 10 is pcb board, is electrically connected with quartz oscillator 30, and the two
Between be able to carry out the transmitting of electric signal such as clock signal etc., upper cover 20 in protection circuit plate 10 as quartz crystal vibrates
The electronic component of device 30 etc..Specifically, upper cover 20 is covered on circuit board 10 and encloses with circuit board 10 and sets to form installation cavity (figure
Do not show), circuit board 10 is equipped with the heat dam 11 being located in 20 orthographic projection of upper cover towards the surface of upper cover 20, is arranged in heat dam 11
There is supporting element 116, quartz oscillator 30 is fixed on supporting element 116 and is located in installation cavity, and quartz crystal vibrates
Heat-insulated air layer (not shown) is formed between device 30 and the slot bottom of heat dam 11.
The satellite time transfer device of the embodiment of the present invention, is used to install and opens up on the circuit board 10 of quartz oscillator 30
There is heat dam 11, supporting element 116 is provided in heat dam, quartz oscillator 30 is fixed on supporting element 116 and is received
In in installation cavity, at this point, heat-insulated air layer is capable of forming between quartz oscillator 30 and circuit board 10, that is,
One layer of heat preservation layer is provided between quartz oscillator 30 and circuit board 10.In this way, heat-insulated by opening up on the circuit board 10
Slot 11 makes the heat-insulated air layer in heat dam 11 that circuit board 10 be replaced to carry out heat transfer and conduction, due to the thermally conductive system of air
Number much smaller than circuit board 10 thermal coefficient (the former thermal coefficient be less than or only the latter's thermal coefficient 1/10th), such as
This, carries out the thermal resistance that heat exchanges and becomes larger, at this point, compared to electricity is directly passed through between quartz oscillator 30 and external environment
Road plate 10 carries out heat transfer, after heat dam 11 is set and constructs heat-insulated air layer, quartz oscillator 30 and external environment
Between heat exchange resistance become larger, rate of heat exchange reduce, shake so as to reduce external air flow to quartz crystal in installation cavity
The influence of the temperature of device 30 is swung, the effective temperature stability for improving quartz oscillator 30 promotes quartz oscillator
30 work accuracys.In this way, by opening up heat dam 11 on the circuit card 1, when the internal clock source of time service device is using common
When having source crystal oscillator, heat dam 11, which can be improved, commonly has source crystal oscillator to resist the ability that external air flow and temperature influence, to improve
Its job stability, and when the internal clock source of time service device is using temperature compensating crystal oscillator, voltage controlled crystal oscillator or constant-temperature crystal oscillator, heat dam
11 can match with temperature compensating crystal oscillator or constant-temperature crystal oscillator, further improve its job stability.
Specifically, above-mentioned quartz oscillator 30 is commonly to have source crystal oscillator, temperature compensating crystal oscillator, voltage controlled crystal oscillator or constant temperature
Any one in crystal oscillator, when use, can be selected according to the actual situation, not do unique restriction herein.
Preferably, the size of above-mentioned heat dam 11 can carry out individual Modeling and Design by modeling and simulating software,
In this way, optimizing every design parameter of heat dam 11 by modeling software, the groove body shape and fluting of heat dam 11 are such as adjusted
Depth etc. reduces air heat-insulation layer so as to adjust the heat insulation parameter with the air heat-insulation layer formed inside optimization heat dam 11
Thermal coefficient increases the thermal resistance between quartz oscillator 30 and external environment, improves heat dam 11 and its air heat-insulation layer
To the heat-insulated and heat insulation effect of quartz oscillator 30.
In another embodiment of the invention, as shown in figs. 2 to 4, heat dam 11 includes the first groove body 111, supporting element 116
It is included in the first partition wall 1161 and the second partition wall 1162 that the first groove body 111 is separated out in heat dam 11, quartz crystal vibration
Device 30 is swung to be covered on the first groove body 111 and be fixedly connected with the first partition wall 1161 and the second partition wall 1162, quartz crystal
Oscillator 30, the first groove body 111 and circuit board 10, which enclose to set, is formed with the first heat-insulation chamber (not shown).
Specifically, 111 face quartz oscillator 30 of the first groove body is arranged, and quartz oscillator 30 is covered on first
On groove body 111, the bottom margin and the first partition wall 1161 of 30 face circuit board 10 of quartz oscillator and the second partition wall
1162 are fixedly connected with (i.e. the outer edge of 111 notch of the first groove body is fixedly connected), at this point, quartz oscillator 30, the first slot
Body 111 and circuit board 10, which enclose, to be set to form the first heat-insulation chamber, and the first heat-insulation chamber content empties gas to form heat-insulated air layer, in this way,
Quartz oscillator 30 and external air flow along the vertical direction on heat exchange need to be by the heat-insulated air in the first heat-insulation chamber
Layer is conducted, and the lesser heat-insulated air layer of thermal coefficient replaces the biggish circuit board 10 of thermal coefficient to carry out heat conduction, is made
The vertical thermally conductive resistance of quartz oscillator 30 increases, to effectively reduce external air flow to the satellite time transfer device of this implementation
The temperature of interior quartz oscillator 30 influences, and is conducive to the temperature stability and work accuracy of quartz oscillator 30
Raising.
Preferably, the size of the first groove body 111 can carry out individual Modeling and Design by modeling and simulating software, such as
This, by modeling software optimize the first groove body 111 every design parameter, such as adjust the first groove body 111 groove body shape and
Groove depth etc., so as to adjust the sky in the cavity geometry with the first heat-insulation chamber of optimization and size, the first heat-insulation chamber of optimization
The heat insulation parameter of air bound thermosphere, reduce vertical direction on air heat-insulation layer thermal coefficient, increase quartz oscillator 30 with
Thermal resistance between external environment improves the first groove body 111 and its inner air thermal insulation layer to the heat-insulated of quartz oscillator 30
And heat insulation effect.
In another embodiment of the invention, as shown in figs. 2 to 4, heat dam 11 further includes the second groove body 112, supporting element
116 further include in the third partition wall 1163 and the 4th partition wall 1164 that are separated out the second groove body 112 in heat dam 11, the first slot
Body 111 has the first end and second end that is oppositely arranged, and the second groove body 112 is set to the first end of the first groove body 111 and from electricity
One end of road plate 10 extends to the other end, and the middle part of the second groove body 112 is connected with the first end of the first groove body 111, third point
The end of next door 1163 towards the first groove body 111 is connected with the end of the first partition wall 1161 towards the second groove body 112, and the 4th point
The end of next door 1164 towards the first groove body 111 is connected with the end of the second partition wall 1162 towards the second groove body 112, upper cover
20, the second groove body 112 and circuit board 10, which enclose to set, is formed with the second heat-insulation chamber (not shown), and the second heat-insulation chamber can accommodate air and shape
At heat-insulated air layer, alternatively, the second heat-insulation chamber is connected with the first heat-insulation chamber, heat-insulated air layer extends into from the first heat-insulation chamber
In two heat-insulation chambers.In this way, the second groove body 112 being connected to by setting with the first groove body 111, by 30 one end of quartz oscillator
Circuit board 10 be arranged to for heat-insulated air layer extend the second heat-insulation chamber, further to extend the covering of heat-insulated air layer
Area increases the thermal resistance of 30 side of quartz oscillator, especially increases quartz oscillator 30 along circuit board 10
Length direction (or width direction) carries out the thermal resistance of hot transmitting, further decrease quartz oscillator 30 by external air flow and
A possibility that generating temperature change improves the temperature stability of quartz oscillator 30.
It should be noted that the middle part of second groove body 112 can not also be in some other embodiments of the invention
One groove body 111 is connected, i.e., third partition wall 1163 towards the end of the first groove body 111 directly with 1164 direction of the 4th partition wall
The end of first groove body 111 is connected, at this point, third groove body 113 and the first setting independently of one another of groove body 111.
Further, as shown in figs. 2 to 4, heat dam 11 further includes third groove body 113, and supporting element 116 further includes in heat-insulated
The 5th partition wall 1165 and the 6th partition wall 1166 of third groove body 113 are separated out in slot 11, third groove body 113 is set to first
The second end of groove body 111 and same there is the first end and second end being oppositely arranged；The first end of third groove body 113 and the first slot
The second end of body 111 is connected, and the 5th partition wall 1165 is towards the end of the first groove body 111 and the first partition wall 1161 towards the
The ends of three groove bodies 113 is connected, and the 6th partition wall 1166 is towards the end of the first groove body 111 and the second partition wall 1162 towards the
The ends of three groove bodies 113 is connected, and the second end of third groove body 113 extends towards the direction away from the first groove body 111, upper cover 20, the
Three groove bodies 113 and circuit board 10, which enclose to set, is formed with third heat-insulation chamber (not shown), third heat-insulation chamber can accommodate air and formed every
Hot air layer, alternatively, third heat-insulation chamber is also connected with the first heat-insulation chamber, heat-insulated air layer can equally extend from the first heat-insulation chamber
To third heat-insulation chamber.The third slot being connected to the first groove body 111 is equally set in the other end of quartz oscillator 30
Body 113 increases in this way, can further extend the area coverage of heat-insulated air layer on the basis of the second groove body 112
The thermal resistance of 30 side of quartz oscillator especially increases the heat that quartz oscillator 30 transversely carries out hot transmitting
Resistance improves quartz-crystal further to reduce a possibility that quartz oscillator 30 is generated temperature change by external air flow
The temperature stability of oscillation body device 30.
It should be noted that in some other embodiments of the invention, the first end of third groove body 113 can not also be with
The second end of first groove body 111 is connected, at this point, third groove body 113 and the first setting independently of one another of groove body 111.
Preferably, the size of above-mentioned second groove body 112 and third groove body 113 again may be by modeling and simulating software
Modeling and Design is carried out in conjunction with the design parameter of the first groove body 111, in this way, optimizing the second groove body 112 and third by modeling software
Every design parameter of groove body 113, so as to adjust the heat-insulated ginseng of the air heat-insulation layer with optimization 30 side of quartz oscillator
Number reduces the thermal coefficient of air heat-insulation layer in horizontal direction, further increases quartz oscillator 30 and external environment
Between thermal resistance, to improve the second groove body 112, third groove body 113 and its inner air thermal insulation layer to quartz oscillator 30
Heat-insulated and heat insulation effect.
Further, as shown in figs. 2 to 4, heat dam 11 further includes be respectively arranged at 111 two sides of the first groove body the 4
Groove body 114 and the 5th groove body 115, third partition wall 1163, the first partition wall 1161 and the 5th partition wall 1165 be sequentially connected in
The 4th groove body 114 is separated out in heat dam 11, the 4th partition wall 1164, the second partition wall 1162 and the 6th partition wall 1166 are successively
Be connected in heat dam 11 and be separated out the 5th groove body 115, upper cover 20, the 4th groove body 114 and circuit board 10 enclose set to be formed the 4th every
Hot chamber (not shown), upper cover 20, the 5th groove body 115 and circuit board, which enclose, to be set to form the 5th heat-insulation chamber (not shown), the 4th heat-insulation chamber
Air can be accommodated with the 5th heat-insulation chamber and forms heat-insulated air layer.In this way, passing through the 4th groove body 114 of setting and the 5th groove body
115, can further expansion air heat-insulation layer area coverage, increase by 30 side of quartz oscillator thermal resistance,
Heat dam 11 and its inner air thermal insulation layer are preferably improved to the insulation effect of quartz oscillator 30.Also, to the 4th
The design parameter of groove body 114 and the 5th groove body 115 again may be by modeling and simulating software in conjunction with the first groove body 111, the second slot
The design parameter of body 112 and third groove body 113 optimizes, to provide optimal thermal resistance value and maximally reduce
Influence of the external air flow to quartz oscillator 30 maintains the temperature stability of quartz oscillator 30.
It should be noted that in some other embodiments of the invention, the 4th heat-insulation chamber and the 5th heat-insulation chamber can also be with
It is connected respectively at least one of the first heat-insulation chamber, the second heat-insulation chamber or third heat-insulation chamber, at this point, heat-insulated air layer is from
One heat-insulation chamber (the second heat-insulation chamber or third heat-insulation chamber) is extended into respectively in the 4th heat-insulation chamber and the 5th heat-insulation chamber.
And the upper table of 1161 face upper cover of the first partition wall in another embodiment of the invention, as shown in Figures 2 and 3,
The upper surface of 1162 face upper cover 20 of face and the second partition wall is provided with pad 40, and quartz oscillator 30 and pad 40 weld
Fixation is connect, so that quartz oscillator 30 is fixed on circuit board 10.
Preferably, the quantity at least two of pad 40, and at least the first partition wall is respectively arranged at there are two pad 40
1161 and second on partition wall 1162, i.e. a pad 40 is set to the first groove body 111 outside the notch of the 4th groove body 114
Edge, another pad 40 are then set to the first groove body 111 close to the notch outer edge of the 5th groove body 115, in this way, quartz crystal vibrates
The opposite two sides of device 30 respectively pass through a pad 40 and the notch edges of the first groove body 111 are welded, to make quartz crystal
Oscillator 30 is stable to be covered on the first groove body 111, gives full play to air heat-insulation layer to the heat-insulated of quartz oscillator 30
Insulation effect.
It is highly preferred that in the present embodiment, as shown in Fig. 2, the quantity of pad is four, wherein two pads 40 are set to
On first partition wall 1161, in addition two pads 40 are set on the second partition wall 1162, i.e. two settings in four pads 40
In the first groove body 111 close to the notch outer edge of the 4th groove body 114, other two is then set to the first groove body 111 close to the 5th
The notch outer edge of groove body 115, in this way, the bottom four corners of quartz oscillator 30 respectively pass through a pad 40 and the first groove body
111 notch edges welding, preferably to improve the mounting stability of quartz oscillator 30.
In another embodiment of the invention, as shown in Figures 2 and 3, satellite time transfer device further includes at least two and is used for
It is electrically connected the connecting wire 50 of quartz oscillator 30 and circuit board 10, and the first end of at least two connecting wires 50
Welding corresponding at least two pads 40 respectively, the second end of each connecting wire 50 is respectively along third partition wall 1163, the 4th point
Next door 1164, the 5th partition wall 1165 or the 6th partition wall 1166 are extended.
Preferably, above-mentioned connecting wire 50 is the copper conductor that cross-sectional area is relatively small and length is relatively long.Generally
Ground, since the thermal coefficient of copper is relatively large, thermal resistance is relatively small, however, the temperature in order to guarantee quartz oscillator 30
Stability needs to increase as far as possible the thermal resistance of connecting wire 50；Specifically, according to single layer structure thermal resistance formula R=δ/(λ A)
(in formula, R is thermal resistance value (k/w), and δ is the layer thickness (m) of heat-transfer path, and λ is material thermal conductivity [W/ (mk)], and A is
Perpendicular to the material cross-section product (m^2) of heat-transfer path), accordingly as can be seen that reducing the cross-sectional area of connecting wire 50, simultaneously
The length for increasing connecting wire 50, is capable of increasing the thermal resistance of connecting wire 50.Therefore, the present embodiment select cross-sectional area it is smaller,
The longer copper conductor of length increases the thermal resistance of connecting wire 50 with this as connecting wire 50.
Preferably, every design parameter of connecting wire 50 again may be by modeling and simulating software and optimize,
To select optimal length, cross-sectional area and the shape of connecting wire 50 etc., the thermal coefficient of Lai Pingheng connecting wire 50 is posted
The design parameters such as raw inductance, 10 actual fabrication situation of D.C. resistance and circuit board, to provide the thermal resistance of connecting wire 50 most
The figure of merit.
Specifically, the setting quantity of above-mentioned connecting wire 50 is less than or equal to the setting quantity of pad 40 when the two setting
When quantity is identical, a pad 40 is correspondingly connected with a connecting wire 50, i.e., the first end of each connecting wire 50 and each pad 40
Correspond welding；And when the setting quantity of connecting wire 50 be less than pad 40 setting quantity when, not with connecting wire 50
Connected pad 40 is only used for being welded and fixed for quartz oscillator 30.
Preferably, as shown in Fig. 2, the quantity of pad 40 is preferably 4, the quantity correspondence of connecting wire 50 is preferably arranged to
Four, and the first end of four connecting wires 50 corresponds with four pads 40 weld respectively, the of four connecting wires 50
Two ends are set along the extension of third partition wall 1163, the 4th partition wall 1164, the 5th partition wall 1165 or the 6th partition wall 1166 respectively
It sets, so that it is guaranteed that quartz oscillator 30 is stably connected with.
In another embodiment of the invention, as shown in figs. 2 to 4, heat dam 11 preferably on circuit board 10 using control
Deep groove made of deep groove milling method.Using controlled depth milling slot technology in the heat dam of machine-shaping the present embodiment on circuit board 10
11, it can be ensured that the machining accuracy of heat dam 11, also, processed using controlled depth milling slot technology, when processing will not destroy electricity
The structural intergrity on the surface away from quartz oscillator 30 of road plate 10 will not make heat dam 11 through whole circuit board
10, it can be ensured that integrality of the circuit board 10 away from the outer surface of quartz oscillator 30.
Specifically, as shown in Figure 3 and Figure 4, the present embodiment is using controlled depth milling slot processing technology in milling respectively on circuit board 10
The first above-mentioned groove body 111, the second groove body 112, third groove body 113, the 4th groove body 114 and the 5th groove body 115 out, and in circuit
Above-mentioned supporting element 116 is formed on plate 12.
In another embodiment of the invention, as depicted in figs. 1 and 2, upper cover 20 and circuit board 10 weld, alternatively, upper cover
20 are connect with circuit board 10 by fastener；Setting upper cover 20 is covered on circuit board 10, and quartz oscillator 30 is pacified
It encloses and is set in the installation cavity to be formed mounted in upper cover 20 and circuit board 10, to protect quartz oscillator 30, reduce external air flow
Influence to 30 temperature of quartz oscillator.
Preferably, it when upper cover 20 is covered on circuit board 10, is formed between upper cover 20 and quartz oscillator 30
Spacing distance between the lesser gap of height dimension, i.e. upper cover 20 and quartz oscillator 30 is relatively small, with as far as possible
The entire installation cavity of reduction in air especially heat dam 11 in air convection current is carried out by the gap, thus preferably
Guarantee the heat insulation of the heat-insulated air layer of thin layer in heat dam 11.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of satellite time transfer device, it is characterised in that: including circuit board, upper cover and quartz oscillator, the upper cover lid
It encloses to set to form installation cavity together on the circuit board and with the circuit board, the surface of the circuit board towards the upper cover is set
There is the heat dam being located in the upper cover orthographic projection, supporting element is provided in the heat dam, the quartz oscillator is solid
Due on the supporting element and be located at the installation cavity in, between the quartz oscillator and the slot bottom of the heat dam
It is formed with heat-insulated air layer.
2. satellite time transfer device according to claim 1, it is characterised in that: the heat dam includes the first groove body, described
Supporting element is included in the first partition wall and the second partition wall that first groove body is separated out in the heat dam, the quartz-crystal
Oscillation body device is covered on first groove body and is fixedly connected with first partition wall and second partition wall, the stone
English crystal oscillator, first groove body and the circuit board, which enclose to set, is formed with the first heat-insulation chamber.
3. satellite time transfer device according to claim 2, it is characterised in that: the heat dam further includes the second groove body, institute
Stating supporting element further includes in the third partition wall and the 4th partition wall that are separated out second groove body in the heat dam；Described
One groove body has the first end and second end that is oppositely arranged, second groove body be set to the first end of first groove body and from
One end of the circuit board extends to the other end, and the middle part of second groove body is connected with the first end of first groove body,
The third partition wall is towards end and first partition wall of first groove body towards the end phase of second groove body
Even, the 4th partition wall is towards the end of first groove body and second partition wall towards the end of second groove body
It is connected；The upper cover, second groove body and the circuit board, which enclose to set, is formed with the second heat-insulation chamber.
4. satellite time transfer device according to claim 3, it is characterised in that: the heat dam further includes third groove body, institute
Stating supporting element further includes in the 5th partition wall and the 6th partition wall that are separated out the third groove body in the heat dam described
Three groove bodies are set to the second end of first groove body and have the first end and second end being oppositely arranged；The third groove body
First end is connected with the second end of first groove body, the 5th partition wall towards first groove body end with it is described
First partition wall is connected towards the end of the third groove body, end and institute of the 6th partition wall towards first groove body
It states the second partition wall to be connected towards the end of the third groove body, the second end of the third groove body is towards away from first groove body
Direction extend；The upper cover, the third groove body and the circuit board, which enclose to set, is formed with third heat-insulation chamber.
5. satellite time transfer device according to claim 4, it is characterised in that: the heat dam further includes being respectively arranged at institute
State the 4th groove body and the 5th groove body of the first groove body two sides, the third partition wall, first partition wall and 5th point described
Next door is sequentially connected in being separated out the 4th groove body in the heat dam, the 4th partition wall, second partition wall and
6th partition wall is sequentially connected in being separated out the 5th groove body, the upper cover, the 4th groove body in the heat dam
It is enclosed with the circuit board and sets to form the 4th heat-insulation chamber, the upper cover, the 5th groove body and the circuit board enclose and set to form the 5th
Heat-insulation chamber.
6. satellite time transfer device according to claim 5, it is characterised in that: upper cover described in the first partition wall face
The upper surface of upper cover described in upper surface and the second partition wall face is provided with pad, the quartz oscillator and institute
Pad solder is stated to fix.
7. satellite time transfer device according to claim 6, it is characterised in that: the quantity at least two of the pad, and
At least it is respectively arranged on first partition wall and second partition wall there are two the pad.
8. satellite time transfer device according to claim 7, it is characterised in that: the satellite time transfer device further includes at least two
Root is used to be electrically connected the connecting wire of the quartz oscillator Yu the circuit board, and at least two connections are led
The first end of line is corresponding at least two pads respectively to weld, and the second end of each connecting wire is respectively along the third
Partition wall, the 4th partition wall, the 5th partition wall or the 6th partition wall are extended.
9. described in any item satellite time transfer devices according to claim 1~8, it is characterised in that: the heat dam is Yu Suoshu
Using deep groove made of controlled depth milling slot method on circuit board.
10. described in any item satellite time transfer devices according to claim 1~8, it is characterised in that: the upper cover and the circuit
Plate welding, alternatively, the upper cover is connect with the circuit board by fastener.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910141624.8A CN109743056B (en) | 2019-02-26 | 2019-02-26 | Satellite time service device |
| PCT/CN2019/126668 WO2020173193A1 (en) | 2019-02-26 | 2019-12-19 | Satellite time transfer device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910141624.8A CN109743056B (en) | 2019-02-26 | 2019-02-26 | Satellite time service device |
Publications (2)
| Publication Number | Publication Date |
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| CN109743056A true CN109743056A (en) | 2019-05-10 |
| CN109743056B CN109743056B (en) | 2024-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910141624.8A Active CN109743056B (en) | 2019-02-26 | 2019-02-26 | Satellite time service device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109743056B (en) |
| WO (1) | WO2020173193A1 (en) |
Cited By (4)
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| CN111580135A (en) * | 2020-05-27 | 2020-08-25 | 上海锐伟电子科技有限公司 | Method and structure for reducing GPS drift |
| WO2020173193A1 (en) * | 2019-02-26 | 2020-09-03 | 泰斗微电子科技有限公司 | Satellite time transfer device |
| CN114296337A (en) * | 2021-12-29 | 2022-04-08 | 湖南国科微电子股份有限公司 | High-precision time service frequency-granting receiver |
| CN115842529A (en) * | 2023-02-17 | 2023-03-24 | 中国科学院苏州纳米技术与纳米仿生研究所 | Packaging structure and packaging method of crystal oscillator element |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN109743056B (en) | 2024-06-11 |
| WO2020173193A1 (en) | 2020-09-03 |
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