CN207995119U - 2.4G wireless bridge devices and its in bad electromagnetic field environment moderate resistance electromagnetic interference system - Google Patents
2.4G wireless bridge devices and its in bad electromagnetic field environment moderate resistance electromagnetic interference system Download PDFInfo
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- CN207995119U CN207995119U CN201820181627.5U CN201820181627U CN207995119U CN 207995119 U CN207995119 U CN 207995119U CN 201820181627 U CN201820181627 U CN 201820181627U CN 207995119 U CN207995119 U CN 207995119U
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- chip
- power supply
- master chip
- power
- wireless bridge
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The utility model discloses a kind of 2.4G wireless bridge devices in bad electromagnetic field environment moderate resistance electromagnetic interference system, it includes power module, watchdog chip, master chip, master chip output end is separately connected memory and power amplifier, the power input of power module is connect by pi type filter with power supply chip, power supply chip is respectively watchdog chip and master chip power supply, power supply circuit between power supply chip output end and master chip is turned on or off by PMOS tube, the input terminal of PMOS tube is connect with watchdog circuit, the input terminal of watchdog circuit is connect with master chip, PMOS tube output end exports two-way voltage and current, voltage and current is connect through power conversion chip with master chip all the way, another way voltage and current is to power amplifier.The system can effectively reduce 2.4G wireless bridges and occur the generation for phenomena such as crashing, restarting in the environment of bad electromagnetic field so that data transmission is stablized, and maintenance cost is reduced.
Description
Technical field
The utility model is related to radio transmission technical field, especially a kind of 2.4G wireless bridge devices and its in severe electricity
Magnetic field environment moderate resistance electromagnetic interference system.
Background technology
With the development of technology of Internet of things, Radio Transmission Technology being popularized and applying in the work and life of people
Increasingly occupy an leading position.The bridge that communication is set up in wireless transmission by wireless bridge between two or more networks realizes biography
Defeated purpose.Wireless bridge device is operated in the frequency range for exempting to apply wireless license of 2.4G or 5.8G, thus than other cable networks
The more convenient deployment of equipment.Especially the application of 2.4G wireless bridge devices is then more prominent.But 2.4G wireless bridge device sheets
The anti-electromagnetic-radiation interference of body is poor, and (such as electric field, photovoltaic plant, elevator(lift) machine room) is easy out in severe electromagnetic environment
The problems such as existing equipment crashes, restarts, undesirable experience is brought to user.
Ensured various by, 2.4G wireless bridge devices needs to the experience sense of people to promote 2.4G wireless bridge devices
It can be applicable in environment, (such as electric field, photovoltaic plant, elevator(lift) machine room) can also be protected especially in severe electromagnetic environment
Keep steady fixed operation and work.
There are many kinds of schemes for the anti-electromagnetic-radiation technology of 2.4G wireless bridge devices in the prior art, but generally increase
After electromagnetic radiation resisting function, performance is unstable, need to often repair, and causes maintenance manpower cost and equipment cost high, for
For enterprise, cost performance is not high.
Utility model content
A kind of in order to overcome the deficiencies of the prior art, the utility model provides 2.4G wireless bridge devices are in severe magnetic field
Environment moderate resistance electric radiation interference system, which can effectively reduce 2.4G wireless bridges occurs extremely in the environment of bad electromagnetic field
Machine, the generation for phenomena such as restarting so that data can reliablely and stablely upload to platform, reduce inspection and the dimension of maintenance staff
It repaiies, enables a device to long-time stable reliability service and inspection-free, effectively reduce cost.
To achieve the goals above, the technical solution adopted in the utility model is：A kind of 2.4G wireless bridge devices are being disliked
Bad electromagnetic field environment moderate resistance electromagnetic interference system, including power module, watchdog chip, master chip, master chip output end
It is separately connected memory and power amplifier, it is characterised in that：The power module includes power input and power supply chip, electricity
Source input terminal is connect by pi type filter with power supply chip, and power supply chip output end is respectively that watchdog chip and master chip supply
Electricity, power supply circuit between the power supply chip output end and master chip are turned on or off power supply circuit by PMOS tube, PMOS
The input terminal of pipe is connect with watchdog circuit, and the input terminal of watchdog circuit, which is transmitted with master chip by impulse wave, to be connected, PMOS
Pipe output end exports two-way voltage and current, and voltage and current is connect through power conversion chip with master chip all the way, PMOS tube output end
The another way voltage and current of output is to power amplifier.
Further, the pi type filter includes the common mode inductance being connect with power input, the both ends point of common mode inductance
It is not parallel with capacitance, is exported through rectifier diode after common mode inductance output end shunt capacitance.
Further, the effective impedance frequency range of the common mode inductance is 80~100MHz, and resistance value is 2K~4K Ω, described
The capacitance of the both ends parallel connection of common mode inductance is 4.7uF.
Further, the memory includes DDR memory and FLASH memory.
Purpose of utility model two：The utility model additionally provides a kind of with the anti-electromagnetic-radiation in the environment of bad electromagnetic field
The 2.4G wireless bridge devices of interference function, it is characterised in that：Include such as above-mentioned system, the system and device is after on circuit board
Be installed on together in all-plastic shell, the circuit board include the left and right sides be distributed side plate area and be located at Liang Ge side plates area
Intermediate core board area, master chip and DDR memory, FLASH memory are distributed at core board area, four at the core board area
Surrounding has metallic shield.
Using the above scheme, the 2.4G wireless bridge devices of the utility model can feel impedance from outer in actual operation
Watchdog microcontroller chip is added when extraneous rad equivalent is excessive or other reasons lead to system abnormity in the radiation interference on boundary
Power-off restoration circuit can be such that system restores in time.
The utility model is further described below in conjunction with the accompanying drawings.
Description of the drawings
Attached drawing 1 is the structure diagram of the utility model specific embodiment system；
Attached drawing 2 is the circuit structure diagram of the utility model specific embodiment pi type filter；
Attached drawing 3 is the entity structure schematic diagram that the utility model specific embodiment circuit board is specifically arranged；
Attached drawing 4 is the solid appearance three-view diagram of the utility model specific embodiment 2.4G wireless bridge devices, and a is main view
Figure, b are side view, and c is rearview.
Specific implementation mode
Specific embodiment of the utility model is 2.4G wireless bridge devices as shown in Figs 1-4 comprising all-plastic shell
With the circuit board being fitted into, circuit board is equipped with anti-electromagnetic-radiation interference system, electromagnetic radiation ring of the system in 30V/m
There is good anti-electromagnetic-radiation interference effect under border；The system includes power module, watchdog chip, master chip, master chip
Output end is separately connected memory and power amplifier (PA) and low noise (LNA), memory include DDR memory and
FLASH memory.Circuit board includes the side plate area and the core board area among Liang Ge side plates area that the left and right sides is distributed,
Master chip and DDR memory, FLASH memories are distributed at core board area, and surrounding is with metallic shield at the core board area
Cover, shields extra radiation.
Power module includes power input and DC-DC power source chip, in the present embodiment, power input POE supply voltages
It is 24V/0.5A, power input is connect by pi type filter with DC-DC power source chip, DC- DC power supply chip outputs point
Not Wei watchdog chip and master chip power supply, the DC-DC power supply chips concrete model used in the present embodiment for：AOZ1284
(12 turns of 5V)；The concrete model of watchdog chip is： STC15W204S-35I-SOP8；The concrete model of master chip is
AR9341；Power supply circuit between DC-DC power source chip output and master chip is turned on or off power supply circuit by PMOS tube,
The input terminal of PMOS tube is connect with watchdog circuit, and the input terminal of watchdog circuit, which is transmitted with master chip by impulse wave, to be connected,
PMOS tube output end exports two-way voltage and current, and through DC-DC power source conversion chip ST1S06PUR, (5V turns voltage and current all the way
It 3.3V) is connect with master chip, the another way voltage and current that PMOS tube output end exports to power amplifier.
Above-mentioned pi type filter includes the common mode inductance being connect with power input, and the both ends of common mode inductance are parallel with respectively
Capacitance is exported through rectifier diode D1 after common mode inductance output end shunt capacitance.The effective impedance frequency range of the common mode inductance is 80
~100MHz, resistance value are 2K~4K Ω, and the capacitance of the both ends parallel connection of common mode inductance is 4.7uF.
The input voltage of the utility model moderate resistance electromagnetic interference system is 24V/0.5A, by pi type filter to DC-
DC power supply chip power supply, DC-DC power source chip exports 5V@3A, and is supplied to the power amplifier (PA) of watchdog chip and radio frequency
Electricity, another way 5V@3A voltages export 3.3V@1.5A to master chip (AR9341), master by other DC-DC power source conversion chip
Chip connects DDR memory and FLASH memory；Master chip sends out impulse wave to watchdog chip by GPIO mouthfuls, if seen
Door dog chip does not receive impulse wave in 3min and just cuts off 5V power supplies by PMOS tube, to make system reboot reset.This reality
π filters are added in power input with novel, core is exactly anti-common mode and the differential mode effect of common mode inductance.Wherein common mode electricity
The type selecting of sense is particularly important, its selection directly influences the performance of entire resisting radiation interference, includes impedance, the volume of each frequency range
Constant current value, sensibility reciprocal etc., all to compare by radiated immunity test can just be verified.The utility model is in electric wave
In darkroom, works on power to 2.4G wireless bridge devices and connect notebook PIN packets with cable, in the electricity of maximum intensity 30V/m
It is tested under magnetic radiation environment, discovering device can often crash and restart in 80~100M frequency ranges.Therefore selected one of the present embodiment exists
The highest common mode inductance of impedance of 80~100M, in 2K~4K Ω or so, two capacitances that both ends are incorporated to are then for impedance
4.7uF, the pi type filter thus constituted are capable of the radiation interference of effective impedance 80~100MHz frequency ranges.
Using the all-plastic shell of low cost, radiation can penetrate outer the 2.4G wireless bridge devices of the utility model
Shell passes to master chip, so metallic shield is added in core board region, can effectively shield the entrance of free surrounding space radiation, and
It releases away by ground wire.
The utility model is not limited to above-mentioned specific implementation mode, and persons skilled in the art are according to the utility model public affairs
The content opened, may be used other a variety of specific implementation modes implement it is the utility model or it is every use the utility model
Design structure and thinking, do simple change or change, both fall within the scope of protection of the utility model.
Claims (6)
1. a kind of 2.4G wireless bridge devices are in bad electromagnetic field environment moderate resistance electromagnetic interference system, including power module,
Watchdog chip, master chip, master chip output end are separately connected memory and power amplifier, it is characterised in that：The power supply
Module includes power input and power supply chip, and power input is connect by pi type filter with power supply chip, and power supply chip is defeated
Outlet is respectively watchdog chip and master chip power supply, and the power supply circuit between the power supply chip output end and master chip passes through
PMOS tube is turned on or off power supply circuit, and the input terminal of PMOS tube is connect with watchdog circuit, the input terminal of watchdog circuit with
Master chip is transmitted by impulse wave and is connected, and PMOS tube output end exports two-way voltage and current, and voltage and current is converted through power supply all the way
Chip is connect with master chip, the another way voltage and current that PMOS tube output end exports to power amplifier.
2. 2.4G wireless bridge devices according to claim 1 are in bad electromagnetic field environment moderate resistance electromagnetic interference system
System, it is characterised in that：The pi type filter includes the common mode inductance being connect with power input, the both ends difference of common mode inductance
It is parallel with capacitance, is exported through rectifier diode after common mode inductance output end shunt capacitance.
3. 2.4G wireless bridge devices according to claim 2 are in bad electromagnetic field environment moderate resistance electromagnetic interference system
System, it is characterised in that：The effective impedance frequency range of the common mode inductance is 80~100MHz, and resistance value is 2K~4K Ω, the common mode
The capacitance of the both ends parallel connection of inductance is 4.7uF.
4. 2.4G wireless bridge devices according to claim 1 or 2 or 3 anti-electromagnetic-radiation in the environment of bad electromagnetic field is dry
Disturb system, it is characterised in that：The memory includes DDR memory and FLASH memory.
5. a kind of 2.4G wireless bridge devices having in bad electromagnetic field environment moderate resistance electromagnetic interference function, feature exist
In：Include the system as described in claim 1-3 any one, which is installed on all-plastic together after on circuit board
In shell, the circuit board includes the side plate area and the core board area among Liang Ge side plates area that the left and right sides is distributed, main
Chip and DDR memory, FLASH memory are distributed at core board area, and surrounding is with metallic shield at the core board area.
6. a kind of 2.4G wireless bridge devices having in bad electromagnetic field environment moderate resistance electromagnetic interference function, feature exist
In：Including system as claimed in claim 4, which is installed on after on circuit board in all-plastic shell together, institute
State circuit board include the left and right sides be distributed side plate area and the core board area among Liang Ge side plates area, master chip and
DDR memory, FLASH memory are distributed at core board area, and surrounding is with metallic shield at the core board area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820181627.5U CN207995119U (en) | 2018-02-02 | 2018-02-02 | 2.4G wireless bridge devices and its in bad electromagnetic field environment moderate resistance electromagnetic interference system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820181627.5U CN207995119U (en) | 2018-02-02 | 2018-02-02 | 2.4G wireless bridge devices and its in bad electromagnetic field environment moderate resistance electromagnetic interference system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207995119U true CN207995119U (en) | 2018-10-19 |
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ID=63823582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820181627.5U Active CN207995119U (en) | 2018-02-02 | 2018-02-02 | 2.4G wireless bridge devices and its in bad electromagnetic field environment moderate resistance electromagnetic interference system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207995119U (en) |
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2018
- 2018-02-02 CN CN201820181627.5U patent/CN207995119U/en active Active
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