CN208140913U - A kind of EMC test communication line filter - Google Patents
A kind of EMC test communication line filter Download PDFInfo
- Publication number
- CN208140913U CN208140913U CN201820612835.6U CN201820612835U CN208140913U CN 208140913 U CN208140913 U CN 208140913U CN 201820612835 U CN201820612835 U CN 201820612835U CN 208140913 U CN208140913 U CN 208140913U
- Authority
- CN
- China
- Prior art keywords
- interface chip
- interface
- emc test
- chip
- communication line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model relates to signal isolating device fields, disclose a kind of EMC test communication line filter, including power module, first interface chip, second interface chip, third interface chip, communication isolation circuit and filter circuit, communication isolation circuit one end connects first interface chip, communication isolation circuit other end connection second interface chip and third interface chip, second interface chip and third interface chip are used to carry out transmission signal with EMC test equipment and calibrator for watt-hour meter.The utility model connects computer by device one end; the other end connects EMC test equipment and calibrator for watt-hour meter; the input of 2 road RS232 signals can be achieved and export good electrical isolation; to in the conduction interference immunity experiment and attenuation oscillasion impulse immunity experiment of electrical fast transient (eft) immunity experiment, radiofrequency field induction; RS232 interface equipment can be effectively protected, it is ensured that RS232 serial communication is normally carried out.
Description
Technical field
The utility model relates to signal isolating device fields, more particularly to a kind of EMC test is filtered with communication line
Wave device.
Background technique
In July, 2009, national grid have formulated the development plan of smart grid：- 2010 years 2009 are planning pilot rank
Section；- 2015 years 2011 are the all-round construction stage；- the year two thousand twenty in 2016 is to lead the improvement stage, will build up unified heavily fortified point comprehensively
Strong smart grid.Electric energy meter is the intelligent terminal of smart grid, is the basis of smart grid construction, in addition to basic voltameter
Function is measured, is transmitted there are also more rate meterings, user's control, data and the intelligent functions such as anti-electricity-theft, the function of constantly extending
Also the detectability of testing agency is put forward new requirements and is challenged.
At present in electric energy meter EMC test, realize that automatic detection has become trend using computer technology.But
Electrical fast transient (eft) immunity experiment, the conduction interference immunity experiment of radiofrequency field induction and the examination of attenuation oscillasion impulse immunity to interference
In testing, there is interference on the communication line between EMC test equipment and calibrator for watt-hour meter and computer, often lead
It causes computer corruption, lose the failures such as data.Now substantially using the processing of the passive devices such as photoelectrical coupler and inductance, filtering
Effect is general, and is not sufficiently stable.Therefore how to ensure EMC test equipment and calibrator for watt-hour meter and computer it
Between communication line work normally, have become the hot spot of research.
Utility model content
The utility model is poor for filter effect in the prior art, using unstable disadvantage, and it is simultaneous to provide a kind of electromagnetism
Hold test communication line filter.
In order to solve the above-mentioned technical problem, the utility model is addressed by following technical proposals.
A kind of EMC test communication line filter, including power module, first interface chip, second interface core
Piece, third interface chip, communication isolation circuit and filter circuit, power module connect first interface chip, second interface chip
With third interface chip, filter circuit connecting communication isolation circuit, communication isolation circuit one end connect first interface chip, first
Interface chip connects second interface chip and third interface chip for handling computer instruction, the communication isolation circuit other end,
Second interface chip and third interface chip are used to carry out transmission letter with EMC test equipment and calibrator for watt-hour meter
Number.
Preferably, power module is AC/DC Switching Power Supply, voltage range is 85V~460VAC.
Preferably, first interface chip, second interface chip and third interface chip are SP3232 chip, first is connect
Mouth chip is equipped with 2 RS232 interfaces, for connecting computer；Second interface chip and third interface are equipped with 1 RS232 and connect
Mouthful, for connecting EMC test equipment and calibrator for watt-hour meter.
Preferably, further including a power supply indicator and two signal lamps, power supply indicator connection power module is simultaneously shown
Show power supply energization situation, signal lamp transmits situation for display interface signals.
The utility model has significant technical effect due to using above technical scheme：The utility model is by having
Power filter improves anti-interference ability when EMC test, it can be ensured that EMC test equipment and electric energy meter
Communication line between verifying attachment and computer works normally, and ensure that the repeatability and stability of test result, improves
Working efficiency is advantageously implemented comprehensive quality management.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of EMC test communication line filter of the utility model.
Specific embodiment
The utility model is described in further detail with embodiment with reference to the accompanying drawing.
As shown in Figure 1, a kind of EMC test communication line filter, including power module, first interface chip,
Second interface chip, third interface chip, communication isolation circuit and filter circuit, power module connect first interface chip, the
Two interface chips and third interface chip, filter circuit connecting communication isolation circuit, communication isolation circuit one end connection first connect
Mouthful chip, for first interface chip for handling computer instruction, the communication isolation circuit other end connects second interface chip and the
Three interface chips, second interface chip and third interface chip are used to and EMC test equipment and calibrator for watt-hour meter
Carry out transmission signal.
Power module is AC/DC Switching Power Supply, and the input mode of power module is Width funtion input mode, and voltage range is
85V~460VAC, using PMT18L as AC/DC power supply, which has a wide range input voltage of 85V~460VAC, and three
Isolation reaches 4kVAC between the output voltage of road, and three tunnels output nominal voltage, electric current are respectively 12V300mA, 15V500mA,
8V100mA fully meets product design demand.
First interface chip, second interface chip and third interface chip are SP3232 chip, and first interface chip is set
There are 2 RS232 interfaces, for connecting computer；Second interface chip and third interface are equipped with 1 RS232 interface, for connecting
EMC test equipment and calibrator for watt-hour meter are connect, which meets 3.0V-5.5V operating voltage, and meets enhanced
ESD specification.
It further include a power supply indicator and two signal lamps, power supply indicator connection power module simultaneously shows that power supply is powered
Situation, signal lamp transmit situation for display interface signals.
The invention uses the Switching Power Supply that independently exports of 3 tunnel of band, develops with communication isolation circuit and filter circuit
EMC test communication line filter, it can be ensured that EMC test equipment and calibrator for watt-hour meter and computer
Between communication line work normally, realize automatic detection, be advantageously implemented comprehensive quality management.
Computer is connected by device one end, the other end connects EMC test equipment and calibrator for watt-hour meter, can
Realize the input of 2 road RS232 signals and export good electrical isolation, thus electrical fast transient (eft) immunity experiment,
When the conduction interference immunity experiment and attenuation oscillasion impulse immunity experiment of radiofrequency field induction, RS232 can be effectively protected and connect
Jaws equipment, it is ensured that RS232 serial communication is normally carried out.
The utility model improves anti-interference ability when EMC test by active filter circuit, it can be ensured that
Communication line between EMC test equipment and calibrator for watt-hour meter and computer works normally, and ensure that test result
Repeatability and stability, improve work efficiency, be advantageously implemented comprehensive quality management.
In short, the above is only the preferred embodiment of the present invention, it is all according to present utility model application the scope of the patents institute
The equivalent changes and modifications of work should all belong to the covering scope of the utility model patent.
Claims (4)
1. a kind of EMC test communication line filter, it is characterised in that：Including power module, first interface chip,
Second interface chip, third interface chip, communication isolation circuit and filter circuit, power module connect first interface chip, the
Two interface chips and third interface chip, filter circuit connecting communication isolation circuit, communication isolation circuit one end connection first connect
Mouthful chip, for first interface chip for handling computer instruction, the communication isolation circuit other end connects second interface chip and the
Three interface chips, second interface chip and third interface chip are used to and EMC test equipment and calibrator for watt-hour meter
Carry out transmission signal.
2. a kind of EMC test communication line filter according to claim 1, it is characterised in that：Power module
For AC/DC Switching Power Supply, voltage range is 85V~460VAC.
3. a kind of EMC test communication line filter according to claim 1, it is characterised in that：First interface
Chip, second interface chip and third interface chip are SP3232 chip, and first interface chip is equipped with 2 RS232 interfaces, are used
In connection computer；Second interface chip and third interface are equipped with 1 RS232 interface, set for connecting EMC test
Standby and calibrator for watt-hour meter.
4. a kind of EMC test communication line filter according to claim 1, it is characterised in that：It further include one
A power supply indicator and two signal lamps, power supply indicator connection power module simultaneously show power supply energization situation, and signal lamp is used for
Display interface signals transmit situation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820612835.6U CN208140913U (en) | 2018-04-26 | 2018-04-26 | A kind of EMC test communication line filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820612835.6U CN208140913U (en) | 2018-04-26 | 2018-04-26 | A kind of EMC test communication line filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208140913U true CN208140913U (en) | 2018-11-23 |
Family
ID=64310483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820612835.6U Active CN208140913U (en) | 2018-04-26 | 2018-04-26 | A kind of EMC test communication line filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208140913U (en) |
-
2018
- 2018-04-26 CN CN201820612835.6U patent/CN208140913U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2938120Y (en) | Integral power measuring control device | |
| CN201097378Y (en) | Carrier power energy collection terminal | |
| CN104316201A (en) | Infrared array temperature measurement monitoring system of high-voltage isolating switch contact | |
| CN105356910A (en) | Test system for low-voltage power line carrier module | |
| CN203502479U (en) | Shielding layer carrier communication-based power cable ground wire current on-line monitoring system | |
| CN208140913U (en) | A kind of EMC test communication line filter | |
| CN202495935U (en) | Electric power line carrier communication device based on RS485 electric energy meter | |
| CN204142835U (en) | A kind of single-phase electric energy meter | |
| CN107069649A (en) | A kind of electrical load safety operation control system | |
| CN204538706U (en) | Low-voltage intelligent synchro switch | |
| CN208027556U (en) | A kind of power wire broadband carrier kilowatt meter reading-out system | |
| CN204066370U (en) | A kind of wireless data acquisition system being applicable to thermal test | |
| CN206757335U (en) | A kind of scan module | |
| CN112213555A (en) | Electric energy meter solution method based on high-speed magnetic isolation communication | |
| CN104836239A (en) | Low-voltage intelligent synchronous switch | |
| CN107888471A (en) | A kind of electrical isolation formula USB RS485 converters | |
| CN205247135U (en) | Integrated observing and controlling system of multiple signal intelligence | |
| CN105739362A (en) | Transformer station measurement and control protection device | |
| CN204495472U (en) | High voltage isolation switch contact infrared array temperature detection monitoring system | |
| CN205720377U (en) | Bus power supply type multifunctional electric meter | |
| CN206788242U (en) | A kind of communicator in single-phase broadband power line carrier kilowatt meter reading-out system | |
| CN203190565U (en) | Air conditioner control module | |
| CN207529181U (en) | A kind of RS485 telecommunication circuits | |
| CN205982422U (en) | Infrared communication electric energy meter | |
| CN210042231U (en) | Connection adapter for testing electrical performance indexes of locomotive integrated wireless communication equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |