CN202351337U - Parallel connection test system for multiple carrier sheets - Google Patents
Parallel connection test system for multiple carrier sheets Download PDFInfo
- Publication number
- CN202351337U CN202351337U CN201120416205XU CN201120416205U CN202351337U CN 202351337 U CN202351337 U CN 202351337U CN 201120416205X U CN201120416205X U CN 201120416205XU CN 201120416205 U CN201120416205 U CN 201120416205U CN 202351337 U CN202351337 U CN 202351337U
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- China
- Prior art keywords
- carrier wave
- tested
- wave meter
- telefault
- power supply
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- 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.)
- Expired - Lifetime
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Abstract
The utility model discloses a parallel connection test system for multiple carrier sheets. The system comprises a test power supply for providing an alternating current power supply and a plurality of tested carrier sheets, wherein the tested carrier sheets are connected in parallel with one another and then are connected to the test power supply. The system is characterized by also comprising a plurality of inductance coils, wherein each inductance coil is connected in series between each tested carrier sheet and the test power supply respectively; the power frequency impedance of the inductance coils is less than that of the tested carrier sheets; and the high frequency impedance of the inductance coils is higher than that of the tested carrier sheets. By the system, the carrier sheets can be accurately tested when connected in parallel with one anther.
Description
Technical field
The utility model relates to the device of testing carrier wave meter, is specifically related to be used for the test macro of a plurality of carrier wave parallel connection tests.
Background technology
Low-voltage powerline carrier communication is to utilize a kind of communication mode of low-voltage power line as transport vehicle, when the low pressure carrier wave table is tested, often requires a plurality of carrier wave meters back that is together in parallel to insert testing power supply and test, to reduce the test duration.Testing power supply is exactly the AC power of test usefulness, in carrier test, plays carrier and power supply function; Carrier wave meter is exactly the electric energy meter that utilizes line of electric force to carry out carrier communication, is responsible for collecting electric weight, and uploads energy data.Because every carrier wave meter all has characteristic impedance, cause characteristic impedance step-down after a plurality of carrier wave meter parallel connections, cause test data inaccurate, when carrier wave meter is more even because parallel impedance is too low, can't test.
The utility model content
The utility model technical matters to be solved just provides a kind of test macro that is used for a plurality of carrier wave meter parallel connection tests, and the input impedance that can improve each tested carrier wave meter realizes the accurate test when a plurality of carrier wave meters are parallelly connected.
For solving the problems of the technologies described above; The technical scheme that the utility model is taked is following: a kind of test macro that is used for a plurality of carrier wave meter parallel connection tests; Comprise the testing power supply that is used to provide AC power, a plurality of tested carrier wave meter; Said tested carrier wave meter is mutual and connect back access testing power supply, and it is characterized in that: also comprise a plurality of telefaults, each telefault is serially connected in respectively between each tested carrier wave meter and the testing power supply; The power frequency impedance of said telefault is less than the power frequency impedance of tested carrier wave meter, and the high-frequency resistance of said telefault is greater than the high-frequency resistance of tested carrier wave meter.
Thus, the telefault of access plays the effect of impedance conversion, to improve the input impedance of each tested carrier wave meter, can satisfy the characteristic impedance requirement of a plurality of carrier wave meter parallel connection tests, obtains test data accurately when realizing the parallelly connected test of a plurality of carrier wave meters.
The said telefault of the utility model is the MnZn compressed-iron-core coil.
The number of turn of the said telefault of the utility model is 3～5 circles.
Compared with prior art, the utlity model has following advantage:
1, its power frequency impedance of telefault that inserts is less than the power frequency impedance of tested carrier wave meter; The high-frequency resistance of telefault is greater than the high-frequency resistance of tested carrier wave meter; Thereby played the effect of impedance conversion, obtained test data accurately when having realized the parallelly connected test of a plurality of carrier wave meters.
2, tested carrier wave meter is carried out the parallel connection test,, improved test speed to reduce the test duration.
Description of drawings
Fig. 1 is that the system of the utility model specific embodiment connects synoptic diagram.
Among the figure: 1, telefault; 2, magnet ring.
Embodiment
A kind of test macro that is used for a plurality of carrier wave meter parallel connection tests as shown in Figure 1; It comprises the testing power supply that is used to provide AC power, a plurality of tested carrier wave meter and a plurality of telefault 1; Tested carrier wave meter is mutual and connect back access testing power supply, and each telefault is serially connected in respectively between each tested carrier wave meter and the testing power supply; The power frequency impedance of telefault is less than the power frequency impedance of tested carrier wave meter, and the high-frequency resistance of telefault is greater than the high-frequency resistance of tested carrier wave meter.The telefault of this access plays the effect of impedance conversion, to improve the input impedance of each tested carrier wave meter, can satisfy the characteristic impedance requirement of a plurality of carrier wave meter parallel connection tests, obtains test data accurately when realizing the parallelly connected test of a plurality of carrier wave meters.
Particularly, telefault is serially connected between the input end L of output terminal Ua and tested carrier wave meter of testing power supply, and the output terminal Un of testing power supply links to each other with the input end N of tested carrier wave meter.Wherein, Telefault is the MnZn compressed-iron-core coil, and the magnetic core of telefault is a magnet ring 2, and magnet ring is a MnZn iron powder material; Telefault is that the coil with lead coiling 3～5 circles or other number of turn on this magnet ring constitutes, so that telefault is the power frequency impedance and the carrier wave impedance of needs.The quantity of the tested carrier wave meter of parallel connection can be N, N=2～+ ∞;
The power frequency impedance of tested carrier wave meter is greater than the power frequency impedance of telefault, so it is almost constant to insert power frequency impedance total behind the telefault, thereby do not influence the supplied character of tested carrier wave meter.The high-frequency resistance of tested carrier wave meter is smaller than the high-frequency resistance of telefault; So improved the input impedance of tested carrier wave meter behind the access telefault; Thereby a plurality of tested carrier wave meters can be tested in parallel connection; The telefault that inserts has improved the high-frequency resistance of tested carrier wave meter in testing power supply, so carrier test is also unaffected.
The embodiment of the utility model is not limited thereto; Under the above-mentioned basic fundamental thought of the utility model prerequisite; According to modification, replacement or the change of the ordinary skill knowledge of this area and customary means, all within the utility model rights protection scope to the utility model other various ways that content is made.
Claims (3)
1. one kind is used for the test macro that a plurality of carrier wave meter parallel connections are tested; Comprise the testing power supply that is used to provide AC power, a plurality of tested carrier wave meter; Said tested carrier wave meter mutually and connect the back and insert testing power supply; It is characterized in that: also comprise a plurality of telefaults, each telefault is serially connected in respectively between each tested carrier wave meter and the testing power supply; The power frequency impedance of said telefault is less than the power frequency impedance of tested carrier wave meter, and the high-frequency resistance of said telefault is greater than the high-frequency resistance of tested carrier wave meter.
2. the test macro that is used for a plurality of carrier wave meter parallel connection tests according to claim 1, it is characterized in that: said telefault is the MnZn compressed-iron-core coil.
3. the test macro that is used for a plurality of carrier wave meter parallel connection tests according to claim 1 and 2, it is characterized in that: the number of turn of said telefault is 3～5 circles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120416205XU CN202351337U (en) | 2011-10-27 | 2011-10-27 | Parallel connection test system for multiple carrier sheets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120416205XU CN202351337U (en) | 2011-10-27 | 2011-10-27 | Parallel connection test system for multiple carrier sheets |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202351337U true CN202351337U (en) | 2012-07-25 |
Family
ID=46540333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120416205XU Expired - Lifetime CN202351337U (en) | 2011-10-27 | 2011-10-27 | Parallel connection test system for multiple carrier sheets |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202351337U (en) |
-
2011
- 2011-10-27 CN CN201120416205XU patent/CN202351337U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120725 |
|
| CX01 | Expiry of patent term |