CN107682045B - Carrier signal measuring device and measuring method - Google Patents
Carrier signal measuring device and measuring method Download PDFInfo
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- CN107682045B CN107682045B CN201711007223.0A CN201711007223A CN107682045B CN 107682045 B CN107682045 B CN 107682045B CN 201711007223 A CN201711007223 A CN 201711007223A CN 107682045 B CN107682045 B CN 107682045B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/46—Monitoring; Testing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
Abstract
The utility model relates to a carrier signal measuring device and a measuring method, wherein the carrier signal measuring device comprises a surge protector, a voltage limiter, a coupling transformer and a matching attenuator which are sequentially connected in parallel, and a safety capacitor is connected between the voltage limiter and the surge protector.
Description
Technical Field
The utility model relates to the field of carrier communication, in particular to a carrier signal measuring device and a carrier signal measuring method.
Background
The power line carrier communication is a communication mode for transmitting data and media signals by using a power line, the environment for communication by using the power line is mature gradually, and the power line carrier communication is adopted without rewiring, so that a large amount of material resources and manpower can be saved, and good economic and social benefits are achieved, but the problem of high attenuation, high noise, harmonic interference and the like exists in the process of transmitting the carrier signals by using the power line, so that the carrier signals need to be measured in the field. And performance testing of carrier equipment in a laboratory environment is also required.
At present, as shown in fig. 1, a laboratory measuring method of a carrier signal is shown, and the measuring method uses equipment including a filter 1', an isolation power supply 2', an artificial power supply network LISN3', a signal tapping device 4', an oscilloscope 5' and carrier equipment to be measured 6', wherein the filter 1', the isolation power supply 2', the artificial power supply network 3' are used for providing interference signals for filtering mains supply, a signal output port of the artificial power supply network 3' filters alternating voltage, the separated carrier signal is input into the oscilloscope 5' through the signal tapping device 4', and thus, although the carrier signal is measured through a low-voltage probe of the oscilloscope 5', the measuring device is complex in equipment, is only suitable for laboratory environments, cannot be applied to the actual field environment for testing the carrier signal, and is inconvenient to use.
For another example, chinese patent No. cn201513556318. X (grant notice No. CN 205070993U) discloses a power line carrier communication module testing device, where the testing device includes a high-frequency filter, an isolation transformer, a socket, a one-stage or multi-stage testing module, a modulation and testing device, a carrier receiver, an oscilloscope, and a spectrum analyzer connected by a power line; each group of test modules comprises a carrier communication module test interface, an attenuator and five groups of switches. Although the testing device realizes the testing of the carrier signal, the testing device has complex structure and inconvenient use.
Therefore, there is a need for further improvements in existing carrier signal measurement devices and methods.
Disclosure of Invention
The first technical problem to be solved by the utility model is to provide a carrier signal measuring device with simple structure and convenient measurement aiming at the current state of the art.
The second technical problem to be solved by the utility model is to provide a carrier signal measuring method with simple structure and convenient measurement aiming at the current state of the art.
The technical scheme adopted by the utility model for solving the first technical problem is as follows: a carrier signal measurement device, characterized in that: the device comprises a surge protector, a voltage limiter, a coupling transformer and a matching attenuator which are sequentially connected in parallel, wherein a safety capacitor is connected between the voltage limiter and the surge protector, the safety capacitor is connected to a zero line N of a power supply, two ends of the surge protector are respectively connected with a live wire L and the zero line N of the power supply, one end of the voltage limiter is respectively connected with one end of a primary winding of the coupling transformer and one end of the surge protector at the same time, the other end of the voltage limiter is respectively connected with the other end of the primary winding of the coupling transformer and one end of the safety capacitor at the same time, the input end of the matching attenuator is connected with a secondary winding of the coupling transformer, one end of an output end of the matching attenuator is connected with a measuring instrument, and the other end of the output end of the matching attenuator is grounded.
Preferably, the matching attenuator comprises a first resistor, a second resistor and a third resistor, wherein the first ends of the second resistor and the third resistor are connected with the first end of the secondary winding of the coupling transformer, the second end of the second resistor is connected to the first end of the first resistor and the measuring instrument, the second end of the third resistor is connected to the second end of the first resistor and grounded, and the second end of the third resistor is also connected with the second end of the secondary winding of the coupling transformer. Therefore, the matching attenuator can better buffer the change of impedance and attenuate the carrier signal passing through the coupling transformer, thereby facilitating the measuring instrument to receive and test the carrier signal.
Preferably, the voltage limiter is a voltage switching transient suppression diode TSS. Thus, surge power can be effectively absorbed, and elements in the circuit are protected from being damaged by surge pulses.
Preferably, the surge protector is a varistor. Thus, the reliability of the measuring device is improved, the lightning protection effect is improved, and the safety is improved.
Preferably, the matching attenuator is a matching attenuator with power attenuation of 20dB and impedance of 50Ω.
Preferably, the carrier signal measuring device is provided with a BNC connector, and is connected with the measuring instrument through the BNC connector. In this way, the connection of the measuring device to the measuring instrument is facilitated.
Preferably, the carrier signal measuring device is provided with a plug, and is connected with the live wire L and the zero wire N of the power supply through the plug. Thus, the connection of the measuring device with the live wire and the zero wire of the power supply is facilitated.
Further preferably, the plug is a two-plug or a three-plug.
There are various options for the meter, preferably the meter is an oscilloscope or a spectrum analyzer.
The utility model solves the second technical problem by adopting the technical proposal that: a measuring method using the carrier signal measuring device is provided. The method is characterized in that: the method comprises the following steps:
(1) The carrier equipment is connected with a live wire L and a zero wire N of a power supply, and can be powered through the power supply;
(2) One end of the measuring device is connected to the live wire L and the zero wire N of the power supply, the other end of the measuring device is connected to the measuring instrument, and communication signals of the carrier equipment are transmitted to the measuring instrument through the measuring device, so that the measuring of the carrier signals of the carrier equipment is realized through the measuring instrument.
Compared with the prior art, the utility model has the advantages that: the carrier signal measuring device comprises a surge protector, a voltage limiter, a coupling transformer and a matching attenuator which are sequentially connected in parallel, wherein a safety capacitor is connected between the voltage limiter and the surge protector.
Drawings
Fig. 1 is a schematic structural diagram of a carrier signal measuring device in the prior art;
fig. 2 is a schematic circuit diagram of a carrier signal measuring device according to an embodiment of the present utility model;
fig. 3 is a schematic structural diagram of an embodiment of the present utility model.
Detailed Description
The utility model is described in further detail below with reference to the embodiments of the drawings.
As shown in fig. 2 and fig. 3, the carrier signal measuring device in the embodiment of the utility model comprises a surge protector 1, a voltage limiter 2, a coupling transformer 3 and a matching attenuator 4 which are sequentially connected in parallel, wherein a safety capacitor 5 is connected between the voltage limiter 2 and the surge protector 1, the safety capacitor 5 is connected to a zero line N of a power supply, two ends of the surge protector 1 are respectively connected with a live wire L and the zero line N of the power supply, one end of the voltage limiter 2 is respectively connected with one end of a primary winding of the coupling transformer 3 and one end of the surge protector 1 at the same time, the other end of the voltage limiter 2 is respectively connected with the other end of the primary winding of the coupling transformer 3 and one end of the safety capacitor 5 at the same time, the input end of the matching attenuator 4 is connected with a secondary winding of the coupling transformer 3, one end of an output end of the matching attenuator 4 is connected with a measuring instrument 6, and the other end of the output end is grounded. The measuring instrument may take various forms, for example, the measuring instrument 6 is an oscilloscope or a spectrum analyzer, and in this embodiment, the measuring instrument 6 is an oscilloscope.
In this embodiment, the matching attenuator 4 includes a first resistor R1, a second resistor R2, and a third resistor R3, where the first ends of the second resistor R2 and the third resistor R3 are connected to the first end of the secondary winding of the coupling transformer 3, the second end of the second resistor R2 is connected to the first end of the first resistor R1 and to the measuring instrument 6, the second end of the third resistor R3 is connected to the second end of the first resistor R1 and to the ground, and the second end of the third resistor R3 is also connected to the second end of the secondary winding of the coupling transformer 3.
In the embodiment, the voltage limiter 2 is a voltage switching transient suppression diode TSS, so that surge power can be effectively absorbed by the voltage limiter 2, and elements in a circuit are protected from being damaged by surge pulses; the surge protector 1 is a piezoresistor RV, and can effectively improve the lightning protection effect, increase the safety and improve the reliability of the measuring device simultaneously when the signal transmitted from the power supply passes through the surge protector.
In order to facilitate the transmission of the carrier signal, in this embodiment, the matching attenuator 4 is a matching attenuator with a power attenuation of 20dB and an impedance of 50Ω. Therefore, the matching attenuator can better buffer the change of impedance and attenuate the carrier signal of the coupled transformer, thereby facilitating the receiving and testing of the carrier signal by the measuring instrument.
In order to facilitate the connection between the carrier signal measuring device and the measuring instrument, in this embodiment, the carrier signal measuring device is provided with a BNC connector 7, and is connected with the measuring instrument 6 through the BNC connector 7; in addition, be provided with plug 8 on the carrier signal measuring device to be connected with live wire L and the zero line N of power through this plug 8, make things convenient for carrier signal measuring device and power live wire and the connection of zero line more like this. The plug 8 may be a two-plug or a three-plug.
As shown in fig. 3, the measurement method using the carrier signal measurement device includes the following steps:
(1) The carrier device 9 is connected with a live wire L and a zero wire N of the power supply, and can take electricity through the power supply;
(2) One end of the measuring device is connected to the live wire L and the zero wire N of the power supply through the plug 8, the other end of the measuring device is connected to the measuring instrument 6, and communication signals of the carrier device 9 are transmitted to the measuring instrument 6 through the measuring device, so that the measuring of the carrier signals of the carrier device 9 is realized through the measuring instrument 6. Specifically, the carrier signal of the carrier device is transmitted to an oscilloscope through a surge protector 1, a safety capacitor 5, a voltage limiter 2, a coupling transformer 3 and a matching attenuator 4 of the measuring device, so that the carrier signal of the carrier device is measured.
The power supply in the device can be a mains supply or a pure power supply with noise on a power line filtered, the use environment is different, the power supply needs to be processed, and if the device is used for field measurement, the power supply is a mains supply; if the device is used for the performance test of the carrier equipment in the laboratory, the power supply is a pure power supply which filters noise on a power line after passing through a filter and isolating the power supply.
The carrier signal measuring device has the advantages of simple structural design, low cost, simple measuring method for measuring the carrier signal by adopting the carrier signal measuring device, better measuring of the carrier signal of the carrier equipment in the actual working environment, good lightning protection effect and convenience for testing the carrier equipment.
The foregoing is merely illustrative of the preferred embodiments of this utility model, and it will be appreciated by those skilled in the art that variations and modifications of this utility model can be made without departing from the principles of the utility model, and these are considered to be within the scope of the utility model.
Claims (9)
1. A carrier signal measurement device, characterized in that: the device comprises a surge protector (1), a voltage limiter (2), a coupling transformer (3) and a matching attenuator (4) which are sequentially connected in parallel, wherein a safety capacitor (5) is connected between the voltage limiter (2) and the surge protector (1), the safety capacitor (5) is connected to a zero line N of a power supply, two ends of the surge protector (1) are respectively connected with a live wire L and a zero line N of the power supply, one end of the voltage limiter (2) is respectively connected with one end of a primary winding of the coupling transformer (3) and one end of the surge protector (1) at the same time, the other end of the voltage limiter (2) is respectively connected with the other end of the primary winding of the coupling transformer (3) and one end of the safety capacitor (5) at the same time, one end of an output end of the matching attenuator (4) is connected with a secondary winding of the coupling transformer (3), the other end of the output end of the matching attenuator (4) is grounded, the matching attenuator (4) comprises a first resistor R1, a second resistor R2 and a third resistor R3 and a second end of the matching attenuator (3) are respectively connected to the first resistor R1 and the second resistor R3 and the second end of the second resistor R3 and the second resistor R3 are connected to the first end of the second resistor R1 and the third resistor R2 and the second end R3 and the third resistor 1 is connected to the second end of the third resistor 1 and the third resistor R2 and the third end R2 and the third resistor 3 is connected to the third end resistor, and the second end of the third resistor R3 is also connected with the second end of the secondary winding of the coupling transformer (3).
2. The carrier signal measurement device according to claim 1, wherein: the voltage limiter (2) is a voltage switching transient suppression diode (TSS).
3. The carrier signal measurement device according to claim 1, wherein: the surge protector (1) is a piezoresistor RV.
4. The carrier signal measurement device according to claim 1, wherein: the matching attenuator (4) is a matching attenuator with 20dB of power attenuation and 50 omega of impedance.
5. The carrier signal measurement device according to claim 1, wherein: the carrier signal measuring device is provided with a BNC connector (7) and is connected with the measuring instrument (6) through the BNC connector (7).
6. The carrier signal measurement device according to claim 1, wherein: the carrier signal measuring device is provided with a plug (8) and is connected with a live wire L and a zero wire N of a power supply through the plug (8).
7. The carrier signal measurement device of claim 6, wherein: the plug (8) is a two-plug or a three-plug.
8. The carrier signal measurement device according to any one of claims 1 to 7, characterized in that: the measuring instrument (6) is an oscilloscope or a spectrum analyzer.
9. A measurement method using the carrier signal measurement device according to any one of claims 1 to 8, characterized in that: the method comprises the following steps:
(1) The carrier equipment (9) is connected with a live wire L and a zero wire N of a power supply, and can be powered through the power supply;
(2) One end of the measuring device is connected to a live wire L and a zero wire N of a power supply, the other end of the measuring device is connected to the measuring instrument (6), and communication signals of the carrier equipment (9) are transmitted to the measuring instrument (6) through the measuring device, so that the measuring of the carrier signals of the carrier equipment (9) is realized through the measuring instrument (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711007223.0A CN107682045B (en) | 2017-10-25 | 2017-10-25 | Carrier signal measuring device and measuring method |
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| CN201711007223.0A CN107682045B (en) | 2017-10-25 | 2017-10-25 | Carrier signal measuring device and measuring method |
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| CN107682045B true CN107682045B (en) | 2023-05-23 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001075775A2 (en) * | 2000-04-04 | 2001-10-11 | Contact Technology Systems, Inc. | Arc fault current interrupter testing device |
| CN102215035A (en) * | 2011-05-12 | 2011-10-12 | 青岛鼎信通讯有限公司 | Alternating current mains supply isolation zero crossing checking circuit combined with low-voltage power line carrier wave communication signal coupling |
| CN203193632U (en) * | 2013-04-23 | 2013-09-11 | 国家电网公司 | On-site low-voltage power line signal sampling and isolating apparatus |
| CN103944607A (en) * | 2014-04-14 | 2014-07-23 | 江苏益邦电力科技有限公司 | Low voltage power line carrier communication signal detection device |
| CN104836595A (en) * | 2015-05-26 | 2015-08-12 | 贵州电力试验研究院 | Power line carrier wave communication test program control attenuator and control method thereof |
| CN207460168U (en) * | 2017-10-25 | 2018-06-05 | 宁波三星医疗电气股份有限公司 | A kind of carrier signal measuring device |
-
2017
- 2017-10-25 CN CN201711007223.0A patent/CN107682045B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001075775A2 (en) * | 2000-04-04 | 2001-10-11 | Contact Technology Systems, Inc. | Arc fault current interrupter testing device |
| CN102215035A (en) * | 2011-05-12 | 2011-10-12 | 青岛鼎信通讯有限公司 | Alternating current mains supply isolation zero crossing checking circuit combined with low-voltage power line carrier wave communication signal coupling |
| CN203193632U (en) * | 2013-04-23 | 2013-09-11 | 国家电网公司 | On-site low-voltage power line signal sampling and isolating apparatus |
| CN103944607A (en) * | 2014-04-14 | 2014-07-23 | 江苏益邦电力科技有限公司 | Low voltage power line carrier communication signal detection device |
| CN104836595A (en) * | 2015-05-26 | 2015-08-12 | 贵州电力试验研究院 | Power line carrier wave communication test program control attenuator and control method thereof |
| CN207460168U (en) * | 2017-10-25 | 2018-06-05 | 宁波三星医疗电气股份有限公司 | A kind of carrier signal measuring device |
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| CN107682045A (en) | 2018-02-09 |
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