CN212543777U - Non-invasive power line communication noise signal acquisition instrument - Google Patents
Non-invasive power line communication noise signal acquisition instrument Download PDFInfo
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- CN212543777U CN212543777U CN202021661583.XU CN202021661583U CN212543777U CN 212543777 U CN212543777 U CN 212543777U CN 202021661583 U CN202021661583 U CN 202021661583U CN 212543777 U CN212543777 U CN 212543777U
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Abstract
The utility model relates to a non-invasive power line communication noise signal acquires appearance. The instrument comprises an instrument shell and a circuit board arranged in the instrument shell, wherein the circuit board is provided with a power circuit unit, a coupling circuit unit, an A/D conversion circuit unit and a core processing chip unit which are connected in sequence; the instrument shell is provided with a plug which can be inserted into a socket arranged on a power line circuit to be connected with a power line, and the plug is connected with the power circuit unit. Through the circuit device set with required measurement and collection in an instrument shell, portable to realize plug-and-play through the plug that sets up, pull out after finishing using this acquire the appearance can, convenient to use is swift. The utility model discloses can not destroy the integrality of circuit, acquire the noise signal of power line fast.
Description
Technical Field
The utility model relates to a non-invasive power line communication noise signal acquires appearance.
Background
Power line communication refers to a communication method for transmitting communication data and media signals using a power line. The modulation frequency signal carrying the information to be transmitted is loaded on a power line for transmitting current for transmission, corresponding modulation and demodulation carrier chips are configured at two ends of a transmission line, and the information is transmitted through communication coding and decoding. The communication mode can avoid repeated laying of communication lines and can quickly and conveniently carry out broadband informatization reconstruction on the building.
However, the technology has inherent disadvantages that the laying environment cannot be completely protected like a common communication line because the technology is not a signal transmission line, the working environment is severe, and the communication signal attenuation is strong; high-frequency impact interference is large due to operations such as switching of electric equipment, and the signal-to-noise ratio is low; even if the communication fails completely.
There is therefore a need to extract power line communication noise to facilitate later testing, analysis and testing. The extraction of power line communication noise can be realized by a low-voltage power line high-frequency noise sampling and playback system disclosed by the Chinese utility model patent specification CN 202231717U and a power line noise acquisition circuit disclosed by CN 210720587U. They require pre-wiring installation in use, requiring the use of a large amount of hardware equipment.
Disclosure of Invention
The utility model aims to provide a non-invasive power line communication noise signal acquisition instrument, which comprises an instrument shell and a circuit board arranged in the instrument shell, wherein the circuit board is provided with a power circuit unit, a coupling circuit unit, an A/D conversion circuit unit and a core processing chip unit which are connected in sequence; the instrument shell is provided with a plug which can be inserted into a socket arranged on a power line circuit to be connected with a power line, and the plug is connected with the power circuit unit.
The utility model discloses can not destroy the integrality of circuit, acquire the noise signal of power line fast. Through the circuit device set with required measurement and collection in an instrument shell, portable to realize plug-and-play through the plug that sets up, pull out after finishing using this acquire the appearance can, convenient to use is swift.
Drawings
Fig. 1 and 2 show a perspective view of the present invention from two different angles, respectively;
fig. 3 shows a circuit structure diagram of the present invention.
Reference numerals:
10 an instrument housing;
20, a plug;
30 output/write changeover switch;
40USB port;
50 output indicator lights;
a write indicator lamp 60.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to fig. 3, the non-invasive noise signal acquiring instrument for power line communication includes an instrument housing 10 and a circuit board disposed in the instrument housing, wherein the circuit board is provided with a power circuit unit, a coupling circuit unit, an a/D conversion circuit unit (i.e. a circuit unit for converting an analog signal into a digital signal) and a core processing chip unit, which are connected in sequence;
the instrument housing is provided with a plug 20 which is insertable into a socket (not shown) provided on a power line to connect to the power line, and the plug 20 is connected to the power circuit unit.
The circuit board is also provided with a USB control chip unit which is connected with the core processing chip unit;
the instrument shell is also provided with an output/write-in changeover switch 30 and a USB port 40 for connecting with external equipment to exchange data, and the USB port 40 and the output/write-in changeover switch 30 are respectively connected with a USB control chip unit;
the output/write changeover switch switches between an output-on state in which a core processing chip unit outputs data to an external device connected to the USB port 40 and a write-on state in which an external device connected to the USB port 40 writes data to the core processing chip unit. The technical scheme can realize the data output and write-in functions. The switching operation can be facilitated by providing an output/write changeover switch. The output/write changeover switch 30 in the present embodiment is a push switch, a rocker switch, or the like.
The instrument shell is also provided with an output indicator lamp 50 and a write indicator lamp 60, and the output indicator lamp 50 and the write indicator lamp 60 are respectively connected with the USB control chip unit;
the output indicator lamp 50 is turned on when the output/write changeover switch is in the output on state, and the output indicator lamp 50 is turned off when the output/write changeover switch is in the write on state;
the write indicator lamp 60 is turned on when the output/write changeover switch is in the write-on state, and the write indicator lamp 60 is turned off when the output/write changeover switch is in the output-on state.
And a secondary filtering and amplifying circuit is connected between the USB control chip unit and the core processing chip unit, and the data of the core processing chip unit is output to external equipment after secondary filtering and amplification.
This technical scheme can play indicative effect, convenient to use through the output pilot lamp that sets up and write in the pilot lamp.
The utility model discloses a non-invasive method acquires power line communication noise data in real time, and hardware system (for example the socket of setting on the power line circuit) through direct plug-in waiting to measure the circuit can use.
The beneficial effects of the utility model are that can not destroy the integrality of circuit, acquire the noise signal of circuit fast. And outputting compressed waveform data through a USB port, storing the waveform data in upper computer software, performing effect evaluation according to a compression evaluation index, and storing a waveform information system through the evaluated software.
The utility model discloses a USB port links to each other with external equipment (for example host computer), the utility model discloses noise characteristic signal output to external equipment after can gathering and compressing. The characteristic signal is compressed, the characteristic of the signal can be represented by a small data size, so that a characteristic signal library of the noise waveform can be constructed, and data support can be provided for noise signal reconstruction and analysis. In addition, the external device can be used for writing related feature extraction algorithm data into the core processing chip unit so as to update the feature extraction algorithm.
The utility model discloses can directly acquire the waveform data on the power line, waveform data draws noise information through the waveform processing algorithm on the core processing chip unit, exports for outside host computer analysis through the USB port. Or finally displayed on an upper computer or other data display systems, and also can be stored as information of a database for analysis.
The specific working process of the utility model can be seen as follows:
and adjusting the output/write changeover switch to a write-in on state, wherein the write-in indicator lamp is lightened, and the output indicator lamp is extinguished. And writing data, such as a signal processing algorithm, into the core processing chip unit through an external device connected with the USB port, so as to update the algorithm inside the core processing chip unit.
The output/write changeover switch is adjusted to an output on state, at the moment, the output indicator lamp is lightened, and the write indicator lamp is extinguished. And writing data, such as a signal processing algorithm, into the core processing chip unit through an external device connected with the USB port, so as to update the algorithm inside the core processing chip unit.
The plug is inserted into a socket of the power line circuit to be tested, data in the power line circuit is read, the inserted data is input from the power circuit unit, noise information is extracted, filtered and compressed through the core processing chip unit, the data can be finally output through the USB port, and the output signal can be directly observed on an oscilloscope connected with the USB port or input to an upper computer for analysis and processing.
Claims (4)
1. The utility model provides a non-invasive power line communication noise signal obtains appearance, includes the instrument shell and locates the circuit board in the instrument shell, is equipped with the power supply circuit unit, coupling circuit unit, AD converting circuit unit and the core processing chip unit that connect gradually on this circuit board, its characterized in that:
the instrument shell is provided with a plug which can be inserted into a socket arranged on a power line circuit to be connected with a power line, and the plug is connected with the power circuit unit.
2. The non-invasive powerline communication noise signal acquisition instrument of claim 1, wherein:
the circuit board is also provided with a USB control chip unit which is connected with the core processing chip unit;
the instrument shell is also provided with an output/write-in selector switch and a USB port for connecting with external equipment to exchange data, and the USB port and the output/write-in selector switch are respectively connected with the USB control chip unit;
the output/write changeover switch switches between an output on state in which a core processing chip unit outputs data to an external device connected to the USB port and a write on state in which the external device connected to the USB port writes data to the core processing chip unit.
3. The non-invasive powerline communication noise signal acquisition instrument of claim 2, wherein:
the instrument shell is also provided with an output indicator light and a write indicator light, and the output indicator light and the write indicator light are respectively connected with the USB control chip unit;
the output indicator light is turned on when the output/write changeover switch is in an output on state, and the output indicator light is turned off when the output/write changeover switch is in a write on state;
the write indicator lamp is turned on when the output/write changeover switch is in the write-on state, and the write indicator lamp is turned off when the output/write changeover switch is in the output-on state.
4. The non-intrusive powerline communication noise signal acquisition instrument of claim 3, wherein: and a secondary filtering and amplifying circuit is connected between the USB control chip unit and the core processing chip unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021661583.XU CN212543777U (en) | 2020-08-11 | 2020-08-11 | Non-invasive power line communication noise signal acquisition instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021661583.XU CN212543777U (en) | 2020-08-11 | 2020-08-11 | Non-invasive power line communication noise signal acquisition instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212543777U true CN212543777U (en) | 2021-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021661583.XU Active CN212543777U (en) | 2020-08-11 | 2020-08-11 | Non-invasive power line communication noise signal acquisition instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212543777U (en) |
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2020
- 2020-08-11 CN CN202021661583.XU patent/CN212543777U/en active Active
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