CN113395089A - Communication method and device based on power line - Google Patents
Communication method and device based on power line Download PDFInfo
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- CN113395089A CN113395089A CN202110644624.7A CN202110644624A CN113395089A CN 113395089 A CN113395089 A CN 113395089A CN 202110644624 A CN202110644624 A CN 202110644624A CN 113395089 A CN113395089 A CN 113395089A
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Abstract
A communication method and device based on power lines are characterized by comprising the following steps: performing voltage phase detection on the alternating current on the power line to determine a synchronous reference voltage phase; chopping the alternating current in a half period of the voltage waveform of the alternating current according to the phase of the synchronous reference voltage and chopping time, wherein the chopping time corresponds to transmission data formed by combining more than 2 data elements; and transmitting the chopped alternating current to a receiving end through the power line. Compared with the prior art, the invention has the advantages of simple structure, small volume, convenient use and high information transmission speed.
Description
Technical Field
The invention relates to the field of power communication, in particular to a communication technology based on a power line.
Background
In the existing power line communication technology, a high-frequency signal carrying information is generally loaded on a power line and then transmitted by the power line, and a receiving end separates the high-frequency signal to implement power line carrier communication. Although this technique can transmit a large amount of communication information quickly, the required carrier sending device and signal separation device have complicated structure, large volume and high cost, so that the application is greatly limited, and the technique is difficult to be applied to communication in smart homes. Patent application CN201810439005.2 discloses a power line carrier technology, in which chopping is performed based on a reference phase in more than one ac voltage cycle in a chopping manner, and the chopped time length mapped by data elements constituting transmission data are obtained, so that, along with the transmission of electric power, information including chopping is also transmitted, and the chopped information is separated at the receiving end, so as to obtain the data elements constituting the transmission data corresponding to the chopped time length, thereby realizing power line carrier communication. According to the technology, only one data element is transmitted in each alternating voltage period, and a complete data, such as a byte, is composed of 8-bit data elements, so that 8 alternating voltage periods are needed for transmitting one byte, and a plurality of bytes are often needed for completing the transmission of one information, so that the transmission speed of the information is very slow, and the waveform of the alternating voltage is very easily interfered, such as the starting of a certain household appliance, the waveform of the alternating voltage can be influenced, so that the transmitted information is distorted, and the information transmission fails.
Disclosure of Invention
The invention aims to provide a communication method and a communication device based on a power line, which have the advantages of simple structure, small volume, convenience in use and high information transmission speed.
The communication method based on the power line is realized by the following steps:
performing voltage phase detection on the alternating current on the power line to determine a synchronous reference voltage phase;
chopping the alternating current in a half period of the voltage waveform of the alternating current according to the phase of the synchronous reference voltage and chopping time, wherein the chopping time corresponds to communication data formed by combining more than 2 data elements;
and transmitting the chopped alternating current to a receiving end through the power line.
The data transmitted by the communication is usually data, and the data is composed of data elements, and the data elements are usually binary "0" and "1", so that the 10-system 0 is converted into binary "0", the 10-system 1 is converted into binary "1", the 10-system 2 is converted into binary "01", the 10-system 3 is converted into binary "11", the 10-system 4 is converted into binary "001", the 10-system 5 is converted into binary "101", the 10-system 6 is converted into binary "011", the 10-system 7 is converted into binary "111", and the 10-system 8 is converted into binary "0001" … …, so that the data elements correspond to "0", "1", "01", "11", "001", and "10", respectively, according to the chopping duration from short to long, "101", "011", "111", "0001" … …, so the transmitted information is data composed of several data elements, and matches with the transmission speed of half period, thereby compared with the prior art, the communication speed is significantly improved on the premise of simple structure, small volume and convenient use.
Here, the synchronous reference voltage phase is zero or an integer of pi, a chopping time period range in which several chopping points are set is determined within a half cycle of the voltage waveform of the alternating current, and the chopping time period is from the synchronous reference voltage phase to the chopping point. The chopping time period range is provided with a plurality of chopping points, and under the condition of avoiding detection data errors caused by detection errors, the half-period duration of the voltage waveform is fully utilized, and the number of the chopping durations is increased to the maximum extent, so that more different data corresponding to the chopping durations can be acquired, and the data volume transmitted by communication can be increased.
Here, when the synchronous reference voltage phase is zero or an integer of pi, the duration of the chopping period is less than a half cycle of the voltage waveform of the alternating current, the start time of the chopping period differs from the synchronous reference voltage phase by a delay period, and chopping starts from the synchronous reference voltage phase. When the voltage phase of the alternating current is detected, the phase of zero or pi integer is often detected by detecting the phase of zero voltage value, and the detecting device (such as an optical coupler) has a zero crossing dead zone, namely, after the zero voltage is passed, the detecting device reacts after the voltage reaches a certain value, the chopping time period is less than half period of the voltage waveform of the alternating current, and the difference between the initial time of the chopping time period and the phase of the synchronous reference voltage is a delay time period, so that the condition that the chopping time length caused by the zero crossing dead zone of the detecting device is covered by the zero crossing dead zone time length of the detecting device, and the chopping time length is distorted can be avoided.
Here, in order to ensure the accuracy of the chopping time length, when the phase of the synchronous reference voltage is zero or an integer of pi, a theoretical voltage value at the phase of the chopping point of the chopping time length is obtained according to the chopping time length, the frequency of the alternating current, the highest voltage value, and the lowest voltage value, and a corrected chopping time length, that is, an actual chopping time length, is obtained by detecting the actual chopping time length of the theoretical voltage value when the phase of the chopping point is reached.
Because the voltage phase detection of the alternating current is determined by the properties of the detection device, the detection of the phase of zero or pi integer is usually realized by detecting the phase when the voltage value is zero, and the detection device (such as an optical coupler) has a zero-crossing dead zone, that is, when the voltage is lower than a certain value, the detecting device will not react, at this time, it is judged that the zero voltage has been reached, and the zero voltage has not been reached in practice, in this case, chopping is performed according to the chopping time length before correction, which may cause the phase of the chopping point to be inaccurate (the actual chopping time length is short), and when the method for detecting the chopping time length at the receiving end is adopted to rectify the chopping time length into a square wave, the low potential is between the phase from zero phase to the actual chopping point, so that the measured chopping time does not correspond to the chopping time theoretically corresponding to the communication data, and the demodulated communication data is inaccurate or even fails; the method comprises the steps of obtaining actual chopping time by adopting double-axis correction of voltage and time (reaching the chopping point phase position), correcting the chopping time by the actual chopping time, and obtaining the corrected chopping time, so that the phase position of the chopping point of the chopping time corresponds to the phase position of a theoretical voltage value, and the accuracy of communication data transmitted by chopping is ensured.
Further, the alternating current frequency is detected, the data sent by the alternating current power chopped according to the real-time alternating current frequency comprises head frame data and communication data, and the head frame data comprises a check value obtained according to the data of the longest duration and the shortest duration in the chopping durations corresponding to the communication data.
Because the bus of the power grid is influenced by the electric appliance or harmonic waves, the 50HZ fundamental wave of the power grid can shake about 1 percent, so that the chopping point is unstable, the chopping time length detected by the receiving end does not correspond to the data, and the data sent by the AC power after chopping comprises the head frame data. Of course, the header frame may enable the receiving end to know that the data is coming and perform the data receiving operation.
Here, the number of chopping points in the chopping period in a half cycle of the alternating current is 2nThe data corresponding to the chopping time period of the half cycle of the alternating current is binary data composed of n data elements, and n =2, 3, 4, and … ….
It is clear that the communication speed of the present patent application technique is significantly faster than the prior art (patent application CN 201810439005.2) by at least 2 (two data elements) × 2 (two half cycles) =4 times.
Preferably, n = 4.
The chopping time length corresponds to binary data formed by four data elements, and encoding, decoding and communication are facilitated. Moreover, one BYTE can be transmitted in one cycle (BYTE, consisting of 8 binary data elements "0" and "1"), while the communication speed is significantly faster than in the prior art (8 times that of the CN201810439005.2 patent application).
Here, the half cycle of the alternating current is divided into a delay time period, a chopping time period, and a power supply time period in this order. Therefore, during chopping, the half cycle of the whole alternating current is prevented from being chopped, and the electric appliance for supplying power is ensured to maintain the working state.
Further, when the alternating current is disturbed to cause voltage waveform jitter, the voltage waveform of the alternating current is ensured to be stable in a voltage compensation mode. The method is influenced by the working of other electrical appliances, for example, when a high-power electrical appliance such as an air conditioner and the like is started, the voltage of the alternating current is instantaneously reduced, the waveform of the alternating current is shaken, and therefore, after a receiving end receives and rectifies chopped alternating voltage signals, intermittent high-low level square waves are formed instead of continuous high-low level square waves, interference is caused to the detection of the chopping time length, and the stability of the sine wave of the alternating current voltage waveform is ensured by means of voltage compensation, so that after the receiving end receives and rectifies the chopped alternating voltage signals, the intermittent high-low level square waves are not formed, the complete high-low level square waves are formed, and the accuracy and the reliability of the detection of the chopping time length are ensured.
A power line based communication method, comprising:
receiving a voltage signal of alternating current transmitted on a power line;
performing bridge rectification on the voltage signal of the alternating current, and detecting the chopping time of the bridge-rectified voltage signal;
and demodulating communication data which is carried by the alternating current and is formed by combining more than 2 data elements according to the chopping duration.
Further, after receiving and performing bridge rectification on a voltage signal of the alternating current transmitted on the power line, detecting a voltage corresponding to a chopping point phase position, obtaining a theoretical chopping time length which is closest to the detected chopping time length and corresponds to the voltage value according to the voltage value and the detected chopping time length, wherein the theoretical chopping time length is the corrected chopping time length, and demodulating communication data carried by the alternating current according to the corrected chopping time length.
Because the power grid bus is influenced by the electric appliance or the harmonic wave, the 50HZ fundamental wave of the power grid will fluctuate by about 1%, thus the time interval will be unstable, so that the chopping time interval detected by the receiving end does not correspond to the data, and the waveform of the voltage sine wave is determined, and a plurality of chopping points are set in the chopping time interval, so that the voltage corresponding to each chopping point is fixed and constant, and only at symmetrical time points, the voltage may be the same, such as the voltage at the sin30 ° phase point and the voltage at the sin150 ° phase point are the same, and the two chopping points are difficult to distinguish only by the voltage, but can be distinguished by the double-axis correction of the voltage and the time (namely the detected chopping time interval), so that the phase position of the chopping point of the time interval of the jittered fundamental wave can be obtained by the voltage and time correction, and then, the phase position of the chopping point of the chopping time of the standard fundamental wave before jitter is compared with the chopping time length, so that the corrected chopping time length is obtained, and accordingly, the corresponding accurate communication data is obtained through the corrected chopping time length.
The communication device based on the power line is realized by the following steps that the communication device comprises a synchronous phase detection circuit, a first processor and a time sharing control circuit, wherein the power input end of the synchronous phase detection circuit and the power input end of the time sharing control circuit are connected with the power line, the electric signal input end of the first processor is connected with the electric signal output end of the synchronous phase detection circuit, the electric signal output end of the first processor is connected with the electric signal input end of the time sharing control circuit, and the output power of the time sharing control circuit is output to a receiving end.
When the synchronous phase detection circuit works, a sine wave alternating current power supply is rectified into a half-period direct current power supply by a first bridge rectifier circuit, each half-period direct current starts at zero, an optical coupler is not conducted at zero and is conducted after the zero, synchronous phase detection at zero can be realized by detecting whether the optical coupler is conducted or not, a first processor controls a time-sharing control circuit to chop the alternating current power supply according to the preset chopping wavelength corresponding to transmission data formed by combining more than 2 data elements, the chopped alternating current power supply is output to a receiving end, so that the receiving end receives waveform signals of the chopped alternating current power supply and demodulates the corresponding transmission data formed by combining more than 2 data elements.
Here, the two power input terminals of the first bridge rectifier circuit are connected in series with resistors R1 and R2, respectively. Resistance R1, R2's effect is the step-down effect, because the electric current passes through the resistance, can generate heat, and generate heat to a certain extent, can change the resistance of resistance, thereby influence the accuracy that detects at zero point, this patent application technique adopts first bridge rectifier circuit's two power input ends to have concatenated resistance R1 respectively, R2, thus, by two resistance R1, R2 undertakes half cycle's electric current respectively, thereby avoid effectively because of the resistance is because of continuous electric current effect (if concatenate the step-down resistance at first bridge rectifier circuit's output, what patent application CN201810439005.2 adopted is after the vary voltage, the technique of concatenating resistance), make generate heat and reach the emergence of the condition of changing the resistance of resistance.
Here, in order to ensure the waveform stability of the power supply before chopping, a voltage compensation circuit for ensuring the waveform stability of the power supply is connected to the power supply input terminal of the time-sharing control circuit. When the time-sharing control circuit works, if the voltage of the alternating current power supply drops instantaneously due to the influence of the outside (such as when large-scale high-power electric appliances such as an air conditioner and the like are started), the sine waveform of the alternating current voltage is enabled to shake, and at the moment, the voltage drop part is compensated through the voltage compensation circuit, so that the sine waveform of the voltage of the alternating current input to the power supply input end of the time-sharing control circuit is ensured to be stable.
The communication device based on the power line is realized by the signal monitoring circuit and the second processor, and is characterized in that the signal monitoring circuit comprises a second bridge rectifier circuit and a square wave rectifier circuit, the electric signal input end of the second bridge rectifier circuit is connected with a power supply with a chopping signal, the electric signal output end of the second bridge rectifier circuit is connected with the electric signal input end of the square wave finishing circuit, and the electric signal output end of the square wave finishing circuit is connected with the electric signal input end of the second processor.
When the chopping circuit works, the chopping power supply is rectified into direct current through the second bridge rectifier circuit, then the direct current is rectified into square waves through the square wave rectifier circuit, the second processor obtains chopping time length according to zero-value electric signals among the square waves, and demodulates corresponding transmission data formed by combining more than 2 transmitted data elements according to the time length.
Here, the output end of the second bridge rectifier circuit of the signal sensing circuit is connected in parallel with a voltage detection circuit, and the electric signal output end of the voltage detection circuit is connected with the electric signal input end of the second processor. When the data transmission device works, the second processor obtains the theoretical chopping time length according to the voltage of the chopping point and the detected chopping time length, so that the detected chopping time length can be corrected according to the theoretical chopping time length, the corrected chopping time length can be obtained, and accurate transmission data formed by more than 2 data elements through combination can be demodulated according to the corrected chopping time length.
Compared with the prior art, the invention has the beneficial effects that: the device has the advantages of simple structure, small volume, convenient use and high information transmission speed.
Drawings
Fig. 1 is a schematic diagram of a communication structure of a power line according to the present invention;
FIG. 2 is a circuit diagram of a synchronous phase detection circuit;
FIG. 3 is a graph showing the correspondence between AC waveform, chopping duration, and transmission data;
FIG. 4 is a waveform diagram at the zero crossing point of the optocoupler;
fig. 5 is a signal sensing circuit diagram.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings and examples:
as shown in fig. 1, the communication device based on power line of the present invention is implemented by including a synchronous phase detection circuit 1, a first processor 2, and a time-sharing control circuit 3, wherein a power input terminal of the synchronous phase detection circuit 1 and a power input terminal of the time-sharing control circuit 3 are connected to a power line 4, an electrical signal input terminal of the first processor 2 is connected to an electrical signal output terminal of the synchronous phase detection circuit 1, an electrical signal output terminal of the first processor 2 is connected to an electrical signal input terminal of the time-sharing control circuit 3, and an output power of the time-sharing control circuit 3 is output to a receiving terminal, as shown in fig. 2, the communication device based on power line of the present invention is characterized in that the synchronous phase detection circuit 1 includes a first bridge rectifier circuit D1, an optical coupler U1 connected to an output terminal of the first bridge rectifier circuit D1, and an electrical signal output terminal of the optical coupler U1 is connected to an electrical signal input terminal of the first processor 2.
Preferably, as shown in fig. 2, two power input terminals of the first bridge rectifier circuit D1 are respectively connected in series with resistors R1 and R2.
Preferably, as shown in fig. 1, a voltage compensation circuit 5 for ensuring the stability of the power waveform is connected to the power input terminal of the time-sharing control circuit 3.
Preferably, the optical coupler U1 is a linear optical coupler, and the first processor 2 adopts a single-chip ADC sampling circuit.
The communication method based on the power line is realized by the following steps:
voltage phase detection is carried out on the alternating current on the power line 4 through the synchronous phase detection circuit 1 and the first processor 2 to determine a synchronous reference voltage phase;
as shown in fig. 3, the time-sharing control circuit 3 is controlled by the first processor 2 to perform chopping processing on the alternating current within a half cycle of a voltage waveform of the alternating current according to the phase of the synchronous reference voltage and a chopping time length, wherein the chopping time length corresponds to transmission data formed by combining more than 2 data elements;
the chopped ac power is transmitted to a receiving end and a load 6 (e.g., an electric light source) via the power line 4.
Preferably, the synchronous reference voltage phase is zero or an integer of pi, the chopping period S1 range is determined within a half cycle of the voltage waveform of the alternating current, the range of "0" to "F" as shown in fig. 3, the chopping points corresponding to 16 chopping periods are set in the chopping period S1 range, 16 chopping points are set in total as shown in fig. 3 as "0" to "F", the chopping period S2 starts from the synchronous reference voltage phase O until the chopping point, and the chopping period T0 constituting the head frame data starts from the synchronous reference voltage phase zero point to one of "0" to "F".
Preferably, when the phase of the synchronous reference voltage is zero or an integer of pi, the chopping period S1 has a duration less than a half cycle of the voltage waveform of the alternating current, the starting time of the chopping period S1 differs from the phase O of the synchronous reference voltage by a delay period S3, and the chopping period is calculated from the phase O of the synchronous reference voltage.
As shown in fig. 4, by using an optical coupler (linear optical coupler), after a zero crossing point, there is a zero crossing point dead zone a, which generally has 0.8-1.5 milliseconds, and if the zero crossing point dead zone a is included in the chopping time period S1, there will be a time period located in the zero crossing point dead zone a, which results in that the data to be transmitted cannot be correctly reflected. By adopting the time delay period S3, the dead zone a of the zero point can be effectively avoided, and the chopping time length can correctly reflect the data required to be transmitted.
Preferably, when the phase of the synchronous reference voltage is zero or an integer of pi, a theoretical voltage value at the phase of a chopping point of the chopping time is obtained according to the chopping time, the frequency of the alternating current, the highest voltage value and the lowest voltage value, and a corrected chopping time, which is the actual chopping time, is obtained by detecting the actual chopping time of the theoretical voltage value when the phase of the chopping point is reached. The voltage detection is realized by matching a linear optocoupler with an ADC sampling circuit of the singlechip.
As shown in fig. 3, preferably, the data transmitted by the ac power which is detected in the ac power frequency and chopped according to the real-time ac power frequency includes a header frame data and a communication data, and the header frame data includes a check value obtained according to data of the longest duration and the shortest duration in the corresponding chopping durations in the communication data.
Preferably, the number of chopping time periods within the chopping time period S1 in one half cycle of the alternating current is 2nThe data corresponding to the chopping time period of the half cycle of the alternating current is binary data composed of n data elements, and n =2, 3, 4, and … ….
Preferably, n = 4.
Preferably, the half cycle of the alternating current is divided into the delay period S3, the chopping period S1, and the power supply period S4 in this order.
Preferably, when the voltage waveform is jittered due to disturbance of the alternating current, the voltage waveform of the alternating current is ensured to be stable by means of compensating the voltage of the voltage compensation circuit 5.
The communication device based on the power line is realized by the following steps that the communication device comprises a signal monitoring circuit 7 and a second processor 8, and is characterized in that the signal monitoring circuit 7 comprises a second bridge rectifier circuit D2 and a square wave rectifier circuit 701, the electric signal input end of the second bridge rectifier circuit D2 is connected with a power supply with a chopping signal, the electric signal output end of the second bridge rectifier circuit D2 is connected with the electric signal input end of the square wave finishing circuit 701, and the electric signal output end of the square wave finishing circuit 701 is connected with the electric signal input end of the second processor 8.
Preferably, the output end of the second bridge rectifier circuit of the signal sensing circuit is connected in parallel with the voltage detection circuit 9, and the electrical signal output end of the voltage detection circuit 9 is connected with the electrical signal input end of the second processor 8. The voltage detection circuit 9 is a linear optical coupler, the second processor 8 is a single-chip microcomputer ADC sampling circuit, and the linear optical coupler is matched with the single-chip microcomputer ADC sampling circuit to realize voltage and time detection.
A power line based communication method, comprising:
receiving a voltage signal of alternating current transmitted on a power line through a signal monitoring circuit 7;
the voltage signal of the alternating current is subjected to bridge rectification through a second bridge rectification circuit D2, and the voltage signal subjected to bridge rectification is converted into a square wave signal through a square wave rectification circuit 701;
and demodulating communication data carried by the alternating current according to the high-low point level duration time in the square wave signal and preset transmission data formed by combining more than 2 data elements corresponding to the chopping time length, decoding a control signal according to the communication data, and controlling the work of the load 6 through a control device 601 of the load 6.
Preferably, after receiving a voltage signal of the alternating current transmitted on the power line, bridge rectification is performed on the voltage signal of the alternating current through a second bridge rectifier circuit D2, a value of a voltage corresponding to a chopping point phase position is detected and timed through a second processor 8 which constitutes a linear optocoupler of the voltage detection circuit 9 and serves as a sampling circuit of the single chip ADC, so as to obtain a detected chopping time length, a theoretical chopping time length which is closest to the detected chopping time length and corresponds to the value of the voltage is obtained according to the value of the voltage and the detected chopping time length, the theoretical chopping time length is a corrected chopping time length, and communication data carried by the alternating current is demodulated according to the corrected chopping time length. After the linear optocoupler and the single chip ADC sampling circuit are adopted, the single chip ADC sampling circuit also has the effect of detecting the chopping time, so that the square wave finishing circuit 701 is not needed, and the purpose of accurately detecting the chopping time can be realized.
Preferably, the chopping time duration corresponding to the data of the head frame is obtained first, and the chopping time duration of the voltage signal of the alternating current power received subsequently after the head frame is corrected according to the chopping time duration corresponding to the data of the head frame, so as to obtain the communication data corresponding to the corrected chopping time duration.
Claims (17)
1. A power line based communication method, comprising:
performing voltage phase detection on the alternating current on the power line to determine a synchronous reference voltage phase;
chopping the alternating current in a half period of the voltage waveform of the alternating current according to the phase of the synchronous reference voltage and chopping time, wherein the chopping time corresponds to communication data formed by combining more than 2 data elements;
and transmitting the chopped alternating current to a receiving end through the power line.
2. The power-line-based communication method according to claim 1, wherein the synchronous reference voltage phase is zero or an integer of pi, a chopping time period range in which a plurality of chopping points are set is determined within a half cycle of the voltage waveform of the alternating current, and the chopping time period is from the synchronous reference voltage phase to the chopping point.
3. The power-line-based communication method according to claim 2, wherein when the synchronous reference voltage phase is zero or an integer of pi, the duration of the chopping time period is less than a half cycle of the voltage waveform of the alternating current, the start time of the chopping time period differs from the synchronous reference voltage phase by a delay time period, and chopping is started from the synchronous reference voltage phase.
4. The power line-based communication method according to claim 1, wherein when the phase of the synchronous reference voltage is zero or an integer of pi, a theoretical voltage value at the phase of a chopping point of the chopping time is obtained according to the chopping time, and the frequency, the highest voltage value, and the lowest voltage value of the alternating current, and a corrected chopping time, which is an actual chopping time, is obtained by detecting an actual chopping time of the theoretical voltage value when the phase of the chopping point is reached.
5. The power-line-based communication method according to claim 4, wherein the ac power frequency is detected, and the data transmitted by the ac power chopped according to the real-time ac power frequency includes header frame data and communication data, the header frame data including a check value obtained from data of the longest and shortest of the chopping durations corresponding to the communication data.
6. The power-line-based communication method according to claim 2, 3 or 4, wherein the number of chopping points in the chopping time period within a half cycle of the alternating current is 2nThe data corresponding to the chopping time period of the half cycle of the alternating current is binary data composed of n data elements, and n =2, 3, 4, and … ….
7. The power-line based communication method according to claim 6, wherein n = 4.
8. The power-line-based communication method according to claim 1 or 2 or 3 or 4 or 5 or 7, characterized in that a half cycle of the alternating current is divided into a delay time period, a chopping time period and a power supply time period in this order.
9. The power line-based communication method according to claim 1 or 2 or 3 or 4 or 5 or 7, wherein when the alternating current is disturbed to cause the voltage waveform to be jittered, the stabilization of the alternating current voltage waveform is ensured by means of the compensation voltage.
10. A power line based communication method, comprising:
receiving a voltage signal of alternating current transmitted on a power line;
performing bridge rectification on the voltage signal of the alternating current, and detecting the chopping time of the bridge-rectified voltage signal;
and demodulating communication data which is carried by the alternating current and is formed by combining more than 2 data elements according to the chopping duration.
11. The power line-based communication method according to claim 10, wherein after receiving and bridge rectifying a voltage signal of the alternating current transmitted on the power line, a voltage corresponding to a phase of a chopping point is detected, a theoretical chopping time corresponding to the voltage value and closest to the detected chopping time is obtained according to the voltage value and the detected chopping time, the theoretical chopping time is a corrected chopping time, and communication data carried by the alternating current is demodulated according to the corrected chopping time.
12. The power-line-based communication method according to claim 11, wherein the chopping time duration corresponding to the data of the head frame is obtained first, and the chopping time duration of the voltage signal of the ac power received subsequently after the head frame is corrected according to the chopping time duration corresponding to the data of the head frame, so as to obtain the communication data corresponding to the corrected chopping time duration.
13. The utility model provides a communication device based on power line, including synchronous phase detection circuit, first treater, the timesharing control circuit, the power input end of synchronous phase detection circuit, the power input end of timesharing control circuit is connected with the power line, the signal of telecommunication input end and the signal of telecommunication output end of synchronous phase detection circuit of first treater are connected, the signal of telecommunication output end and the signal of telecommunication input end of timesharing control circuit of first treater link to each other, the output power output of timesharing control circuit is to the receiving terminal, its characterized in that synchronous phase detection circuit includes first bridge rectifier circuit, the opto-coupler that links to each other with first bridge rectifier circuit output, opto-coupler signal of telecommunication output end links to each other with the signal of telecommunication input end of first treater.
14. The power line-based communication device according to claim 13, wherein the two power input terminals of the first bridge rectifier circuit are respectively connected in series with resistors R1 and R2.
15. The power-line-based communication device according to claim 13 or 14, wherein a voltage compensation circuit for ensuring the stability of the power waveform is connected to the power input terminal of the time-sharing control circuit.
16. The utility model provides a communication device based on power line, includes signal monitoring circuit, second treater, its characterized in that signal monitoring circuit includes second bridge rectifier circuit, square wave rectifier circuit, and second bridge rectifier circuit's signal of telecommunication input end links to each other with the power that has the chopping signal, and second bridge rectifier circuit's signal of telecommunication output links to each other with square wave arrangement circuit's signal of telecommunication input end, and square wave arrangement circuit's signal of telecommunication output end links to each other with the signal of telecommunication input end of second treater.
17. The power-line based communication device according to claim 16, wherein the output terminal of the second bridge rectifier circuit of the signal sensing circuit is connected in parallel with a voltage detection circuit, and the electrical signal output terminal of the voltage detection circuit is connected to the electrical signal input terminal of the second processor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310342515.9A CN116192202A (en) | 2021-06-09 | 2021-06-09 | Communication device based on power line |
| CN202110644624.7A CN113395089B (en) | 2021-06-09 | 2021-06-09 | Communication method and device based on power line |
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| CN202110644624.7A CN113395089B (en) | 2021-06-09 | 2021-06-09 | Communication method and device based on power line |
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| CN202310342515.9A Division CN116192202A (en) | 2021-06-09 | 2021-06-09 | Communication device based on power line |
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| CN113395089A true CN113395089A (en) | 2021-09-14 |
| CN113395089B CN113395089B (en) | 2023-05-05 |
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| CN202110644624.7A Active CN113395089B (en) | 2021-06-09 | 2021-06-09 | Communication method and device based on power line |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202085350U (en) * | 2011-04-20 | 2011-12-21 | 英飞特电子（杭州）有限公司 | Two-wire dimmer |
| CN104320160A (en) * | 2014-10-21 | 2015-01-28 | 罗震 | Data receiving and dispatching method, device and system |
| CN204145494U (en) * | 2014-10-21 | 2015-02-04 | 罗震 | A kind of data sending device and a kind of receiving system |
| CN110784971A (en) * | 2019-08-20 | 2020-02-11 | 管德贵 | Lamp control system adopting alternating current chopping to transmit data |
| CN214959535U (en) * | 2021-06-09 | 2021-11-30 | 肇庆市跃达智能科技有限公司 | Communication device based on power line |
-
2021
- 2021-06-09 CN CN202310342515.9A patent/CN116192202A/en not_active Withdrawn
- 2021-06-09 CN CN202110644624.7A patent/CN113395089B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202085350U (en) * | 2011-04-20 | 2011-12-21 | 英飞特电子（杭州）有限公司 | Two-wire dimmer |
| CN104320160A (en) * | 2014-10-21 | 2015-01-28 | 罗震 | Data receiving and dispatching method, device and system |
| CN204145494U (en) * | 2014-10-21 | 2015-02-04 | 罗震 | A kind of data sending device and a kind of receiving system |
| CN110784971A (en) * | 2019-08-20 | 2020-02-11 | 管德贵 | Lamp control system adopting alternating current chopping to transmit data |
| CN214959535U (en) * | 2021-06-09 | 2021-11-30 | 肇庆市跃达智能科技有限公司 | Communication device based on power line |
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| Publication number | Publication date |
|---|---|
| CN113395089B (en) | 2023-05-05 |
| CN116192202A (en) | 2023-05-30 |
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Effective date of registration: 20230814 Address after: A2 4th floor, Hantian science and Technology City, Shenhai Road, Guicheng, Nanhai, Foshan City, Guangdong Province 528200 Patentee after: FOSHAN HUIHAO INTELLIGENT TECHNOLOGY Co.,Ltd. Address before: 526100 30m north of Shangjing Xiyuan, Nanxing Fourth Road, Nan'an, Gaoyao District, Zhaoqing City, Guangdong Province Patentee before: Zhaoqing Yueda Intelligent Technology Co.,Ltd. |