CN211348453U - Multifunctional mains supply signal acquisition circuit - Google Patents
Multifunctional mains supply signal acquisition circuit Download PDFInfo
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- CN211348453U CN211348453U CN201921576552.1U CN201921576552U CN211348453U CN 211348453 U CN211348453 U CN 211348453U CN 201921576552 U CN201921576552 U CN 201921576552U CN 211348453 U CN211348453 U CN 211348453U
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Abstract
The utility model discloses a multi-functional commercial power signal acquisition circuit, including sine wave signal source, commercial power input circuit, rectifier circuit, optoelectronic coupling circuit, direct current supply circuit and signal output terminal, sine wave signal source's output with commercial power input circuit's input electricity is connected, commercial power input circuit's output with rectifier circuit's input electricity is connected, rectifier circuit's output with optoelectronic coupling circuit's input electricity is connected, direct current supply circuit's output and optoelectronic coupling circuit's output all with signal output terminal electricity is connected. The utility model discloses circuit structure is comparatively simple to manufacturing cost is lower.
Description
Technical Field
The utility model relates to a power control technical field, in particular to multi-functional commercial power signal acquisition circuit.
Background
In the technical field of power supplies and control thereof, voltage, frequency and zero-crossing points of mains supply are often required to be collected so as to realize control of electric equipment. The following application scenarios are common:
1) in the application in intelligent wiring board, need detect the power of the consumer of inserting on this wiring board, except that obtaining the power consumption current from embedded current sensor this moment, still need detect the voltage of input commercial power. At the same time, the operating voltage and frequency need to be displayed on the control APP. Then the voltage and frequency signals of the mains need to be sampled. With the voltage signal, overvoltage and undervoltage protection can be carried out on the electric equipment plugged on the board.
2) In a power monitoring system, voltage and frequency signals need to be monitored in real time, when a power grid fails, the monitoring system needs to respond at the first time, record events and send signals, and even under the condition that no standby power supply exists, the events need to be stored in a power failure storage memory and send information before the system is powered down and shut down. The signal acquisition circuit plays a significant role in the system.
3) In the occasions of dimming lamps and electricity utilization of high-power equipment, a thyristor is required to avoid the peak time of a mains supply sine wave and conduct the thyristor when the peak time reaches the bottom valley zero crossing point so as to avoid the damage of the equipment caused by an overlarge surge signal at the moment of switching. At this time, the detection of the zero crossing point of the commercial power signal is very critical.
At present, according to the application requirements, a conventional signal acquisition method uses a plurality of sets of corresponding signal acquisition circuits, so that the circuit structure is complex and tedious, and the cost is higher.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in that, a multi-functional commercial power signal acquisition circuit is provided, circuit structure is comparatively simple, manufacturing cost is lower.
In order to solve the technical problem, the technical scheme of the utility model is that:
the utility model provides a multi-functional commercial power signal acquisition circuit, includes sine wave signal source, commercial power input circuit, rectifier circuit, photoelectric coupling circuit, direct current supply circuit and signal output terminal, sine wave signal source's output with commercial power input circuit's input electricity is connected, commercial power input circuit's output with rectifier circuit's input electricity is connected, rectifier circuit's output with photoelectric coupling circuit's input electricity is connected, direct current supply circuit's output and photoelectric coupling circuit's output all with signal output terminal electricity is connected.
Preferably, the utility power input circuit includes a resistor R2 and a resistor R3, and one end of the resistor R2 and one end of the resistor R3 are both connected to the sine wave signal source.
Preferably, the rectifier circuit includes a diode D1, a diode D2, a diode D3 and a diode D4, a cathode of the diode D1 is connected to a cathode of the diode D2, an anode of the diode D2 and a cathode of the diode D4 are both connected to the other end of the resistor R2, an anode of the diode D4 is connected to an anode of the diode D3, and an anode of the diode D1 and a cathode of the diode D3 are both connected to the other end of the resistor R3.
Preferably, the photoelectric coupling circuit comprises a photoelectric coupler U1 and a capacitor C5, a first pin of the photoelectric coupler U1 is connected with a cathode of the diode D2, a second pin of the photoelectric coupler U1 is connected with an anode of the diode D4, a third pin of the photoelectric coupler U1 is connected with one end of the capacitor C5, and a fourth pin of the photoelectric coupler U1 and the other end of the capacitor C5 are both grounded.
Preferably, the dc power supply circuit includes a dc power supply and a resistor R4, one end of the resistor R4 is connected to a positive electrode of the dc power supply, and the other end of the resistor R4 is connected to a third pin of the photocoupler U1.
Preferably, one end of the capacitor C5 and a third pin of a photocoupler U1 are both connected to the signal output terminal.
By adopting the technical scheme, the utility model provides a multifunctional mains supply signal acquisition circuit, the output of the sine wave signal source in the multifunctional mains supply signal acquisition circuit is electrically connected with the input of the rectifier circuit, the output of the rectifier circuit is electrically connected with the input of the photoelectric coupling circuit, the output of the direct current supply circuit and the output of the photoelectric coupling circuit are both electrically connected with the signal output terminal, the sine wave signal source is used for simulating mains supply input, the rectifier circuit is used for rectifying alternating voltage of mains supply to drive the photoelectric coupling circuit, the direct current supply circuit is insulated and isolated from the sine wave signal source, the photoelectric coupling circuit outputs the acquired composite signal through the signal output terminal, thereby realizing the acquisition of various signals, and the circuit structure of the multifunctional mains supply signal acquisition circuit is simple, the manufacturing cost of the multifunctional mains supply signal acquisition circuit is greatly reduced, and the production cost is low.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a schematic circuit diagram of the present invention;
fig. 3 is a waveform diagram of the signal output of the first embodiment of the signal output terminal of the present invention;
fig. 4 is a waveform diagram of the signal output of the second embodiment of the signal output terminal of the present invention;
fig. 5 is a waveform diagram of the signal output of the third embodiment of the signal output terminal of the present invention;
in the figure, a 1-sine wave signal source, a 2-rectifying circuit, a 3-mains supply input circuit, a 4-photoelectric coupling circuit, a 5-direct current supply circuit and a 6-signal output terminal are arranged.
Detailed Description
The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, the utility model discloses an among the structure block diagram, this multi-functional mains signal acquisition circuit includes sine wave signal source 1, mains input circuit 2, rectifier circuit 3, photoelectric coupling circuit 4, direct current supply circuit 5 and signal output terminal 6, this sine wave signal source 1's output is connected with this mains input circuit 2's input electricity, this mains input circuit 3's output is connected with this rectifier circuit 3's input electricity, this rectifier circuit 3's output is connected with this photoelectric coupling circuit 4's input electricity, this direct current supply circuit 5's output and photoelectric coupling circuit 4's output all are connected with this signal output terminal 6 electricity. It can be understood that, this sine wave signal source 1 is used for simulating the commercial power input, and this commercial power input circuit 2 is used for inserting this simulation commercial power, and this rectifier circuit 3 is used for carrying out the rectification in order to drive this optoelectronic coupling circuit 4 to the alternating voltage of commercial power, and this direct current supply circuit 5 is insulation isolation with this sine wave signal source 1, and this optoelectronic coupling circuit 4 exports via this signal output terminal 6 the composite signal that gathers to realize the collection of multiple signal, the utility model discloses can use all power and intelligent control field needs commercial power voltage, commercial power zero crossing, the occasion of signal acquisition such as frequency.
Specifically, fig. 2 is a schematic circuit diagram of the present invention, and with reference to fig. 1 and fig. 2, the utility power input circuit 2 includes a resistor R2 and a resistor R3, and one end of the resistor R2 and one end of the resistor R3 are both connected to the sine wave signal source; the rectifier circuit 3 comprises a diode D1, a diode D2, a diode D3 and a diode D4, wherein the cathode of the diode D1 is connected with the cathode of the diode D2, the anode of the diode D2 and the cathode of the diode D4 are both connected with the other end of the resistor R2, the anode of the diode D4 is connected with the anode of the diode D3, and the anode of the diode D1 and the cathode of the diode D3 are both connected with the other end of the resistor R3; the photoelectric coupling circuit 4 comprises a photoelectric coupler U1 and a capacitor C5, a first pin of the photoelectric coupler U1 is connected with a cathode of the diode D2, a second pin of the photoelectric coupler U1 is connected with an anode of the diode D4, a third pin of the photoelectric coupler U1 is connected with one end of the capacitor C5, and a fourth pin of the photoelectric coupler U1 and the other end of the capacitor C5 are both grounded; the direct current power supply circuit 5 comprises a direct current power supply and a resistor R4, one end of the resistor R4 is connected with the positive electrode of the direct current power supply, and the other end of the resistor R4 is connected with the third pin of the photoelectric coupler U1; one end of the capacitor C5 and the third pin of the photocoupler U1 are both connected to the signal output terminal VSIN. It is understood that the optocoupler U1 can be a pc354nt optocoupler or the like. The sine1 is a sine wave signal source, mains supply input is simulated, the resistor R2 and the resistor R3 are detection resistors and require 1% of precision, the diode D1-the diode D4 form a rectification circuit which rectifies alternating voltage to drive a photoelectric coupler U1, V _ dc3 is a secondary 3.3V power supply direct current power supply and is insulated and isolated from a primary sine wave signal source vsine1, the secondary side of the photoelectric coupler U1 outputs an acquired composite signal from a signal output terminal VSIN on a C5, the signal amplitude is 0-3.3V, the alternating pulse type is adopted, the composite signal comprises information such as input voltage, input signal frequency and input signal zero crossing points, and various signals can be separated through processing of a single chip microcomputer.
Specifically, fig. 3 is a waveform diagram of the signal output of the first embodiment of the signal output terminal of the present invention, the width of the pulse waveform is narrow, that is, the waveform corresponds to the magnitude of the input voltage, the waveform in fig. 3 is derived and compared from the waveform of the signal output terminal VSIN in fig. 2, the waveform in the upper part is the case of 312V input, the waveform in the lower part is the case of 127V input, the width of the pulse is acquired when the voltage is 1.5V, the reflected duration is very different, the duration corresponding to 312V input is DeltaX 0.0013499s, the duration corresponding to 127V input is DeltaX 0.0035552s, a 1.5V triggered interrupt is set in the single chip, the timer is started from rising edge interrupt, the timing is interrupted to the falling edge, the values thereof are easily obtained, a voltage correspondence-duration correspondence table is established, and the detection of the input voltage is realized. In practical application, the temperature drift of the circuit is corrected through an external temperature sensor so as to realize more accurate signal acquisition. As can be appreciated, when frequency acquisition is performed: the waveform is an enlarged screenshot of the signal output terminal VSIN at the lower right corner of fig. 2, the time length between two pulse peaks or rising edges is detected, shown as 0.01 second, which is the period of the signal, and the frequency is converted into a frequency of 1/period of 1/0.01 of 100Hz, which is the frequency of the full-wave signal after rectification, and the input signal waveform is estimated to be 50 Hz. When waveform zero crossing point acquisition is carried out: as shown in fig. 5, starting the interruption from 1.5V on the rising edge of the waveform and starting the timer, and by the end of the falling edge of the waveform, dividing the obtained time length by 2 to obtain an error value, where the zero crossing point of the input signal is obtained by adding the error value to the starting point of the interruption on the rising edge. Therefore, an accurate zero-crossing point of the input waveform can be obtained, wherein the error value is DeltaX/2, 0.0013501s/2, 0.00067505s, and the zero-crossing point is X1+0.00067505, 0.079495s +0.00067505s and 0.08017 s.
It can be understood that the utility model relates to a rationally, the structure is unique, through real-time on-line monitoring mode, has the efficiency of insulating isolation simultaneously, if commercial power voltage has unusually or outage, the circuit just does not have output pulse, and the singlechip very first time will obtain information, before the energy storage electric capacity energy in the system power supply line has not consumed the completion, the system has enough time to preserve and past send fault information unusual or outage incident. The utility model discloses will be in the simplification, the best use of things through a simple circuit, realizes the collection of multiple signal, has promoted the price/performance ratio and the reliability of product.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.
Claims (6)
1. A multi-functional commercial power signal acquisition circuit which characterized in that: the intelligent control circuit comprises a sine wave signal source, a mains supply input circuit, a rectifying circuit, a photoelectric coupling circuit, a direct current power supply circuit and a signal output terminal, wherein the output end of the sine wave signal source is electrically connected with the input end of the mains supply input circuit, the output end of the mains supply input circuit is electrically connected with the input end of the rectifying circuit, the output end of the rectifying circuit is electrically connected with the input end of the photoelectric coupling circuit, and the output end of the direct current power supply circuit and the output end of the photoelectric coupling circuit are electrically connected with the signal output terminal.
2. The multi-functional mains signal acquisition circuit of claim 1, wherein: the commercial power input circuit comprises a resistor R2 and a resistor R3, and one end of the resistor R2 and one end of the resistor R3 are both connected with the sine wave signal source.
3. The multi-functional mains signal acquisition circuit of claim 2, wherein: the rectifying circuit comprises a diode D1, a diode D2, a diode D3 and a diode D4, wherein the cathode of the diode D1 is connected with the cathode of a diode D2, the anode of a diode D2 and the cathode of a diode D4 are both connected with the other end of the resistor R2, the anode of a diode D4 is connected with the anode of the diode D3, and the anode of a diode D1 and the cathode of the diode D3 are both connected with the other end of the resistor R3.
4. The multi-functional mains signal acquisition circuit of claim 3, wherein: the photoelectric coupling circuit comprises a photoelectric coupler U1 and a capacitor C5, a first pin of the photoelectric coupler U1 is connected with a cathode of the diode D2, a second pin of the photoelectric coupler U1 is connected with an anode of the diode D4, a third pin of the photoelectric coupler U1 is connected with one end of the capacitor C5, and a fourth pin of the photoelectric coupler U1 and the other end of the capacitor C5 are both grounded.
5. The multi-functional mains signal acquisition circuit of claim 4, wherein: the direct current supply circuit comprises a direct current power supply and a resistor R4, one end of the resistor R4 is connected with the positive electrode of the direct current power supply, and the other end of the resistor R4 is connected with the third pin of the photoelectric coupler U1.
6. The multi-functional mains signal acquisition circuit of claim 5, wherein: one end of the capacitor C5 and a third pin of a photoelectric coupler U1 are connected with the signal output terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921576552.1U CN211348453U (en) | 2019-09-20 | 2019-09-20 | Multifunctional mains supply signal acquisition circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921576552.1U CN211348453U (en) | 2019-09-20 | 2019-09-20 | Multifunctional mains supply signal acquisition circuit |
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| CN211348453U true CN211348453U (en) | 2020-08-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114966187A (en) * | 2022-07-27 | 2022-08-30 | 华录易云科技有限公司 | Commercial power voltage monitoring circuit and method and application in traffic signal machine |
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2019
- 2019-09-20 CN CN201921576552.1U patent/CN211348453U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114966187A (en) * | 2022-07-27 | 2022-08-30 | 华录易云科技有限公司 | Commercial power voltage monitoring circuit and method and application in traffic signal machine |
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