CN214174525U - Load recognition device and intelligent switch - Google Patents
Load recognition device and intelligent switch Download PDFInfo
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- CN214174525U CN214174525U CN202120007448.1U CN202120007448U CN214174525U CN 214174525 U CN214174525 U CN 214174525U CN 202120007448 U CN202120007448 U CN 202120007448U CN 214174525 U CN214174525 U CN 214174525U
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Abstract
The utility model provides a load recognition device and intelligent switch, this load recognition device and intelligent switch are applied to the switch and get electric technical field, include: the device comprises a main controller, a resistance-capacitance step-down load identification unit and a full/half-bridge rectification load identification unit; the input end of the resistance-capacitance voltage reduction load identification unit is used for being externally connected with a load to be identified and a mains supply, and the output end of the resistance-capacitance voltage reduction load identification unit is connected with the main controller; the input end of the full/half-bridge rectification load identification unit is used for externally connecting a load to be identified and a mains supply, and the output end of the full/half-bridge rectification load identification unit is connected with the main controller. The utility model discloses accessible resistance-capacitance step-down load identification unit discerns resistance-capacitance step-down load, through full/half-bridge rectification load identification unit discernment full-bridge rectification load and half-bridge rectification load, also promptly the utility model provides an identification structure can support the detection of multiple load type.
Description
Technical Field
The utility model belongs to the technical field of the switch is got, more specifically says, relates to a load recognition device and intelligent switch.
Background
At present, because the most ordinary traditional mechanical wall switch box at home and abroad only has a live wire and does not have the zero line, consequently, when realizing intelligent transformation, often require novel intelligent switch can directly replace original mechanical wall switch, avoid destroying current fitment rewiring, for this novel intelligent switch has all adopted the mode that the electricity was got to the single live wire.
Given that a single live wire switch can only take power on the premise of having a load, and the power taking parameters corresponding to different types of loads are different, how to realize self-identification of the load becomes a problem that needs to be solved urgently by technical staff in the field in order to detect whether different types of loads can meet the use requirements of the intelligent switch.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a load recognition device and intelligent switch to realize the switch and get the self-identification of load in the electric circuit.
In order to achieve the above object, the present invention provides a load recognition device, which comprises:
the device comprises a main controller, a resistance-capacitance step-down load identification unit and a full/half-bridge rectification load identification unit;
the input end of the resistance-capacitance voltage reduction load identification unit is used for being externally connected with a load to be identified and a mains supply, and the output end of the resistance-capacitance voltage reduction load identification unit is connected with the main controller;
the input end of the full/half-bridge rectification load identification unit is used for externally connecting a load to be identified and a mains supply, and the output end of the full/half-bridge rectification load identification unit is connected with the main controller.
Optionally, the input end of the resistance-capacitance step-down load identification unit includes a first input end and a second input end;
the first input end of the resistance-capacitance voltage reduction load identification unit is used for being connected with one end of the load to be identified, and the other end of the load to be identified is connected with a live wire end of a commercial power;
and the second input end of the resistance-capacitance voltage reduction load identification unit is used for being connected with a zero line end of commercial power.
Optionally, the resistance-capacitance step-down load identification unit includes a first diode, a polar capacitor, a first resistor, a second diode, a second resistor, a third resistor, a fourth resistor, a first capacitor, a voltage detection chip, a first photoelectric coupler, a fifth resistor, and a sixth resistor;
the positive end of the first diode is the second input end of the resistance-capacitance step-down load identification unit, and the negative end of the first diode is the first input end of the resistance-capacitance step-down load identification unit;
the positive end of the first diode is grounded after being connected with the negative end of the polar capacitor, the first end of the second resistor, the first end of the first capacitor and the grounding end of the voltage detection chip in a common mode; the negative end of the first diode is connected with the positive end of the second diode;
the negative end of the second diode is connected with the second end of the first resistor, and the first end of the first resistor is respectively connected with the positive end of the polar capacitor and the second end of the fourth resistor;
a second end of the second resistor is connected with a second end of the first capacitor, a first end of the third resistor and a signal input end of the voltage detection chip respectively, and a second end of the third resistor is connected with a first end of the fourth resistor; the signal input end of the voltage detection chip is connected with the negative input end of the first photoelectric coupler, the positive input end of the first photoelectric coupler is connected with the first end of the fifth resistor, and the second end of the fifth resistor is connected with a preset voltage;
the output end of the emitter of the first photoelectric coupler is grounded, and the output end of the collector of the first photoelectric coupler is respectively connected with the first end of the sixth resistor and the main controller;
and the second end of the sixth resistor is connected with a preset voltage.
Optionally, the input end of the full/half-bridge rectification load identification unit includes a first input end and a second input end;
the first input end of the full/half-bridge rectification load identification unit is used for being connected with one end of the load to be identified, and the other end of the load to be identified is connected with a live wire end of a commercial power;
and the second input end of the full/half-bridge rectification load identification unit is used for being connected with a zero line end of commercial power.
Optionally, the full/half-bridge rectification load identification unit includes a positive half cycle identification circuit and a negative half cycle identification circuit;
the first input end of the positive half cycle identification circuit is connected with the first input end of the negative half cycle identification circuit to form a connection point which is the first input end of the full/half-bridge rectification load identification unit;
the second input end of the positive half cycle identification circuit is connected with the second input end of the negative half cycle identification circuit to form a connection point which is the second input end of the full/half-bridge rectification load identification unit;
the output end of the positive half cycle identification circuit and the output end of the negative half cycle identification circuit form the output end of the full/half-bridge rectification load identification unit.
Optionally, the positive half cycle identification circuit includes a third diode, a seventh resistor, an eighth resistor, a ninth resistor, a second capacitor, a second photocoupler, and a tenth resistor;
the positive end of the third diode is the first input end of the positive half cycle identification circuit, the second end of the ninth resistor is the second input end of the positive half cycle identification circuit, and the collector output end of the second photoelectric coupler is the output end of the positive half cycle identification circuit;
a negative end of the third diode is connected to a first end of the seventh resistor, a second end of the seventh resistor is connected to a first end of the eighth resistor and a first end of the ninth resistor, respectively, a second end of the eighth resistor is connected to a first end of the second capacitor and a positive input end of the second photoelectric coupler, respectively, and a second end of the second capacitor is connected to a second end of the ninth resistor and a negative input end of the second photoelectric coupler, respectively;
and the collector output end of the second photoelectric coupler is connected with the first end of the tenth resistor, the second end of the tenth resistor is connected with preset voltage, and the emitter output end of the second photoelectric coupler is grounded.
Optionally, the negative half cycle identification circuit includes a fourth diode, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a third capacitor, a third photocoupler, and a fourteenth resistor;
a negative end of the fourth diode is a first input end of the negative half cycle identification circuit, a second end of the twelfth resistor is a second input end of the negative half cycle identification circuit, and an output end of a collector of the third photoelectric coupler is an output end of the negative half cycle identification circuit;
a positive end of the fourth diode is connected with a first end of the eleventh resistor, and a second end of the eleventh resistor is respectively connected with a first end of the twelfth resistor, a second end of the third capacitor and a negative input end of the third photoelectric coupler;
a second end of the twelfth resistor is connected to a first end of the thirteenth resistor, and a second end of the thirteenth resistor is connected to a first end of the third capacitor and a positive input end of the third photocoupler respectively;
and the collector output end of the third photoelectric coupler is connected with the first end of the fourteenth resistor, the second end of the fourteenth resistor is connected with preset voltage, and the emitter output end of the third photoelectric coupler is grounded.
Optionally, the load identification device further includes a load current measurement unit;
the input end of the load current measuring unit is used for being externally connected with a load to be identified, and the output end of the load current measuring unit is connected with the main controller.
Optionally, the load identification device further comprises a display;
and the display is connected with the main controller and used for displaying the load type identification result of the load to be identified.
In addition, in order to realize the above object, the utility model also provides an intelligent switch, intelligent switch includes foretell load recognition device.
The utility model provides a load recognition device and intelligent switch's beneficial effect lies in:
the utility model discloses in, resistance-capacitance step-down load identification unit is used for detecting whether the load of waiting to discern is resistance-capacitance step-down load, and sends the level signal that detects the formation to main control unit, and main control unit judges whether the load of waiting to discern is resistance-capacitance step-down load according to the level of the level signal of resistance-capacitance step-down load identification unit output; the full/half-bridge rectification load identification unit is used for detecting whether the load to be identified is a full-bridge rectification load or a half-bridge rectification load or not and sending a level signal generated by detection to the main controller, and the main controller judges whether the load to be identified is the full-bridge rectification load or the half-bridge rectification load or not according to the level of the level signal output by the full/half-bridge rectification load identification unit. That is, the utility model provides an identification structure can support the detection of multiple load type.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a load identification device according to an embodiment of the present invention;
fig. 2 is a schematic view of an identification structure of a resistance-capacitance step-down load according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an identification structure of a half-bridge load according to an embodiment of the present invention;
fig. 4 is a schematic diagram of an identification structure of a half-bridge load according to another embodiment of the present invention;
fig. 5 is a schematic view of an identification structure of a full-bridge load according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a load current measuring unit according to an embodiment of the present invention.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a load recognition device according to an embodiment of the present invention, the load recognition device includes:
the main controller 10, the resistance-capacitance step-down load identification unit 20 and the full/half-bridge rectification load identification unit 30.
The input end of the resistance-capacitance voltage reduction load identification unit 10 is used for externally connecting a load to be identified and a mains supply, and the output end of the resistance-capacitance voltage reduction load identification unit 10 is connected with the main controller 10.
The input end of the full/half-bridge rectification load identification unit 20 is used for externally connecting a load to be identified and commercial power, and the output end of the full/half-bridge rectification load identification unit 20 is connected with the main controller 10.
In this embodiment, the rc step-down load identification unit 20 is configured to detect whether the load to be identified is an rc step-down load, and send a level signal generated by the detection to the main controller 10, and the main controller 10 determines whether the load to be identified is an rc step-down load according to a level of the level signal output by the rc step-down load identification unit 20. The full/half-bridge rectification load identification unit 30 is used for detecting whether the load to be identified is a full-bridge rectification load or a half-bridge rectification load, and sending a level signal generated by detection to the main controller 10, and the main controller 10 determines whether the load to be identified is the full-bridge rectification load or the half-bridge rectification load according to the level of the level signal output by the full/half-bridge rectification load identification unit 30.
Optionally, as the utility model provides a load identification device's a specific implementation, resistance-capacitance step-down load identification unit's input includes first input and second input.
The first input end of the resistance-capacitance voltage reduction load identification unit is used for being connected with one end of a load to be identified, and the other end of the load to be identified is connected with a live wire end of a commercial power.
And the second input end of the resistance-capacitance voltage reduction load identification unit is used for being connected with a zero line end of commercial power.
Optionally, please refer to fig. 3, fig. 3 is a schematic diagram of an identification structure of a half-bridge load according to an embodiment of the present invention, wherein a portion of a square frame in fig. 3 is an equivalent schematic diagram of a resistance-capacitance step-down load.
As a specific embodiment of the load recognition device provided by the utility model, the resistance-capacitance step-down load recognition unit includes first diode D24, polarity electric capacity C24, first resistance R54, second diode D22, second resistance R63, third resistance R62, fourth resistance R58, first electric capacity C28, voltage detection chip U6, first photocoupler O9, fifth resistance R60, sixth resistance R61.
The positive terminal of the first diode D24 is the second input terminal of the resistance-capacitance step-down load identification unit, and the negative terminal of the first diode D24 is the first input terminal of the resistance-capacitance step-down load identification unit.
The positive terminal of the first diode D24 is grounded after being commonly connected with the negative terminal of the polarity capacitor C24, the first terminal of the second resistor R63, the first terminal of the first capacitor C28 and the ground terminal of the voltage detection chip U6. The cathode terminal of the first diode D24 is connected to the anode terminal of the second diode D22.
A negative terminal of the second diode D22 is connected to the second terminal of the first resistor R54, and a first terminal of the first resistor R54 is connected to a positive terminal of the polar capacitor C24 and a second terminal of the fourth resistor R58, respectively.
The second end of the second resistor R63 is connected to the second end of the first capacitor C28, the first end of the third resistor R62, and the signal input end of the voltage detection chip U6, and the second end of the third resistor R62 is connected to the first end of the fourth resistor R58. The signal input end of the voltage detection chip U6 is connected with the negative input end of the first photoelectric coupler O9, the positive input end of the first photoelectric coupler O9 is connected with the first end of the fifth resistor R60, and the second end of the fifth resistor R60 is connected with the preset voltage + 3.3V.
The emitter output end of the first photoelectric coupler O9 is grounded, and the collector output end of the first photoelectric coupler O9 is connected to the first end of the sixth resistor R61 and the main controller, respectively.
The second end of the sixth resistor R61 is connected to a preset voltage + 3.3V.
In this embodiment, the rc step-down load identification unit performs load identification based on the voltage doubling principle, and the identification principle thereof can be detailed as (L, N is the mains input end):
if the load to be identified is a resistance-capacitance voltage reduction load, the capacitor C7 in the load to be identified is charged through the diode D24 during the negative half cycle of the commercial power, the 2 pin of the capacitor C7 is the positive electrode, the 1 pin of the capacitor C7 is the negative electrode, and the voltage at the two ends of the capacitor C7 is about 300V. In the positive half cycle of the mains supply, the diode D24 is cut off, the voltage at the position L is positive, the positive voltage is superposed with the voltage at the two ends of the capacitor C7 and is added to the two ends of the D24, and the maximum voltage value is about 600V at the moment, so that voltage doubling is realized. Then, the voltage is divided by series connection of resistors R54, R58, R62 and R63 through a diode D22, and the voltage is collected through a sampling resistor R63. At this time, the voltage detection unit U6 detects that the voltage collected by the R63 is higher than the set value, Vout of the U6 outputs a high level, and the output terminal PA6 of the rc step-down load identification unit is at a high level.
If the load to be identified is not a resistance-capacitance voltage reduction load, the loop is not provided with a C7 capacitor, the maximum value of the voltage at two ends of the D24 is about 300V, the voltage collected by the R63 is detected to be lower than a set value through the voltage detection circuit U6, Vout of the U6 outputs a low level, and the output end PA6 of the resistance-capacitance voltage reduction load identification unit is at the low level.
That is to say, if the output level of the rc step-down load identification unit is a high level, it indicates that the load to be identified is the rc step-down load, and if the output level of the rc step-down load identification unit is a low level, it indicates that the load to be identified is not the rc step-down load.
Optionally, as a specific implementation manner of the load identification apparatus provided by the present invention, the input of the full/half-bridge rectification load identification unit includes a first input terminal and a second input terminal.
The first input end of the full/half-bridge rectification load identification unit is used for being connected with one end of a load to be identified, and the other end of the load to be identified is connected with a live wire end of a mains supply.
And the second input end of the full/half-bridge rectification load identification unit is used for being connected with a zero line end of commercial power.
Optionally, referring to fig. 3 to fig. 5, as a specific implementation of the load identification apparatus provided by the present invention, the full/half-bridge rectification load identification unit includes a positive half-cycle identification circuit and a negative half-cycle identification circuit.
And a connection point formed by connecting the first input end of the positive half cycle identification circuit and the first input end of the negative half cycle identification circuit is the first input end of the full/half-bridge rectification load identification unit.
And a connection point formed by connecting the second input end of the positive half cycle identification circuit and the second input end of the negative half cycle identification circuit is the second input end of the full/half-bridge rectification load identification unit.
The output end of the positive half cycle identification circuit and the output end of the negative half cycle identification circuit form the output end of the full/half-bridge rectification load identification unit.
In the present embodiment, the positive half cycle identification circuit includes a third diode D19, a seventh resistor R36, an eighth resistor R37, a ninth resistor R39, a second capacitor C12, a second photocoupler O7, and a tenth resistor R35.
The positive terminal of the third diode D19 is the first input terminal of the positive half cycle identification circuit, the second terminal of the ninth resistor R39 is the second input terminal of the positive half cycle identification circuit, and the collector output terminal of the second photocoupler O7 is the output terminal of the positive half cycle identification circuit.
A negative electrode end of the third diode D19 is connected to a first end of the seventh resistor R36, a second end of the seventh resistor R36 is connected to a first end of the eighth resistor R37 and a first end of the ninth resistor R39, respectively, a second end of the eighth resistor R37 is connected to a first end of the second capacitor C12 and a positive input end of the second photocoupler O7, and a second end of the second capacitor C12 is connected to a second end of the ninth resistor R39 and a negative input end of the second photocoupler O7, respectively.
The collector output end of the second photoelectric coupler O7 is connected with the first end of the tenth resistor R35, the second end of the tenth resistor R35 is connected with the preset voltage +3.3V, and the emitter output end of the second photoelectric coupler O7 is grounded GND.
In this embodiment, the negative half cycle identification circuit includes a fourth diode D21, an eleventh resistor R45, a twelfth resistor R44, a thirteenth resistor R42, a third capacitor C13, a third photocoupler O8, and a fourteenth resistor R43.
The negative terminal of the fourth diode D21 is the first input terminal of the negative half-cycle identification circuit, the second terminal of the twelfth resistor R44 is the second input terminal of the negative half-cycle identification circuit, and the collector output terminal of the third photocoupler O8 is the output terminal of the negative half-cycle identification circuit.
A positive terminal of the fourth diode D21 is connected to a first terminal of the eleventh resistor R45, and a second terminal of the eleventh resistor R45 is connected to a first terminal of the twelfth resistor R44, a second terminal of the third capacitor C13, and a negative input terminal of the third photocoupler O8, respectively.
A second end of the twelfth resistor R44 is connected to a first end of the thirteenth resistor R42, and a second end of the thirteenth resistor R42 is connected to a first end of the third capacitor C13 and a positive input end of the third photocoupler O8, respectively.
The collector output end of the third photoelectric coupler O8 is connected to the first end of the fourteenth resistor R43, the second end of the fourteenth resistor R43 is connected to the preset voltage +3.3V, and the emitter output end of the third photoelectric coupler O8 is grounded GND.
In this embodiment, please refer to fig. 3 to 5, wherein L, N in fig. 3 to 5 is the commercial power input terminal, R39 and R44 are sampling resistors, O7 and O8 are isolation optocouplers, and C12 and C13 are filter capacitors, so that the acquired signals are stable. Voltage signals collected by the R39 and the R44 are output to the PA4 and the PA5 through the optical couplers O7 and O8, and the PA4 and the PA5 are connected with the main controller. When the load is not connected, the high level is generated at the PA4 and the PA5, so that the load type of the load to be identified can be detected through the level states at the PA4 and the PA 5. In the switching process of the positive and negative half cycles of the mains supply, the voltages at the two ends of the capacitor C12 and the capacitor C13 cannot be suddenly changed, so that the effect of stabilizing the power supply voltage of the optocoupler can be achieved.
Referring to fig. 3, when the load to be identified is a half-wave load including a forward diode, the identification principle corresponding to the full/half-bridge rectification load identification unit is as follows: during the positive half cycle of the commercial power, the current passes through the load to be identified, then passes through D19, R36 and R39 to the N end, at the moment, the sampling resistor R39 collects signals, the signals are output to the PA4 through the optocoupler O7, and at the moment, the PA4 is at a low level. Since the voltage is the positive half cycle of the commercial power, the diode D21 is turned off, no signal is collected on the sampling resistor R44, and the PA5 is at a high level. In the negative half cycle of the commercial power, the diode D3 in the load to be identified is cut off, no current flows through the detection circuit, no signal is collected by the sampling resistors R39 and R44, and the high level is set at the positions of PA4 and PA 5.
That is, when the PA4 output is low and the PA5 output is high, the load to be identified is a half-wave load including a forward diode.
Referring to fig. 4, when the load to be identified is a half-wave load including a negative diode, the identification principle corresponding to the full/half-bridge rectification load identification unit is as follows: during the negative half cycle of the commercial power, the current passes through the load to be identified, then passes through D21, R45 and R44 to the N end, and the signal is collected by the sampling resistor R44 at the moment, and is output to the PA5 through the optocoupler O8, and is output to the main controller through the PA5, and the PA5 is at a low level at the moment. Since the voltage is the negative half cycle of the commercial power, the diode D19 is turned off, and no signal is collected by the sampling resistor R39, and the PA4 is at a high level. In the positive half cycle of the mains supply, the diode D3 in the load is turned off, no current flows through the detection circuit, no signal is collected by the sampling resistors R39 and R44, and both PA4 and PA5 are at high level.
That is, when the PA4 output is high and the PA5 output is low, the load to be identified is a half-wave load including a negative diode.
Referring to fig. 4, when the load to be identified is a full-bridge rectification load, the identification principle corresponding to the full/half-bridge rectification load identification unit is as follows: in the positive half cycle of the commercial power, the current passes through the load to be identified, then passes through D19, R36 and R39 to reach the N end, the signal is collected by the sampling resistor R39 and is output to the PA4 through the optical coupler O7, and at the moment, the PA4 is at a low level. Since the voltage is the positive half cycle of the commercial power, the diode D21 is turned off, no signal is collected on the sampling resistor R44, and the PA5 is at a high level. During the negative half cycle of the commercial power, the current passes through the load to be identified, then passes through the D21, the R45 and the R44 to reach the N end, the signal is collected by the sampling resistor R44 and is output to the PA5 through the optical coupler O8, and at the moment, the PA5 is at a low level. Because the voltage is the negative half cycle of the mains supply, the diode D19 is turned off, no signal is collected on the sampling resistor R39, and the PA4 is at a high level.
That is, if PA4 is low and PA5 is high in the positive half cycle of the utility power, and PA5 is low and PA4 is high in the negative half cycle of the utility power, the load to be identified is a full-bridge rectification load. The full/half-bridge rectification load identification unit can also be used for detecting a load to be identified without a rectifier, and the detection result is the same as that of the full-wave rectification load.
That is, the present embodiment can determine the rectification form of the load to be identified by the unidirectional conductivity of the diode.
In this embodiment, the main controller may be a single chip.
Optionally, please refer to fig. 6, as a specific implementation manner of the load recognition apparatus provided by the present invention, the load recognition apparatus further includes a load current measuring unit.
The input end of the load current measuring unit is used for being externally connected with a load to be identified, and the output end of the load current measuring unit is connected with the main controller.
In the embodiment, the current measurement of the load to be identified can be realized by using the single-phase multifunctional electric energy metering chip U7 and the R70 constantan wire sampling resistor. In fig. 6, L, N is the commercial power incoming end, and R70 is constantan wire sampling resistor, and U7 is single-phase multi-functional electric energy metering chip, and O10 is the isolation opto-coupler, and O10's collecting electrode output end is used for being connected with main control unit, also gives main control unit to output pulse and handles promptly. Wherein the current of the load to be identified can be calculated based on the pulse width and frequency of the output pulse.
In this embodiment, the main controller may make a determination of the power of the load to be identified based on the current of the load to be identified.
Optionally, as a specific implementation manner of the load recognition apparatus provided by the present invention, the load recognition apparatus further includes a display.
The display is connected with the main controller and used for displaying the load type identification result of the load to be identified.
Furthermore, the utility model also provides an intelligence switch, this intelligence switch includes foretell load recognition device.
In this embodiment, the intelligent switch may be a switch type room temperature collecting device or a switch type room temperature controller.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A load recognition device, comprising:
the device comprises a main controller, a resistance-capacitance step-down load identification unit and a full/half-bridge rectification load identification unit;
the input end of the resistance-capacitance voltage reduction load identification unit is used for being externally connected with a load to be identified and a mains supply, and the output end of the resistance-capacitance voltage reduction load identification unit is connected with the main controller;
the input end of the full/half-bridge rectification load identification unit is used for externally connecting a load to be identified and a mains supply, and the output end of the full/half-bridge rectification load identification unit is connected with the main controller.
2. The load identification device of claim 1, wherein the input terminals of the rc buck load identification unit comprise a first input terminal and a second input terminal;
the first input end of the resistance-capacitance voltage reduction load identification unit is used for being connected with one end of the load to be identified, and the other end of the load to be identified is connected with a live wire end of a commercial power;
and the second input end of the resistance-capacitance voltage reduction load identification unit is used for being connected with a zero line end of commercial power.
3. The load identification device of claim 2, wherein the rc step-down load identification unit comprises a first diode, a polar capacitor, a first resistor, a second diode, a second resistor, a third resistor, a fourth resistor, a first capacitor, a voltage detection chip, a first photocoupler, a fifth resistor, and a sixth resistor;
the positive end of the first diode is the second input end of the resistance-capacitance step-down load identification unit, and the negative end of the first diode is the first input end of the resistance-capacitance step-down load identification unit;
the positive end of the first diode is grounded after being connected with the negative end of the polar capacitor, the first end of the second resistor, the first end of the first capacitor and the grounding end of the voltage detection chip in a common mode; the negative end of the first diode is connected with the positive end of the second diode;
the negative end of the second diode is connected with the second end of the first resistor, and the first end of the first resistor is respectively connected with the positive end of the polar capacitor and the second end of the fourth resistor;
a second end of the second resistor is connected with a second end of the first capacitor, a first end of the third resistor and a signal input end of the voltage detection chip respectively, and a second end of the third resistor is connected with a first end of the fourth resistor; the signal input end of the voltage detection chip is connected with the negative input end of the first photoelectric coupler, the positive input end of the first photoelectric coupler is connected with the first end of the fifth resistor, and the second end of the fifth resistor is connected with a preset voltage;
the output end of the emitter of the first photoelectric coupler is grounded, and the output end of the collector of the first photoelectric coupler is respectively connected with the first end of the sixth resistor and the main controller;
and the second end of the sixth resistor is connected with a preset voltage.
4. The load identification device of claim 1, wherein the input terminals of the full/half-bridge rectified load identification unit comprise a first input terminal and a second input terminal;
the first input end of the full/half-bridge rectification load identification unit is used for being connected with one end of the load to be identified, and the other end of the load to be identified is connected with a live wire end of a commercial power;
and the second input end of the full/half-bridge rectification load identification unit is used for being connected with a zero line end of commercial power.
5. The load identification device of claim 4, wherein the full/half-bridge rectified load identification unit comprises a positive half cycle identification circuit and a negative half cycle identification circuit;
the first input end of the positive half cycle identification circuit is connected with the first input end of the negative half cycle identification circuit to form a connection point which is the first input end of the full/half-bridge rectification load identification unit;
the second input end of the positive half cycle identification circuit is connected with the second input end of the negative half cycle identification circuit to form a connection point which is the second input end of the full/half-bridge rectification load identification unit;
the output end of the positive half cycle identification circuit and the output end of the negative half cycle identification circuit form the output end of the full/half-bridge rectification load identification unit.
6. The load identification device of claim 5, wherein the positive half cycle identification circuit comprises a third diode, a seventh resistor, an eighth resistor, a ninth resistor, a second capacitor, a second optocoupler, a tenth resistor;
the positive end of the third diode is the first input end of the positive half cycle identification circuit, the second end of the ninth resistor is the second input end of the positive half cycle identification circuit, and the collector output end of the second photoelectric coupler is the output end of the positive half cycle identification circuit;
a negative end of the third diode is connected to a first end of the seventh resistor, a second end of the seventh resistor is connected to a first end of the eighth resistor and a first end of the ninth resistor, respectively, a second end of the eighth resistor is connected to a first end of the second capacitor and a positive input end of the second photoelectric coupler, respectively, and a second end of the second capacitor is connected to a second end of the ninth resistor and a negative input end of the second photoelectric coupler, respectively;
and the collector output end of the second photoelectric coupler is connected with the first end of the tenth resistor, the second end of the tenth resistor is connected with preset voltage, and the emitter output end of the second photoelectric coupler is grounded.
7. The load identification device of claim 5, wherein the negative half cycle identification circuit comprises a fourth diode, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a third capacitor, a third optocoupler, a fourteenth resistor;
a negative end of the fourth diode is a first input end of the negative half cycle identification circuit, a second end of the twelfth resistor is a second input end of the negative half cycle identification circuit, and an output end of a collector of the third photoelectric coupler is an output end of the negative half cycle identification circuit;
a positive end of the fourth diode is connected with a first end of the eleventh resistor, and a second end of the eleventh resistor is respectively connected with a first end of the twelfth resistor, a second end of the third capacitor and a negative input end of the third photoelectric coupler;
a second end of the twelfth resistor is connected to a first end of the thirteenth resistor, and a second end of the thirteenth resistor is connected to a first end of the third capacitor and a positive input end of the third photocoupler respectively;
and the collector output end of the third photoelectric coupler is connected with the first end of the fourteenth resistor, the second end of the fourteenth resistor is connected with preset voltage, and the emitter output end of the third photoelectric coupler is grounded.
8. The load identifying device of claim 1, further comprising a load current measuring unit;
the input end of the load current measuring unit is used for being externally connected with a load to be identified, and the output end of the load current measuring unit is connected with the main controller.
9. The load identifying device of claim 1, further comprising a display;
and the display is connected with the main controller and used for displaying the load type identification result of the load to be identified.
10. An intelligent switch, characterized in that it comprises a load identification device according to any one of claims 1-9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120007448.1U CN214174525U (en) | 2021-01-04 | 2021-01-04 | Load recognition device and intelligent switch |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120007448.1U CN214174525U (en) | 2021-01-04 | 2021-01-04 | Load recognition device and intelligent switch |
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| CN214174525U true CN214174525U (en) | 2021-09-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115237179A (en) * | 2022-09-22 | 2022-10-25 | 之江实验室 | Intelligent temperature control management circuit based on machine learning |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115237179A (en) * | 2022-09-22 | 2022-10-25 | 之江实验室 | Intelligent temperature control management circuit based on machine learning |
| CN115237179B (en) * | 2022-09-22 | 2023-01-20 | 之江实验室 | Intelligent temperature control management circuit based on machine learning |
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