CN217007448U

CN217007448U - Intelligent lamp power supply access detection circuit and intelligent lamp

Info

Publication number: CN217007448U
Application number: CN202123338096.7U
Authority: CN
Inventors: 梁琚胤; 卢星宇
Original assignee: Midea Intelligent Lighting and Controls Technology Co Ltd
Current assignee: Midea Intelligent Lighting and Controls Technology Co Ltd
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-07-19
Anticipated expiration: 2031-12-28

Abstract

The utility model relates to an intelligence lamps and lanterns power access detection circuitry and intelligent lamps and lanterns, intelligence lamps and lanterns power access detection circuitry includes: the power supply detection circuit comprises a rectifying circuit and a voltage division circuit, wherein a filtering input end of the rectifying circuit is electrically connected with a first node, a filtering output end of the rectifying circuit is electrically connected with a voltage division input end of the voltage division circuit, and a voltage division output end of the voltage division circuit is used as a power supply detection node; the first node is a connection node of a transformation output end of the power transformation circuit and a power input end of the lamp control circuit; the level logic of the output signal of the power detection node is different according to whether the transformation input end of the power transformation circuit is connected with the power signal to be detected. Through this disclosed technical scheme, when having realized the wall switch action seizure, the output winding sharing winding of power access detection circuitry and power vary voltage circuit no longer is encumbrance in the circuit design, has satisfied the demand of intelligent lamps and lanterns power access detection circuitry high performance price ratio and small volume.

Description

Intelligent lamp power supply access detection circuit and intelligent lamp

Technical Field

The utility model relates to the technical field of lamps and lanterns, especially, relate to an intelligence lamps and lanterns power access detection circuit and intelligent lamps and lanterns.

Background

The intelligent driving of intelligent lighting is usually light and color adjustable for intelligent lamps, and can perform lamp-off operation under the condition of no power failure, commonly called as 'soft-off'. Lamps supporting soft turn-off usually have some places which are bad for user experience, and the problems that the lamps flicker when being powered off under the condition of soft turn-off, the lamps need to be powered on again after waiting for a period of time after being powered off, the wall switch cannot be supported for dimming, the success rate of triggering initialization of the wall switch is influenced under some conditions, and the like are solved. The root cause of the foregoing problem is that the inside of the drive cannot sense the moment when the power-off action of the user occurs, resulting in failure to correctly perform the true intention of the user.

In order to solve the above problems, a power access detection circuit needs to be added to the intelligent lamp in the intelligent driving, and when the circuit architecture scheme of the driving is an electrically isolated line, in order to achieve isolation of the power detection circuit, methods such as a photoelectric coupler or a transformer tap are generally used. However, these methods occupy a large internal power supply volume or are costly to implement, which is contrary to the trend of miniaturization and low cost of lamp power supply access detection circuits.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem or at least partially solve the technical problem, the disclosure provides an intelligent lamp power supply access detection circuit and an intelligent lamp, which are not cumbersome in circuit design when the wall switch motion is captured, and meet the requirements of high cost performance and small size of the intelligent lamp power supply access detection circuit.

In a first aspect, the present disclosure provides an intelligent lamp power supply access detection circuit, including:

the power supply detection circuit comprises a rectifying circuit and a voltage division circuit, wherein a filtering input end of the rectifying circuit is electrically connected with a first node, a filtering output end of the rectifying circuit is electrically connected with a voltage division input end of the voltage division circuit, and a voltage division output end of the voltage division circuit is used as a power supply detection node; the first node is a connection node between a transformation output end of the power transformation circuit and a power input end of the lamp control circuit;

the level logic of the output signal of the power supply detection node is different according to whether the transformation input end of the power supply transformation circuit is connected with the power supply signal to be detected.

Simple peripheral circuits such as a rectifying circuit and a voltage division circuit are utilized to replace a photoelectric coupler and a transformer tapping structure in the prior art, whether a power supply signal to be detected is accessed is judged through level logic of a power supply detection node output signal, when the wall switch action is captured, the output winding of the intelligent lamp power supply access detection circuit and the output winding of the power supply transformation circuit share a winding, the circuit design is not redundant, and the requirements of high cost performance and small size of the intelligent lamp power supply access detection circuit are met.

Optionally, the rectifier circuit comprises:

and the anode of the first one-way conduction element is used as the filter input end, and the cathode of the first one-way conduction element is used as the filter output end.

A rectifying circuit is realized by utilizing the first one-way conduction element, and the conversion from an alternating current signal to a direct current signal is realized through the rectifying circuit.

Optionally, the voltage divider circuit includes:

the first end of the first impedance element is used as the voltage division input end, the second end of the first impedance element is electrically connected with the first end of the second impedance element and used as the voltage division output end, and the second end of the second impedance element is grounded.

The voltage of the direct current signal of rectifier circuit rectification back output is still higher for the signal voltage that the controller of intelligent lamps and lanterns can handle, sets up first impedance component and second impedance component as bleeder circuit, can reduce the voltage of power detection node output signal for the signal of telecommunication of bleeder circuit 2 output can be handled by the controller.

Optionally, the intelligent luminaire power access detection circuit further includes:

and the first end of the first capacitor is electrically connected with the filtering output end, and the second end of the first capacitor is grounded.

The first capacitor reduces fluctuation of rectified signals output by the rectifying circuit, smoothes the rectified signals output by the rectifying circuit, and improves working stability of the intelligent lamp power supply access detection circuit.

a third impedance element, a first end of the third impedance element being electrically connected to the first end of the first capacitor, a second end of the third impedance element being grounded.

The third impedance element releases redundant electric energy applied to the first capacitor by the rectifying circuit, so that the voltage on the first capacitor is more stable, and the device is prevented from being damaged due to overhigh voltage on the first capacitor. Meanwhile, the third impedance element can also be used as a load end of the intelligent lamp power supply access detection circuit, and the stability of signals is further improved.

and the first end of the second capacitor is electrically connected with the voltage division output end, and the second end of the second capacitor is grounded.

The high-frequency signal or clutter signal in the signal of telecommunication that bleeder circuit applyed to the second electric capacity is filtered by the second electric capacity, utilizes the second electric capacity to filter the unusual signal in the twinkling of an eye, avoids the controller false detection of intelligent lamps and lanterns, has improved the detection accuracy that detects intelligent lamps and lanterns power and has accessed detection circuitry.

and the processing input end of the signal processing circuit is electrically connected with the voltage division output end, and the voltage division output end of the voltage division circuit and/or the processing output end of the signal processing circuit are/is used as a power supply detection node.

The signal processing circuit can process the electric signal output by the voltage division output end of the voltage division circuit into an electric signal which is easy to observe in waveform or an electric signal which is easy to process by a controller of the intelligent lamp, the controller of the intelligent lamp can conveniently identify the processed electric signal, and then the access information of the power to be detected such as whether the power to be detected is accessed, the access time of the power to be detected, the disconnection time of the power to be detected and the like is judged, so that the control action on the intelligent lamp is generated.

Optionally, the signal processing circuit comprises a waveform conversion circuit and/or a waveform shaping circuit.

In a second aspect, the present disclosure also provides an intelligent lamp including the intelligent lamp power supply access detection circuit according to the first aspect.

Utilize simple peripheral circuits such as rectifier circuit and bleeder circuit to replace optoelectronic coupler and the transformer structure of taking a percentage among the prior art, whether insert the power signal that awaits measuring through the level logic judgement of power detection node output signal, when having realized catching wall switch action, intelligent lamps and lanterns power access detection circuitry and power vary voltage circuit's output winding sharing winding, no longer drag for in the circuit design, satisfied the demand of intelligent lamps and lanterns power access detection circuitry high performance price ratio and small volume.

Optionally, the intelligent luminaire further comprises:

the secondary coil of the power supply transformation circuit corresponds to the transformation output end;

the lamp control circuit is used for controlling the light-emitting parameters of the intelligent lamp.

Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:

the intelligent lamp power supply access detection circuit provided by the embodiment of the disclosure comprises a rectification circuit and a voltage division circuit, wherein a filtering input end of the rectification circuit is electrically connected with a first node, a filtering output end of the rectification circuit is electrically connected with a voltage division input end of the voltage division circuit, and a voltage division output end of the voltage division circuit is used as a power supply detection node; the first node is a connection node of a transformation output end of the power transformation circuit and a power input end of the lamp control circuit; the level logic of the output signal of the power detection node is different according to whether the transformation input end of the power transformation circuit is connected with the power signal to be detected. Through the technical scheme of this disclosure, simple peripheral circuits such as rectifier circuit and bleeder circuit have been replaced optoelectronic coupler and the transformer structure of taking a percentage among the prior art, whether insert the power signal that awaits measuring through the level logic judgement of power detection node output signal, when having realized catching wall switch action, intelligent lamps and lanterns power access detection circuit and power vary voltage circuit's output winding sharing winding, no longer drag on the circuit design, satisfied the demand that intelligent lamps and lanterns power access detection circuit is high price/performance ratio and small volume.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the disclosure.

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of an intelligent lamp power supply access detection circuit provided in an embodiment of the present disclosure;

FIG. 2 is a block diagram of a power access detection circuit for a currently used intelligent lamp;

fig. 3 is a block diagram of a power supply access detection circuit of an intelligent lamp according to an embodiment of the present disclosure;

fig. 4 is a schematic waveform diagram of an output signal of a power detection node according to an embodiment of the disclosure;

fig. 5 is a schematic waveform diagram of another power supply detection node output signal provided in the embodiment of the disclosure.

Detailed Description

In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced otherwise than as described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.

Fig. 1 is a schematic structural diagram of an intelligent lamp power supply access detection circuit provided in an embodiment of the present disclosure. As shown in fig. 1, the intelligent lamp power supply access detection circuit is composed of a rectification circuit 1 and a voltage division circuit 2, a first node N1 is electrically connected with a filter input end a1 of the rectification circuit 1, a voltage division input end B1 of the voltage division circuit 2 is electrically connected with a filter output end a2 of the rectification circuit 1, a power supply detection node is a voltage division output end B2 of the voltage division circuit 2, and a power supply input end F1 of the lamp control circuit 4 is connected with a transformation output end E of the power transformation circuit 3 at the first node N1; according to whether the power signal to be detected is connected to the voltage transformation input end of the power voltage transformation circuit 3, the level logic of the output signal of the power detection node is different, and the voltage transformation input end of the power voltage transformation circuit 3 may be a port, not shown in fig. 1, connected to the left side of the power voltage transformation circuit 3 in fig. 1.

Specifically, the power transforming circuit 3 may exemplarily convert a 220V ac signal into a 42V ac signal, the power transforming circuit 3 may exemplarily be a flyback transformer, the transforming output end E2 of the power transforming circuit 3 is electrically connected to the power input end F1 of the lamp control circuit 4 at a first node N1, fig. 1 exemplarily shows that the transforming output end E2 of the power transforming circuit 3 is electrically connected to the power input end F1 of the lamp control circuit 4 through a rectifying diode D1, that is, the anode of the rectifying diode D1 is electrically connected to the transforming output end E2 of the power transforming circuit 3, the cathode of the rectifying diode D1 is electrically connected to the power input end F1 of the lamp control circuit 4, the rectifying diode D1 is used for rectifying the ac signal output by the power transforming circuit 3 into a dc signal and then inputting the dc signal into the lamp control circuit 4 to control the lighting state of the lamp, and the electrical connection point of the transforming output end E2 of the power transforming circuit 3 and the anode of the rectifying diode D1 may be set as the first node Node N1. It should be noted that the rectifying electronic device is not limited to the rectifying diode, and other rectifying electronic devices may be selected according to the actual circuit design, which is not limited in the embodiment of the present disclosure.

The transformation output end E2 of the power transformation circuit 3 is electrically connected to the filter input end a1 of the rectification circuit 1, and the electrical connection node is a first node N1, and the rectification circuit 1 can exemplarily rectify a 220V ac signal output by the power transformation circuit 3 into a 42V dc signal. Since the 42V dc signal is still higher than the controller of the intelligent lighting fixture, for example, the controller of the intelligent lighting fixture may be a Microprocessor (MCU), and the 42V dc signal is still higher than the signal voltage that can be processed by the microprocessor, so the voltage dividing input terminal B1 of the voltage dividing circuit 2 is electrically connected to the filter output terminal a2 of the rectifying circuit 1, the rectifying circuit 1 inputs the 42V dc signal into the voltage dividing circuit 2, the voltage dividing output terminal B2 of the voltage dividing circuit 2 is electrically connected to the controller of the intelligent lighting fixture, the voltage dividing circuit 2 divides the 42V dc signal, and the signal that can be processed by the controller of the intelligent lighting fixture is output through the voltage dividing output terminal B2, for example, the signal that can be processed by the controller of the intelligent lighting fixture output through the voltage dividing output terminal B2 may be a 2.6V voltage signal.

The electric signal of power vary voltage circuit 3 output handles through rectifier circuit 1 and bleeder circuit 2, and the controller electricity that exports to intelligent lamps and lanterns via bleeder circuit 2's partial pressure output B2 is connected, and the controller of intelligent lamps and lanterns detects whether access of power vary voltage circuit 3 is awaited measuring the power. Specifically, it may be configured that when the power transforming circuit 3 is connected to the power source to be tested, the power detecting node outputs a high level signal to the controller, and when the power transforming circuit 3 is not connected to the power source to be tested, the power detecting node outputs a low level signal to the controller. Or, when the power transforming circuit 3 is connected to the power source to be tested, the power detecting node outputs a low level signal to the controller, and when the power transforming circuit 3 is not connected to the power source to be tested, the power detecting node outputs a high level signal to the controller.

According to the technical scheme of the embodiment of the disclosure, according to whether a power supply signal to be detected is connected to a voltage transformation input end of a power supply voltage transformation circuit 3 or not, level logics of output signals of power supply detection nodes are different, and a controller can judge whether the power supply to be detected is connected to the power supply voltage transformation circuit 3 or not, time for the power supply to be detected to be connected to the power supply voltage transformation circuit 3, and time for the power supply to be detected not to be connected to the power supply voltage transformation circuit 3, and other access information of the power supply to be detected, so that control actions on the intelligent lamp are generated. In addition, the connection and disconnection of the power supply to be tested can be controlled by a remote controller or a wall switch or other wireless communication modes, which is not limited in the embodiment of the disclosure.

The intelligent lamp is used as an intelligent device which is frequently used, and due to the characteristics of the installation position of the intelligent lamp, a user is difficult to substantially control the intelligent lamp, only interactive control can be performed through a wall switch or a terminal, the action of capturing the wall switch is particularly important, and therefore a power supply access detection circuit needs to be added to the intelligent lamp. Fig. 2 is a block diagram of a power supply access detection circuit of an intelligent lamp currently used. As shown in fig. 2, the isolation transformer 202 may be utilized to convert a 220V AC signal input by the AC-DC isolation controller 201 into a 42V AC signal and output the 42V AC signal to the dimming and color-adjusting circuit 203, where the dimming and color-adjusting circuit 203 correspondingly controls the lighting parameters of the lamp 207. An input power detection circuit 204 and a photoelectric coupler 205 are added below the dimming and toning circuit 203, the input power detection circuit 204 judges whether a power supply to be detected is connected, the power supply to be detected is illustratively 220V alternating current, a light emitting part in the photoelectric coupler 205 emits light when the 220V alternating current is connected, the light emitting part in the photoelectric coupler 205 does not emit light when the 220V alternating current is not connected, the level logics of output signals of the corresponding photoelectric couplers 205 are different, and the processor 206 controls the dimming and toning circuit 203 to have different logics according to the output signals of the photoelectric coupler 205. However, the photocoupler 205 is added in the circuit, and the photocoupler 205 occupies a larger internal volume of the power supply and is higher in cost. In addition, the detection of the power supply to be detected can be realized by adopting a transformer tapping method, and the method needs to perform line drawing on the secondary side of the power supply transformation circuit 3, so that the circuit design process is complicated, the circuit cost is increased, and the requirements of miniaturization and high cost performance of a lamp control device are not met.

Fig. 3 is a block diagram of a power supply access detection circuit of an intelligent lamp according to an embodiment of the present disclosure. Compared with the structure block diagram shown in fig. 2, with reference to fig. 1 and 3, the embodiment of the present disclosure replaces a photocoupler 205 or a transformer tap structure in the prior art with simple peripheral circuits 305 such as a rectification circuit and a voltage division circuit, and the working principle of the rest of the modules can be similar to that of fig. 2. Meanwhile, the embodiment of the disclosure judges whether to access a power signal to be detected through level logic of the output signal of the power detection node, realizes capturing the action of the wall switch, can ensure that the wall switch reliably triggers network initialization, improves distribution network success rate, supports wall switch dimming and color mixing control, can immediately electrify and light up after power failure in a soft light-off state, and the like, and improves user experience of the intelligent lamp in a distribution network process and a use process, and can judge whether a secondary circuit of the lamp works and whether the lamp works normally except for monitoring whether the power to be detected is accessed in real time.

Alternatively, as shown in fig. 1, the first unidirectional conducting element D2 may be arranged to constitute the rectifier circuit 1, and for example, the first unidirectional conducting element D2 may be a diode, the filter input terminal a1 is an anode of the first unidirectional conducting element D2, and the filter output terminal a2 is a cathode of the first unidirectional conducting element D2.

Specifically, as shown in fig. 1, the anode of the first unidirectional conducting element D2 is electrically connected to the transformation output terminal E2 of the power transformation circuit 3 through the first node N1, and the first unidirectional conducting element D2 rectifies the ac signal output by the transformation output terminal E2 of the power transformation circuit 3 into a dc signal, and outputs the dc signal to the voltage divider circuit 2 through the cathode of the first unidirectional conducting element D2. According to the technical scheme of the embodiment of the disclosure, the rectification circuit 1 is utilized to realize the conversion from the alternating current signal to the direct current signal. It should be noted that, the first unidirectional conducting element D2 may select a suitable electronic device according to circuit requirements, which is not limited in the embodiment of the present disclosure.

Alternatively, as shown in fig. 1, the first impedance element R1 and the second impedance element R2 may be configured to form a voltage divider circuit 2, the voltage divider input end B1 is the first end G1 of the first impedance element R1, the voltage divider output end B2 is an electrical connection node between the first end G3 of the second impedance element R2 and the second end G2 of the first impedance element R1, and the second end G4 of the second impedance element R2 is grounded. Specifically, since the voltage of the dc signal output after being rectified by the rectifying circuit 1 is still higher than the signal voltage that can be processed by the controller of the smart lamp, the first impedance element R1 and the second impedance element R2 are provided as the voltage dividing circuit 2 to reduce the voltage of the output signal of the power supply detection node.

As shown in fig. 1, the filter output terminal a2 of the rectifier circuit 1 is electrically connected to the first terminal G1 of the first impedance element R1, the rectifier circuit 1 inputs a dc signal to the first terminal G1 of the first impedance element R1, the voltage of the dc signal may be 42V as an example, after the voltage divider circuit 2 divides the voltage by the first impedance element R1 and the second impedance element R2, the voltage of the output signal of the power supply detection node may be 2.6V as an example, which is greatly reduced compared to the voltage of the dc signal input by the rectifier circuit 1, so that the electrical signal output by the voltage divider circuit 2 can be processed by the controller.

Optionally, as shown in fig. 1, the intelligent luminaire power access detection circuit may further include a first capacitor C2, the filter output terminal a2 is electrically connected to the first terminal H1 of the first capacitor C2, and the second terminal H2 of the first capacitor C2 is grounded.

Specifically, when the rectified signal output by the rectifying circuit 1 is a pulse voltage signal, the intelligent lamp power access detection circuit may further include a first capacitor C2, the rectifying circuit 1 applies a dc pulse voltage signal to the first capacitor C2, and the dc pulse voltage signal is filtered by the first capacitor C2 to form a stable voltage signal and output the stable voltage signal to the voltage dividing circuit 2. It should be noted that the setting of the first capacitor C2 may also be adapted according to the control logic of the signal processing circuit and the control logic of the intelligent luminaire controller.

Optionally, as shown in fig. 1, the smart luminaire power access detection circuit may further include a third impedance element R3, the first end H1 of the first capacitor C2 is electrically connected to the first end I1 of the third impedance element R3, and the second end I2 of the third impedance element R3 is grounded.

Specifically, as shown in fig. 1, the third impedance element R3 may be provided as a discharge resistance of the first capacitor C2. Specifically, when the voltage applied to the first capacitor C2 is too high, the third impedance element R3 discharges the redundant power applied to the first capacitor C2 by the rectifier circuit 1, so that the voltage on the first capacitor C2 is more stable, and the device is prevented from being damaged due to the too high voltage on the first capacitor C2. Meanwhile, the third impedance element R3 can also be used as a load end of the intelligent lamp power supply access detection circuit, so that the stability of the signal is further improved. It should be noted that, the resistance of the third impedance element R3 may be set according to the discharge requirement of the first capacitor C2, which is not limited in the embodiment of the disclosure.

Optionally, as shown in fig. 1, the intelligent luminaire power access detection circuit may further include a second capacitor C1, the voltage division output terminal B2 is electrically connected to the first terminal H3 of the second capacitor C1, and the second terminal H4 of the second capacitor C1 is grounded.

Specifically, abnormal electrical signals such as high-frequency signals or clutter signals may exist in the electrical signals output by the voltage division circuit 2, and if the abnormal electrical signals are output to a subsequent circuit, the detection of the subsequent circuit is interfered, so that the detection accuracy of the intelligent lamp power supply access detection circuit is influenced. This disclosed embodiment sets up and makes bleeder circuit 2 apply to the high frequency signal or the clutter signal in the signal of telecommunication of second electric capacity C1 by second electric capacity C1 filtration through second electric capacity C1, utilizes second electric capacity C1 to filter the unusual signal in the twinkling of an eye, avoids the controller false detection of intelligent lamps and lanterns, has improved the detection accuracy that detects intelligent lamps and lanterns power access detection circuit. In addition, whether the second capacitor C1 is added to the circuit may be determined according to whether the electrical signal generated by the secondary coil in the power transformer circuit 3 is stable.

Optionally, as shown in fig. 1, the intelligent luminaire power access detection circuit may further include a signal processing circuit 5, the voltage dividing output terminal B2 is electrically connected to the processing input terminal JI of the signal processing circuit 5, the power detection node may be the processing output terminal J2 of the signal processing circuit 5, or the voltage dividing output terminal B2 of the voltage dividing circuit 2, or both the processing output terminal J2 of the signal processing circuit 5 and the voltage dividing output terminal B2 of the voltage dividing circuit 2 may be used as the power detection nodes.

Specifically, referring to the above embodiment, the voltage dividing output end B2 of the voltage dividing circuit 2 can be directly used as a power supply detection node, and the voltage dividing circuit 2 outputs an electrical signal with different levels to the intelligent lamp controller at the power supply detection node according to whether the voltage transforming input end of the power supply voltage transforming circuit 3 is connected to the power supply to be detected.

When the waveform of the electric signal output by the voltage-dividing output end B2 of the voltage-dividing circuit 2 is not obvious in difference or the output signal waveform is not beneficial to the processing of the controller of the intelligent lamp, it can also be set that the voltage-dividing output end B2 is electrically connected with the processing input end J1 of the signal processing circuit 5, the voltage-dividing circuit 2 outputs the electric signal output by the voltage-dividing output end B2 to the signal processing circuit 5, the signal processing circuit 5 processes the signal and then outputs the processed signal to the controller of the intelligent lamp, at this moment, the power supply detection node is the processing output end J2 of the signal processing circuit 5. The signal processing circuit 5 can process the electrical signal output by the voltage dividing output end B2 of the voltage dividing circuit 2 into an electrical signal which is easy to observe in waveform or an electrical signal which is easy to process by a controller of the intelligent lamp, so that the controller of the intelligent lamp can identify the processed electrical signal, and further judge whether the power supply to be tested is connected, the connection time of the power supply to be tested, the disconnection time of the power supply to be tested and other connection information of the power supply to be tested, and thus, control actions on the intelligent lamp are generated.

Or, the processing output terminal J2 of the signal processing circuit 5 and the voltage dividing output terminal B2 of the voltage dividing circuit 2 may be both used as power supply detection nodes, and the controller of the intelligent lamp determines, by analyzing specific waveforms of the two received signals and combining specific functions of the signal processing circuit 5, whether the power supply to be detected is connected, and the connection time and disconnection time of the power supply to be detected, and the like, of the power supply to be detected, thereby generating a control action for the intelligent lamp.

Alternatively, the signal processing circuit 5 may include a waveform conversion circuit and a waveform shaping circuit, and it is also possible to provide that the signal processing circuit 5 includes only the waveform conversion circuit, or that the signal processing circuit 5 includes only the waveform shaping circuit.

Specifically, when the electrical signal output by the voltage dividing output terminal B2 of the voltage dividing circuit 2 is not beneficial to the processing of the controller of the intelligent lighting fixture, the signal processing circuit 5 may include a waveform converting circuit, which converts the electrical signal output by the voltage dividing output terminal B2 of the voltage dividing circuit 2 into an electrical signal convenient for the controller to process, and for example, may convert the irregularity signal into a square wave signal or a sine wave signal. When the interference noise exists in the electrical signal output by the voltage dividing output terminal B2 of the voltage dividing circuit 2 and is not beneficial to the processing of the controller, the waveform shaping circuit may shape the interference noise into a waveform meeting the requirements of the controller, for example, a non-rectangular square wave pulse signal may be shaped into a square wave pulse signal meeting the requirements, or a sine wave signal with interference may be shaped into a sine wave signal without interference. The waveform converting circuit and the waveform shaping circuit convert or shape the electrical signal output by the voltage dividing output terminal B2 of the voltage dividing circuit 2 according to the waveform requirement of the controller, which is not limited in the embodiment of the present disclosure.

Fig. 4 is a schematic waveform diagram of an output signal of a power supply detection node according to an embodiment of the disclosure. As shown in fig. 4, when the transforming input terminal of the power transforming circuit 3 is connected to the power to be tested, the output signal of the power detecting node may be set to correspond to the high level period of the square wave pulse signal shown in fig. 4; when the transformation input end of the power transformation circuit 3 is not connected with the power to be detected, the output signal of the power detection node corresponds to the low level time period of the square wave pulse signal shown in fig. 4.

Fig. 5 is a schematic waveform diagram of another power supply detection node output signal according to an embodiment of the disclosure. As shown in fig. 5, when the transforming input terminal of the power transforming circuit 3 is connected to the power to be tested, the output signal of the power detecting node may correspond to the sawtooth-shaped pulse signal period in fig. 5; when the transformation input end of the power transformation circuit 3 is not connected with a power supply to be tested, the output signal of the power detection node corresponds to the low level time period in the graph 5.

It should be noted that, in the embodiment of the present disclosure, the waveform of the output signal of the power supply detection node is not limited to the square wave pulse signal and the sawtooth wave pulse signal, as long as there is a difference between corresponding waveforms when the power supply to be detected is switched on and off.

Through the technical scheme, simple peripheral circuits such as a rectifying circuit and a voltage division circuit are utilized to replace a photoelectric coupler and a transformer tapping structure in the prior art, whether a power supply signal to be detected is accessed is judged through level logic of a power supply detection node output signal, and then when the wall switch action is captured, the intelligent lamp power supply access detection circuit and an output winding of a power supply transformation circuit share a winding, the circuit design is not redundant, and the requirements of high cost performance and small size of the intelligent lamp power supply access detection circuit are met.

The embodiment of the present disclosure further provides an intelligent lamp, which includes the power supply access detection circuit of the intelligent lamp according to the above embodiment, and therefore the intelligent lamp provided by the embodiment of the present disclosure has the beneficial effects described in the above embodiment, and details are not repeated here. Exemplarily, the intelligent lamp may be an indoor desk lamp or a wall lamp, or an in-vehicle lamp or an outdoor lamp, and the like, which is not limited in the embodiment of the present disclosure.

Optionally, as shown in fig. 1, the intelligent lamp may further include a lamp control circuit 4 and a power transformer circuit 3, the primary coil T1 and the secondary coil T2 form the power transformer circuit 3, the transformer output end E2 is arranged corresponding to the secondary coil T2, and the lighting parameters of the intelligent lamp are controlled by the lamp control circuit 4.

Specifically, as shown in fig. 1, when a power supply to be tested is connected, the transformation output end E2 of the power transformation circuit 3 can output 220V ac power input by the power supply to be tested as 42V ac power, and when the power supply to be tested is not connected, the primary winding T1 has no output, and at the same time, the power transformation circuit 3 can convert electric energy into magnetic energy. The intelligent lamp can further comprise a lamp control circuit 4, a power input end F1 of the lamp control circuit 4 of the intelligent lamp is electrically connected with a transformation output end E2 of the power transformation circuit 3, the lamp control circuit 4 is connected with the intelligent lamp, the lamp control circuit 4 can control light-emitting parameters of the intelligent lamp, and the light-emitting parameters of the intelligent lamp can be parameters of luminous flux, color temperature, illuminance, light-emitting angle, temperature rise and the like of the lamp.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing are merely exemplary embodiments of the present disclosure, which enable those skilled in the art to understand or practice the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An intelligent lamp power supply access detection circuit, comprising:

2. The intelligent lamp power access detection circuit of claim 1, wherein the rectifier circuit comprises:

3. The intelligent light fixture power access detection circuit of claim 1, wherein the voltage divider circuit comprises:

4. The intelligent light fixture power access detection circuit of claim 1, further comprising:

and a first end of the first capacitor is electrically connected with the filtering output end, and a second end of the first capacitor is grounded.

5. The intelligent light fixture power access detection circuit of claim 4, further comprising:

and a first end of the third impedance element is electrically connected with the first end of the first capacitor, and a second end of the third impedance element is grounded.

6. The intelligent light fixture power access detection circuit of claim 1, further comprising:

7. The intelligent light fixture power access detection circuit of claim 1, further comprising:

8. The intelligent light fixture power access detection circuit of claim 7, wherein the signal processing circuit comprises a waveform conversion circuit and/or a waveform shaping circuit.

9. An intelligent lamp comprising the intelligent lamp power access detection circuit of any one of claims 1-8.

10. The smart light fixture of claim 9 further comprising: