Control device and method

Abstract

The invention provides a control device and method. The device comprises a waveform control module used for being electrically connected with a live wire input end and a load control module which is electrically connected with the waveform control module and used for being electrically connected with an electric load. The waveform control module is used for responding to a received waveform control instruction, performing waveform control on an alternating current signal input by the live wire input end according to the waveform control instruction, and outputting a target signal to the load control module, and the target signal comprises a half-wave signal or a full-wave signal; and the load control module is used for carrying out waveform detection on the target signal to obtain a detection result that the target signal is a half-wave signal or a full-wave signal, and controlling the electric load according to the detection result. According to the invention, control requirements capable of being stably identified can be transmitted to the load control module based on the difference between half waves and full waves, the requirements for load compatibility and electromagnetic compatibility are low, the requirements for modulation, detection and synchronization are low, the method can be applied to most of conditions, and the applicability is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of electrical control technology, and more specifically to a control device and method. Background Technology

[0002] In existing residential buildings and renovation projects, wall switch panels typically only have a live wire input and lack a neutral wire. To achieve intelligent control of electrical loads, current technologies usually employ phase-coded modulation (PCM) schemes. Based on a switch panel connected in series with a single live wire input, the mains waveform is phase-coded by manual operation, thereby transmitting control requests to downstream modules. These downstream modules then control the electrical loads accordingly based on the identified waveform.

[0003] Existing phase-coded modulation schemes have high requirements for load compatibility and electromagnetic compatibility, as well as high requirements for modulation, detection, and synchronization. They can only produce distinguishable signal characteristics under ideal conditions (such as weak noise interference and stable load changes), resulting in poor applicability of the scheme. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the present invention provides a control device and method.

[0005] In one aspect, the present invention provides a control device, comprising: The waveform control module has its first terminal for electrical connection to the live wire input terminal; The load control module has its first terminal electrically connected to the second terminal of the waveform control module, and the second terminal is used to be electrically connected to the electrical load. The waveform control module is used to respond to the received waveform control command, control the waveform of the AC signal input to the live wire input terminal according to the waveform control command, and output the target signal to the load control module. The target signal includes a half-wave signal or a full-wave signal. The load control module is used to detect the waveform of the target signal, obtain the detection result of whether the target signal is a half-wave signal or a full-wave signal, and control the electrical load according to the detection result.

[0006] In one embodiment, the waveform control module includes a unidirectional conduction unit and a switching unit, and the waveform control instructions include switching control instructions; The first end of the unidirectional conduction unit is electrically connected to the first end of the switching unit and is used to electrically connect to the live wire input terminal. The second end of the unidirectional conduction unit is electrically connected to the second end of the switching unit and the load control module, respectively. The switching unit is used to respond to switching control commands and control its own switching state according to the switching control commands; Based on the switching state of the switching unit, the AC signal is output as a full-wave signal to the load control module through the switching unit or as a half-wave signal to the load control module through the unidirectional conduction unit.

[0007] In one embodiment, the unidirectional conduction unit includes a first unidirectional conduction device and a second unidirectional conduction device, the switching unit includes a first switching device and a second switching device, and the switching control command includes a first switching control command and a second switching control command. The input terminal of the first unidirectional conducting device is electrically connected to the first contact of the first switching device and is used to electrically connect to the live wire input terminal. The output terminal of the first unidirectional conducting device is electrically connected to the second contact of the first switching device, the output terminal of the second unidirectional conducting device, and the second contact of the second switching device. The third contact of the first switching device is electrically connected to the third contact of the second switching device. The input terminal of the second unidirectional conducting device is electrically connected to the first contact of the second switching device and the load control module. The first switching device is configured to respond to a first switching control command and control its first contact to connect with its second contact or its first contact to connect with its third contact, according to the first switching control command; the second switching device is configured to respond to a second switching control command and control its first contact to connect with its second contact or its first contact to connect with its third contact, according to the second switching control command.

[0008] In one embodiment, the first unidirectional conducting device includes a first diode, and the second unidirectional conducting device includes a second diode; The anode of the first diode is electrically connected to the first contact of the first switching device and is used for electrical connection to the live wire input terminal. The cathode of the first diode is electrically connected to the second contact of the first switching device, the cathode of the second diode, and the second contact of the second switching device. The anode of the second diode is electrically connected to the first contact of the second switching device and the load control module.

[0009] In one embodiment, the first unidirectional conducting device includes a first fully controlled switch, the second unidirectional conducting device includes a second diode, and the waveform control command further includes a first modulation control command. The input terminal of the first fully controlled switch is electrically connected to the first contact of the first switching device and is used to electrically connect to the live wire input terminal. The output terminal of the first fully controlled switch is electrically connected to the second contact of the first switching device, the cathode of the second diode, and the second contact of the second switching device, respectively. The anode of the second diode is electrically connected to the first contact of the second switching device and the load control module, respectively. The control electrode of the first fully controlled switch is used to connect to the first drive signal corresponding to the first modulation control command.

[0010] In one embodiment, the first unidirectional conducting device includes a first diode, the second unidirectional conducting device includes a second fully controlled switch, and the waveform control command further includes a second modulation control command. The anode of the first diode is electrically connected to the first contact of the first switching device and is used to electrically connect to the live wire input terminal. The cathode of the first diode is electrically connected to the second contact of the first switching device, the output terminal of the second fully controlled switch, and the second contact of the second switching device. The input terminal of the second fully controlled switch is electrically connected to the first contact of the second switching device and the load control module. The control electrode of the second fully controlled switch is used to connect to the second drive signal corresponding to the second modulation control command.

[0011] In one embodiment, the first unidirectional conducting device includes a first fully controlled switch, the second unidirectional conducting device includes a second fully controlled switch, and the waveform control command further includes a first modulation control command and a second modulation control command. The input terminal of the first fully controlled switch is electrically connected to the first contact of the first switching device and is used for electrical connection to the live wire input terminal. The output terminal of the first fully controlled switch is electrically connected to the second contact of the first switching device, the output terminal of the second fully controlled switch, and the second contact of the second switching device. The input terminal of the second fully controlled switch is electrically connected to the first contact of the second switching device and the load control module. The control electrode of the first fully controlled switch is used to connect to the first drive signal corresponding to the first modulation control command, and the control electrode of the second fully controlled switch is used to connect to the second drive signal corresponding to the second modulation control command.

[0012] Secondly, in one embodiment, the present invention provides a control method applied to a control device in any of the above embodiments; the control method includes the following steps performed by a load control module: The target signal is subjected to waveform detection to determine whether it is a half-wave or full-wave signal, and the electrical load is controlled based on the detection result.

[0013] In one embodiment, waveform detection is performed on the target signal to determine whether it is a half-wave or full-wave signal, and the electrical load is controlled based on the detection result, including: Waveform detection is performed on the target signal to determine the root mean square value and / or total harmonic distortion rate of the target signal; The type detection result of the target signal is obtained based on the root mean square value and / or total harmonic distortion rate of the target signal; the type detection result indicates whether the target signal is a full-wave signal or a half-wave signal. The electrical load is controlled according to the control strategy corresponding to the type detection result.

[0014] In one embodiment, the control method is specifically applied to the control device in one of the above embodiments; the type detection result specifically characterizes the target signal as a full-wave signal, a positive half-wave signal, or a negative half-wave signal.

[0015] In one embodiment, the control method is specifically applied to the control device in one of the above embodiments; performing waveform detection on the target signal to obtain a detection result of whether the target signal is a half-wave signal or a full-wave signal, and controlling the electrical load according to the detection result, including: Waveform detection is performed on the target signal to determine the root mean square value and / or total harmonic distortion rate of the target signal; Based on the root mean square value and / or total harmonic distortion of the target signal, the type detection result and duty cycle modulation detection result of the target signal are obtained; the type detection result indicates whether the target signal is a full-wave signal, a positive half-wave signal, or a negative half-wave signal, and the duty cycle modulation detection result indicates the duty cycle modulation parameter of the target signal; The electrical load is controlled according to the control strategy corresponding to the type detection result and the duty cycle modulation detection result.

[0016] In one embodiment, the control method is specifically applied to the control device in one of the above embodiments; performing waveform detection on the target signal to obtain a detection result of whether the target signal is a half-wave signal or a full-wave signal, and controlling the electrical load according to the detection result, including: The target signal is subjected to waveform detection to determine the first signal parameter and the second signal parameter of the target signal; the first signal parameter includes the root mean square value and / or the total harmonic distortion rate, and the second signal parameter includes the total harmonic distortion rate and / or the harmonic energy distribution. Based on the first signal parameter, the target signal type detection result and duty cycle modulation detection result are obtained; the type detection result indicates whether the target signal is a full-wave signal, a positive half-wave signal, or a negative half-wave signal, and the duty cycle modulation detection result indicates the duty cycle modulation parameter of the target signal; Based on the second signal parameters, the frequency modulation detection result of the target signal is obtained; the frequency modulation detection result characterizes the frequency modulation parameters of the target signal. The electrical load is controlled according to the control strategies corresponding to the type detection results, duty cycle modulation detection results, and frequency modulation detection results.

[0017] Through the aforementioned control device and method, under the premise of single-wire control, a waveform control module and a load control module are configured respectively. The waveform control module can respond to the user's waveform control commands to control the waveform of the AC signal input at the live wire input terminal and output the corresponding target signal to the load control module. The load control module can perform waveform detection on the target signal and obtain the detection result indicating whether the target signal is a half-wave signal or a full-wave signal. Ultimately, the load control module controls the electrical load according to the control strategy corresponding to the half-wave signal or the control strategy corresponding to the full-wave signal. This invention can transmit stably identifiable control requirements to the load control module based on the difference between half-wave and full-wave signals. It has low requirements for load compatibility and electromagnetic compatibility, and low requirements for modulation, detection, and synchronization, making it applicable in most cases and greatly improving its applicability. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the control device in one embodiment of the present invention; Figure 2 This is a schematic diagram of the specific structure of a waveform control module in one embodiment of the present invention; Figure 3 This is a schematic diagram of a waveform control module using two diodes and two switching devices in one embodiment of the present invention; Figure 4 This is a schematic diagram of a waveform control module using a fully controlled switch, a diode, and two switching devices in one embodiment of the present invention; Figure 5 This is a schematic diagram of a waveform control module using a fully controlled switch, a diode, and two switching devices in another embodiment of the present invention; Figure 6 This is a schematic diagram of a waveform control module using two fully controlled switching transistors and two switching devices in another embodiment of the present invention; Figure 7a This is a schematic diagram of a structure for realizing positive half-wave signal output based on diodes in one embodiment of the present invention; Figure 7b This is a waveform diagram illustrating the positive half-wave signal output based on a diode in one embodiment of the present invention. Figure 8a This is a schematic diagram of a structure for realizing positive half-wave signal output based on a fully controlled switching transistor in one embodiment of the present invention; Figure 8b This is a waveform diagram illustrating the positive half-wave signal output based on a fully controlled switching transistor in one embodiment of the present invention. Figure 9a This is a schematic diagram of a structure for outputting a negative half-wave signal based on a fully controlled switching transistor in one embodiment of the present invention; Figure 9b This is a waveform diagram illustrating the negative half-wave signal output based on a fully controlled switching transistor in one embodiment of the present invention. Figure 10 This is a waveform diagram illustrating the output of a positive half-wave signal at a first frequency based on a fully controlled switching transistor in one embodiment of the present invention. Figure 11 This is a waveform diagram illustrating the output of a positive half-wave signal at a second frequency based on a fully controlled switching transistor in one embodiment of the present invention. Figure 12 This is a flowchart illustrating the configuration method executed by the interactive device in one embodiment of the present invention; Figure 13 This is a flowchart illustrating the control method executed by the load control module in one embodiment of the present invention. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified. In this application, the term "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to implement and use the invention. In the following description, details are set forth for purposes of explanation. It should be understood that those skilled in the art will recognize that the invention can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the invention with unnecessary detail. Therefore, the invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed herein.

[0022] Firstly, such as Figure 1 As shown, in one embodiment, the present invention provides a control device, which includes a waveform control module and a load control module.

[0023] The first terminal of the waveform control module is electrically connected to the live wire input terminal L_IN. The second terminal of the waveform control module is electrically connected to the first terminal of the load control module. The second terminal of the load control module is electrically connected to the electrical load.

[0024] The second terminal of the electrical load is also electrically connected to the live wire output terminal L_OUT. The third terminals of the load control module and the electrical load are also electrically connected to the neutral wire input terminal N_IN and the neutral wire output terminal N_OUT, respectively. The live wire input terminal L_IN returns to the neutral wire input terminal N_IN after passing through the waveform control module and the load control module, forming a power supply loop. This allows the waveform control module and the load control module to operate based on this power supply loop. Similarly, the load control module returns to the neutral wire input terminal N_IN after passing through the electrical load, forming a power supply loop. This allows the electrical load to operate based on this power supply loop.

[0025] The waveform control module is used to respond to the received waveform control command, control the AC signal input at the live wire input terminal L_IN according to the waveform control command, and output the target signal to the load control module. The target signal includes a half-wave signal or a full-wave signal.

[0026] The waveform control module is controlled by the user. The user can directly control the waveform control module or indirectly control it through the corresponding interactive device, thereby transmitting the corresponding waveform control commands to the waveform control module. Based on the waveform control module's response to the waveform control commands, the waveform control module performs waveform control on the AC signal input at the live wire input terminal L_IN.

[0027] Specifically, in this embodiment, the waveform control module can be used only to control the output type of the AC signal, that is, to directly output the AC signal to obtain the target signal in the form of a full-wave signal, or to rectify the AC signal to obtain the target signal in the form of a half-wave signal. It is understood that regardless of whether the target signal is a full-wave or half-wave signal, it can provide normal power to the electrical load. The waveform control module achieves the corresponding control purpose by responding to waveform control commands. Therefore, in this embodiment, the waveform control commands can have only two states, thereby allowing the waveform control module to control itself in either a first operating state or a second operating state. The first operating state is used to directly output the AC signal, and the second operating state is used to rectify the AC signal for output.

[0028] The load control module is used to detect the waveform of the target signal, obtain the detection result of whether the target signal is a half-wave signal or a full-wave signal, and control the electrical load according to the detection result.

[0029] The waveform control module can output a target signal in either full-wave or half-wave form to the load control module. Since the difference between full-wave and half-wave signals is significant and less susceptible to noise interference, the load control module can reliably identify the type of target signal, thus obtaining a detection result indicating that the target signal is either a half-wave or a full-wave signal. Because the two target signals correspond to different control strategies, the load control module can control the electrical load according to the corresponding control strategy. For example, in this embodiment, if the electrical load is a lamp, the load control module can control the lamp to turn off when a half-wave signal is detected, or control the lamp to turn on when a full-wave signal is detected.

[0030] Through the aforementioned control device, under the premise of single-wire control, a waveform control module and a load control module are configured respectively. The waveform control module can respond to the user's waveform control commands to control the waveform of the AC signal input at the live wire input terminal and output the corresponding target signal to the load control module. The load control module can perform waveform detection on the target signal and obtain the detection result indicating whether the target signal is a half-wave signal or a full-wave signal. Ultimately, the load control module controls the electrical load according to the control strategy corresponding to the half-wave signal or the control strategy corresponding to the full-wave signal. This invention can transmit stably identifiable control requirements to the load control module based on the difference between half-wave and full-wave signals. It has low requirements for load compatibility and electromagnetic compatibility, and low requirements for modulation, detection, and synchronization, making it applicable in most cases and greatly improving its applicability.

[0031] like Figure 2 As shown, in one embodiment, the waveform control module includes a unidirectional conduction unit and a switching unit, and the waveform control instructions include switching control instructions.

[0032] The first end of the unidirectional conduction unit is electrically connected to the first end of the switching unit and is used to electrically connect to the live wire input terminal L_IN. The second end of the unidirectional conduction unit is electrically connected to the second end of the switching unit and the load control module, respectively.

[0033] The unidirectional conduction unit may include one or more unidirectional conduction devices, and the switching unit may include one or more switching devices.

[0034] The switching unit is used to respond to switching control commands and control its own switching state according to the switching control commands.

[0035] When a switching unit includes only one switching device, the switching state of the switching unit is either on or off. When a switching unit includes multiple switching devices, the switching state of the switching unit is more varied, and is obtained by combining the switching states of multiple switching devices.

[0036] Based on the switching state of the switching unit, the AC signal is output as a full-wave signal to the load control module through the switching unit or as a half-wave signal to the load control module through the unidirectional conduction unit.

[0037] Taking a unidirectional conduction unit including one unidirectional conduction device and a switching unit including one switching device as an example, when the switching device is open, the AC signal is transmitted to the next stage through the unidirectional conduction device. Under the action of the unidirectional conduction device, a target signal in the form of a half-wave signal is output to the load control module (which can be a positive half-wave signal or a negative half-wave signal, depending on the conduction direction of the unidirectional conduction device between the live wire input terminal L_IN and the load control module). Similarly, when the switching device is on, the unidirectional conduction unit can be regarded as a short circuit, and the AC signal is transmitted to the next stage through the switching device, outputting a target signal in the form of a full-wave signal to the load control module.

[0038] In one embodiment, the unidirectional conduction unit includes a first unidirectional conduction device and a second unidirectional conduction device, such as... Figure 3 As shown, the first unidirectional conducting device includes a first diode D1, the second unidirectional conducting device includes a second diode D2, the switching unit includes a first switching device SW1 and a second switching device SW2, and the switching control command includes a first switching control command and a second switching control command.

[0039] The input terminal of the first unidirectional conducting device (such as the anode of the first diode D1) is electrically connected to the first contact of the first switching device SW1 and is used to electrically connect to the live wire input terminal L_IN. The output terminal of the first unidirectional conducting device (such as the cathode of the first diode D1) is electrically connected to the second contact of the first switching device SW1, the output terminal of the second unidirectional conducting device (such as the cathode of the second diode D2), and the second contact of the second switching device SW2, respectively. The third contact of the first switching device SW1 is electrically connected to the third contact of the second switching device SW2. The input terminal of the second unidirectional conducting device (such as the anode of the second diode D2) is electrically connected to the first contact of the second switching device SW2 and the load control module, respectively.

[0040] The first switching device SW1 is used to respond to the first switching control command and control its first contact to connect with its second contact or its first contact to connect with its third contact, according to the first switching control command; the second switching device SW2 is used to respond to the second switching control command and control its first contact to connect with its second contact or its first contact to connect with its third contact, according to the second switching control command.

[0041] The first switching device SW1 and the second switching device SW2 can be either mechanical switches or electronic switches. When they are mechanical switches, user actions such as pressing, rotating, or toggling can serve as corresponding switch control commands, depending on the switch type. When they are electronic switches, users can control the switching devices through a corresponding interactive device. In this case, the user's input to the interactive device serves as the corresponding switch control command, and the interactive device can control the switching devices accordingly after receiving the input. If the interactive device is a touchscreen, the input is touch information.

[0042] The first switching device SW1 can control its first contact to connect with its second contact or its third contact. When its first contact is connected with its second contact, it can be considered that the first switching device SW1 is in a conducting state; when its first contact is connected with its third contact, it can be considered that the first switching device SW1 is in a disconnected state. Similarly, the second switching device SW2 can control its first contact to connect with its second contact or its third contact. When its first contact is connected with its second contact, it can be considered that the second switching device SW2 is in a conducting state; when its first contact is connected with its third contact, it can be considered that the second switching device SW2 is in a disconnected state.

[0043] Specifically, since this embodiment has two switching devices, the switching unit has the following four switching states: When the first switching device SW1 is in the ON state and the second switching device SW2 is in the ON state, the AC signal input at the live wire input terminal L_IN is directly transmitted to the next stage through the first switching device SW1 and the second switching device SW2, enabling the load control module to access the target signal in the form of a full-wave signal.

[0044] When the first switching device SW1 is in the off state and the second switching device SW2 is in the off state, the AC signal input at the live wire input terminal L_IN is directly transmitted to the next stage through the first switching device SW1 and the second switching device SW2, so that the load control module can access the target signal in the form of a full-wave signal.

[0045] When the first switching device SW1 is in the off state and the second switching device SW2 is in the on state, the positive half-wave signal in the AC signal input at the live wire input terminal L_IN is transmitted to the next stage through the first diode D1 and the second switching device SW2, so that the load control module can access the target signal in the form of a positive half-wave signal.

[0046] When the first switching device SW1 is in the on state and the second switching device SW2 is in the off state, the negative half-wave signal in the AC signal input at the live wire input terminal L_IN is transmitted to the next stage through the first switching device SW1 and the second diode D2, so that the load control module can access the target signal in the form of a negative half-wave signal.

[0047] As mentioned in the above embodiments, full-wave and half-wave signals can be output based on a single unidirectional conducting device and a single switching device. The half-wave signal is fixed as either a positive or negative half-wave signal, limiting the load control module to only two control strategies. In this embodiment, two unidirectional conducting devices and two switching devices are used, allowing for the construction of more loops and enabling the output of full-wave, positive, and negative half-wave signals to the load control module, thus enriching the control strategies for the electrical load.

[0048] As a supplement, the first and second unidirectional conducting devices can also be other semi-controlled devices besides diodes.

[0049] like Figure 4 As shown, in one embodiment, the first unidirectional conducting device includes a first fully controlled switch S1, the second unidirectional conducting device includes a second diode D2, and the waveform control command further includes a first modulation control command.

[0050] The input terminal of the first fully controlled switch S1 is electrically connected to the first contact of the first switching device SW1 and is used to electrically connect to the live wire input terminal L_IN. The output terminal of the first fully controlled switch S1 is electrically connected to the second contact of the first switching device SW1, the cathode of the second diode D2, and the second contact of the second switching device SW2. The anode of the second diode D2 is electrically connected to the first contact of the second switching device SW2 and the load control module.

[0051] The control electrode of the first fully controlled switch S1 is used to connect to the first drive signal corresponding to the first modulation control command.

[0052] Among them, the first fully controlled switch S1 can be controlled by PWM.

[0053] Specifically, since this embodiment has two switching devices, the switching unit has the following four switching states: When the first switching device SW1 is in the ON state and the second switching device SW2 is in the ON state, the AC signal input at the live wire input terminal L_IN is directly transmitted to the next stage through the first switching device SW1 and the second switching device SW2, enabling the load control module to access the target signal in the form of a full-wave signal.

[0054] When the first switching device SW1 is in the off state and the second switching device SW2 is in the off state, the AC signal input at the live wire input terminal L_IN is directly transmitted to the next stage through the first switching device SW1 and the second switching device SW2, so that the load control module can access the target signal in the form of a full-wave signal.

[0055] When the first switching device SW1 is in the off state and the second switching device SW2 is in the on state, the positive half-wave signal in the AC signal input at the live wire input terminal L_IN is transmitted to the next stage through the first fully controlled switch S1 and the second switching device SW2. Under the control of the first drive signal, the first fully controlled switch S1 modulates the positive half-wave signal accordingly, so that the load control module can access the positive half-wave signal form and include the target signal modulated by the positive half-wave signal.

[0056] When the first switching device SW1 is in the on state and the second switching device SW2 is in the off state, the negative half-wave signal in the AC signal input at the live wire input terminal L_IN is transmitted to the next stage through the first switching device SW1 and the second diode D2, so that the load control module can access the target signal in the form of a negative half-wave signal.

[0057] It can be seen that under the action of the first fully controlled switch S1, the output target signal can achieve modulation difference based on the difference between the types of full-wave signal, positive half-wave signal and negative half-wave signal, which can further enrich the control strategy, so that the load control module can not only identify full-wave signal, positive half-wave signal or negative half-wave signal, but also further identify positive half-wave signal modulation.

[0058] like Figure 5 As shown, in one embodiment, the first unidirectional conducting device includes a first diode D1, the second unidirectional conducting device includes a second fully controlled switch S2, and the waveform control command further includes a second modulation control command.

[0059] The anode of the first diode D1 is electrically connected to the first contact of the first switching device SW1 and is used to connect to the live wire input terminal L_IN. The cathode of the first diode D1 is electrically connected to the second contact of the first switching device SW1, the output of the second fully controlled switch S2, and the second contact of the second switching device SW2. The input of the second fully controlled switch S2 is electrically connected to the first contact of the second switching device SW2 and the load control module.

[0060] The control electrode of the second fully controlled switch S2 is used to connect to the second drive signal corresponding to the second modulation control command.

[0061] Similar to the first fully controlled switch S1 in the above embodiment, under the action of the second fully controlled switch S2, the output target signal can also achieve modulation differences based on the differences in the types of full-wave signal, positive half-wave signal and negative half-wave signal, which can further enrich the control strategy, so that the load control module can not only identify full-wave signal, positive half-wave signal or negative half-wave signal, but also further identify negative half-wave signal modulation.

[0062] like Figure 6 As shown, in one embodiment, the first unidirectional conducting device includes a first fully controlled switch S1, the second unidirectional conducting device includes a second fully controlled switch S2, and the waveform control command further includes a first modulation control command and a second modulation control command.

[0063] The input terminal of the first fully controlled switch S1 is electrically connected to the first contact of the first switching device SW1 and is used to electrically connect to the live wire input terminal L_IN. The output terminal of the first fully controlled switch S1 is electrically connected to the second contact of the first switching device SW1, the output terminal of the second fully controlled switch S2, and the second contact of the second switching device SW2. The input terminal of the second fully controlled switch S2 is electrically connected to the first contact of the second switching device SW2 and the load control module.

[0064] The control electrode of the first fully controlled switch S1 is used to connect to the first drive signal corresponding to the first modulation control command, and the control electrode of the second fully controlled switch S2 is used to connect to the second drive signal corresponding to the second modulation control command.

[0065] Similar to the first fully controlled switch S1 or the second fully controlled switch S2 in the above embodiments, this embodiment simultaneously sets the first fully controlled switch S1 and the second fully controlled switch S2. Under the action of the first fully controlled switch S1 and the second fully controlled switch S2, the output target signal can also achieve modulation differences based on the type differences of full-wave signal, positive half-wave signal and negative half-wave signal. Ultimately, it can further enrich the control strategy, so that the load control module can not only identify full-wave signal, positive half-wave signal or negative half-wave signal, but also further identify positive half-wave signal modulation and negative half-wave signal modulation.

[0066] The fully controlled switching transistor in the above embodiments can be any one of MOSFET, IGBT, JFET, SiC MOSFET, and GaN.

[0067] In one embodiment, if the waveform control module and the load control module do not draw power directly from the live wire input terminal, the control device may further include a self-powered module that is electrically connected to the live wire input terminal, the waveform control module, and the load control module respectively, thereby providing power to the waveform control module and the load control module.

[0068] In one embodiment, the control device may further include a surge / EMI suppression module connected in series with the live wire input, which may specifically include a varistor, a capacitive-resistive absorption unit, a common-mode inductor, a Y capacitor, etc., to improve surge and EMC performance.

[0069] Secondly, in one embodiment, the present invention provides a control method, referring to... Figure 1 The control method is applied to the control device in any of the above embodiments; the control method includes the following steps executed by the load control module: The target signal is subjected to waveform detection to obtain the detection result of whether the target signal is a half-wave signal or a full-wave signal, and the electrical load is controlled according to the detection result.

[0070] The control device using the above control method, under the premise of single-wire control, is configured with a waveform control module and a load control module. The waveform control module can respond to the user's waveform control commands to control the AC signal input to the live wire and output the corresponding target signal to the load control module. The load control module can detect the waveform of the target signal and obtain the detection result indicating whether the target signal is a half-wave signal or a full-wave signal. Ultimately, the load control module controls the electrical load according to the control strategy corresponding to the half-wave signal or the full-wave signal. This invention can transmit stably identifiable control requirements to the load control module based on the difference between half-wave and full-wave signals. It has low requirements for load compatibility and electromagnetic compatibility, and low requirements for modulation, detection, and synchronization, making it applicable in most cases and greatly improving its applicability.

[0071] In one embodiment, waveform detection is performed on the target signal to determine whether it is a half-wave or full-wave signal, and the electrical load is controlled based on the detection result, including: The target signal is subjected to waveform detection to determine the root mean square (RMS) and / or total harmonic distortion (THD) of the target signal.

[0072] The root mean square (RMS) is the value obtained by squaring, averaging, and taking the square root of the signal, and it measures the effective value of the signal. The total harmonic distortion (THD) is the ratio of the total harmonics in a signal to the fundamental frequency component, and it measures the signal's deviation.

[0073] Specifically, the total harmonic distortion (THD) can be achieved by performing harmonic analysis on the signal, such as using FFT or Goertzel.

[0074] The type detection result of the target signal is obtained based on the root mean square value and / or total harmonic distortion rate of the target signal; the type detection result indicates whether the target signal is a full-wave signal or a half-wave signal.

[0075] The root mean square (RMS) value can be either the full-cycle RMS value V_rms. Without considering other differences, the full-cycle RMS value V_rms of the target signal in full-wave form is greater than that in half-wave form, thus the type of the target signal can be determined based on the full-cycle RMS value V_rms. Alternatively, the RMS value can be a half-cycle RMS value, such as the positive half-cycle RMS value Vp_rms and the negative half-cycle RMS value Vn_rms. The full-wave form target signal possesses both the positive and negative half-cycle RMS values ​​Vp_rms, while the half-wave form target signal possesses only one of the positive and negative half-cycle RMS values ​​Vp_rms. Therefore, the type of the target signal can be determined based on either the positive or negative half-cycle RMS value Vp_rms.

[0076] Without considering other differences, the total harmonic distortion (THD) of the target signal in half-wave form is significantly higher than that of the target signal in full-wave form due to the chopping process. Therefore, the type of target signal can be determined based on the total harmonic distortion (THD).

[0077] It is understandable that the type of the target signal can be detected by using the root mean square (RMS) value alone, the total harmonic distortion (THD) value alone, or both the RMS value and the THD value simultaneously, ultimately yielding the target signal type detection result.

[0078] The electrical load is controlled according to the control strategy corresponding to the type detection result.

[0079] Specifically, based on a preset mapping table, if the type detection result indicates that the target signal is a full-wave signal, the control strategy corresponding to the full-wave signal in the mapping table is used to control the electrical load; if the type detection result indicates that the target signal is a half-wave signal, the control strategy corresponding to the half-wave signal in the mapping table is used to control the electrical load.

[0080] In one embodiment, the control method is specifically applied to the control device in one of the above embodiments, referring to... Figure 3 The type detection result specifically represents the target signal as a full-wave signal, a positive half-wave signal, or a negative half-wave signal.

[0081] Among them, when specifically applied to Figure 3The control device shown employs two unidirectional conducting devices and two switching devices, thus enabling it to output a target signal in the form of a full-wave signal, a positive half-wave signal, or a negative half-wave signal to the load control module. This allows the load control module to obtain a detection result indicating whether the target signal is a full-wave signal, a positive half-wave signal, or a negative half-wave signal.

[0082] like Figure 7a As shown, at this time, the first switching device SW1 is open and the second switching device SW2 is open, allowing the positive half-wave signal in the AC signal to be transmitted to the next stage. The input voltage, root mean square (RMS) value, and total harmonic distortion (THD) of the target signal connected to the load control module are as follows: Figure 7b As shown.

[0083] Understandably, the target signals corresponding to other switch combinations are similar, so the type of the target signal can be detected by at least one of the root mean square (RMS) and total harmonic distortion (THD).

[0084] In one embodiment, the control method is specifically applied to the control device in one of the above embodiments, referring to... Figure 6 The target signal undergoes waveform detection to determine whether it is a half-wave or full-wave signal. Based on the detection result, the electrical load is controlled, including: The target signal is subjected to waveform detection to determine the root mean square (RMS) and / or total harmonic distortion (THD) of the target signal.

[0085] Based on the root mean square (RMS) and / or total harmonic distortion (THD) of the target signal, the type detection result and duty cycle modulation detection result of the target signal are obtained. The type detection result indicates whether the target signal is a full-wave signal, a positive half-wave signal, or a negative half-wave signal, and the duty cycle modulation detection result indicates the duty cycle modulation parameter of the target signal.

[0086] When a fully controlled switch is used, in addition to selecting the type of target signal through the first switching device SW1 and the second switching device SW2, parameter modulation of the target signal can also be achieved by driving and modulating the fully controlled switch. In this embodiment, the fully controlled switch can be driven and controlled using PWM, allowing the user to control the duty cycle of the fully controlled switch by providing corresponding modulation control commands to achieve duty cycle modulation.

[0087] Without considering other differences, the root mean square (RMS) value of the target signal modulated and output based on a larger duty cycle is greater than that of the target signal modulated and output based on a smaller duty cycle. Therefore, the duty cycle modulation parameter of the target signal can be determined based on the RMS value.

[0088] Without considering other differences, modulation based on a larger duty cycle produces fewer harmonics, while modulation based on a smaller duty cycle produces more harmonics. This results in the total harmonic distortion (THD) of the target signal corresponding to a larger duty cycle being less than that corresponding to a smaller duty cycle. Therefore, the duty cycle modulation parameter of the target signal can be determined based on the total harmonic distortion (THD).

[0089] It is understandable that the root mean square (RMS) value can be used alone to detect the duty cycle modulation parameter of the target signal, or the total harmonic distortion (THD) value can be used alone to detect the duty cycle modulation parameter of the target signal, or both the RMS value and the THD value can be used simultaneously to detect the duty cycle modulation parameter of the target signal, and finally the duty cycle modulation detection result of the target signal can be obtained.

[0090] The electrical load is controlled according to the control strategy corresponding to the type detection result and the duty cycle modulation detection result.

[0091] Specifically, based solely on the duty cycle modulation detection results and a preset duty cycle threshold table, if the duty cycle modulation parameter representing the target signal in the duty cycle modulation detection results is the first target duty cycle, then the control strategy corresponding to the first target duty cycle in the duty cycle threshold table is used to control the electrical load; if the duty cycle modulation parameter representing the target signal in the duty cycle detection results is the second target duty cycle, then the control strategy corresponding to the second target duty cycle in the duty cycle threshold table is used to control the electrical load.

[0092] like Figure 8a As shown, at this time, the first switching device SW1 is open and the second switching device SW2 is open, allowing the positive half-wave signal in the AC signal to be transmitted to the next stage. At this time, the first fully controlled switch S1 modulates the positive half-wave signal based on the corresponding duty cycle modulation parameters. The input voltage, root mean square (RMS) value, and total harmonic distortion (THD) of the target signal connected to the load control module are as follows: Figure 8b As shown, different duty cycle modulation parameters correspond to different input voltages, root mean square (RMS) values ​​of the input voltages, and total harmonic distortion (THD).

[0093] like Figure 9a As shown, at this time, the first switching device SW1 is turned on and the second switching device SW2 is turned off, allowing the negative half-wave signal in the AC signal to be transmitted to the next stage. Meanwhile, the second fully controlled switch S2 modulates the negative half-wave signal based on the corresponding duty cycle modulation parameters. The input voltage, root mean square (RMS) value, and total harmonic distortion (THD) of the target signal connected to the load control module are as follows: Figure 9bAs shown, different duty cycle modulation parameters correspond to different input voltages, root mean square (RMS) values ​​of the input voltages, and total harmonic distortion (THD).

[0094] Specifically, in this embodiment, both the type detection result and the duty cycle modulation detection result are obtained simultaneously. Therefore, the first target relationship table, which combines the above mapping table and the duty cycle threshold table, is used to select the control strategy.

[0095] In one embodiment, the control method is specifically applied to the control device in one of the above embodiments, referring to... Figure 6 The target signal undergoes waveform detection to determine whether it is a half-wave or full-wave signal. Based on the detection result, the electrical load is controlled, including: Waveform detection is performed on the target signal to determine the first signal parameter and the second signal parameter of the target signal; the first signal parameter includes the root mean square value (RMS) and / or the total harmonic distortion (THD), and the second signal parameter includes the total harmonic distortion (THD) and / or the harmonic energy distribution (E_h).

[0096] Among them, the harmonic energy distribution E_h represents the proportion of energy contributed by each harmonic in the total energy of the signal, and can measure the frequency composition of the signal.

[0097] Based on the first signal parameter, the target signal type detection result and duty cycle modulation detection result are obtained; the type detection result indicates whether the target signal is a full-wave signal, a positive half-wave signal, or a negative half-wave signal, and the duty cycle modulation detection result indicates the duty cycle modulation parameter of the target signal.

[0098] The relevant content of the type detection results and duty cycle modulation detection results can be referred to in the above embodiments, and will not be repeated here.

[0099] Based on the second signal parameters, the frequency modulation detection result of the target signal is obtained; the frequency modulation detection result characterizes the frequency modulation parameters of the target signal.

[0100] In this embodiment, the fully controlled switching transistor can be driven and controlled using PWM, allowing the user to control the frequency of the fully controlled switching transistor by providing corresponding modulation control commands to achieve frequency modulation.

[0101] Without considering other differences, the total harmonic distortion (THD) of the target signal modulated and output at different frequencies is different, so the frequency modulation parameters of the target signal can be determined based on the total harmonic distortion (THD).

[0102] Without considering other differences, the harmonic energy distribution E_h of the target signal modulated and output at different frequencies is different, so the frequency modulation parameters of the target signal can be determined based on the harmonic energy distribution E_h.

[0103] It is understandable that the total harmonic distortion (THD) can be used alone to detect the frequency modulation parameters of the target signal, or the harmonic energy distribution (E_h) can be used alone to detect the frequency modulation parameters of the target signal, or the total harmonic distortion (THD) and harmonic energy distribution (E_h) can be used simultaneously to detect the frequency modulation parameters of the target signal, and finally the frequency modulation detection result of the target signal can be obtained.

[0104] The electrical load is controlled according to the control strategies corresponding to the type detection results, duty cycle modulation detection results, and frequency modulation detection results.

[0105] Specifically, based solely on the frequency modulation detection results and a preset frequency threshold table, if the frequency modulation parameter representing the target signal in the frequency modulation detection results is the first target frequency, then the control strategy corresponding to the first target frequency in the frequency threshold table is used to control the electrical load; if the frequency modulation parameter representing the target signal in the frequency detection results is the second target duty cycle, then the control strategy corresponding to the second target frequency in the frequency threshold table is used to control the electrical load.

[0106] like Figure 8a As shown, at this time, the first switching device SW1 is open and the second switching device SW2 is open, allowing the positive half-wave signal in the AC signal to be transmitted to the next stage. At this time, the first fully controlled switch S1 modulates the positive half-wave signal's duty cycle based on the corresponding frequency modulation parameters (e.g., 1kHz). The input voltage, root mean square (RMS) value, and total harmonic distortion (THD) of the target signal connected to the load control module are as follows: Figure 10 As shown.

[0107] like Figure 8a As shown, at this time, the first switching device SW1 is open and the second switching device SW2 is open, allowing the positive half-wave signal in the AC signal to be transmitted to the next stage. At this time, the first fully controlled switch S1 modulates the positive half-wave signal's duty cycle based on the corresponding frequency modulation parameters (e.g., 0.1kHz). The input voltage, root mean square (RMS) value, and total harmonic distortion (THD) of the target signal connected to the load control module are as follows: Figure 11 As shown.

[0108] It can be seen that different frequency modulation parameters correspond to different input voltages and total harmonic distortion (THD).

[0109] Specifically, in this embodiment, the type detection result, duty cycle modulation detection result, and frequency modulation detection result are obtained simultaneously. Therefore, the control strategy selection needs to be achieved by integrating the above mapping table, duty cycle threshold table, and frequency threshold table into a second target relationship table.

[0110] In one embodiment, the user controls the waveform control module via an interactive device, referring to... Figure 6 ,based on Figure 6 The present invention provides a configuration method for the control device shown; as follows: Figure 12 As shown, the configuration method includes the following steps performed by the interactive device: S101: Read the current states of SW1 and SW2 to obtain the combined state {00,01,10,11}.

[0111] S102: Mapping to output mode based on combination state: Mode 0 (corresponding to full-wave signal) / Mode P (corresponding to positive half-wave signal) / Mode N (corresponding to negative half-wave signal).

[0112] S103: If it is mode 0, then the PWM output is turned off or all control devices are set to normally on / bypass state; the output is a full-wave unmodulated voltage.

[0113] S104: If it is mode P, then configure the PWM parameters (frequency f_pwm, duty cycle d, synchronization strategy, etc.) of the positive half-cycle branch, so that S1 is turned on and off according to the PWM parameters; at the same time, keep the negative half-cycle branch as the reference conduction.

[0114] S105: If it is mode N, configure the PWM parameters of the negative half-cycle branch so that S2 is turned on and off according to the PWM parameters; at the same time, keep the positive half-cycle branch as the reference conduction.

[0115] S106: Update PWM parameters (e.g., multiple duty cycles, multiple frequencies) according to load type or user adjustment instructions.

[0116] S107: Performs zero-crossing synchronization (ZCD synchronization) or soft start, dead time, and fault protection (over-temperature / over-current / surge) on PWM.

[0117] S108: Execute S101-S107 in a loop.

[0118] In one embodiment, refer to Figure 6 ,based on Figure 6 The present invention provides a control method for the control device shown; as follows: Figure 13 As shown, the control method includes the following steps performed by the load control module: S201: Sample the voltage of L_OUT relative to N to obtain one or more full-cycle data windows at the power frequency.

[0119] S202: Calculate the full-cycle RMS value V_rms; and optionally calculate the positive half-cycle RMS value Vp_rms and the negative half-cycle RMS value Vn_rms.

[0120] S203: Perform harmonic analysis on the sampled voltage (e.g., FFT, Goertzel, etc.) to calculate the total harmonic distortion rate (THD), or calculate the harmonic energy distribution E_h of a specified frequency band (around f_pwm and its harmonics).

[0121] S204: Compare {V_rms,THD,(Vp_rms,Vn_rms),E_h} with the preset threshold / feature template library to identify the current mode (mode 0 / mode P / mode N) and the corresponding gear (duty cycle gear, frequency gear or function channel).

[0122] S205: Based on the recognition results, query the command table and generate load control commands (on / off, brightness level, speed level, scene mode, etc.).

[0123] S206: Executes load control commands and can record / report status.

[0124] S207: If the identification is uncertain or exceeds the fault tolerance threshold, the fault tolerance strategy is activated: extend the sampling window, recalculate, roll back to safe mode, or maintain the original state. S201-S207 are executed repeatedly.

[0125] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the detailed descriptions of other embodiments above, which will not be repeated here.

[0126] The control device and method provided by the present invention have been described in detail above. Specific examples have been used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

[0127] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A control device, characterized in that, include: The waveform control module has its first terminal for electrical connection to the live wire input terminal; A load control module, the first end of which is electrically connected to the second end of the waveform control module, the second end of which is used to be electrically connected to the electrical load; The waveform control module is used to respond to the received waveform control command, perform waveform control on the AC signal input to the live wire input terminal according to the waveform control command, and output a target signal to the load control module. The target signal includes a half-wave signal or a full-wave signal. The load control module is used to perform waveform detection on the target signal, obtain the detection result of whether the target signal is a half-wave signal or a full-wave signal, and control the electrical load according to the detection result.

2. The control device according to claim 1, characterized in that, The waveform control module includes a unidirectional conduction unit and a switching unit, and the waveform control command includes a switching control command. The first end of the unidirectional conduction unit is electrically connected to the first end of the switch unit and is used to electrically connect to the live wire input terminal. The second end of the unidirectional conduction unit is electrically connected to the second end of the switch unit and the load control module, respectively. The switching unit is used to respond to the switching control command and control its own switching state according to the switching control command; Based on the switching state of the switching unit, the AC signal is output to the load control module as a full-wave signal via the switching unit or as a half-wave signal via the unidirectional conduction unit.

3. The control device according to claim 2, characterized in that, The unidirectional conduction unit includes a first unidirectional conduction device and a second unidirectional conduction device; the switching unit includes a first switching device and a second switching device; and the switching control command includes a first switching control command and a second switching control command. The input terminal of the first unidirectional conducting device is electrically connected to the first contact of the first switching device and is used to electrically connect to the live wire input terminal. The output terminal of the first unidirectional conducting device is electrically connected to the second contact of the first switching device, the output terminal of the second unidirectional conducting device, and the second contact of the second switching device. The third contact of the first switching device is electrically connected to the third contact of the second switching device. The input terminal of the second unidirectional conducting device is electrically connected to the first contact of the second switching device and the load control module. The first switching device is configured to respond to the first switching control command and control its first contact to connect with its second contact or its first contact to connect with its third contact, according to the first switching control command; the second switching device is configured to respond to the second switching control command and control its first contact to connect with its second contact or its first contact to connect with its third contact, according to the second switching control command.

4. The control device according to claim 3, characterized in that, The first unidirectional conducting device includes a first diode, and the second unidirectional conducting device includes a second diode; The anode of the first diode is electrically connected to the first contact of the first switching device and is used to electrically connect to the live wire input terminal. The cathode of the first diode is electrically connected to the second contact of the first switching device, the cathode of the second diode, and the second contact of the second switching device. The anode of the second diode is electrically connected to the first contact of the second switching device and the load control module.

5. The control device according to claim 3, characterized in that, The first unidirectional conducting device includes a first fully controlled switching transistor, the second unidirectional conducting device includes a second diode, and the waveform control command further includes a first modulation control command; The input terminal of the first fully controlled switch is electrically connected to the first contact of the first switching device and is used to electrically connect to the live wire input terminal. The output terminal of the first fully controlled switch is electrically connected to the second contact of the first switching device, the cathode of the second diode, and the second contact of the second switching device. The anode of the second diode is electrically connected to the first contact of the second switching device and the load control module. The control electrode of the first fully controlled switch is used to connect to the first drive signal corresponding to the first modulation control command.

6. The control device according to claim 3, characterized in that, The first unidirectional conducting device includes a first diode, the second unidirectional conducting device includes a second fully controlled switch, and the waveform control command further includes a second modulation control command; The anode of the first diode is electrically connected to the first contact of the first switching device and is used to electrically connect to the live wire input terminal. The cathode of the first diode is electrically connected to the second contact of the first switching device, the output terminal of the second fully controlled switch, and the second contact of the second switching device. The input terminal of the second fully controlled switch is electrically connected to the first contact of the second switching device and the load control module. The control electrode of the second fully controlled switch is used to connect to the second drive signal corresponding to the second modulation control command.

7. The control device according to claim 3, characterized in that, The first unidirectional conducting device includes a first fully controlled switch, the second unidirectional conducting device includes a second fully controlled switch, and the waveform control command further includes a first modulation control command and a second modulation control command; The input terminal of the first fully controlled switch is electrically connected to the first contact of the first switching device and is used to electrically connect to the live wire input terminal. The output terminal of the first fully controlled switch is electrically connected to the second contact of the first switching device, the output terminal of the second fully controlled switch, and the second contact of the second switching device. The input terminal of the second fully controlled switch is electrically connected to the first contact of the second switching device and the load control module. The control electrode of the first fully controlled switch is used to connect to the first drive signal corresponding to the first modulation control command, and the control electrode of the second fully controlled switch is used to connect to the second drive signal corresponding to the second modulation control command.

8. A control method, characterized in that, The control method is applied to the control device according to any one of claims 1 to 7; the control method includes the following steps performed by the load control module: The target signal is subjected to waveform detection to obtain the detection result of whether the target signal is a half-wave signal or a full-wave signal, and the electrical load is controlled according to the detection result.

9. The control method according to claim 8, characterized in that, The step of performing waveform detection on the target signal to obtain a detection result indicating whether the target signal is a half-wave or full-wave signal, and controlling the electrical load based on the detection result, includes: The target signal is subjected to waveform detection to determine the root mean square value and / or total harmonic distortion rate of the target signal; The type detection result of the target signal is obtained based on the root mean square value and / or total harmonic distortion rate of the target signal; the type detection result indicates whether the target signal is a full-wave signal or a half-wave signal. The electrical load is controlled according to the control strategy corresponding to the detection result of the type.

10. The control method according to claim 9, characterized in that, The control method is specifically applied to the control device described in claim 3; the type detection result specifically indicates that the target signal is a full-wave signal, a positive half-wave signal, or a negative half-wave signal.

11. The control method according to claim 8, characterized in that, The control method is specifically applied to the control device according to any one of claims 5 to 7; the step of performing waveform detection on the target signal to obtain a detection result of whether the target signal is a half-wave signal or a full-wave signal, and controlling the electrical load according to the detection result, includes: The target signal is subjected to waveform detection to determine the root mean square value and / or total harmonic distortion rate of the target signal; Based on the root mean square value and / or total harmonic distortion rate of the target signal, the type detection result and duty cycle modulation detection result of the target signal are obtained; the type detection result indicates that the target signal is a full-wave signal, a positive half-wave signal, or a negative half-wave signal, and the duty cycle modulation detection result indicates the duty cycle modulation parameter of the target signal; The electrical load is controlled according to the control strategy corresponding to the type detection result and the duty cycle modulation detection result.

12. The control method according to claim 8, characterized in that, The control method is specifically applied to the control device according to any one of claims 5 to 7; the step of performing waveform detection on the target signal to obtain a detection result of whether the target signal is a half-wave signal or a full-wave signal, and controlling the electrical load according to the detection result, includes: The target signal is subjected to waveform detection to determine a first signal parameter and a second signal parameter; the first signal parameter includes the root mean square value and / or the total harmonic distortion rate, and the second signal parameter includes the total harmonic distortion rate and / or the harmonic energy distribution; Based on the first signal parameters, the type detection result and duty cycle modulation detection result of the target signal are obtained; the type detection result indicates that the target signal is a full-wave signal, a positive half-wave signal, or a negative half-wave signal, and the duty cycle modulation detection result indicates the duty cycle modulation parameter of the target signal; Based on the second signal parameters, the frequency modulation detection result of the target signal is obtained; the frequency modulation detection result characterizes the frequency modulation parameters of the target signal. The electrical load is controlled according to the control strategy corresponding to the type detection result, the duty cycle modulation detection result, and the frequency modulation detection result.

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