Multi-load ultrasonic driving power supply
By integrating the conversion switch module, the frequency search circuit control module, the matching current control module and the distribution control module in the ultrasonic driving power supply, the precise control and efficient driving of multiple ultrasonic devices are achieved, which solves the problem that traditional power supply cannot fully utilize the advanced control functions. Problems, improves the flexibility and stability of the equipment, and reduces cost and volume.
Patent Information
- Application Number
- CN202411279642.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2044-09-12
AI Technical Summary
Although traditional external distribution control units can enable a single power supply to drive multiple ultrasonic loads, they cannot fully utilize the advanced control functions of the power supply, resulting in increased cost, volume and control complexity, and limited equipment flexibility and scalability.
A multi-load ultrasonic driving power supply is designed, including a conversion switch module, a frequency search circuit control module, a matching current control module and a distribution control module. Through the coordinated work of these modules, precise control and efficient driving of multiple ultrasonic devices are achieved. Optimize power distribution, improve system stability and reliability, and prevent failures through real-time monitoring and adjustment mechanisms.
Accurate control and efficient driving of multiple ultrasonic devices, optimize energy efficiency, reduce cost and volume, improve equipment flexibility and scalability, enhance system stability and reliability, and provide fault diagnosis and maintenance. Data support is provided.
Smart Images

Figure CN119140405A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of high-power ultrasonic waves, and in particular to a multi-load ultrasonic driving power supply. Background Art
[0002] With the rapid development of industrial automation and digitalization, ultrasonic equipment is increasingly used in the industrial field. However, the driving problem of ultrasonic equipment has always been a technical bottleneck, that is, each load needs to be equipped with an independent driving power supply, which not only increases the cost, volume and control complexity, but also limits the flexibility and scalability of the equipment. Although the traditional external distribution control unit can realize a single power supply to drive multiple loads, it cannot fully utilize the advanced control functions of the power supply.
[0003] The current technical challenge is to enable one driving power supply to drive multiple loads at the same time and allow fine control. For this purpose, a multi-load ultrasonic driving power supply has been developed to solve the problem that although the traditional external distribution control unit can realize a single power supply to drive multiple loads, it cannot fully utilize the advanced control functions of the power supply. Summary of the invention
[0004] The purpose of the present invention is to provide a multi-load ultrasonic driving power supply to solve the problem that although the traditional external distribution control unit can realize a single power supply to drive multiple loads, it cannot fully utilize the advanced control function of the power supply.
[0005] The present invention provides a multi-load ultrasonic driving power supply, comprising: a conversion switch module, a frequency search circuit control module, a matching current control module and a distribution control module, wherein the conversion switch module, the frequency search circuit control module, the matching current control module and the distribution control module are installed inside the ultrasonic driving power supply;
[0006] Transfer switch module: used to synchronously switch the matching circuit when switching different loads;
[0007] Frequency search circuit control module: used to synchronously activate the frequency search circuit when the conversion switch is started. The frequency search circuit control module is also used for frequency matching, power matching, impedance matching and capacitance matching;
[0008] Matching current control module: used to achieve current matching with ultrasonic equipment;
[0009] Distribution control module: used to enable one driving power supply to drive multiple loads to work, and synchronously start the frequency search circuit control module and the matching current control module;
[0010] The conversion switch module receives the switching instruction from the user or the external system, transmits the switching instruction to the frequency search circuit control module and the matching current control module, and sends a signal to the distribution control module. After receiving the signal sent by the conversion switch module, the distribution control module generates a multi-load load distribution strategy;
[0011] The frequency search circuit control module activates the frequency search circuit according to the load distribution strategy of multiple loads, and feeds back the frequency information of the activated frequency search circuit to the distribution control module;
[0012] The matching current control module receives the switching instruction from the conversion switch module and the frequency information of the activated frequency search circuit, and adjusts the current to match the current with the ultrasonic device.
[0013] Furthermore, the multi-load ultrasonic driving power supply and the switching module provided by the present invention include:
[0014] Parse the received switching instructions to obtain the switching target and parameters, pass the parsed switching instructions to the frequency search circuit control module and the matching current control module, and send a signal to the distribution control module to notify the new load switching requirements;
[0015] According to the switching instruction, the matching circuit is switched synchronously so that the new load receives the power matching setting, the status of the switching process is monitored, and the switching status or error information is fed back to the user end and the background control end.
[0016] Furthermore, the multi-load ultrasonic driving power supply and frequency search circuit control module provided by the present invention include:
[0017] When the conversion switch module receives a switching instruction from the user or an external system, the frequency search circuit control module receives a start signal;
[0018] The frequency search circuit control module activates the internal frequency search circuit according to the received start signal, and the frequency search circuit is used to scan or detect the best ultrasonic working frequency;
[0019] The frequency search circuit performs frequency scanning, finds the best ultrasonic working frequency through the frequency scanning algorithm, and transmits the best ultrasonic working frequency to the frequency search circuit control module;
[0020] The frequency search circuit control module pre-processes the received optimal ultrasonic working frequency and then feeds it back to the distribution control module.
[0021] Furthermore, the multi-load ultrasonic driving power supply provided by the present invention matches the current control mode, including:
[0022] The matching current control module receives the switching instruction from the conversion switch module, and simultaneously receives the frequency information of the activated frequency search circuit provided by the frequency search circuit control module;
[0023] According to the received frequency information, the current operating frequency of the ultrasonic device is analyzed, and the magnitude and phase of the output current are adjusted according to the analysis result so that the current matches the operating frequency and load requirements of the ultrasonic device;
[0024] The matching current control module will feed back its adjusted current state to the distribution control module or other related modules to maintain the overall synchronization and stability of the system.
[0025] Furthermore, the multi-load ultrasonic driving power supply provided by the present invention has a distribution control module, including:
[0026] When the transfer switch module receives a load switching instruction from a user or an external system, the generation process of the load distribution strategy begins;
[0027] The conversion switch module transmits the switching instruction to the frequency search circuit control module and the matching current control module.
[0028] At the same time, a signal is sent to the distribution control module to notify it of a new load switching requirement. After receiving the signal, the distribution control module analyzes the current system status including the number, type and working status of the connected loads;
[0029] According to the preset allocation rules, the allocation control module generates a load allocation strategy for multiple loads. Based on the generated load allocation strategy, the allocation control module synchronously starts the frequency search circuit control module to make the frequency search circuit control module start working. The frequency search circuit control module activates the corresponding frequency search circuit according to the strategy to find and lock the optimal operating frequency of each ultrasonic device.
[0030] Furthermore, the multi-load ultrasonic driving power supply provided by the present invention also includes an optimization unit, which collects current parameters and voltage parameters, analyzes the load distribution strategy, and dynamically adjusts it based on the real-time load status and power supply capacity to balance the power distribution between the loads.
[0031] Furthermore, the multi-load ultrasonic driving power supply provided by the present invention further includes a detection unit,
[0032] The detection unit uses built-in current sensors and voltage sensors to monitor the current and voltage changes of the ultrasonic equipment in real time during operation.
[0033] Use the frequency detector to detect the working frequency of the ultrasonic equipment in real time and compare it with the optimal working frequency provided by the frequency search circuit control module;
[0034] The detection unit evaluates the overall status of the load in real time by monitoring the connection and disconnection status of the load and the working status of the load.
[0035] Beneficial effects of the present invention: The present invention uses an integrated design to accurately control and efficiently drive multiple ultrasonic devices, optimizes the energy distribution of the power supply, and thus improves the overall energy efficiency. Secondly, the present invention significantly improves the stability and reliability of the system. Through the coordinated work of the frequency search circuit control module and the matching current control module, the current is ensured to accurately match the operating frequency and load requirements of the ultrasonic device. At the same time, the real-time monitoring and adjustment mechanism prevents the occurrence of faults. In addition, it can also reduce costs and volume, because one driving power supply can drive multiple loads to work, which is compared with the traditional method that each load needs to be independently equipped with a driving power supply, which significantly reduces costs, volume and control complexity. Moreover, the present invention also improves flexibility and scalability, so that it can more flexibly respond to the needs of different loads and is suitable for various complex and changeable working conditions. In addition, it also optimizes the energy conversion efficiency, dynamically adjusts the optimization unit, and balances the power distribution between the loads. The intelligence and automation level of the present invention has also been improved, which is achieved by introducing intelligent matching and allocation strategies. Finally, it also provides data support for subsequent fault diagnosis, performance optimization and equipment maintenance, and improves the convenience and efficiency of equipment maintenance. BRIEF DESCRIPTION OF THE DRAWINGS
[0036] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0037] Figure 1 A schematic diagram of a usage scenario of a multi-load ultrasonic driving power supply provided in an embodiment of the present invention.
[0038] Description of the figure numbers: 1. 4-BNC connector, 2. Power host switching board, 3. Power amplifier board, 4. 5. Power display screen, 6. Power main board, 7. Ultrasonic equipment. DETAILED DESCRIPTION
[0039] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The technical solutions provided by the embodiments of the present invention are described in detail below in conjunction with the drawings.
[0040] See also Figure 1 The present invention provides a multi-load ultrasonic driving power supply.
[0041] The present invention provides a multi-load ultrasonic driving power supply, comprising: a conversion switch module, a frequency search circuit control module, a matching current control module and a distribution control module, wherein the conversion switch module, the frequency search circuit control module, the matching current control module and the distribution control module are installed inside the ultrasonic driving power supply;
[0042] Transfer switch module: used to synchronously switch the matching circuit when switching different loads;
[0043] Frequency search circuit control module: used to synchronously activate the frequency search circuit when the conversion switch is started. The frequency search circuit control module is also used for frequency matching, power matching, impedance matching and capacitance matching;
[0044] Matching current control module: used to achieve current matching with ultrasonic equipment;
[0045] Distribution control module: used to enable one driving power supply to drive multiple loads to work, and synchronously start the frequency search circuit control module and the matching current control module;
[0046] The conversion switch module receives the switching instruction from the user or the external system, transmits the switching instruction to the frequency search circuit control module and the matching current control module, and sends a signal to the distribution control module. After receiving the signal sent by the conversion switch module, the distribution control module generates a multi-load load distribution strategy;
[0047] The frequency search circuit control module activates the frequency search circuit according to the load distribution strategy of multiple loads, and feeds back the frequency information of the activated frequency search circuit to the distribution control module;
[0048] The frequency search circuit control module is a key part of the multi-load ultrasonic drive power supply and has many important functions. When the conversion switch is started, the frequency search circuit control module synchronously activates the frequency search circuit and performs frequency scanning to find the optimal ultrasonic operating frequency. In addition, the frequency search circuit control module is also responsible for power matching, impedance matching and capacitance matching to fully match the power supply with the ultrasonic equipment. The frequency search circuit control module also pre-processes the received optimal ultrasonic operating frequency and feeds it back to the distribution control module for subsequent processing and distribution. Through close cooperation with other modules, the frequency search circuit control module enables the efficient and stable operation of ultrasonic equipment, improves equipment performance, enhances system flexibility, and reduces energy consumption.
[0049] The matching current control module receives the switching instruction from the conversion switch module and the frequency information of the activated frequency search circuit, and adjusts the current to match the current with the ultrasonic device.
[0050] The present invention provides a multi-load ultrasonic driving power supply, which includes four main modules: a conversion switch module, a frequency search circuit control module, a matching current control module and a distribution control module. These modules each have different functions and together realize the efficient and stable operation of the driving power supply.
[0051] The transfer switch module is responsible for synchronously switching the matching circuit when switching different loads. It receives switching instructions from users or external systems, passes these instructions to the frequency search circuit control module and the matching current control module, and sends signals to the distribution control module.
[0052] The main task of the frequency search circuit control module is to synchronously activate the frequency search circuit when the transfer switch is turned on. It will activate the frequency search circuit according to the multi-load load distribution strategy generated by the distribution control module, and feed back the frequency information of the activated frequency search circuit to the distribution control module.
[0053] The matching current control module is responsible for matching the current with the ultrasonic device. It receives the switching instruction from the conversion switch module and the frequency information of the activated frequency search circuit, and then adjusts the current to ensure a good match with the ultrasonic device.
[0054] Finally, the distribution control module is used to enable a driving power supply to drive multiple loads, and synchronously start the frequency search circuit control module and the matching current control module. After receiving the signal sent by the conversion switch module, it generates a multi-load load distribution strategy. Through the coordinated work of each module, the multi-load ultrasonic driving power supply provided by the present invention can achieve efficient and stable operation and meet the needs of different loads.
[0055] The ultrasonic equipment of the present invention adopts 4 sets of 35kv ultrasonic atomizers.
[0056] Specifically, the multi-load ultrasonic driving power supply and the switching module provided by the present invention include:
[0057] Parse the received switching instructions to obtain the switching target and parameters, pass the parsed switching instructions to the frequency search circuit control module and the matching current control module, and send a signal to the distribution control module to notify the new load switching requirements;
[0058] According to the switching instruction, the matching circuit is switched synchronously so that the new load receives the power matching setting, the status of the switching process is monitored, and the switching status or error information is fed back to the user end and the background control end.
[0059] Specifically, the multi-load ultrasonic driving power supply and frequency search circuit control module provided by the present invention include:
[0060] When the conversion switch module receives a switching instruction from the user or an external system, the frequency search circuit control module receives a start signal;
[0061] The frequency search circuit control module activates the internal frequency search circuit according to the received start signal, and the frequency search circuit is used to scan or detect the best ultrasonic working frequency;
[0062] The frequency search circuit performs frequency scanning, finds the best ultrasonic working frequency through the frequency scanning algorithm, and transmits the best ultrasonic working frequency to the frequency search circuit control module;
[0063] The frequency search circuit control module pre-processes the received optimal ultrasonic working frequency and then feeds it back to the distribution control module.
[0064] Specifically, the multi-load ultrasonic driving power supply provided by the present invention matches the current control mode, including:
[0065] The matching current control module receives the switching instruction from the conversion switch module, and simultaneously receives the frequency information of the activated frequency search circuit provided by the frequency search circuit control module;
[0066] According to the received frequency information, the current operating frequency of the ultrasonic device is analyzed, and the magnitude and phase of the output current are adjusted according to the analysis result so that the current matches the operating frequency and load requirements of the ultrasonic device;
[0067] The matching current control module will feed back its adjusted current state to the distribution control module or other related modules to maintain the overall synchronization and stability of the system.
[0068] Specifically, the multi-load ultrasonic driving power supply provided by the present invention includes a distribution control module, which includes:
[0069] When the transfer switch module receives a load switching instruction from a user or an external system, the generation process of the load distribution strategy begins;
[0070] The conversion switch module transmits the switching instruction to the frequency search circuit control module and the matching current control module.
[0071] At the same time, a signal is sent to the distribution control module to notify it of a new load switching requirement. After receiving the signal, the distribution control module analyzes the current system status including the number, type and working status of the connected loads;
[0072] According to the preset allocation rules, the allocation control module generates a load allocation strategy for multiple loads. Based on the generated load allocation strategy, the allocation control module synchronously starts the frequency search circuit control module to make the frequency search circuit control module start working. The frequency search circuit control module activates the corresponding frequency search circuit according to the strategy to find and lock the optimal operating frequency of each ultrasonic device.
[0073] Specifically, the multi-load ultrasonic driving power supply provided by the present invention also includes an optimization unit, which collects current parameters and voltage parameters, analyzes the load distribution strategy, and dynamically adjusts it based on the real-time load status and power supply capacity to balance the power distribution between the loads.
[0074] The optimization unit adjusts the power output to maximize the energy conversion efficiency of the ultrasonic equipment by monitoring parameters such as current, voltage and power, reducing energy waste and improving the energy efficiency of the overall system.
[0075] Using the optimal operating frequency information provided by the frequency search circuit control module, the optimization unit can further fine-tune these frequencies to adapt to slight changes in different loads, so that the ultrasonic equipment always operates at the optimal frequency, improving working stability and efficiency.
[0076] The optimization unit can analyze the load distribution strategy generated by the distribution control module and dynamically adjust it based on the real-time load status and power supply capacity to balance the power distribution between loads and prevent overload or underload.
[0077] Fault prediction and prevention: By monitoring the operating status and parameter changes of each module, the optimization unit can predict potential faults and take preventive measures in advance, thus reducing downtime and improving system reliability and maintainability.
[0078] Control algorithm optimization: The optimization unit can integrate or update advanced control algorithms, such as adaptive control, fuzzy control or neural network control, to improve the response speed and accuracy of the system, making the system more intelligent and flexible and adaptable to complex and changing working conditions.
[0079] Specifically, the multi-load ultrasonic driving power supply provided by the present invention further includes a detection unit,
[0080] The detection unit uses built-in current sensors and voltage sensors to monitor the current and voltage changes of the ultrasonic equipment in real time during operation.
[0081] Use the frequency detector to detect the working frequency of the ultrasonic equipment in real time and compare it with the optimal working frequency provided by the frequency search circuit control module;
[0082] The detection unit evaluates the overall status of the load in real time by monitoring the connection and disconnection status of the load and the working status of the load.
[0083] Current and voltage detection: The detection unit uses built-in current sensors and voltage sensors to monitor the current and voltage changes of the ultrasonic equipment in real time during operation, so as to match the current with the ultrasonic equipment and prevent overload or underload.
[0084] Frequency detection: Use the frequency detector to detect the working frequency of the ultrasonic equipment in real time and compare it with the optimal working frequency provided by the frequency search circuit control module. This ensures that the ultrasonic equipment always operates at the optimal working frequency, improving work efficiency and stability.
[0085] Load status detection: The detection unit evaluates the overall status of the load in real time by monitoring the connection and disconnection status of the load, as well as the working status of the load (such as whether it is operating normally, whether there is a fault, etc.). Provide real-time load information to the distribution control module so that the load distribution strategy can be adjusted in time.
[0086] Error and abnormality detection: The detection unit also has the function of error and abnormality detection, which can monitor and identify errors and abnormal conditions (such as short circuit, open circuit, overload, etc.) in the system in real time. It can issue alarms or take corresponding measures in time to prevent the expansion of faults and ensure the stable operation of the system.
[0087] Data recording and analysis: The detection unit also has data recording and analysis functions, which can record the operation data of the equipment in real time and conduct preliminary data analysis, providing data support for subsequent fault diagnosis, performance optimization and equipment maintenance.
[0088] First, the present invention adopts an integrated design, integrating the conversion switch module, the frequency search circuit control module, the matching current control module and the distribution control module inside the ultrasonic driving power supply. The present invention enables the power supply to more finely control multiple ultrasonic devices and realizes precise driving of the devices.
[0089] Secondly, through intelligent matching and distribution strategies, the distribution control module can generate load distribution strategies for multiple loads according to the real-time status of the system, so that the load distribution strategy adjustment of the loads can be dynamically optimized. At the same time, the coordinated work of the frequency search circuit control module and the matching current control module enables the current to accurately match the working frequency and load requirements of the ultrasonic equipment.
[0090] In addition, the present invention also introduces a real-time monitoring and adjustment mechanism. Through the real-time monitoring of key parameters by the detection unit, the dynamic adjustment of the load distribution strategy is realized to balance the power distribution between the loads, thereby improving the energy efficiency and stability of the overall system. At the same time, the fault prediction and prevention function also enhances the reliability of the system.
[0091] Finally, the flexibility and scalability of the present invention and the characteristics of efficient use of power supply functions enable it to more flexibly respond to the needs of different loads, fully utilize the advanced control functions of the power supply, and achieve precise control and efficient driving of multiple ultrasonic devices.
[0092] In summary, the technical solution of the present invention effectively solves the problems existing in the traditional external distribution control unit, and provides a strong guarantee for the efficiency and reliability of ultrasonic equipment in industrial applications.
[0093] The above-described embodiments of the present invention do not limit the protection scope of the present invention.
Claims
1. Multi-load ultrasonic driving power supply, characterized in that: include: The conversion switch module, the frequency search circuit control module, the matching current control module and the distribution control module are installed inside the ultrasonic drive power supply; Transfer switch module: used to synchronously switch the matching circuit when switching different loads; Frequency search circuit control module: used to synchronously activate the frequency search circuit when the conversion switch is started. The frequency search circuit control module is also used for frequency matching, power matching, impedance matching and capacitance matching; Matching current control module: used to achieve current matching with ultrasonic equipment; Distribution control module: used to enable one driving power supply to drive multiple loads to work, and synchronously start the frequency search circuit control module and the matching current control module; The conversion switch module receives the switching instruction from the user or the external system, transmits the switching instruction to the frequency search circuit control module and the matching current control module, and sends a signal to the distribution control module. After receiving the signal sent by the conversion switch module, the distribution control module generates a multi-load load distribution strategy; The frequency search circuit control module activates the frequency search circuit according to the load distribution strategy of multiple loads, and feeds back the frequency information of the activated frequency search circuit to the distribution control module; The matching current control module receives the switching instruction from the conversion switch module and the frequency information of the activated frequency search circuit, and adjusts the current to match the current with the ultrasonic device.
2. The multi-load ultrasonic driving power supply according to claim 1, characterized in that: Transfer switch module, including Parse the received switching instructions to obtain the switching target and parameters, pass the parsed switching instructions to the frequency search circuit control module and the matching current control module, and send a signal to the distribution control module to notify the new load switching requirements; According to the switching instruction, the matching circuit is switched synchronously so that the new load receives the power matching setting, the status of the switching process is monitored, and the switching status or error information is fed back to the user end and the background control end.
3. The multi-load ultrasonic driving power supply according to claim 1, characterized in that: The frequency search circuit control module comprises: When the conversion switch module receives a switching instruction from the user or an external system, the frequency search circuit control module receives a start signal; The frequency search circuit control module activates the internal frequency search circuit according to the received start signal, and the frequency search circuit is used to scan or detect the best ultrasonic working frequency; The frequency search circuit performs frequency scanning, finds the best ultrasonic working frequency through the frequency scanning algorithm, and transmits the best ultrasonic working frequency to the frequency search circuit control module; The frequency search circuit control module pre-processes the received optimal ultrasonic working frequency and then feeds it back to the distribution control module.
4. The multi-load ultrasonic driving power supply according to claim 1, characterized in that: Matching current control mode, including; The matching current control module receives the switching instruction from the conversion switch module, and simultaneously receives the frequency information of the activated frequency search circuit provided by the frequency search circuit control module; According to the received frequency information, the current operating frequency of the ultrasonic device is analyzed, and the magnitude and phase of the output current are adjusted according to the analysis result so that the current matches the operating frequency and load requirements of the ultrasonic device; The matching current control module will feed back its adjusted current state to the distribution control module or other related modules to maintain the overall synchronization and stability of the system.
5. The multi-load ultrasonic driving power supply according to claim 1, characterized in that: Distribution control module, including; When the transfer switch module receives a load switching instruction from a user or an external system, the generation process of the load distribution strategy begins; The conversion switch module transmits the switching instruction to the frequency search circuit control module and the matching current control module, and sends a signal to the distribution control module to notify it of a new load switching requirement. After receiving the signal, the distribution control module analyzes the current system status including the number, type and working status of the connected loads; According to the preset allocation rules, the allocation control module generates a load allocation strategy for multiple loads. Based on the generated load allocation strategy, the allocation control module synchronously starts the frequency search circuit control module to make the frequency search circuit control module start working. The frequency search circuit control module activates the corresponding frequency search circuit according to the strategy to find and lock the optimal operating frequency of each ultrasonic device.
6. The multi-load ultrasonic driving power supply according to claim 1, characterized in that: It also includes an optimization unit, which collects current parameters and voltage parameters, analyzes the load distribution strategy, and makes dynamic adjustments based on the real-time load status and power supply capacity to balance the power distribution among the loads.
7. The multi-load ultrasonic driving power supply according to claim 1, characterized in that: Also includes a detection unit, The detection unit uses built-in current sensors and voltage sensors to monitor the current and voltage changes of the ultrasonic equipment in real time during operation. Use the frequency detector to detect the working frequency of the ultrasonic equipment in real time and compare it with the optimal working frequency provided by the frequency search circuit control module; The detection unit evaluates the overall status of the load in real time by monitoring the connection and disconnection status of the load and the working status of the load.
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