A safety control method and system of intelligent extension socket

Abstract

The application discloses a kind of safety control method and system of intelligent row plug, it is related to intelligent electrical appliance technical field;Method includes: the number of detection plug pin and insertion time difference, judge normal plug insertion or foreign matter insertion;Normal insertion wakes up light sensor, detects the distance of plug shell and panel adhesion, judges effective insertion and powers on after time delay;Supply power is continuously monitored during distance, immediately power off when loose or fall off, automatically restore power supply after position recovery;Low-power idle state is detected simultaneously and automatically powered off, after power off, memory recovery is realized by periodic detection pulse in combination with distance detection, without reinsertion to restore power supply;The application realizes foreign matter identification, anti-arcing, anti-loose and fall off, low-power energy-saving integrated intelligent control, high safety, convenient to use.

Description

Technical Field

[0001] This invention relates to the field of intelligent electrical appliance technology, specifically to a safety control method and system for an intelligent power strip. Background Technology

[0002] Power strips (also known as sockets or extension cords) are indispensable power distribution devices in daily life. However, traditional power strips pose several safety hazards during use, mainly in the following aspects:

[0003] 1. When the plug pins first contact the metal contacts of the socket, the contact resistance is relatively high because the plug is not fully inserted, resulting in concentrated current and arcing. Prolonged use of such power strips can easily lead to oxidation of the contacts, poor contact, and even fire. While some existing power strips have a delayed power-on function, this delay mechanism is independent of the plug insertion event; the unloaded socket remains energized, failing to fundamentally solve the problem of arcing upon insertion.

[0004] Second, if a child inserts a conductive object such as a wire or hairpin into a single socket, and that socket happens to be the live wire socket while the power strip is energized, it will directly cause an electric shock. Traditional power strips often use mechanical safety shutters for physical protection. These shutters work by using a spring mechanism to ensure that both prongs are inserted simultaneously before the shutter opens. However, after prolonged use, the springs in these mechanical safety shutters are prone to fatigue, wear, and jamming, leading to safety failure. Furthermore, mechanical safety shutters only provide physical obstruction and cannot output electrical feedback signals, thus preventing remote alarms or intelligent control.

[0005] Third, during use, due to the weight of the plug itself or the vertical installation of the power strip, the plug may gradually sag and loosen under gravity. At this time, the prongs are exposed, and if a sharp metal object touches the exposed prongs, it can easily cause electric shock or short circuit. Current power strips do not have plug loosening detection or automatic power-off functions. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a safety control method and system for intelligent power strips, overcoming the deficiencies of existing technologies.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] This invention provides a safety control method for intelligent power strips, comprising the following steps:

[0009] Step 1: Detect the number of plugs inserted and the time difference between insertions within the same socket group. Based on the number of insertions and the time difference between insertions, as well as the preset synchronization time window threshold, determine whether the insertion behavior of the socket group is a normal plug insertion or a foreign object insertion. If it is a foreign object insertion, keep the socket group powered off.

[0010] Step 2: After determining that the plug is inserted normally, the light sensor corresponding to the socket group is activated. The light sensor detects the distance between the plug shell and the power strip panel. Based on the comparison result of the distance and the preset contact distance threshold, it is determined whether the plug is effectively inserted.

[0011] Step 3: After determining that the plug is validly inserted, the socket group is powered on and outputs power after a preset power-on delay time;

[0012] Step 4: During the power output of the socket group, the distance is continuously detected by the light sensor, and the power of the socket group is controlled to be turned on and off based on the comparison result between the distance and the preset contact distance threshold.

[0013] Step 5: During the power output of the socket group, continuously sample the load power of the output circuit of the socket group. When the load power is less than or equal to the preset standby power threshold and continues to exceed the preset standby confirmation time, control the socket group to cut off the power.

[0014] Step 6: After the socket group is powered off, it periodically outputs weak detection pulses and detects the distance through the optical sensor. Based on the distance, it determines whether the plug is in place. If it is in place, the configuration memory is retained and the power supply is automatically restored when the load connection conditions are met. If it has been unplugged, the configuration memory is cleared and the optical sensor is restored to standby sleep state.

[0015] Preferably, in step 1, if it is detected that the number of pins inserted in the same socket group is less than two, it is determined to be a foreign object insertion;

[0016] If two or three pins are detected inserted in the same socket group, the insertion time of each pin is recorded, and the insertion time difference between the first and last detected pin is calculated.

[0017] If the insertion time difference is greater than the preset synchronization time window threshold, it is determined to be foreign object insertion;

[0018] If the insertion time difference is less than or equal to the preset synchronization time window threshold, it is determined to be a normal plug insertion.

[0019] Preferably, in step 2, the optical sensor is in standby sleep mode by default and does not output a detection signal; only after it is determined that a normal plug is inserted will a wake-up signal be sent to the optical sensor to make the optical sensor enter the working state.

[0020] After the optical sensor enters the working state, it emits a detection beam to the outside of the power strip panel and receives the reflected light reflected back from the end face of the plug housing.

[0021] If the distance is less than or equal to the preset fitting distance threshold, the plug is determined to be effectively inserted.

[0022] If the distance is greater than the preset fitting distance threshold, it is determined that the plug is not effectively inserted, and the socket group is kept off power.

[0023] Preferably, in step 3, after the socket group is powered on, the optical sensor remains in working state and continuously detects the distance.

[0024] Preferably, in step 4, when the distance is greater than the preset contact distance threshold, it is determined that the plug has become loose or fallen off, and the power to the socket group is immediately cut off.

[0025] When the distance recovers to less than or equal to the preset fitting distance threshold, the delayed power-on timing is restarted, and after the preset power-on delay time, the socket group is controlled to resume power supply.

[0026] Preferably, the safety control method for the intelligent power strip further includes a remote management step:

[0027] Receive configuration or control commands from the remote management terminal via the wireless communication module and perform at least one of the following operations:

[0028] (a) Update the preset power-on delay time or preset standby confirmation time according to the configuration instruction. The updated parameters are used for the execution of subsequent steps 3 or 5.

[0029] (b) Remotely control the power supply to a specified socket group or all socket groups according to the control command;

[0030] (c) Report the energy consumption statistics of the smart power strip to the remote management terminal according to the control command.

[0031] Preferably, in step 4, when the distance is greater than the preset fitting distance threshold and continues to exceed the preset loosening confirmation time, a local audible and visual alarm is triggered or a loosening alarm event is reported to the remote management terminal, and then the power to the socket group is cut off.

[0032] The present invention also provides a safety control system for an intelligent power strip, which executes the safety control method described above, including:

[0033] The main body of the power strip has several sets of socket components arranged side by side on its panel, and each set of socket components is powered independently.

[0034] A power input terminal is located on the main body of the power strip and is used to connect to mains power.

[0035] The power module is located inside the power strip body and is electrically connected to the power input terminal, used to provide operating voltage for each electrical component of the system.

[0036] A resettable baffle is provided behind each socket in each group of socket assemblies, and the baffles corresponding to each socket are set independently. The baffles corresponding to a single socket can be displaced independently when inserted, but only when at least two sockets in the same socket group are inserted synchronously within a preset synchronization time window threshold will the baffles corresponding to each socket be displaced and trigger their respective trigger switches to switch to the on state. After the plug is pulled out, each baffle is reset to the initial position, and each trigger switch synchronously returns to the off state.

[0037] A trigger switch is installed inside the power strip body and located on the displacement path of the resettable baffle, switching the on / off state as the resettable baffle moves.

[0038] Each set of socket components is equipped with a reflective photoelectric sensor, which is installed on the inside of the power strip panel to detect the distance between the plug shell and the power strip panel. The photoelectric sensor is in standby sleep mode by default and is only awakened to work mode after the trigger switch is switched to the conduction state.

[0039] A relay switch unit, corresponding one-to-one with each of the aforementioned socket assemblies, is connected in series in the power supply circuit of the corresponding socket assembly and is used to independently control the power on and off of each group of socket assemblies.

[0040] A current and power sampling circuit is located on the main power supply line inside the power strip body, and is used to sample the total load power of the smart power strip.

[0041] The MCU control unit is electrically connected to the trigger switch, the light sensor, each of the relay switch units, the current power sampling circuit, and the wireless communication module, respectively, and is used to execute the method steps of any one of claims 1 to 7;

[0042] The wireless communication module establishes a bidirectional data communication connection with the MCU control unit for data interaction with the remote management terminal.

[0043] Preferably, the resettable baffle is an elastic reset baffle, and the baffle corresponding to each socket returns to its initial position by elastic force after the plug is pulled out, and the trigger switch synchronously returns to the off state.

[0044] Preferably, the MCU control unit includes a timing module and a storage unit;

[0045] The storage unit is used to store the following control parameters: the preset power-on delay time, the preset standby power threshold, and the preset standby confirmation time;

[0046] The storage unit is also used to store the configuration memory of each socket group and the energy consumption statistics.

[0047] This invention provides a safety control method and system for intelligent power strips. It has the following beneficial effects:

[0048] First, to address the issue of arcing during plug insertion, this solution employs a three-tiered judgment mechanism: foreign object detection, valid insertion determination, and delayed power-on. This ensures that power is only supplied after the plug is fully inserted and the pins are in complete contact with the spring contacts, thus eliminating arcing at the moment of insertion.

[0049] Secondly, regarding the risk of electric shock caused by inserting a foreign object into a single hole, this solution provides triple protection through multi-baffle synchronous triggering + pin number detection + synchronous time difference judgment. The baffles behind each hole in the same hole group are set independently. When a foreign object is inserted into a single hole, only a single baffle is displaced, which cannot meet the electrical judgment condition that at least two trigger switches are turned on at the same time. The hole always remains completely de-energized, and the safety is far superior to traditional mechanical protection doors.

[0050] Furthermore, to address the risk of electric shock caused by exposed prongs due to loose plugs, this solution uses a light sensor to continuously monitor the distance between the plug housing and the panel after power is applied. Once a loose or detached plug is detected, the power is immediately cut off, effectively preventing electric shock or short circuit accidents caused by exposed prongs.

[0051] Meanwhile, the optical sensor is normally in standby sleep mode and is only awakened to work after the trigger switch is triggered (i.e., the plug is inserted normally). The standby power consumption is extremely low, which meets the requirements of green energy saving. After a power failure, the power supply can be automatically restored without unplugging and plugging the plug again, which is convenient to use. Each socket group is equipped with only one optical sensor, which supports remote parameter configuration (power-on delay time, standby confirmation time), remote on / off control and load power data reporting, meeting the needs of intelligent management.

[0052] Ultimately, this solution organically combines multiple mechanisms, including foreign object recognition, plug insertion detection and delayed power-on, immediate power-off when the plug is loose or detached, low-power standby, and in-situ memory recovery, to solve the technical problems of traditional power strips, such as sparking when plugs are inserted, electric shock when a foreign object is inserted into a single hole, electric shock when a plug is loose or detached, high sensor power consumption, and cumbersome recovery operations after power failure. This solution significantly improves the safety and user experience of power strips. Attached Figure Description

[0053] Figure 1 This is a diagram showing the distribution of the socket assembly of the present invention.

[0054] Figure 2 This is a schematic diagram illustrating the distance determination method of the present invention.

[0055] Figure 3 This is a schematic diagram of the socket assembly of the present invention.

[0056] Figure 4 This is a schematic diagram comparing the response time in a foreign object insertion scenario according to the present invention.

[0057] Figure 5 This is a schematic diagram of the module connection relationship of the present invention. Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, 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.

[0059] Example 1: The safety control system of the intelligent power strip in this example includes a power strip body, a power input terminal, a power module, several sets of socket assemblies, a resettable baffle, a contact switch, a light sensor, a relay switch unit, a current and power sampling circuit, an MCU control unit, and a wireless communication module.

[0060] The main body of the power strip has several sets of socket components arranged side by side on the panel (this embodiment takes a five-hole power strip as an example, that is, each set of socket components includes a two-hole socket unit and a three-hole socket unit, for a total of five sockets, which are divided into two sets of control units), and each set of socket components is powered independently.

[0061] The power input terminal is located at the end of the power strip body and is connected to the mains power (220V / 50Hz) via a power cord.

[0062] The power module is located inside the power strip body. Its input terminal is connected to the power input terminal to convert the mains voltage into DC operating voltage (such as 5VDC or 3.3VDC) to provide operating voltage for electrical components such as MCU control unit, optical sensor, and wireless communication module.

[0063] Example 2: Figure 1 As shown, each socket assembly has a resettable baffle behind each socket. Taking a two-hole socket unit as an example, there is a resettable baffle behind both the live wire socket and the neutral wire socket. Each resettable baffle is a spring-loaded reset baffle, installed inside the socket body via a pivot, and equipped with a reset spring.

[0064] The trigger switches are installed inside the power strip body and located on the displacement path of each baffle. Each baffle moves independently, triggering its corresponding trigger switch.

[0065] When the user inserts both prongs of the two-prong plug into the two-hole socket unit simultaneously, the two prongs simultaneously push against the corresponding baffles. The two baffles move synchronously, each triggering its corresponding trigger switch to switch to the ON state. The ON signal of each trigger switch is transmitted to the MCU control unit, which records the arrival time of each trigger signal.

[0066] After the pins are pulled out, each baffle returns to its initial position by elastic force, and each trigger switch synchronously returns to the off state.

[0067] Example 3: Figure 2 As shown, each socket assembly is equipped with a reflective photoelectric sensor as a light sensor. The light sensor is installed on the inside of the power strip panel, at the edge of the corresponding socket assembly, with both its transmitting and receiving ends facing outwards from the panel. The detection distance range of the light sensor is 0.5mm to 5mm, where 0.5mm to 3mm is the contact detection range; and 3mm to 5mm is the loosening and detachment detection range.

[0068] The power supply terminal of the optical sensor is connected to the output terminal of the power supply module, the enable terminal is connected to the first signal output terminal of the MCU control unit, and the signal output terminal is connected to the first signal input terminal of the MCU control unit.

[0069] The optical sensor is in standby sleep mode by default, emitting no detection beam and outputting no detection signal, resulting in extremely low power consumption. The optical sensor only enters the working state when the MCU control unit detects that the contact switch is closed and sends a wake-up signal to the enable terminal of the optical sensor through the first signal output terminal.

[0070] After the light sensor enters the working state, its transmitting end emits a detection beam towards the outside of the panel. When the end face of the plug housing is in contact with the panel surface... The end face of the plug housing will reflect the detected light beam back to the receiver of the optical sensor. The optical sensor calculates the distance based on the intensity of the received reflected light. It outputs a distance detection signal to the MCU control unit through the signal output terminal.

[0071] distance The calculation method is as follows:

[0072]

[0073] in, To increase the intensity of emitted light, In order to receive the intensity of reflected light, These are calibration coefficients (obtained through factory calibration). This is the environmental compensation index (used to compensate for the impact of environmental factors such as temperature and humidity on detection accuracy). Alternatively, the distance can be obtained by looking up a pre-stored emitted light intensity-received light intensity calibration curve. .

[0074] Example 4: Figure 3 As shown, this embodiment takes the insertion of a two-hole plug into a two-hole socket unit as an example, and its working process is as follows:

[0075] Step S1: The user simultaneously inserts the two prongs of the two-prong plug into the two-hole socket unit. The two prongs simultaneously push against their corresponding baffles, each baffle moving independently and triggering its corresponding trigger switch to the ON state. The MCU control unit records the triggering time of each trigger switch and calculates the triggering time difference Δt between the first and last trigger switches in the same socket group. Since the two prongs are inserted synchronously, Δt ≤ Tsync (Tsync = 20ms), which is considered a normal plug insertion.

[0076] Step S2: The MCU control unit sends a wake-up signal to the enable terminal of the light sensor through the first signal output terminal, and the light sensor enters the working state.

[0077] Step S3: The light sensor emits a detection beam outward from the panel to detect the distance between the end face of the plug housing and the panel surface. .like ≤ ( =1mm), which is considered a valid plug insertion; if > If the plug is not properly inserted, keep the socket group powered off.

[0078] Step S4: After determining that the plug is validly inserted, the MCU control unit starts a delayed power-on timer (the preset power-on delay time Ton can be configured by the user via a remote management terminal, such as 0.5 seconds to 2 seconds). After the timer reaches Ton, the MCU control unit sends a closing control signal to the corresponding relay switch unit, the relay switch unit closes, and the socket group receives power output.

[0079] Step S5: After the jack assembly receives power, the optical sensor remains operational and continuously detects the distance. .like Always ≤ Maintain normal power supply. > (If the plug is loose or disconnected), the MCU control unit immediately sends a disconnect control signal to the relay switch unit, de-energizing the socket group. When Restore to ≤ When the timer is activated, the delayed power-on timer is restarted, and power is restored after Ton.

[0080] Step S6: During the power output of the socket group, the current and power sampling circuit continuously samples the total load power. When Pload ≤ Pstandby (Pstandby = 0.5W) and continues to exceed Tstandby (Tstandby = 30 minutes), it is determined to be a low-power state such as the charger being unloaded. The MCU control unit controls the socket group to be powered off to achieve zero-power output.

[0081] Step S7: After the socket group automatically shuts off due to low power consumption, the MCU control unit periodically outputs a weak detection pulse (a short-duration low-voltage pulse, with a pulse duration of <50ms, less than the power-on duration corresponding to the human body's safe electric shock threshold), and simultaneously detects the distance using a light sensor. .like ≤ The system determines that the plug remains in place, retains its configuration memory, and automatically restores power after Ton when the load connection conditions are met (e.g., the user reconnects their phone), without needing to unplug and replug it. > If the plug is found to be unplugged, the configuration memory is cleared and the light sensor is restored to standby and hibernation mode.

[0082] Example 5: Figure 4 As shown, when a foreign object (such as a metal wire) is inserted into a single socket:

[0083] The MCU control unit detects only one trigger signal from the trigger switch (less than two pins), and directly determines that a foreign object has been inserted.

[0084] The light sensor remains in standby sleep mode and does not emit a detection beam.

[0085] The relay switch unit remains in the open state, the socket group is completely de-energized, and there is no power output.

[0086] The MCU control unit sends an alarm trigger signal to the audible and visual alarm unit to trigger a local audible and visual alarm; at the same time, it reports the foreign object intrusion event to a remote management terminal (such as a mobile APP) through the wireless communication module.

[0087] Example 6: Abnormal Workflow Due to Plug Not Being Inserted Properly

[0088] The user inserted the plug into the socket assembly, but not fully (the plug housing end face was not in contact with the panel surface):

[0089] The insertion of the pins satisfies the condition that at least two pins are inserted simultaneously, and each baffle normally triggers the closing of each trigger switch.

[0090] The MCU control unit sends a wake-up signal to the light sensor, and the light sensor enters the working state.

[0091] Light sensor detection distance Because the plug was not fully inserted, > .

[0092] The MCU control unit determines that the plug is not properly inserted and keeps the socket group powered off.

[0093] The MCU control unit reports a "plug not properly inserted" warning event to the remote management terminal.

[0094] Example 7: The power strip is installed vertically, and the plug gradually sinks under the influence of gravity.

[0095] After the plug is properly inserted and power is applied after a delay, the power strip normally supplies power to the load, and the optical sensor continuously monitors the distance. .

[0096] The plug gradually sank under the influence of gravity. The gap gradually increases from the initial fit (e.g., 0.5mm).

[0097] when > Furthermore, if the loosening confirmation time Tloose is exceeded for more than 100ms, the MCU control unit immediately sends a disconnect control signal to the relay switch unit, and the socket group is de-energized without waiting for Tloose.

[0098] The user pushes the plug back into the power strip until it fits snugly. ≤ The MCU control unit restarts the delayed power-on timer, and power is automatically restored after Ton.

[0099] Example 8: Users can perform the following operations through a mobile APP (remote management terminal):

[0100] Users can remotely modify the preset power-on delay time Ton (e.g., from 1 second to 0.5 seconds) or the preset standby confirmation time Tstandby (e.g., from 30 minutes to 15 minutes). The updated parameters are stored in the MCU control unit's memory for subsequent steps.

[0101] Users can remotely control the power supply to a specific group of sockets or all groups of sockets, such as remotely turning off the power to all groups of sockets when leaving home.

[0102] Users can remotely view energy consumption statistics for each socket group, including cumulative power consumption, real-time power, and historical power consumption curves. The energy consumption data is derived from continuous sampling by the current and power sampling circuit and stored in the memory unit of the MCU control unit.

[0103] Example 9: Figure 5As shown, the power input terminal is connected to the mains power via a power cord, and its output terminal is connected to the main power supply line and the input terminal of the power module, respectively.

[0104] The input terminal of the main power supply line is connected to the power input terminal, and its output terminal is connected to the input terminal of each group of relay switch units.

[0105] The output terminal of each relay switch unit is connected to the power supply circuit (live wire spring) of the corresponding socket assembly.

[0106] The input terminal of the power module is connected to the power input terminal, and its output terminal (VCC) is connected to the power supply terminal of the MCU control unit, the power supply terminal of the optical sensor, and the power supply terminal of the wireless communication module, respectively.

[0107] One end of each trigger switch is connected to a general purpose input / output (GPIO) port of the MCU control unit, and the other end is grounded. When the trigger switch is closed, the corresponding GPIO port of the MCU control unit detects a low-level signal.

[0108] The enable pin of the optical sensor is connected to the first GPIO output port of the MCU control unit, and the signal output pin is connected to the analog-to-digital converter (ADC) input pin of the MCU control unit.

[0109] The control terminals of each relay switch unit are connected to the corresponding GPIO output ports of the MCU control unit.

[0110] The current and power sampling circuit is located on the main power supply line, and its signal output terminal is connected to the ADC input terminal of the MCU control unit.

[0111] The wireless communication module's data interface (UART or SPI) establishes a bidirectional data communication connection with the MCU control unit's communication interface.

[0112] The timing module and storage unit of the MCU control unit are electrically connected via an on-chip bus.

[0113] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A safety control method for an intelligent power strip, characterized in that, Includes the following steps: Step 1: Detect the number of plugs inserted and the time difference between insertions within the same socket group. Based on the number of insertions and the time difference between insertions, as well as a preset synchronization time window threshold, determine whether the insertion behavior of the socket group is a normal plug insertion or a foreign object insertion. If it is a foreign object insertion, keep the socket group powered off. Step 2: After determining that the plug is inserted normally, the light sensor corresponding to the socket group is activated. The light sensor detects the distance between the plug shell and the power strip panel. Based on the comparison result of the distance and the preset contact distance threshold, it is determined whether the plug is inserted effectively. Step 3: After determining that the plug is validly inserted, the socket group is powered on and outputs power after a preset power-on delay time; Step 4: During the power output of the socket group, the distance is continuously detected by the light sensor, and the power to the socket group is controlled to be turned on and off based on the comparison result between the distance and the preset contact distance threshold. Step 5: During the power output of the socket group, continuously sample the load power of the output circuit of the socket group. When the load power is less than or equal to the preset standby power threshold and continues to exceed the preset standby confirmation time, control the socket group to cut off the power. Step 6: After the socket group is powered off, it periodically outputs weak detection pulses and detects the distance through the optical sensor. Based on the distance, it determines whether the plug is in place. If it is in place, the configuration memory is retained and the power supply is automatically restored when the load connection conditions are met. If it has been unplugged, the configuration memory is cleared and the optical sensor is restored to standby sleep state.

2. The safety control method for intelligent power strips according to claim 1, characterized in that, In step 1, if it is detected that the number of pins inserted in the same socket group is less than two, it is determined to be a foreign object insertion. If two or three pins are detected inserted in the same socket group, the insertion time of each pin is recorded, and the insertion time difference between the first and last detected pin is calculated. If the insertion time difference is greater than the preset synchronization time window threshold, it is determined to be foreign object insertion; If the insertion time difference is less than or equal to the preset synchronization time window threshold, it is determined to be a normal plug insertion.

3. The safety control method for intelligent power strips according to claim 1, characterized in that, In step 2, the optical sensor is in standby sleep mode by default and does not output detection signals; only after it is determined that a normal plug is inserted will a wake-up signal be sent to the optical sensor to make the optical sensor enter the working state. After the optical sensor enters the working state, it emits a detection beam to the outside of the power strip panel and receives the reflected light reflected back from the end face of the plug housing. If the distance is less than or equal to the preset fitting distance threshold, the plug is determined to be effectively inserted. If the distance is greater than the preset contact distance threshold, it is determined that the plug is not effectively inserted, and the socket group is kept off power.

4. The safety control method for intelligent power strips according to claim 1, characterized in that, In step 3, after the socket group is powered on, the optical sensor remains operational and continuously detects the distance.

5. The safety control method for intelligent power strips according to claim 1, characterized in that, In step 4, when the distance is greater than the preset contact distance threshold, it is determined that the plug has become loose or fallen off, and the power to the socket group is immediately cut off. When the distance recovers to less than or equal to the preset fitting distance threshold, the delayed power-on timing is restarted, and after the preset power-on delay time, the socket group is controlled to resume power supply.

6. The safety control method for intelligent power strips according to claim 1, characterized in that, It also includes remote management steps: Receive configuration or control commands from the remote management terminal via the wireless communication module and perform at least one of the following operations: (a) Update the preset power-on delay time or preset standby confirmation time according to the configuration instruction. (b) Remotely control the power supply to a specified socket group or all socket groups according to the control command; (c) Report the energy consumption statistics of the smart power strip to the remote management terminal according to the control command.

7. The safety control method for intelligent power strips according to claim 1, characterized in that, In step 4, when the distance is greater than the preset fitting distance threshold and continues to exceed the preset loosening confirmation time, a local audible and visual alarm is triggered or a loosening alarm event is reported to the remote management terminal, and then the socket group is powered off.

8. A safety control system for an intelligent power strip, characterized in that, The safety control method according to any one of claims 1 to 7 comprises: The main body of the power strip has several sets of socket components arranged side by side on its panel, and each set of socket components is powered independently. A power input terminal is located on the main body of the power strip and is used to connect to mains power. The power module is located inside the power strip body and is electrically connected to the power input terminal, used to provide operating voltage for each electrical component of the system. A resettable baffle is provided behind each socket of each socket assembly, and the baffles corresponding to each socket are set independently. A trigger switch is installed inside the power strip body and located on the displacement path of the resettable baffle, switching the on / off state as the resettable baffle moves. Each set of socket components is equipped with a reflective photoelectric sensor, which is installed on the inside of the power strip panel to detect the distance between the plug shell and the power strip panel. The photoelectric sensor is in standby sleep mode by default and is only awakened to work mode after the trigger switch is switched to the conduction state. A relay switch unit, corresponding one-to-one with each of the aforementioned socket assemblies, is connected in series in the power supply circuit of the corresponding socket assembly and is used to independently control the power on and off of each group of socket assemblies. A current and power sampling circuit is located on the main power supply line inside the power strip body, and is used to sample the total load power of the smart power strip. The MCU control unit is electrically connected to the trigger switch, the light sensor, each of the relay switch units, the current power sampling circuit, and the wireless communication module, respectively, and is used to execute the method steps of any one of claims 1 to 7; The wireless communication module establishes a bidirectional data communication connection with the MCU control unit for data interaction with the remote management terminal.

9. The safety control system according to claim 8, characterized in that, The resettable baffle is an elastic reset baffle. After the pin is pulled out, the baffle corresponding to each socket returns to its initial position by elastic force, and the trigger switch returns to the off state synchronously.

10. The safety control system according to claim 8, characterized in that, The MCU control unit includes a timing module and a storage unit; The storage unit is used to store the following control parameters: the preset power-on delay time, the preset standby power threshold, and the preset standby confirmation time; The storage unit is also used to store the configuration memory of each socket group and the energy consumption statistics.

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