Anti-electric shock fountain system and management method

Abstract

The invention provides an anti-electric shock fountain system and a management method. The system comprises a water spraying unit in a fountain pool, a power supply of the water spraying unit, and an active protection chain composed of an underwater laser detection unit, a laser emission terminal, a control unit and a power supply control unit. The underwater laser detection unit is arranged below the water surface around the water spraying unit, and laser signals emitted by the underwater laser detection unit are folded back through the pool wall laser emission terminal to form an annular closed detection light path surrounding the water spraying unit; the control unit monitors the on-off state of the light path and outputs a control signal when the light path is blocked; the power supply control unit responds to the signal and immediately cuts off a water spraying unit power supply loop. Personnel invasion is actively perceived through an underwater light path, a power supply is quickly cut off before an electric shock risk occurs, and the problem of lagging of traditional leakage protection is solved; water mist interference is avoided through underwater detection, dead-corner-free protection is achieved through annular layout, and safe anti-electric-shock measures are provided for a fountain area.

Description

Technical Field

[0001] This invention relates to the field of safety protection technology, and in particular to a fountain system and management method for preventing electric shock. Background Technology

[0002] Fountain systems, as common landscaping and recreational facilities, are widely used in public places such as squares, parks, and communities. Their operation relies on electrically powered water spray devices (such as water pumps and lights) installed within the pool, which are typically driven by AC mains power or converted DC power. Due to the conductive nature of the water in the fountain pool, fountain systems face long-term potential risks of leakage and electric shock.

[0003] Currently, electric shock protection for fountains mainly relies on traditional residual current devices (RCDs) (such as residual current circuit breakers). This type of technology falls under the category of reactive protection; its working principle is to automatically cut off the power supply when a leakage current occurs in the electrical circuit or equipment and reaches a set threshold. However, this protection method has significant limitations:

[0004] First, there is a brief delay between the occurrence of leakage and the activation of the protection device. During this instant, a dangerous voltage may already exist in the pool water, posing a direct threat to personnel entering the water. Second, the system cannot provide effective protection when the leakage current does not reach the activation threshold or when the protection device malfunctions. More importantly, it is completely unable to prevent electric shock accidents caused by personnel accidentally entering a live area while the fountain is operating normally and there is no leakage, such as by directly contacting or getting too close to a live water spray unit.

[0005] Furthermore, fountain water levels can fluctuate due to evaporation, overflow, or rainfall. Excessively high water levels may submerge electrical components that should be dry, significantly increasing the risk of electrical leakage; conversely, excessively low water levels may expose live components that should be covered by water, creating safety hazards. Existing systems often lack integrated monitoring and response mechanisms for water level status.

[0006] In summary, existing technical solutions suffer from shortcomings such as passive protection, reliance on electrical parameters alone, lack of prevention against active human intrusion, and insufficient consideration of environmental factors. Therefore, there is an urgent need for a fountain system safety protection solution capable of proactive early warning, multi-level response, and intelligent judgment based on environmental conditions, in order to upgrade public safety from passive power outages to proactive protection. Summary of the Invention

[0007] In view of the shortcomings of the prior art, the present invention provides a fountain system and management method that prevents electric shock, which solves the problem of how to overcome environmental interference, achieve safety protection and facilitate installation and adaptation.

[0008] According to an embodiment of the present invention, a fountain system for preventing electric shock includes a plurality of water spray units disposed in a fountain pool and a power supply for supplying power to the water spray units, and further includes:

[0009] An underwater laser detection unit is disposed around the water spray unit and below the water surface, and is used to receive laser signals to form a ring detection area around the water spray unit;

[0010] An underwater laser emitting strip is installed along the inner wall of the fountain pool where electric shock prevention monitoring is required, and is located below the water surface. It emits laser signals directionally towards the underwater laser detection unit.

[0011] The underwater laser emitting strip consists of multiple laser emitting terminals and a laser generator. The laser generator is connected to the main optical fiber link, and the main optical fiber link is provided with several optical fiber branch links that are connected to each laser emitting terminal.

[0012] The control unit is electrically connected to the underwater laser detection unit and outputs a corresponding control signal based on the detection signal output by the underwater laser detection unit.

[0013] The power control unit is connected in the power supply circuit between the power source and the water spray unit. Its control terminal is connected to the control signal output terminal of the control unit, and it cuts off the power supply circuit in response to the control signal.

[0014] As a further solution, the underwater laser detection unit includes:

[0015] An annular mounting base is positioned below the water surface and fixed to the water spray unit by an adjustable collar.

[0016] Multiple laser receivers are distributed circumferentially along the annular mounting base. Each laser receiver receives a laser signal emitted by a corresponding laser emitting terminal and forms an annular detection area surrounding the water spray unit between the inner walls of the fountain pool. The laser receivers are waterproofly encapsulated by a light-transmitting material shell.

[0017] A laser detection circuit is connected to each laser receiver. It determines the on / off state of the annular detection area based on the on / off status of the laser signal and generates an intrusion signal when there is a disconnection in the laser signal.

[0018] The leakage current detection module is used to detect the leakage current status in the fountain pool and send a leakage current signal through the leakage current signal output terminal when a leakage current status is detected.

[0019] As a further solution, the laser detection circuit includes several laser detection units, each comprising an OR gate array, an optocoupler array, and a terminal array; wherein,

[0020] The OR gate array is composed of multiple cascaded OR gates, and the output terminal of the cascaded final OR gate is used as the intrusion signal output terminal. The optocoupler array is composed of several optocouplers and is electrically connected to the input terminals of each OR gate in the cascaded primary stage. One end of the terminal array is electrically connected to the optocoupler array, and the other end is electrically connected to the laser receiver.

[0021] As a further solution, the power control unit includes an AC power distribution switch and a DC power distribution switch; wherein,

[0022] The AC power distribution switch is located between the mains power supply and the distribution box, which is electrically connected to the power source. The DC power distribution switch is located between the power source and the water spray unit.

[0023] As a further solution, the control unit is a multi-level switching control unit, including a first NOR gate flip-flop and a second NOR gate flip-flop; wherein,

[0024] The input terminal of the first NOR gate flip-flop is electrically connected to the output terminal of the intrusion signal, and the output terminal of the first NOR gate flip-flop is electrically connected to the trigger terminal of the DC power distribution switch.

[0025] The input terminal of the second NOR gate flip-flop is electrically connected to the output terminal of the leakage current signal, and the output terminal of the second NOR gate flip-flop is electrically connected to the trigger terminal of the AC power distribution switch.

[0026] As a further solution, a multi-level water level detection unit is also provided, which includes high water level detection points, low water level detection points, high water level signal points, and low water level signal points; wherein,

[0027] The high water level detection point and the low water level detection point are respectively set at the high water level and the low water level in the fountain pool. The high water level signal point is electrically connected to the input terminal of the second NOR gate flip-flop, and the low water level signal point is electrically connected to the input terminal of the first NOR gate flip-flop.

[0028] As a further solution, a multi-level audible and visual alarm module is also provided, which has a first-level alarm trigger terminal and a second-level alarm trigger terminal; wherein, the first-level alarm trigger terminal is electrically connected to the output terminal of the second NOR gate flip-flop, and the second-level alarm trigger terminal is electrically connected to the output terminal of the first NOR gate flip-flop.

[0029] As a further solution, a region image detection unit and a switching potential adjustment unit are also included; among them,

[0030] The area image detection unit is used to detect area images within the fountain pool area, and the active switch adjustment unit is used to actively adjust the on / off state of the AC power distribution switch and the DC power distribution switch.

[0031] On the other hand, the present invention also provides a method for managing an electric shock-proof fountain system, applicable to an electric shock-proof fountain system as described in any of the preceding claims, wherein control and correction are performed through the following steps:

[0032] Regional images within the fountain pool area are obtained based on the regional image detection unit;

[0033] Personnel image detection and recognition based on regional images within the fountain pool area;

[0034] Alarm false triggering is determined based on personnel image detection and recognition results, and the on / off status of AC and DC power distribution switches; among which,

[0035] If the personnel image detection identifies an intruder within the circular detection area, but the DC power distribution switch is not disconnected, the DC power distribution switch will be disconnected through the active switch adjustment unit.

[0036] If the personnel image detection identifies no intruders within the ring detection area, but the DC power distribution switch is open, the DC power distribution switch will be reconnected via the active switch adjustment unit.

[0037] As a further solution, the following steps are taken to prevent false alarms from being triggered during the operation of the fountain unit:

[0038] Obtain the operating mode of the fountain unit and ensure that no personnel intrude into the fountain pool;

[0039] The fountain unit is controlled to operate in working mode and to acquire intrusion signals in real time;

[0040] The acquired intrusion signals are aligned and bound to the working mode on the timeline to obtain an alarm false trigger correction file;

[0041] Obtain the current operating mode of the fountain unit and the corresponding alarm false trigger correction file;

[0042] The DC power distribution switch is controlled by negative feedback through the alarm false trigger correction file to shield the alarm false triggers generated during the operation of the fountain unit.

[0043] Compared with the prior art, the present invention has the following beneficial effects:

[0044] This invention uses an underwater laser detection unit to detect intrusion in real time and proactively. Before personnel may come into contact with electrified water, the power control unit cuts off the dangerous power source in advance. Compared with existing technologies that mainly rely on downstream electrical protection devices such as leakage current protectors, which have action thresholds and response delays, this invention achieves a shift from post-event remediation to pre-event prevention, fundamentally eliminating the conditions for electric shock accidents.

[0045] This invention addresses the severe interference of water mist and spray on photoelectric signals in fountain environments by placing the detection optical path within the same aquatic medium below the water surface. The relatively stable aquatic medium effectively avoids scattering and attenuation of the optical path by airborne water mist, rain, dust, etc., ensuring the stability and reliability of signal transmission. This system can achieve long-term, stable, and reliable monitoring in the complex and dynamic environment of fountains where they operate frequently.

[0046] This invention establishes an invisible optical warning circle by constructing a ring-shaped detection optical path around the water spray unit. Regardless of the direction from which a person enters the fountain area, their intrusion will inevitably block the corresponding optical path, thus being detected by the system. This layout is naturally adaptable to various fountain pool shapes, including circular and irregular shapes, achieving comprehensive coverage and no blind spots without requiring complex sensor array designs for different pool shapes. Furthermore, the non-contact optical detection method requires no modification to the pool structure or the installation of physical barriers, making it aesthetically pleasing and maintenance-free.

[0047] In summary, this invention systematically solves the key problems of traditional fountains in terms of passive protection against electric shock, false alarms due to environmental interference, blind spots in protection, and dangerous rescue environments, and provides a brand-new, inherently safe systemic solution for preventing electric shock to fountains. Attached Figure Description

[0048] Figure 1 A layout diagram of an anti-electric shock fountain system within a fountain pool, provided as an embodiment of the present invention;

[0049] Figure 2 This is a schematic diagram of the underwater laser detection unit provided in an embodiment of the present invention;

[0050] Figure 3 This is a schematic diagram of the zoned protection layout of the anti-electric shock fountain system provided in an embodiment of the present invention;

[0051] Figure 4 This is a schematic diagram of the fountain system in an embodiment of the present invention when an intrusion is detected;

[0052] Figure 5 This is a schematic diagram of the installation of the underwater laser detection unit provided in an embodiment of the present invention;

[0053] Figure 6This is a logic diagram of a laser detection circuit provided in an embodiment of the present invention;

[0054] Figure 7 A schematic diagram of the circuit structure of the power control unit provided in an embodiment of the present invention;

[0055] Figure 8 A schematic diagram of the circuit structure of the multi-level switch control unit provided in an embodiment of the present invention;

[0056] Figure 9 This is a schematic diagram of the structure of the multi-stage water level detection unit provided in an embodiment of the present invention;

[0057] Figure 10 This is a flowchart illustrating the steps of a fountain system management method for preventing electric shock, as provided in an embodiment of the present invention. Detailed Implementation

[0058] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0059] This application provides a fountain system that prevents electric shock. Its core is to monitor personnel intrusion in real time through active laser detection technology, and combine it with leakage detection, water level monitoring and other means to achieve multi-level and graded intelligent safety protection.

[0060] Example 1

[0061] like Figure 1 and Figure 2 As shown, the fountain system of this application mainly includes several water spraying units installed in the fountain pool, a power supply for powering the water spraying units, an underwater laser emitting belt, an underwater laser detection unit, and also includes a control unit and a power control unit, which together constitute a closed-loop safety protection system.

[0062] An underwater laser detection unit is disposed around the water spray unit and below the water surface, and is used to receive laser signals to form a ring detection area around the water spray unit;

[0063] An underwater laser emitting strip is installed along the inner wall of the fountain pool where electric shock prevention monitoring is required, and is located below the water surface. It emits laser signals directionally towards the underwater laser detection unit.

[0064] The underwater laser emitting strip consists of multiple laser emitting terminals and a laser generator. The laser generator is connected to the main optical fiber link, and the main optical fiber link is provided with several optical fiber branch links that are connected to each laser emitting terminal.

[0065] The control unit is electrically connected to the underwater laser detection unit and outputs a corresponding control signal based on the detection signal output by the underwater laser detection unit.

[0066] The power control unit is connected in the power supply circuit between the power source and the water spray unit. Its control terminal is connected to the control signal output terminal of the control unit, and it cuts off the power supply circuit in response to the control signal.

[0067] In this embodiment, the underwater laser emitting strip is laid on the inner wall of the fountain pool where electric shock monitoring is required, and the installation position is below the normal water level. (Reference) Figure 2 The laser emission strip consists of a laser generator, a main fiber optic link, several fiber optic branch links, and multiple laser emission terminals. The laser generator serves as the light source, producing a stable and continuous laser beam. This beam is coupled into the main fiber optic link for transmission. The main fiber optic link is laid out along the contour of the pool wall. At locations where detection points need to be set, fiber optic branch links are connected via fiber optic splitters. Each branch link ends in a laser emission terminal. These laser emission terminals are precisely oriented and fixed so that the emitted laser beam is horizontally directed towards the central area of ​​the fountain pool, aiming at the corresponding underwater laser detection unit.

[0068] like Figure 3 As shown, we laid underwater laser emission strips on the inner wall of the fountain pool where electric shock monitoring is required, thus forming a detection range for the areas to be monitored (the shoreline and areas where people are on the artificial hill). Areas not requiring monitoring (the inner water area and behind the artificial hill) do not need to be covered; for example... Figure 4 As shown, when an intruding object appears in the shore area, it blocks the underwater laser, thus the device detects the link interruption and cuts off the power supply to the fountain unit to prevent people from being electrocuted.

[0069] like Figure 5 As shown, the underwater laser detection unit is fixed to the housing of the water jet unit via an adjustable mounting ring. The annular mounting base is a rigid, waterproof structure, and its inner diameter is adjustable via the adjustable ring, allowing it to securely surround and fix to the housing of the water jet unit (such as the pump body or water pipe of a submersible pump). During installation, it is necessary to ensure that the entire base is below the water surface where the fountain is operating normally. Multiple laser receivers are distributed along the circumference of the annular mounting base. Each laser receiver's photosensitive window is covered by a waterproof cover made of a light-transmitting material to ensure normal operation underwater. The orientation of each laser receiver is precisely calibrated to correspond one-to-one with a laser emitting terminal laid on the inner wall of the fountain pool. When the optical paths between all laser emitting terminals and all laser receivers are unobstructed, these intersecting beams form a continuous, invisible, and dense annular detection area or laser fence between the water jet unit and the pool wall.

[0070] The laser detection circuit is integrated into a waterproof cavity inside the ring-shaped mounting base and is connected to each laser receiver via cables to monitor the status of all laser channels in real time. No intrusion is determined, and the circuit outputs a low level, only when all laser receivers simultaneously receive a stable laser signal. If any one or more laser receivers lose their laser signal (i.e., the optical path is blocked by a human body, large object, etc.), the circuit logic immediately flips, generating a high-level intrusion signal at its intrusion signal output terminal. At this point, the integrity of the ring-shaped detection area is compromised, indicating an intrusion has occurred.

[0071] The leakage current detection module, in this embodiment, typically employs a high-sensitivity leakage current sensor, with its detection head submerged in water. It continuously monitors leakage current in the fountain pool water or electrical circuits. When the detected leakage current value exceeds a preset safety threshold, its leakage signal output immediately transitions from low to high, generating a leakage alarm signal. In summary, this underwater laser detection unit integrates both optical intrusion detection and electrical safety detection functions. On one hand, it actively detects intrusion through the physical boundary formed by the laser beam; on the other hand, it passively monitors leakage hazards through electrical measurements.

[0072] like Figure 6 As shown, the laser detection circuit includes several laser detection units, each of which includes an OR gate array, an optocoupler array, and a terminal array. The OR gate array is composed of multiple cascaded OR gates, with the output of the final cascaded OR gate serving as the intrusion signal output endpoint. The optocoupler array is composed of several optocouplers, each electrically connected to the input of one of the cascaded primary OR gates. One end of the terminal array is electrically connected to the optocoupler array, and the other end is electrically connected to the laser receiver.

[0073] It should be noted that each laser detection unit includes a terminal array, an optocoupler array, and an OR gate array. The terminal array, serving as the physical interface of the circuit, connects to the underwater laser receiver via a waterproof cable. Each terminal in the array corresponds to a signal output line of the laser receiver, responsible for receiving the current signal reflecting the on / off state of the optical path. The optocoupler array consists of several optocouplers. The input terminal of each optocoupler connects to a corresponding terminal in the terminal array, receiving the signal from the laser receiver. The optocouplers play a crucial role in electrical isolation: completely isolating the underwater laser receiver's circuit from the main control circuit, effectively preventing interference and damage to the main control circuit from water vapor, corrosion, or potential differences, greatly improving the system's reliability and safety. When the laser signal is normal, the laser receiver conducts, driving the LED inside the optocoupler to emit light, thereby turning on the transistor at the optocoupler's output terminal, outputting a low level; when the laser is blocked, the optocoupler output terminal becomes high.

[0074] An OR gate array is composed of multiple cascaded dual-input OR gate chips. The inputs of the first-stage OR gates (i.e., the cascaded primary OR gates) are electrically connected to the outputs of the corresponding optocouplers in the optocoupler array. Each OR gate monitors the output status of two optocouplers. The output of the first-stage OR gate then serves as the input to the next-stage OR gate, and so on, merging stage by stage until the status of all channels is finally collected by the final OR gate in the cascaded final stage. The output of this final OR gate is the intrusion signal output endpoint of the entire laser detection circuit. In the absence of intrusion, all laser paths are open, and the outputs of all optocouplers are low, resulting in low outputs for each stage OR gate. At this time, the intrusion signal output endpoint remains low, indicating safety. Once any laser path is blocked by an intruder, the corresponding optocoupler output flips to a high level. This high-level signal propagates along the cascaded OR gates, ultimately forcing the output of the final cascaded OR gate (i.e., the intrusion signal output endpoint) to immediately jump to a stable high level, thus generating a valid intrusion signal.

[0075] Optical isolation is used to effectively resist electrical interference in the underwater environment. The hardware logic based on OR gate cascade defines the judgment principle that any interruption of any channel represents an intrusion. It is simple, reliable and not prone to errors. If the number of monitoring laser beams needs to be increased, the cascade scale of optical couplers and extended OR gate arrays can be increased accordingly, with a high degree of modularity.

[0076] like Figure 7 As shown, the power control unit includes an AC power distribution switch and a DC power distribution switch; wherein, the AC power distribution switch is located between the mains power and the distribution box, the distribution box is electrically connected to the power supply, and the DC power distribution switch is located between the power supply and the water spray unit.

[0077] In this embodiment, the power control unit includes two independent switches with different protection depths: an AC distribution switch and a DC distribution switch, which respond to different levels of hazard signals. The AC distribution switch is installed between the mains power input and the fountain system's distribution box, controlling the total AC power supply to the entire fountain system. When this switch is open, the power supply to the entire fountain system is completely cut off. The DC distribution switch is connected in series in the DC power supply circuit that leads from the distribution box and supplies power to specific water spray units. When this switch is open, only the DC operating power supply to the specific water spray unit or its branch is cut off, while the system's main control circuit, lighting, or other AC circuits may still be powered.

[0078] Normal power supply path: AC mains power is connected to the distribution box via an AC distribution switch. Inside the distribution box, some electrical energy is converted into low-voltage DC power to form a power source. This DC power source is then transmitted to each water spray unit via a DC distribution switch to drive its normal operation.

[0079] Hierarchical response execution:

[0080] Level 1 Power Failure: When the control unit determines that there is a potential danger such as personnel intrusion or low water level, it will send a trigger signal to the control terminal of the DC power distribution switch. The DC power distribution switch will immediately act, cutting off the DC power supply to its branch, causing the corresponding sprinkler unit to stop working, and quickly eliminating the risk of electric shock to sprinkler equipment that personnel may directly contact.

[0081] Level 2 Power Outage: When the control unit detects an emergency hazard such as leakage or high water level, it sends a trigger signal to the control terminal of the AC power distribution switch. The AC power distribution switch immediately activates, cutting off the main AC power supply to the distribution box. This completely disconnects all power input to the fountain system, including both AC and DC sides, fundamentally eliminating any risk of electric shock in the entire pool area.

[0082] The Level 1 response only cuts off the power to the direct source of risk, avoiding unnecessary shutdown of lighting or control functions in unrelated areas and preventing secondary chaos or accidents that may be caused by a sudden power outage, especially at night. The Level 2 response, as the final safety barrier, ensures absolute safety in the event of the most dangerous electrical fault. The configuration of an AC main switch and DC branch switches conforms to the principle of multi-level power distribution protection, improving the electrical safety of the system itself.

[0083] like Figure 8 As shown, the control unit is a multi-stage switch control unit, including a first NOR gate trigger and a second NOR gate trigger; wherein, the input terminal of the first NOR gate trigger is electrically connected to the intrusion signal output terminal, and the output terminal of the first NOR gate trigger is electrically connected to the trigger terminal of the DC power distribution switch; the input terminal of the second NOR gate trigger is electrically connected to the leakage signal output terminal, and the output terminal of the second NOR gate trigger is electrically connected to the trigger terminal of the AC power distribution switch.

[0084] It should be noted that the first NOR gate flip-flop is responsible for handling the first-level response event: its set input is directly electrically connected to the intrusion signal output terminal of the laser detection circuit. When a high-level intrusion signal is received, the flip-flop is set, and its output flips from low to high. The output terminal is directly connected to the trigger terminal of the DC power distribution switch, thereby driving the DC power distribution switch to operate and cut off the DC power supply to the sprinkler unit.

[0085] The second NOR gate flip-flop is used to handle secondary response events: its set input is directly electrically connected to the leakage signal output terminal of the leakage current detection module. When a high-level leakage current signal is received, the flip-flop is set, and its output flips from low to high. The output terminal is directly connected to the trigger terminal of the AC power distribution switch, thereby driving the AC power distribution switch to operate and cut off the main AC power supply of the system.

[0086] The two triggers work in parallel, independently monitoring two different types of hazards: intrusion and leakage. This avoids signal cross-interference. The hardware triggers have a response speed in the microsecond range, with no software delay or risk of crashing, which greatly meets the stringent requirements of security protection for immediacy.

[0087] Furthermore, such as Figure 9 As shown, a multi-level water level detection unit is also provided, which includes a high water level detection point, a low water level detection point, a high water level signal point, and a low water level signal point. The high water level detection point and the low water level detection point are respectively located at the high water level and the low water level in the fountain pool. The high water level signal point is electrically connected to the input terminal of the second NOR gate flip-flop, and the low water level signal point is electrically connected to the input terminal of the first NOR gate flip-flop.

[0088] The system utilizes a multi-level water level detection unit to monitor and respond to abnormal environmental water levels. The high-water-level detection point employs a single water level sensor or a pair of detection electrodes, fixedly installed inside the fountain pool wall. Its detection surface is positioned at a pre-set maximum safe operating water level (usually below the pool edge, with a safety margin). The low-water-level detection point also uses a water level sensor or detection electrodes, fixedly installed inside the pool wall. Its detection surface is positioned at a pre-set minimum safe operating water level (above the water intake of the fountain equipment or the minimum water level required to completely submerge the equipment). When the pool water level reaches or exceeds the high-water-level detection point, this point outputs a high-level high-water-level alarm signal; when the pool water level drops or falls below the low-water-level detection point, this point outputs a high-level low-water-level alarm signal.

[0089] Specifically, the high water level signal point is electrically connected to the input of the second NOR gate trigger. If the water level is too high (e.g., due to heavy rain or water replenishment failure), it will be considered a top-level hazard, similar to electrical leakage, immediately triggering the second NOR gate trigger, which in turn will trip the AC power distribution switch, executing a secondary response (global power outage). This prevents extreme risks such as water level flooding of non-waterproof electrical interfaces and lighting fixtures, or water overflow causing electrification. The low water level signal point is electrically connected to the input of the first NOR gate trigger. If the water level is too low (e.g., due to leakage or evaporation), it will be considered a potential hazard requiring immediate intervention, similar to personnel intrusion, immediately triggering the first NOR gate trigger, which in turn will trip the DC power distribution switch, executing a primary response (partial power outage). This prevents live components that should be covered and cooled or insulated by water (such as water pump housings and underwater lamps) from being exposed to air due to a drop in water level, which could lead to overheating, increased risk of electric shock, or equipment damage from idling.

[0090] By introducing multi-level water level detection and integrating it into hierarchical control logic, the power supply can be preemptively cut off due to abnormal water levels (especially high water levels) before leakage actually occurs, extending protection from post-fault to pre-risk prevention. During normal system operation, the water level is between the high and low detection points, and both water level signal points output a low level. If continuous heavy rain causes the pool water to rise and reach the high water level detection point, the high water level signal point immediately outputs a high level, directly triggering a global power outage. If pool leakage causes the water level to drop below the low water level detection point, the low water level signal point outputs a high level, directly triggering a local power outage in that area. Management personnel can quickly determine whether the problem is a water level issue, an intrusion, or a leakage issue based on different alarm indications, and thus take targeted measures.

[0091] Furthermore, a multi-level audible and visual alarm module is provided, which has a first-level alarm trigger terminal and a second-level alarm trigger terminal; wherein, the first-level alarm trigger terminal is electrically connected to the output terminal of the second NOR gate flip-flop, and the second-level alarm trigger terminal is electrically connected to the output terminal of the first NOR gate flip-flop.

[0092] It should be noted that the multi-level audible and visual alarm module consists of an independent alarm controller, audible and visual alarms of different specifications (such as buzzers, sirens, LED flashlights, rotating lights, etc.), and a drive circuit.

[0093] The first-level alarm trigger terminal receives the highest-level hazard trigger signal; the second-level alarm trigger terminal receives the next highest-level hazard trigger signal. The first-level alarm trigger terminal is electrically connected to the output of the second NOR gate flip-flop. Therefore, when a system leakage or high water level occurs (i.e., triggering the second flip-flop and executing a global power-off), the first-level alarm trigger terminal immediately receives a high-level signal. This signal will drive the alarm module to activate the first-level alarm. The first-level alarm is typically configured as the highest warning level, designed to immediately and strongly alert on-site personnel and administrators, indicating the existence of an urgent electrical or environmental hazard that could cause serious personal injury, requiring immediate evacuation and emergency response. The second-level alarm trigger terminal is electrically connected to the output of the first NOR gate flip-flop. Therefore, when personnel intrusion or a low water level is detected (i.e., triggering the first flip-flop and executing a partial power-off), the second-level alarm trigger terminal immediately receives a high-level signal. This signal will drive the alarm module to activate the second-level alarm. Level 2 alarms are typically configured as medium-level warnings, indicating that the safety system has initiated protective actions (such as a power outage in the area), suggesting that personnel have entered a restricted area or that there is an abnormal operating environment for the equipment (low water level), requiring attention and inspection, but the urgency of the danger is relatively low.

[0094] By directly mapping different levels of control signals, global power-off signals, and local power-off signals to different levels of alarm outputs, on-site personnel and administrators can quickly and accurately determine the nature and severity of an event based solely on audible and visual characteristics, without needing to consult complex instruments. This significantly shortens the judgment time. Before an intrusion occurs but before electric shock occurs, the sounding of the level two alarm itself serves as a powerful deterrent and reminder, prompting intruders to voluntarily and quickly leave the danger zone. This provides an additional effect of proactive prevention and significantly enhances its safety performance and management convenience in complex public environments.

[0095] Furthermore, as an even more advanced solution, a region image detection unit and a switching potential adjustment unit are also included; among them,

[0096] The area image detection unit is used to detect area images within the fountain pool area, and the active switch adjustment unit is used to actively adjust the on / off state of the AC power distribution switch and the DC power distribution switch.

[0097] Specifically, the functions of the above system are limited to the hardware, and it can only trigger alarms through circuit signals, which cannot cope with more complex usage situations. To this end, this embodiment sets up an area image detection unit and a switch potential adjustment unit, so that the system has the ability to actively control and detect images. Combined with a more specific fountain system management method, the whole system becomes more intelligent and accurate.

[0098] Example 2

[0099] Please see Figure 10 Based on the anti-electric shock fountain system provided in Example 1, this embodiment also provides an anti-electric shock fountain system management method, which performs control and correction through the following steps:

[0100] Regional images within the fountain pool area are obtained based on the regional image detection unit;

[0101] Personnel image detection and recognition based on regional images within the fountain pool area;

[0102] Alarm false triggering is determined based on personnel image detection and recognition results, and the on / off status of AC and DC power distribution switches; among which,

[0103] If the personnel image detection identifies an intruder within the circular detection area, but the DC power distribution switch is not disconnected, the DC power distribution switch will be disconnected through the active switch adjustment unit.

[0104] If the personnel image detection identifies no intruders within the ring detection area, but the DC power distribution switch is open, the DC power distribution switch will be reconnected via the active switch adjustment unit.

[0105] It should be noted that while fountain systems based on pure logic hardware circuits can prevent potential touch risks caused by human intrusion to a certain extent, they cannot make more detailed and intelligent distinctions between situations, often resulting in false alarms, such as the alarm being triggered by ornamental fish in the pool. To address this, this embodiment uses a regional image detection unit to detect images within the fountain pool area to determine whether the alarm trigger is truly caused by human intrusion. It also uses an active switch adjustment unit to actively control false alarms caused by non-human intrusion, ensuring the stable operation of the entire system.

[0106] Furthermore, the following steps are taken to prevent false alarms from being triggered during the operation of the fountain unit:

[0107] Obtain the operating mode of the fountain unit and ensure that no personnel intrude into the fountain pool;

[0108] The fountain unit is controlled to operate in working mode and to acquire intrusion signals in real time;

[0109] The acquired intrusion signals are aligned and bound to the working mode on the timeline to obtain an alarm false trigger correction file;

[0110] Obtain the current operating mode of the fountain unit and the corresponding alarm false trigger correction file;

[0111] The DC power distribution switch is controlled by negative feedback through the alarm false trigger correction file to shield the alarm false triggers generated during the operation of the fountain unit.

[0112] Specifically, during the operation of the fountain unit, many water jets are generated, which may interrupt the local laser link. However, since the operation of the fountain unit is fixed and predictable, we can obtain an alarm false trigger correction file by recording the intrusion signals that are falsely triggered according to the working mode of the fountain unit, and then aligning and binding them with the working mode on the time axis. In actual operation, the alarm false trigger correction file is used to correct and offset the actual false trigger intrusion signals recorded, thereby achieving the effect of correcting alarm false triggers.

[0113] Finally, it should be noted that 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 preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A fountain system designed to prevent electric shock, comprising a plurality of water spray units disposed within a fountain pool and a power supply for supplying power to the water spray units, characterized in that, Also includes: An underwater laser detection unit is disposed around the water spray unit and below the water surface, and is used to receive laser signals to form a ring detection area around the water spray unit; An underwater laser emitting strip is installed along the inner wall of the fountain pool where electric shock prevention monitoring is required, and is located below the water surface. It emits laser signals directionally towards the underwater laser detection unit. The underwater laser emitting strip consists of multiple laser emitting terminals and a laser generator. The laser generator is connected to the main optical fiber link, and the main optical fiber link is provided with several optical fiber branch links that are connected to each laser emitting terminal. The control unit is electrically connected to the underwater laser detection unit and outputs a corresponding control signal based on the detection signal output by the underwater laser detection unit. The power control unit is connected in the power supply circuit between the power source and the water spray unit. Its control terminal is connected to the control signal output terminal of the control unit, and it cuts off the power supply circuit in response to the control signal.

2. The fountain system for preventing electric shock according to claim 1, characterized in that, The underwater laser detection unit includes: An annular mounting base is positioned below the water surface and fixed to the water spray unit by an adjustable collar. Multiple laser receivers are distributed circumferentially along the annular mounting base. Each laser receiver receives a laser signal emitted by a corresponding laser emitting terminal and forms an annular detection area surrounding the water spray unit between the inner walls of the fountain pool. The laser receivers are waterproofly encapsulated by a light-transmitting material shell. A laser detection circuit is connected to each laser receiver. It determines the on / off state of the annular detection area based on the on / off status of the laser signal and generates an intrusion signal when there is a disconnection in the laser signal. The leakage current detection module is used to detect the leakage current status in the fountain pool and send a leakage current signal through the leakage current signal output terminal when a leakage current status is detected.

3. The anti-electric shock fountain system according to claim 2, characterized in that, The laser detection circuit includes several laser detection units, each comprising an OR gate array, an optocoupler array, and a terminal array; wherein... The OR gate array is composed of multiple cascaded OR gates, and the output terminal of the cascaded final OR gate is used as the intrusion signal output terminal. The optocoupler array is composed of several optocouplers and is electrically connected to the input terminals of each OR gate in the cascaded primary stage. One end of the terminal array is electrically connected to the optocoupler array, and the other end is electrically connected to the laser receiver.

4. A fountain system for preventing electric shock according to claim 1, characterized in that, The power control unit includes an AC power distribution switch and a DC power distribution switch; wherein... The AC power distribution switch is located between the mains power supply and the distribution box, which is electrically connected to the power source. The DC power distribution switch is located between the power source and the water spray unit.

5. A fountain system for preventing electric shock according to claim 3 or claim 4, characterized in that, The control unit is a multi-level switch control unit, including a first NOR gate flip-flop and a second NOR gate flip-flop; wherein, The input terminal of the first NOR gate flip-flop is electrically connected to the output terminal of the intrusion signal, and the output terminal of the first NOR gate flip-flop is electrically connected to the trigger terminal of the DC power distribution switch. The input terminal of the second NOR gate flip-flop is electrically connected to the output terminal of the leakage current signal, and the output terminal of the second NOR gate flip-flop is electrically connected to the trigger terminal of the AC power distribution switch.

6. A fountain system for preventing electric shock according to claim 5, characterized in that, It also includes a multi-level water level detection unit, which is equipped with high water level detection points, low water level detection points, high water level signal points, and low water level signal points; wherein, The high water level detection point and the low water level detection point are respectively set at the high water level and the low water level in the fountain pool. The high water level signal point is electrically connected to the input terminal of the second NOR gate flip-flop, and the low water level signal point is electrically connected to the input terminal of the first NOR gate flip-flop.

7. A fountain system for preventing electric shock according to claim 5, characterized in that, It is also equipped with a multi-level audible and visual alarm module, which has a first-level alarm trigger terminal and a second-level alarm trigger terminal; wherein, the first-level alarm trigger terminal is electrically connected to the output terminal of the second NOR gate flip-flop, and the second-level alarm trigger terminal is electrically connected to the output terminal of the first NOR gate flip-flop.

8. A fountain system for preventing electric shock according to claim 4, characterized in that, It also includes a region image detection unit and a switch potential adjustment unit; among which, The area image detection unit is used to detect area images within the fountain pool area, and the active switch adjustment unit is used to actively adjust the on / off state of the AC power distribution switch and the DC power distribution switch.

9. A method for managing a fountain system to prevent electric shock, applied to a fountain system to prevent electric shock as described in any one of claims 1 to 8, characterized in that, The control calibration is performed using the following steps: Regional images within the fountain pool area are obtained based on the regional image detection unit; Personnel image detection and recognition based on regional images within the fountain pool area; Alarm false triggering is determined based on personnel image detection and recognition results, and the on / off status of AC and DC power distribution switches; among which, If the personnel image detection identifies an intruder within the circular detection area, but the DC power distribution switch is not disconnected, the DC power distribution switch will be disconnected through the active switch adjustment unit. If the personnel image detection identifies no intruders within the ring detection area, but the DC power distribution switch is open, the DC power distribution switch will be reconnected via the active switch adjustment unit.

10. A method for managing an anti-electric shock fountain system according to claim 9, characterized in that, The following steps are also taken to prevent false alarms during the operation of the fountain unit: Obtain the operating mode of the fountain unit and ensure no intrusion into the fountain pool; Control the fountain unit to operate in the operating mode and acquire intrusion signals in real time; Align and bind the acquired intrusion signals with the operating mode on the timeline to obtain an alarm false trigger correction file; Obtain the current operating mode of the fountain unit and the corresponding alarm false trigger correction file; Use the alarm false trigger correction file to perform negative feedback control on the DC power distribution switch to shield against false alarms generated during the operation of the fountain unit.

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