A dynamic grounding LED lamp for fishing boats

Abstract

The utility model relates to LED lighting technical field, especially a kind of dynamic grounding's LED lamps for fishing boat;The utility model includes LED light source, DC power supply, radiator, lamp housing and controller, controller is normally closed type switching device and is connected in series in ground circuit, when lamp energization works, gets electricity and cuts off ground circuit, when lamp is powered off, loses power and turns on the ground circuit, so that ground state is not permanent invariable, but with the working state of lamp intelligent linkage, realizes the intelligent dynamic protection of power-off grounding safety, work isolation promotes efficiency.

Description

Technical Field

[0001] This utility model relates to the field of LED lighting technology, and in particular to a dynamically grounded LED lamp for fishing boats. Background Technology

[0002] With the popularization of LED technology, LED fish-attracting lights are gradually replacing traditional metal halide lamps due to their advantages such as low energy consumption, high luminous efficiency, and long lifespan. However, the applicant has discovered a long-standing but unresolved technical problem in practice: according to the electrical safety specifications of classification societies, the metal parts of the lamps must be permanently and reliably grounded. However, grounding can cause leakage current to enter the water, which can cause the LED fish-attracting lights to have a repellent effect on fish, severely weakening their fish-attracting effect.

[0003] To ensure the effectiveness of attracting fish and prevent leakage current from entering the water, the current practice is to leave LED fish-attracting lights ungrounded. However, in coastal areas where lightning is frequent, this lack of grounding makes the LED fish-attracting lights susceptible to damage from lightning strikes. Summary of the Invention

[0004] To overcome the above shortcomings, the purpose of this utility model is to provide a dynamically grounded LED light for fishing boats, which can intelligently switch the grounding mode according to the working status of the light, thereby ensuring both safety when not in operation and the best fish-attracting effect when in operation.

[0005] The technical solution of this utility model to solve its technical problem is:

[0006] A dynamically grounded LED lighting fixture for fishing boats includes an LED light source, a DC power supply, a heat sink, and a lighting fixture housing, which are connected to the ground via a grounding line. The fixture also includes a controller, which is a normally closed switching device connected in series with the grounding line. The controller is configured to: receive power and disconnect the grounding line when the lighting fixture is powered on, and lose power and connect the grounding line when the lighting fixture is powered off.

[0007] As an improvement of this utility model, the controller is an electromagnetic normally closed relay, a solid-state relay, or a reed relay.

[0008] As a further improvement of this utility model, when the controller is an electromagnetic normally closed relay, the controller relies on its internal spring to reset and close the contacts when power is lost.

[0009] As a further improvement of this utility model, the controller draws power from the input / output terminal of the DC power supply or from a node reflecting the working status of the lamp.

[0010] As a further improvement of this utility model, the controller is equipped with a lightning detection and protection module for detecting the instantaneous strong magnetic field generated by lightning strikes in the surrounding environment.

[0011] As a further improvement of this utility model, the controller is an external module or integrated into the DC power supply.

[0012] As a further improvement of this utility model, the grounding object is seawater, ship hull, or metal mounting frame.

[0013] This utility model includes an LED light source, a DC power supply, a heat sink, a lamp housing, and a controller. The controller is a normally closed switching device connected in series in the grounding line. When the lamp is powered on, it receives power and disconnects the grounding line. When the lamp is powered off, it loses power and connects the grounding line. This makes the grounding state not permanent but intelligently linked with the lamp's working state, realizing intelligent dynamic protection that ensures safety through power failure grounding and promotes efficiency through work isolation. Attached Figure Description

[0014] For ease of explanation, the present invention will be described in detail below with reference to the preferred embodiments and accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the state of the lamp of this utility model when it is not powered on (grounding is connected);

[0016] Figure 2 This is a schematic diagram showing the state of the lamp of this utility model when it is powered on and working (grounding disconnected);

[0017] Figure 3 For test data recording table;

[0018] Reference numerals: 11-Relay, 111-Spring, 112-Electromagnet, 113-Armature, 114-Moving contact, 115-Stationary contact, 116-Input / output terminal of DC power supply, 2-LED lamp body, 201-DC power supply, 202-Lamp housing, 203-Heat sink, 204-LED light source, 205-Wire, 3-Grounding, 4-Power switch, 501, 502, 503, 504-Grounding wire. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] like Figures 1 to 3 As shown, this utility model discloses a dynamically grounded LED light fixture for fishing boats, comprising an LED light source 204, a DC power supply 201, a heat sink 203, a light fixture housing 202, and a controller.

[0021] It is connected to the ground via a grounding line, and the controller is a normally closed switching device connected in series in the grounding line.

[0022] In this invention, when the lamp is powered on, it receives power and disconnects the grounding line; when the lamp is powered off, it loses power and reconnects the grounding line. This ensures that the grounding state is not permanent but is intelligently linked to the lamp's operating state, achieving intelligent dynamic protection that ensures safety through power-off grounding and promotes efficiency through operational isolation. Specifically, when the LED lamp is powered on, the controller receives power, its internal switch activates, and it disconnects the grounding line, isolating the lamp's metal components from the ground, thereby fundamentally eliminating leakage current during operation. When the LED lamp is powered off, the controller loses power and resets, automatically restoring the grounding line to ensure reliable grounding of the lamp's metal components, thus meeting lightning protection and safety requirements.

[0023] This invention achieves interconnection electrically through wires or direct mechanical contact, and ultimately converges to a grounding line. The other end of the grounding line is connected to the ground. In fishing boat application scenarios, the grounding object is seawater, the hull, or the metal mounting frame.

[0024] In this invention, the controller is a normally closed switching device, controlled by the lamp's operating power supply. It is connected in series to the grounding line, forming a controllable single-point break. The controller is an electromagnetic normally closed relay, a solid-state relay, or a reed relay. The electromagnetic normally closed relay utilizes the mechanical characteristic of spring reset when power is lost to achieve the highest reliability default grounding safety state. The controller relies on its internal spring to reset and close the contacts when power is lost. The controller draws power from the input / output terminal of the DC power supply or a node reflecting the lamp's operating status, breaking the conventional thinking that grounding must be permanent. This method implements sequential logic control of the grounding state through a simple switching device. Utilizing the inherent characteristics of normally closed devices, the grounding line is conductive in the default state when the controller is de-energized (i.e., the lamp is de-energized). This ensures maximum safety of the lamp during storage, transportation, installation, and non-working periods, meeting the basic requirements of lightning protection and electrical safety. When the lamp is energized, the controller is simultaneously energized and operates, actively disconnecting the grounding line. This operation physically cuts off the path for leakage current (mainly generated by the Y capacitor and parasitic capacitance inside the lamp board and power supply) to be discharged to the ground, thereby reducing the leakage current to a near-zero level.

[0025] In this invention, the controller is equipped with a lightning detection and protection module for detecting the instantaneous strong magnetic field generated by lightning strikes in the surrounding environment; the controller is an external module or integrated into the DC power supply.

[0026] This utility model provides several embodiments, as follows:

[0027] Example 1: Basic Implementation Scheme Based on Electromagnetic Normally Closed Relay

[0028] In Embodiment 1, the controller is an electromagnetic normally closed relay 11. The electromagnetic normally closed relay 11 includes a coil, an electromagnet 112 driven by the coil, a movable armature 113, a spring 111 providing a reset force, a moving contact 114 fixed on the armature 113, and a stationary contact 115 paired with the moving contact 114. The contact circuit of the relay 11 (i.e., the moving contact 114 and the stationary contact 115) is connected in series in the grounding line. The two ends of the coil of the relay 11 are connected to the DC output terminal of the DC power supply 201 through leads. This means that the operating voltage of the coil is synchronized with the power supply voltage of the LED light source 204.

[0029] In Example 1, such as Figure 1 As shown, when the power supply switch 4 is turned off, the entire system is de-energized, the DC power supply 201 has no output, and no current flows through the coil of the relay 11, so no magnetic force is generated. At this time, the preload of the spring 111 pulls the armature 113, so that the moving contact 114 and the stationary contact 115 maintain a tight physical contact. The grounding line 5 is in a low-resistance conducting state, and the metal parts of the lamp are reliably grounded through this path.

[0030] like Figure 2 As shown, when the power supply switch 4 is closed, the system starts and the DC power supply 201 starts working, providing a constant current to drive the LED light source 204 to emit light. At the same time, the output voltage of the DC power supply 201 is also applied to the coil of the relay 11. After the coil is energized, it generates a magnetic field. The electromagnet 112 generates sufficient electromagnetic attraction to attract the armature 113 to overcome the tension of the spring 111 and generate displacement. This mechanical movement causes the moving contact 114 to separate from the stationary contact 115, forming a physical gap, thereby completely disconnecting the grounding line 5. At this time, the metal parts of the lamp exhibit a high impedance state to the ground.

[0031] In Example 1, the rated voltage of the relay coil should match the output voltage of the DC power supply (e.g., 12V, 24V, or 48V), and its contact capacity should be able to meet the requirements of the ground fault current. Typically, a relay with a contact current capacity greater than 5A is selected to ensure reliability. The elastic coefficient of spring 111 needs to be optimized to ensure that the contacts can be reliably closed when the power is off, and that when the coil is energized, the electromagnetic force can stably overcome the elastic force to open the contacts, avoiding chatter.

[0032] Example 2: Alternative Implementation Scheme Based on Solid State Relays

[0033] For applications requiring longer mechanical life, faster response speed, or higher vibration resistance, the controller uses a normally closed solid-state relay. This solid-state relay typically contains an optocoupler and a normally closed (enhanced) MOSFET. When there is no current at the control terminal (the input terminal of the optocoupler), the internal circuit keeps the MOSFET in the conducting state. When there is current input at the control terminal, the optocoupler triggers the internal circuit to turn off the MOSFET. The power supply of the lamp is connected to the control terminal of the solid-state relay through a current-limiting resistor, and the grounding line is connected in series through the source and drain of the MOSFET. When the lamp is powered off, there is no signal at the control terminal, the MOSFET is turned on, and the grounding is connected. When the lamp is working, the control terminal is energized, the MOSFET is turned off, and the grounding is disconnected. It has no mechanical wear, a lifespan of hundreds of millions of cycles, operates silently, and is unaffected by vibration.

[0034] Example 3: Enhanced Implementation Scheme for Integrated Lightning Detection and Protection

[0035] To further enhance safety, especially in areas prone to thunderstorms, the controller integrates a lightning detection and protection module. This module consists of a magnetic field induction coil (Rogowski coil) paired with a voltage comparator circuit, or a transient voltage suppression diode paired with a trigger circuit. When the lights are operating normally (ground disconnected), if the lightning detection module detects a strong instantaneous magnetic field (or surge voltage induced on the line) in the surrounding environment caused by a lightning strike exceeding a preset safety threshold, it will immediately send a trigger signal to controller 1. This signal will temporarily override the control signal from the power supply, forcing controller 1 to restore the grounding state in a very short time (microseconds), providing a discharge channel for potential lightning currents. After the dangerous pulse passes, the system automatically resumes normal operating logic. This enhanced function adds an active safety protection layer to cope with extreme weather without affecting the normal fish-attracting effect.

[0036] To quantify and verify the technical effects of this utility model, the applicant conducted rigorous comparative tests, as follows:

[0037] 1. Test conditions:

[0038] Test comparison example: using a traditional permanently grounded LED fish-attracting light of the same specification;

[0039] Test Example: The same LED fish-attracting light as in Example 1 was used;

[0040] Test instrument: KEITHLEY 6517B high resistance meter / micro ammeter;

[0041] Test method: Connect an ammeter in series with the grounding wire of the lamp and measure the leakage current to ground when the lamp is working stably at its rated power;

[0042] 2. Test data recording table, such as Figure 3 As shown.

[0043] like Figure 3 As shown, the test data fully demonstrates that this invention can uniformly reduce the leakage current of LED fish-attracting lights with different topologies to an extremely low level of less than 0.01mA. This value is far below the perception threshold of most economic fish species for electric fields in water, thus completely solving the technical problem of fish repelling by leakage current. At the same time, through the intelligent switching logic of default grounding, it perfectly ensures the lightning protection safety of personnel and equipment during non-working periods. This significant and stable technical effect is something that traditional static grounding solutions cannot achieve.

[0044] This utility model has the following significant advantages:

[0045] 1. Reduced leakage current: Under operating conditions, the leakage current is reduced to an extremely low level of <0.01mA, completely eliminating interference with fish;

[0046] 2. Dynamic Intelligent Safety: It realizes intelligent dynamic protection that ensures safety through grounding during power outages and promotes efficiency through work isolation;

[0047] 3. High versatility: It is not dependent on the power supply type and is effective for both isolated and non-isolated power supplies;

[0048] 4. High reliability and low cost: It adopts mature and reliable switching devices (relays), has a simple structure, and is easy to implement and promote.

[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dynamically grounded LED light fixture for fishing boats, comprising an LED light source, a DC power supply, a heat sink, and a light fixture housing, connected to ground via a grounding line, characterized in that: It also includes a controller, which is a normally closed switching device and is connected in series in the grounding line; The controller is configured to: receive power and disconnect the grounding line when the lamp is powered on, and lose power and connect the grounding line when the lamp is powered off.

2. The dynamically grounded LED lighting fixture for fishing boats according to claim 1, characterized in that: The controller is an electromagnetic normally closed relay, a solid-state relay, or a reed relay.

3. The dynamically grounded LED lighting fixture for fishing boats according to claim 2, characterized in that: When the controller is an electromagnetic normally closed relay, the controller relies on its internal spring to reset and close the contacts when power is lost.

4. The dynamically grounded LED lighting fixture for fishing boats according to claim 1, characterized in that: The controller draws power from the input / output terminal of a DC power supply or from a node that reflects the operating status of the lamp.

5. A dynamically grounded LED lighting fixture for fishing boats according to claim 1, characterized in that: The controller is equipped with a lightning detection and protection module for detecting instantaneous strong magnetic fields generated by lightning strikes in the surrounding environment.

6. A dynamically grounded LED lighting fixture for fishing boats according to claim 1, characterized in that: The controller is either an external module or integrated into the DC power supply.

7. A dynamically grounded LED lighting fixture for fishing boats according to claim 1, characterized in that: The grounding object is seawater, ship hull, or metal mounting frame.

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