Single lamp controller with leakage protection

Abstract

The utility model particularly relates to a single lamp controller with earth leakage protection. The single lamp controller comprises a power switch module which is electrically connected with a bus communication module, a processor module and a relay module and supplies power to the bus communication module, the processor module and the relay module; the bus communication module is electrically connected with the processor module and performs two-way transmission with the processor module; the processor module is electrically connected with the relay module and the dimming module, the processor module is used for processing signals sent by the bus communication module and controlling on-off of the relay module and the dimming module, and the dimming module is used for controlling the brightness of the intelligent lamp; the processor module is also in bidirectional connection with the electric leakage detection module, and the electric leakage detection module collects leakage current data and performs operational amplification, feeds back the data to the processor module for processing, and controls whether the relay module is powered off or not according to a preset value. According to the utility model, a power supply can be quickly cut off when electric leakage occurs in electrical equipment, so that a user is protected from being injured by electric shock, safety risk expansion caused by delay is avoided, and electric shock accidents are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electric leakage protection of circuits, and particularly relates to a single-lamp controller with electric leakage protection. Background Art

[0002] The function of electric leakage protection of single-lamp controllers is widely used in modern urban lighting systems in order to improve lighting effects and management efficiency through intelligent management tools. However, although single-lamp controllers bring the convenience of energy saving and intelligent control, their electric leakage protection functions have some drawbacks that cannot be ignored:

[0003] 1. The single-lamp controller with electric leakage protection is more complex in hardware than ordinary controllers, which directly leads to an increase in equipment costs. Moreover, the complex electric leakage protection design may require a professional maintenance team and more frequent inspections and maintenance to keep it in good operating condition, thus increasing the economic burden of long-term operation.

[0004] 2. In practical applications, high-precision electric leakage detection is a challenge and a technical limitation. Especially in a complex power grid environment, it may be affected by factors such as electromagnetic interference, reducing the accuracy of detection.

[0005] 3. In extreme weather or harsh environments, the reliability of electric leakage protection may also be affected. For example, rainwater intrusion may cause short circuits or other faults, affecting its normal operation.

[0006] 4. The electric leakage protection itself also consumes a certain amount of electric energy during continuous monitoring, which is an issue that cannot be ignored for intelligent lighting systems that pursue high energy efficiency. Content of the Utility Model

[0007] In order to solve the problems existing in the above-mentioned prior art, the purpose of the utility model is to provide a single-lamp controller with electric leakage protection. The purpose of the utility model is to ensure the safe, reliable and efficient operation of the electrical system, which can greatly reduce the risks of electric shock accidents and electrical fires. At the same time, it can improve the response speed and reliability of the system. The electric leakage protection can quickly cut off the power supply when an electric leakage occurs in an electrical device, thereby protecting users from electric shock injuries and avoiding the expansion of safety risks caused by delays, and reducing the occurrence of electric shock accidents.

[0008] A single-lamp controller with electric leakage protection according to the utility model includes a power switch module, a bus communication module, a processor module, a relay module, a dimming module and an electric leakage detection module.

[0009] The power switch module is electrically connected to and supplies power to the bus communication module, the processor module and the relay module respectively.

[0010] The bus communication module is electrically connected to the processor module and transmits bidirectionally. The bus communication module is used to establish multiple intelligent control nodes;

[0011] The processor module is respectively electrically connected to the relay module and the dimming module. The processor module is used to process the signals sent by the bus communication module and control the on / off of the relay module and the dimming module. The dimming module is used to control the brightness of the intelligent lamp;

[0012] The processor module is also bidirectionally connected to the leakage detection module. The leakage detection module collects leakage current data, performs arithmetic amplification, and then feeds it back to the processor module for processing, and controls whether the relay module is powered off according to a preset value.

[0013] In one embodiment, the processor module generates a leakage level signal or a current signal to form an input voltage. The leakage detection module includes an anti-parallel diode connected to the input voltage. The positive pole of the input voltage is respectively connected to one end of a resistor R34 and a resistor R35. A filter capacitor C19 is connected between the other ends of the resistor R34 and the resistor R35. And the other end of the resistor R34 is connected to the inverting input terminal of a first operational amplifier. The other end of the resistor R35 is connected to the output terminal of the first operational amplifier and commonly connected to the common terminal through a capacitor C6. The output terminal of the first operational amplifier is also connected to the processor module; the negative pole of the input voltage is respectively connected to the non-inverting input terminal of the first operational amplifier, the inverting input terminal and the output terminal of a second operational amplifier. The non-inverting input terminal of the second operational amplifier is electrically connected to a bias circuit.

[0014] In one embodiment, the bias circuit includes a resistor R36 and a resistor R37 connected in series in sequence from the positive pole of the power supply to the common terminal. A filter capacitor C20 is connected in parallel at both ends of the resistor R37, so as to form a bias voltage node between the resistor R36 and the resistor R37 and be electrically connected to the non-inverting input terminal of the second operational amplifier.

[0015] In one embodiment, the positive pole of the power supply terminal of the first operational amplifier is connected to the positive pole of the power supply, and the negative pole of the power supply terminal of the first operational amplifier is connected to the common terminal.

[0016] In one embodiment, the positive pole of the power supply terminal of the second operational amplifier is connected to the positive pole of the power supply, and the negative pole of the power supply terminal of the second operational amplifier is connected to the common terminal.

[0017] In one embodiment, the dimming module is a 0-10V intelligent lighting dimmer with a model number of MG-DH or A1-MFD-1414 or ZNTGMK12LM.

[0018] In one embodiment, the relay module is a 10A normally open relay.

[0019] In one embodiment, the processor module is a 32-bit processor of model STM32F103.

[0020] Compared with the prior art, the beneficial effects of the technical solution of the present utility model are as follows:

[0021] 1. The purpose of the present utility model is to ensure the safe, reliable and efficient operation of the electrical system. As the signal module for receiving intelligent control signals and dispatching relays and intelligent lights, the processor module can greatly reduce the risks of electric shock accidents and electrical fires through effective leakage protection measures connected to the processor module, thereby avoiding damage to the relay or intelligent light circuit, while improving the response speed and reliability of the system. The leakage protection can quickly cut off the power supply when an electrical leakage occurs in the electrical equipment, thus protecting the user from electric shock injury and avoiding the expansion of safety risks caused by delay, and reducing the occurrence of electric shock accidents.

[0022] 2. The specific design of the leakage detection module of the present utility model can monitor the circuit in real time, and the leakage protection continuously monitors the leakage current in the electrical system to ensure the normal operation and safety of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a connection schematic diagram of a single lamp controller with leakage protection according to the present utility model;

[0024] Figure 2 is a circuit diagram of the leakage detection module of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The drawings are only for illustrative purposes and should not be construed as a limitation of this patent; for better illustration of this embodiment, some components in the drawings will be omitted, enlarged or reduced, and do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0026] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be said that the interiors of two components are connected. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. The technical solutions of the present utility model will be further described below with reference to the drawings and embodiments.

[0027] AsFigure 1 As shown, a single-lamp controller with leakage protection of the present utility model includes a power switch module, a bus communication module, a processor module, a relay module, a dimming module, and a leakage detection module.

[0028] The power switch module is electrically connected to and supplies power to the bus communication module, the processor module, and the relay module respectively.

[0029] The bus communication module is electrically connected to the processor module and transmits bidirectionally. The bus communication module is used to establish multiple intelligent control nodes.

[0030] The processor module is electrically connected to the relay module and the dimming module respectively. The processor module is used to process the signals sent by the bus communication module and control the on / off of the relay module and the dimming module. The dimming module is used to control the brightness of the intelligent lamp.

[0031] The processor module is also bidirectionally connected to the leakage detection module. The leakage detection module collects leakage current data, performs arithmetic amplification, and then feeds it back to the processor module for processing, and controls whether the relay module is powered off according to a preset value.

[0032] The purpose of the present utility model is to ensure the safe, reliable, and efficient operation of the electrical system. The processor module, as a signal module for receiving intelligent control signals and deploying relays and intelligent lamps, can greatly reduce the risks of electric shock accidents and electrical fires through effective leakage protection measures connected to the processor module, thereby avoiding damage to the relay or intelligent lamp circuit, improving the response speed and reliability of the system at the same time. Leakage protection can quickly cut off the power supply when an electrical device leaks electricity, thus protecting users from electric shock injuries, avoiding the expansion of safety risks caused by delays, and reducing the occurrence of electric shock accidents.

[0033] The power switch module provides power supply for the entire single-lamp controller. The processor module is a 32-bit processor of model STM32F103, with a clock frequency of 48MHz, which can process relevant data efficiently and reliably and implement functions such as control. The bus communication module is a CAN bus circuit, which uses reliable and stable twisted-pair bus communication to realize the transceiver of bus data. The relay module is a 10A normally open relay, and a reliable drive circuit can be added to realize the switch and freewheeling protection of the relay. The dimming module is a 0-10V intelligent lighting dimmer of model MG-DH or A1-MFD-1414 or ZNTGMK12LM. This circuit is a 0-10V generator and outputs to the corresponding drive to realize dimming. The leakage detection module uses a high-precision operational amplifier to realize the acquisition, arithmetic amplification of current data, and is processed by the processor module to calculate the final leakage current, and can realize the power-off protection function according to a preset value.

[0034] In one of the embodiments, asAs shown in Figure 2 , the processor module generates a leakage level signal or a current signal to form input voltages INT+ and INT-. The leakage detection module includes an antiparallel diode connected to the input voltages. The antiparallel diode is actually two diodes D11 and D12 connected in reverse parallel across the two ends of the input voltages, thereby forming a limiting circuit, which can prevent large signals from entering the subsequent operational amplifier circuit and damaging the subsequent operational amplifier circuit. The positive pole of the input voltages is respectively connected to one end of resistor R34 and resistor R35. A filter capacitor C19 is connected between the other ends of resistor R34 and resistor R35. And the other end of resistor R34 is connected to the inverting input terminal of the first operational amplifier U13. The other end of resistor R35 is connected to the output terminal of the first operational amplifier U13 and commonly connected to the common terminal through capacitor C6. The output terminal ADC1 of the first operational amplifier U13 is also connected to the processor module. The negative pole of the input voltages is respectively connected to the non-inverting input terminal of the first operational amplifier U13, the inverting input terminal and the output terminal of the second operational amplifier U14. The non-inverting input terminal of the second operational amplifier U14 is electrically connected to the bias circuit. The final output of the entire circuit is at the output terminal pin of the first operational amplifier U13. After output, it is sent to the processor module to process the leakage level or current signal, and the actual leakage value is calculated through an algorithm, thereby realizing the functions of leakage detection and control. Through effective leakage detection, the leakage detection module can timely detect the leakage current, automatically cut off the power supply when an abnormality is found, prevent electrical safety accidents caused by leakage, and can also assist maintenance personnel to more accurately locate the specific position of the leakage point, simplify the fault diagnosis process, shorten the repair time, and reduce the maintenance difficulty. Especially in complex or tall structures, accurately and quickly locating the fault can greatly reduce the maintenance difficulty and potential safety hazards of engineering personnel during maintenance. Therefore, through effective leakage protection and intelligent control, the maintenance and replacement costs caused by faults and accidents are reduced, and the service life of this component is extended.

[0035] Further, the bias circuit includes resistor R36 and resistor R37 connected in series in sequence from the positive pole of the power supply to the common terminal. A filter capacitor C20 is connected in parallel across the two ends of resistor R37, thereby forming a bias voltage node between resistor R36 and resistor R37 and being electrically connected to the non-inverting input terminal of the second operational amplifier U14. The bias voltage refers to a constant voltage provided to enable an electronic device or circuit to work properly. The power supply AVCC forms a more stable bias voltage node through resistor R36 and resistor R37, and the parallel filter capacitor C20 is responsible for the filtering function, making the voltage input to the non-inverting input terminal of the second operational amplifier U14 a constant voltage, so that the non-inverting input terminal of the first operational amplifier U13 is also a fixed voltage signal. Then, the leakage signal received by the inverting input terminal of the first operational amplifier U13 can be amplified by its output terminal and output to the processor module.

[0036] ​In addition, the positive pole of the power supply terminal of the first operational amplifier U13 is connected to the positive pole of the power supply, and the negative pole of the power supply terminal of the first operational amplifier U13 is connected to the common terminal. The positive pole of the power supply terminal of the second operational amplifier U14 is connected to the positive pole of the power supply, and the negative pole of the power supply terminal of the second operational amplifier U14 is connected to the common terminal. Both the first operational amplifier U13 and the second operational amplifier U14 are powered by a single power supply. Since the leakage voltage does not require a negative voltage output, a single power supply for the analog circuit is sufficient.

[0037] In the description of the present application, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description. Without contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present application.

[0038] In the figure, the description of the positional relationship is only for illustrative purposes and should not be construed as a limitation on this patent; obviously, the above-mentioned embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A single lamp controller with leakage protection, characterized in that: It includes power switch module, bus communication module, processor module, relay module, dimming module and leakage detection module. The power switch module is electrically connected to the bus communication module, the processor module and the relay module respectively and supplies power; The bus communication module is electrically connected to the processor module and performs bidirectional transmission, and the bus communication module is used to establish a plurality of intelligent control nodes; The processor module is electrically connected to the relay module and the dimming module respectively, and the processor module is used to process the signal sent by the bus communication module and control the on and off of the relay module and the dimming module, and the dimming module is used to control the brightness of the smart lamp; The processor module is also bidirectionally connected to the leakage detection module. The leakage detection module collects leakage current data and performs operational amplification, thereby feeding back to the processor module for processing, and controls whether the relay module is powered off according to a preset value.

2. A single lamp controller with leakage protection according to claim 1, characterized in that: The processor module generates a leakage level signal or a current signal to form an input voltage, and the leakage detection module includes an anti-parallel diode connected to the input voltage. The positive electrode of the input voltage is respectively connected to one end of the resistor R34 and the resistor R35, and a filter capacitor C19 is connected between the other ends of the resistor R34 and the resistor R35, and the other end of the resistor R34 is connected to the inverting input end of the first operational amplifier, and the other end of the resistor R35 is connected to the output end of the first operational amplifier and connected to the common end through the capacitor C6. The output end of the first operational amplifier is also connected to the processor module; the negative electrode of the input voltage is respectively connected to the non-inverting input end of the first operational amplifier, the inverting input end and the output end of the second operational amplifier, and the non-inverting input end of the second operational amplifier is electrically connected to the bias circuit.

3. A single lamp controller with leakage protection according to claim 2, characterized in that: The bias circuit includes a resistor R36 and a resistor R37 connected in series from the positive electrode of the power supply to the common end, and a filter capacitor C20 is connected in parallel at both ends of the resistor R37, so that a bias voltage node is formed between the resistor R36 and the resistor R37 and is electrically connected to the non-inverting input end of the second operational amplifier.

4. A single lamp controller with leakage protection according to claim 3, characterized in that: The positive pole of the power supply terminal of the first operational amplifier is connected to the positive pole of the power supply, and the negative pole of the power supply terminal of the first operational amplifier is connected to the common terminal.

5. A single lamp controller with leakage protection according to claim 4, characterized in that: The positive pole of the power supply terminal of the second operational amplifier is connected to the positive pole of the power supply, and the negative pole of the power supply terminal of the second operational amplifier is connected to the common terminal.

6. A single lamp controller with leakage protection according to claim 1, characterized in that: The dimming module is a 0-10V intelligent lighting dimmer with the model of MG-DH, A1-MFD-1414 or ZNTGMK12LM.

7. A single lamp controller with leakage protection according to claim 1, characterized in that: The relay module is a 10A normally open relay.

8. A single lamp controller with leakage protection according to claim 1, characterized in that: The processor module is a 32-bit processor of model STM32F103.

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