Optimization service alarm circuit based on fuse state detection

Abstract

An optimization service alarm circuit based on fuse state detection comprises a first power supply, a first fuse, a photoelectric coupler, a first current-limiting resistor, a triode, an MCU controller, a second power supply and a second current-limiting resistor. The input end of the first fuse is connected with a first power supply, and the output end is connected with the triode; the input end of the photoelectric coupler is connected with a first power supply, and the output end is connected with the first current-limiting resistor; the input end of the first current-limiting resistor is connected with the photoelectric coupler, and the output end is connected with the triode; the input end of the triode is connected with the first current-limiting resistor, the first output end of the triode is connected with the I / O port of the MCU controller, and the second output end of the triode is connected with the GND; the input end of the second current-limiting resistor is connected with the second power supply, and the output end is connected with the triode. According to the utility model, various alarm modes are provided, and information is visual and clear. According to the utility model, electrical isolation is realized through the photoelectric coupler, and the safety and reliability of the detection circuit are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of protection circuit, specifically relates to a kind of optimization service alarm circuit based on the state of detection fuse. BACKGROUND

[0002] Fuse circuit, also known as fuse circuit, is an important safety protection device. When the current in the circuit exceeds the preset threshold, the fuse will quickly melt due to overheating, thereby cutting off the circuit to prevent the device from being damaged due to long-term exposure to high current. However, the traditional fuse often cannot alarm in time after melting, which brings inconvenience to circuit maintenance and fault troubleshooting. Therefore, it is particularly important to develop a protection circuit that can monitor the state of the fuse in real time and send an alarm signal when the fuse melts. SUMMARY

[0003] In view of the above problems, the utility model is proposed to provide an optimization service alarm circuit based on the state of detection fuse to overcome the above problems or at least partially solve the above problems.

[0004] To solve the above technical problems, the present application discloses the following technical scheme:

[0005] The utility model embodiment discloses an optimization service alarm circuit based on the state of detection fuse, comprising: a first power supply, a first fuse, an optoelectronic coupler, a first current limiting resistor, a triode, an MCU controller, a second power supply and a second current limiting resistor; wherein:

[0006] The input end of the first fuse is connected with the first power supply, and the output end of the first fuse is connected with the triode;

[0007] The input end of the first current limiting resistor is connected with the optoelectronic coupler, and the output end of the first current limiting resistor is connected with the triode; the input end of the triode is connected with the first current limiting resistor, the first output end of the triode is connected with the I / O port of the MCU controller, and the second output end of the triode is connected with GND; the input end of the second current limiting resistor is connected with the second power supply, and the output end of the second current limiting resistor is connected with the triode.

[0008] Further, the optoelectronic coupler and the first current limiting resistor are connected in series, and then connected in parallel with the first fuse.

[0009] Further, the triode is an NPN triode, wherein the base of the NPN triode is connected with the current limiting resistor, the emitter of the NPN triode is connected with GND, and the collector of the triode is connected with the I / O port of the MCU controller.

[0010] Further, the second power supply adopts a 5V power supply.

[0011] Further, the optimization service alarm circuit based on detecting the fuse state further comprises a digital tube and a buzzer.

[0012] Further, the optimization service alarm circuit based on detecting the fuse state further comprises a second fuse, a rectifier bridge, a voltage reduction chip and a detection chip.

[0013] Further, the second fuse has a current smaller than that of the first fuse.

[0014] Further, the first power supply is a 12V power supply.

[0015] Further, the optimization service alarm circuit based on detecting the fuse state further comprises a filter circuit, an input end of the filter circuit being connected with the rectifier bridge, and an output end of the filter circuit being connected with the voltage reduction chip.

[0016] The above technical solution provided by the embodiment of the utility model has at least the following beneficial effects:

[0017] The utility model discloses a kind of optimization service alarm circuit based on detecting fuse state, comprising: first power supply, first fuse, photoelectric coupler, first current-limiting resistor, triode, MCU controller, second power supply and second current-limiting resistor;Wherein: the input end of first fuse is connected with first power supply, and the output end of first fuse is connected with triode;The input end of photoelectric coupler is connected with first power supply, and the output end of photoelectric coupler is connected with first current-limiting resistor;The input end of first current-limiting resistor is connected with photoelectric coupler, and the output end of first current-limiting resistor is connected with triode;The input end of triode is connected with first current-limiting resistor, and the first output end of triode is connected with the I / O port of MCU controller, and the second output end of triode is connected with GND;The input end of second current-limiting resistor is connected with second power supply, and the output end of second current-limiting resistor is connected with triode.The utility model realizes the real-time detection after main circuit fuse fusing, and alarm is timely and accurate.The utility model provides multiple alarm modes (buzzer, nixie tube, voice prompt), and information is intuitive and clear.The utility model realizes electrical isolation by photoelectric coupler, and improves the safety and reliability of detection circuit.The utility model spare power supply design ensures the continuous work of detection circuit under fault condition, and does not affect alarm function.The utility model circuit structure is simple, and cost is low, easy to implement and promote.

[0018] The technical scheme of the utility model will be described in further detail below by means of drawings and examples. DRAWINGS

[0019] The drawings are used to provide further understanding of the utility model, and constitute part of the specification, and are used to explain the utility model together with the embodiments of the utility model, and do not constitute limitation to the utility model.In the drawings:

[0020] Figure 1 It is the first circuit diagram of a kind of optimization service alarm circuit based on detecting fuse state in the utility model embodiment 1;

[0021] Figure 2 It is the second circuit diagram of a kind of optimization service alarm circuit based on detecting fuse state in the utility model embodiment 1. DETAILED DESCRIPTION

[0022] Exemplary embodiments of the present disclosure will be described below in greater detail with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be accurately conveyed to those skilled in the art.

[0023] In order to solve the problems in the prior art, the utility model discloses an optimization service alarm circuit based on detecting fuse state.

[0024] Embodiment 1

[0025] The utility model discloses a kind of optimization service alarm circuit based on detecting fuse state, such as Figure 1 , comprising: first power supply, first fuse, photoelectric coupler, first current-limiting resistor, triode, MCU controller, second power supply and second current-limiting resistor;Wherein:

[0026] The input end of the first fuse is connected with the first power supply, and the output end of the first fuse is connected with the triode.

[0027] The input end of the photoelectric coupler is connected with the first power supply, and the output end of the photoelectric coupler is connected with the first current-limiting resistor;The input end of the first current-limiting resistor is connected with the photoelectric coupler, and the output end of the first current-limiting resistor is connected with the triode;The input end of the triode is connected with the first current-limiting resistor, the first output end of the triode is connected with the I / O port of the MCU controller, and the second output end of the triode is connected with GND;The input end of the second current-limiting resistor is connected with the second power supply, and the output end of the second current-limiting resistor is connected with the triode.

[0028] Specifically, in the embodiment, the photoelectric coupler and the first current-limiting resistor are connected in series, and then are connected in parallel with the first fuse. Specifically, the main fuse is connected in series in the main circuit and is used for overcurrent protection. When the current exceeds the rated value, the main fuse is fused. The photoelectric coupler is connected in parallel at both ends of the main fuse, and the input current is controlled by the current-limiting resistor (R1). When the main fuse is fused, the photoelectric coupler emits light through the emission end and transmits the optical signal to the receiving end. In the embodiment, the current-limiting resistor is connected in series at the input end of the photoelectric coupler, which is used for limiting the working current of the photoelectric coupler to avoid overload damage.

[0029] In the embodiment, the triode is an NPN triode, wherein the base of the NPN triode is connected with the current-limiting resistor, the emitter of the NPN triode is connected with GND, and the collector of the triode is connected with the I / O port of the MCU controller.

[0030] In the embodiment, the second power supply is a 5V power supply. In the embodiment, the optimization service alarm circuit based on detecting fuse state further includes a digital tube and a buzzer. The digital tube and the buzzer are connected with the MCU controller, and are used for receiving the control signal sent by the MCU controller and responding to the control signal.

[0031] The optimization service alarm circuit based on detecting fuse state disclosed in the embodiment has the following working principle:

[0032] Normal working state: when the first fuse is not blown, the current passes through the main circuit normally, the optocoupler is not turned on, the transistor remains off, the IO port of the MCU remains high, and the device operates normally.

[0033] Fault detection state: after the first fuse is blown, the current passes through the emitter of the optocoupler and the current-limiting resistor to form a loop, the optocoupler emits light, the receiver is turned on, the base of the transistor obtains current to trigger conduction, and the IO port of the MCU changes from high to low.

[0034] Alarm and feedback: after the MCU detects the change in the IO port state, it triggers the digital tube to display the fault code, drives the buzzer and voice chip to issue a fault alarm, and reminds the maintenance personnel to troubleshoot the faulty circuit and replace the fuse.

[0035] Fault recovery state: after troubleshooting the faulty circuit and replacing the new fuse, the main circuit returns to normal, the optocoupler is turned off, the MCU detects that the IO port returns to high, the alarm device stops working, and the device operates normally.

[0036] In order to better understand the embodiment, the working principle of the disclosed optimization service alarm circuit based on detecting the fuse state is explained. A photocoupler and a current limiting resistor are connected in parallel on the fuse. The photocoupler is protected from being burnt by a large current. When the fuse is blown, the current cannot pass through the fuse to reach the load. At this time, the current passes through the photocoupler connected in parallel on the fuse, and then reaches the current limiting resistor from the photocoupler. The resistance of the current limiting resistor is relatively large, and the circuit forms a loop. The photocoupler emits light and emits light to the receiving end. The receiving end is connected to a 5V voltage. The receiving end has a certain voltage drop value, and the receiving end is in an open state. Weak current passes through the receiving end and reaches the current limiting resistor. After the current limiting resistor, the current flows into the base of the NPN triode. The collector of the triode is connected to the IO port of the MCU. After the IO port is powered on, a high level is given to the IO port according to the specified program. Before the triode is opened, it is always in a high level state. The emitter of the triode is connected to a GND. If the IO port of the MCU cannot provide a high level, a pull-up resistor is designed for the IO port to always be in a high level state. Since the receiving end of the photocoupler is open, a high level flows into the base of the triode, and the triode is in an open state. The IO port is changed from 1 to 0. The program of the MCU detects the change of the state of the IO port. The program judges that the data is true. The corresponding digital tube displays the fault code, and the buzzer emits a tictactoe sound. The relay is de-energized, the voice chip starts to work, and the voice broadcasts the fault of the blown fuse. After the maintenance personnel replace the new fuse and power on, the current cannot pass through the photocoupler, and the photocoupler is in a closed state. The IO port of the MCU is changed from 0 to 1. The fault code, the buzzer, and the voice are no longer displayed. The relay is energized and normally attracted, and the circuit normally works. The purpose of this design is to facilitate the maintenance personnel to give the maintenance scheme through the fault code and the voice broadcast in the first time, and to repair the fault of the circuit in a short time.

[0037] In some preferred embodiments, as Figure 2 An optimization service alarm circuit based on detecting the fuse state further comprises a second fuse, a rectifier bridge, a voltage reduction chip, and a detection chip. The input end of the second fuse is connected with a first power supply, and the output end of the second fuse is connected with the rectifier bridge. The input end of the rectifier bridge is connected with the second fuse, and the output end of the rectifier bridge is connected with the voltage reduction chip. The input end of the voltage reduction chip is connected with the rectifier bridge, and the output end of the voltage reduction chip is connected with the detection chip.

[0038] In the embodiment, the rated current of the second fuse is less than that of the first fuse.

[0039] In the embodiment, the first power supply is 12V.

[0040] In the embodiment, the optimization service alarm circuit based on detecting the fuse state further comprises a filter circuit, an input end of the filter circuit being connected with the rectifier bridge, and an output end of the filter circuit being connected with the voltage reduction chip.

[0041] In the embodiment, a small fuse is designed in front of the fuse, and a rectifier bridge is connected behind the small fuse.

[0042] The utility model discloses a kind of optimization service alarm circuits based on detecting the fuse state, comprising: first power supply, first fuse, photoelectric coupler, first current-limiting resistor, triode, MCU controller, second power supply and second current-limiting resistor;Wherein: the input end of first fuse is connected with first power supply, and the output end of first fuse is connected with triode;The input end of photoelectric coupler is connected with first power supply, and the output end of photoelectric coupler is connected with first current-limiting resistor;The input end of first current-limiting resistor is connected with photoelectric coupler, and the output end of first current-limiting resistor is connected with triode;The input end of triode is connected with first current-limiting resistor, and the first output end of triode is connected with the I / O port of MCU controller, and the second output end of triode is connected with GND;The input end of second current-limiting resistor is connected with second power supply, and the output end of second current-limiting resistor is connected with triode.The utility model realizes the real-time detection after the main circuit fuse is fused, and alarm is timely and accurate.The utility model provides multiple alarm modes (buzzer, nixie tube, voice prompt), and information is intuitive and clear.The utility model realizes electrical isolation by photoelectric coupler, and improves the safety and reliability of detection circuit.The utility model spare power supply design ensures the continuous work of detection circuit under fault condition, and does not affect alarm function.The utility model circuit structure is simple, and cost is low, easy to implement and promote.

Claims

1. An optimized service alerting circuit based on detecting fuse status, characterized by, The application relates to a power supply circuit, which comprises the following components: a first power supply, a first fuse, a photoelectric coupler, a first current-limiting resistor, a triode, an MCU controller, a second power supply and a second current-limiting resistor; wherein: the input end of the first fuse is connected with the first power supply, and the output end of the first fuse is connected with the triode; the input end of the photoelectric coupler is connected with the first power supply, and the output end of the photoelectric coupler is connected with the first current-limiting resistor; the input end of the first current-limiting resistor is connected with the photoelectric coupler, and the output end of the first current-limiting resistor is connected with the triode; the input end of the triode is connected with the first current-limiting resistor, the first output end of the triode is connected with the I / O port of the MCU controller, and the second output end of the triode is connected with GND; the input end of the second current-limiting resistor is connected with the second power supply, and the output end of the second current-limiting resistor is connected with the triode.

2. An optimized service alerting circuit based on detecting fuse status as claimed in claim 1, wherein, The photoelectric coupler and the first current-limiting resistor are connected in series, and then are connected in parallel with the first fuse.

3. An optimized service alerting circuit based on detecting fuse status as claimed in claim 1, wherein, The triode is an NPN triode, wherein the base of the NPN triode is connected with the current-limiting resistor, the emitter of the NPN triode is connected with GND, and the collector of the triode is connected with the I / O port of the MCU controller.

4. An optimized service alerting circuit based on detecting fuse status as claimed in claim 1, wherein, The second power supply is a 5V power supply.

5. An optimized service alerting circuit based on detecting fuse status as claimed in claim 1, wherein, The power supply circuit further comprises a nixie tube and a buzzer; the nixie tube and the buzzer are connected with the MCU controller, and are used for receiving the control signal sent by the MCU controller and responding to the control signal.

6. An optimized service alerting circuit based on detecting fuse status as claimed in claim 1, wherein, The power supply circuit further comprises: a second fuse, a rectifier bridge, a voltage reduction chip and a detection chip; the input end of the second fuse is connected with the first power supply, and the output end of the second fuse is connected with the rectifier bridge; the input end of the rectifier bridge is connected with the second fuse, and the output end of the rectifier bridge is connected with the voltage reduction chip; the input end of the voltage reduction chip is connected with the rectifier bridge, and the output end of the voltage reduction chip is connected with the detection chip.

7. An optimized service alerting circuit based on detecting fuse status as claimed in claim 6, wherein, The rated current of the second fuse is smaller than that of the first fuse.

8. An optimized service alerting circuit based on detecting fuse status as claimed in claim 6, wherein, The first power supply is a 12V power supply.

9. An optimized service alerting circuit based on detecting fuse status as claimed in claim 6, wherein, The power supply circuit further comprises a filter circuit, the input end of the filter circuit is connected with the rectifier bridge, and the output end of the filter circuit is connected with the voltage reduction chip.

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