CN221039139U - Visual intelligent junction box - Google Patents
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- CN221039139U CN221039139U CN202322639452.1U CN202322639452U CN221039139U CN 221039139 U CN221039139 U CN 221039139U CN 202322639452 U CN202322639452 U CN 202322639452U CN 221039139 U CN221039139 U CN 221039139U
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- 230000000007 visual effect Effects 0.000 title abstract description 12
- 238000001514 detection method Methods 0.000 claims abstract description 50
- 238000004891 communication Methods 0.000 claims description 11
- 239000003990 capacitor Substances 0.000 claims description 7
- 238000010891 electric arc Methods 0.000 abstract description 23
- 238000009413 insulation Methods 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
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Abstract
The utility model relates to the technical field of junction boxes, and provides a visual intelligent junction box which comprises an electric arc detection circuit, wherein the electric arc detection circuit comprises a current transformer P1, a resistor R8, a resistor R7, a diode D1, a diode D2, a diode D3 and a diode D4, the first end of the current transformer P1 is connected with the first end of the resistor R8, the second end of the current transformer P1 is connected with the second end of the resistor R8, the first end of the resistor R7 is connected with a 5V power supply, the second end of the resistor R7 is connected with the anode of the diode D1, the cathode of the diode D1 is connected with the anode of the diode D2, the cathode of the diode D2 is grounded, the anode of the diode D1 is connected with the second end of the resistor R8, the cathode of the diode D3 is connected with a 3.3V power supply, the anode of the diode D3 is connected with the first end of the resistor R8, the cathode of the diode D4 is connected with the anode of the diode D4 to the ground, and the first end of the resistor R8 is connected with a master control unit. Through the technical scheme, the problem of poor working performance of the insulation detection circuit in the related technology is solved.
Description
Technical Field
The utility model relates to the technical field of branch boxes, in particular to a visual intelligent branch box.
Background
The landscape requirement of urban construction drives the standard of new construction and reconstruction engineering of urban power grids to rise greatly, in the urban power grid construction, the number of electric overhead lines passing through towns is small, the number of underground cables is large, and a large number of medium-voltage cable distribution boxes are used. The low-voltage line cable is used as a current-carrying main body and a terminal for power transmission, and the junction box transfers and branches the low-voltage line cable so as to achieve the purpose of power supply and distribution. However, after long-time work, the cable joint is affected by the environment to cause insulation damage of the cable joint, electric arcs are easy to generate due to insulation damage of the cable joint, local temperature is increased, safety accidents are easy to occur after long time running, and therefore insulation performance detection of the cable joint is particularly important, but the existing insulation detection circuit has the problems of complex circuit structure and poor working performance.
Disclosure of utility model
The utility model provides a visual intelligent junction box, which solves the problem of poor working performance of an insulation detection circuit in the related technology.
The technical scheme of the utility model is as follows:
The visual intelligent junction box comprises an arc detection circuit, a main control unit and a wireless communication unit, wherein the arc detection circuit is connected with the main control unit, the main control unit is in communication connection with a visual terminal by means of the wireless communication unit, the arc detection circuit comprises a current transformer P1, a resistor R8, a resistor R7, a diode D1, a diode D2, a diode D3, a diode D4 and a resistor R9,
The first end of the current transformer P1 is connected with the first end of the resistor R8, the second end of the current transformer P1 is connected with the second end of the resistor R8, the first end of the resistor R7 is connected with a 5V power supply, the second end of the resistor R7 is connected with the anode of the diode D1, the cathode of the diode D1 is connected with the anode of the diode D2, the cathode of the diode D2 is grounded, the anode of the diode D1 is connected with the second end of the resistor R8,
The cathode of the diode D3 is connected with a 3.3V power supply, the anode of the diode D3 is connected with the first end of the resistor R8, the cathode of the diode D4 is connected with the anode of the diode D3, the anode of the diode D4 is grounded, and the first end of the resistor R8 is connected with the first input end of the main control unit through the resistor R9.
Further, the utility model also comprises a voltage detection circuit, the voltage detection circuit comprises a voltage transformer T1, a diode D6, a capacitor C3, a resistor R2, a resistor R3, an operational amplifier U1 and a resistor R4, wherein a first input end of the voltage transformer T1 is connected with a live wire, a second input end of the voltage transformer T1 is connected with a zero line, a first output end of the voltage transformer T1 is connected with an anode of the diode D6, a second output end of the voltage transformer T1 is grounded, a cathode of the diode D6 is grounded through the capacitor C3, a cathode of the diode D6 is connected with a non-inverting input end of the operational amplifier U1 through the resistor R2, an inverting input end of the operational amplifier U1 is grounded through the resistor R3, an output end of the operational amplifier U1 is connected with an inverting input end of the operational amplifier U1 through the resistor R4, and an output end of the operational amplifier U1 is connected with a second input end of the main control unit.
Further, the utility model also comprises a frequency detection circuit, wherein the frequency detection circuit comprises a resistor R5, a resistor R6, an optocoupler U3, a resistor R14 and a switch tube Q1, wherein the first end of the resistor R5 is connected with a 5V power supply, the second end of the resistor R5 is grounded through the resistor R6, the second end of the resistor R5 is connected with the first input end of the optocoupler U3, the second input end of the optocoupler U3 is connected with the first output end of the voltage transformer T1, the first output end of the optocoupler U3 is connected with a 5V power supply, the second output end of the optocoupler U3 is connected with the control end of the switch tube Q1 through the resistor R14, the first end of the switch tube Q1 is connected with the 5V power supply, the second end of the switch tube Q1 is grounded, and the first end of the switch tube Q1 is connected with the third input end of the main control unit.
Further, the utility model also comprises a temperature detection circuit, wherein the temperature detection circuit comprises a resistor R15, a thermistor RT, an operational amplifier U4 and a resistor R17, the first end of the resistor R15 is connected with a 5V power supply, the second end of the resistor R15 is grounded through the thermistor RT, the second end of the resistor R15 is connected with the non-inverting input end of the operational amplifier U4, the inverting input end of the operational amplifier U4 is connected with Vref reference low voltage, the output end of the operational amplifier U4 is connected with the inverting input end of the operational amplifier U4 through the resistor R17, and the output end of the operational amplifier U4 is connected with the fourth input end of the main control unit.
Further, the utility model also comprises a protection circuit, wherein the protection circuit comprises an optocoupler U2, a resistor R11, a resistor R10, a switch tube Q4 and a relay K1, a first input end of the optocoupler U2 is connected with a first output end of the main control unit, a second input end of the optocoupler U2 is grounded, a first output end of the optocoupler U2 is connected with a 5V power supply through the resistor R11, a second output end of the optocoupler U2 is connected with a control end of the switch tube Q41 through the resistor R10, a first end of the switch tube Q4 is connected with a first input end of the relay K1, a second input end of the relay K1 is connected with a 5V power supply, a second end of the switch tube Q4 is grounded, a public end of the relay K1 is connected with electric equipment, and a normally-closed end of the relay K1 is connected with a power grid.
The working principle and the beneficial effects of the utility model are as follows:
In the utility model, the arc detection circuit is used for detecting whether an arc discharge phenomenon exists in a cable joint or a contact switch in the junction box, converting the detected arc into a corresponding electric signal and sending the corresponding electric signal to the main control unit, and when the arc discharge phenomenon occurs in the junction box, the main control unit sends the arc discharge signal to the visual terminal through the wireless communication unit to inform corresponding staff.
When the cable joint or the contact in the junction box generates an electric arc, a current signal is generated, and whether the electric arc is generated or not can be judged by detecting the current signal generated during the electric arc discharge. The arc detection circuit has the following working principle: the current transformer P1 is used for detecting a current signal generated when an electric arc occurs, when the electric arc occurs, the current transformer P1 outputs a current signal, the current signal is converted into a voltage signal through the resistor R8, and the current signal output by the current transformer P1 is very weak, so that the amplitude after the current signal is converted into the voltage is smaller than 1V. The current output by the current transformer P1 is an ac signal, and the main control unit cannot process the negative voltage signal, so that the ac voltage signal needs to be processed. The resistor R7, the diode D1 and the diode D2 form a voltage lifting circuit, the conduction voltage drop of one diode is 0.7V, the conduction voltage drop of two diodes is 1.4V, the alternating current voltage signal can be lifted by 1.4V as a whole, and the main control unit can judge whether an electric arc can influence the whole power distribution system according to the voltage.
When the current generated by arc discharge is overlarge or the junction box is struck by lightning outdoors, the voltage signal output by the arc detection circuit can far exceed the bearable range of the main control unit, so that the main control unit is damaged, and corresponding protection measures are needed. The diode D3 and the diode D4 constitute a limiter circuit, and when a pulse voltage greater than 3.3V is generated, the diode D3 is turned on, the output voltage is clamped at around 4V, and similarly, when a negative pulse smaller than 0 occurs, the diode D4 is turned on. The resistor R9 plays a role in limiting current, and prevents the current flowing through the main control unit from being too high when the voltage is too high, so that the working stability is improved.
Compared with the traditional arc detection circuit, the arc detection circuit has the advantages of simple circuit structure, stable circuit operation and good circuit working performance.
Drawings
The utility model will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is a circuit diagram of an arc detection circuit in accordance with the present utility model;
FIG. 2 is a circuit diagram of a voltage detection circuit according to the present utility model;
FIG. 3 is a circuit diagram of a frequency detection circuit according to the present utility model;
FIG. 4 is a circuit diagram of a temperature detection circuit according to the present utility model;
Fig. 5 is a circuit diagram of the protection circuit in the present utility model.
Detailed Description
The technical solutions of the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1
As shown in fig. 1, this embodiment provides a visual intelligent junction box, including an arc detection circuit, a main control unit and a wireless communication unit, the main control unit is connected with the main control unit by means of the wireless communication unit and is connected with a visual terminal communication, the arc detection circuit includes a current transformer P1, a resistor R8, a resistor R7, a diode D1, a diode D2, a diode D3, a diode D4 and a resistor R9, the first end of the current transformer P1 is connected with the first end of the resistor R8, the second end of the current transformer P1 is connected with the second end of the resistor R8, the first end of the resistor R7 is connected with a 5V power supply, the second end of the resistor R7 is connected with the anode of the diode D1, the cathode of the diode D1 is connected with the anode of the diode D2, the cathode of the diode D2 is grounded, the anode of the diode D1 is connected with the second end of the resistor R8, the cathode of the diode D3 is connected with the 3.3V power supply, the anode of the diode D3 is connected with the first end of the resistor R8, the anode of the diode D4 is connected with the anode of the diode D3, and the first end of the main control unit is connected with the first end of the resistor R9.
In this embodiment, the arc detection circuit is used for detecting whether there is an arc discharge phenomenon in the cable joint or the contact switch in the junction box, and converts the detected arc into a corresponding electric signal and sends the corresponding electric signal to the main control unit, when the arc discharge phenomenon occurs in the junction box, the main control unit sends the arc discharge signal to the visual terminal through the wireless communication unit, and informs corresponding staff.
When the cable joint or the contact in the junction box generates an electric arc, a current signal is generated, and whether the electric arc is generated or not can be judged by detecting the current signal generated during the electric arc discharge.
Specifically, the arc detection circuit works according to the following principle: the current transformer P1 is used for detecting a current signal generated when an electric arc occurs, when the electric arc occurs, the current transformer P1 outputs a current signal, the current signal is converted into a voltage signal through the resistor R8, and the current signal output by the current transformer P1 is very weak, so that the amplitude after the current signal is converted into the voltage is smaller than 1V. The current output by the current transformer P1 is an ac signal, and the main control unit cannot process the negative voltage signal, so that the ac voltage signal needs to be processed. The resistor R7, the diode D1 and the diode D2 form a voltage lifting circuit, the conduction voltage drop of one diode is 0.7V, the conduction voltage drop of two diodes is 1.4V, the alternating current voltage signal can be lifted by 1.4V as a whole, and the main control unit can judge whether an electric arc can influence the whole power distribution system according to the voltage.
When the current generated by arc discharge is overlarge or the junction box is struck by lightning outdoors, the voltage signal output by the arc detection circuit can far exceed the bearable range of the main control unit, so that the main control unit is damaged, and corresponding protection measures are needed. The diode D3 and the diode D4 constitute a limiter circuit, and when a pulse voltage greater than 3.3V is generated, the diode D3 is turned on, the output voltage is clamped at around 4V, and similarly, when a negative pulse smaller than 0 occurs, the diode D4 is turned on. The resistor R9 plays a role in limiting current, and prevents the current flowing through the main control unit from being too high when the voltage is too high, so that the working stability is improved.
The arc detection circuit in the embodiment has a simple circuit structure and stable circuit operation.
Further, still include positioning module in this embodiment, positioning module is connected with the main control unit electricity, when the junction box appears electric arc trouble, can look over the concrete place of junction box that breaks down through visual terminal, improve staff's troubleshooting efficiency.
As shown in fig. 2, the embodiment further includes a voltage detection circuit, the voltage detection circuit includes a voltage transformer T1, a diode D6, a capacitor C3, a resistor R2, a resistor R3, an operational amplifier U1 and a resistor R4, the first input end of the voltage transformer T1 is connected to the live wire, the second input end of the voltage transformer T1 is connected to the zero line, the first output end of the voltage transformer T1 is connected to the anode of the diode D6, the second output end of the voltage transformer T1 is grounded, the cathode of the diode D6 is grounded through the capacitor C3, the cathode of the diode D6 is connected to the non-inverting input end of the operational amplifier U1 through the resistor R2, the inverting input end of the operational amplifier U1 is grounded through the resistor R3, the output end of the operational amplifier U1 is connected to the inverting input end of the operational amplifier U1, and the output end of the operational amplifier U1 is connected to the second input end of the main control unit.
The stability of distribution voltage output by the distribution box plays a vital role in normal operation of electric equipment, and the power supply voltage or high or low power supply voltage can not enable the normal operation of the electric equipment, and even causes damage of the electric equipment.
In this embodiment, the voltage transformer T1 is configured to convert an ac voltage into a small voltage signal, the diode D6 and the capacitor C3 form a rectifying and filtering circuit, and the rectifying and filtering circuit is configured to convert the ac signal into a dc signal, but the dc voltage is weak, and the operational amplifier U1 forms an amplifying circuit, and then sends the amplified voltage signal to the main control unit. And the main control unit judges whether the distribution voltage output by the junction box is within a reasonable range according to the electric signal output by the operational amplifier U1.
As shown in fig. 3, the embodiment further includes a frequency detection circuit, where the frequency detection circuit includes a resistor R5, a resistor R6, an optocoupler U3, a resistor R14, and a switching tube Q1, where a first end of the resistor R5 is connected to a 5V power supply, a second end of the resistor R5 is grounded through the resistor R6, a second end of the resistor R5 is connected to a first input end of the optocoupler U3, a second input end of the optocoupler U3 is connected to a first output end of the voltage transformer T1, a first output end of the optocoupler U3 is connected to a 5V power supply, a second output end of the optocoupler U3 is connected to a control end of the switching tube Q1 through the resistor R14, a first end of the switching tube Q1 is connected to a 5V power supply, a second end of the switching tube Q1 is grounded, and a first end of the switching tube Q1 is connected to a third input end of the main control unit.
The frequency of the power supply voltage of the electric equipment is also important, and the high frequency can cause overload of the equipment, generate extra heat and energy, possibly cause burning or short-circuit fault of the equipment, and seriously endanger the safety of an electric power system. Therefore, the present embodiment incorporates a frequency detection circuit.
The frequency detection circuit is composed of a resistor R5, a resistor R6, an optocoupler U3, a resistor R14 and a switching tube Q1, an alternating voltage signal output by a voltage transformer T1 is sent to a second input end of the optocoupler U3, when the alternating voltage signal is in a positive half cycle, the optocoupler U3 is cut off, the optocoupler U3 outputs a low level, the switching tube Q1 is cut off, and a first end of the switching tube Q1 outputs a high level signal; when the alternating current signal is in the negative half cycle, the optical coupler U3 is conducted, the optical coupler U3 outputs a high level, the switching tube Q1 is conducted, the first end of the switching tube Q1 outputs a low level signal, so that circulation is formed, the main control unit receives a square wave signal in the detection process, and the frequency of the distribution voltage can be judged according to the frequency of the square wave signal.
As shown in fig. 4, the embodiment further includes a temperature detection circuit, where the temperature detection circuit includes a resistor R15, a thermistor RT, an operational amplifier U4, a resistor R17, where a first end of the resistor R15 is connected to a 5V power supply, a second end of the resistor R15 is grounded through the thermistor RT, a second end of the resistor R15 is connected to a non-inverting input end of the operational amplifier U4, an inverting input end of the operational amplifier U4 is connected to a Vref reference low voltage, an output end of the operational amplifier U4 is connected to an inverting input end of the operational amplifier U4 through the resistor R17, and an output end of the operational amplifier U4 is connected to a fourth input end of the main control unit.
When the cable joint in the junction box has insulation faults, local temperature rise is caused, and fire is very easy to occur if the temperature is too high, so that the temperature detection circuit is added in the embodiment.
Specifically, the working principle of the temperature detection circuit is as follows: the thermistor RT is used for detecting the temperature of a cable joint in the junction box, when the temperature of the cable joint changes, the resistance value of the thermistor RT changes, the resistor R15 and the resistor RT form a voltage dividing circuit, the voltage on the thermistor RT changes, the voltage on the thermistor RT is amplified through the operational amplifier U4 for better identifying the voltage change on the thermistor RT, the amplified voltage is finally sent to the main control unit, and the main control unit judges the temperature change of the cable joint according to the voltage output by the operational amplifier U4.
As shown in fig. 5, the embodiment further includes a protection circuit, where the protection circuit includes an optocoupler U2, a resistor R11, a resistor R10, a switching tube Q4, and a relay K1, where a first input end of the optocoupler U2 is connected to a first output end of the main control unit, a second input end of the optocoupler U2 is grounded, a first output end of the optocoupler U2 is connected to a 5V power supply through the resistor R11, a second output end of the optocoupler U2 is connected to a control end of the switching tube Q41 through the resistor R10, a first end of the switching tube Q4 is connected to a first input end of the relay K1, a second input end of the relay K1 is connected to a 5V power supply, a second end of the switching tube Q4 is grounded, a common end of the relay K1 is connected to an electric device, and a normally closed end of the relay K1 is connected to a power grid.
When the distribution box fails in the distribution process, if no corresponding staff is used for processing, the electric equipment is affected or damaged directly, and for this purpose, a protection circuit is added.
Specifically, the working principle of the protection circuit is as follows: when any fault occurs, the first output end of the main control unit outputs a high-level signal, the optical coupler U2 is conducted, the optical coupler U2 outputs the high-level signal to the control end of the switching tube Q4, the switching tube Q4 is conducted, the relay K1 is electrically attracted, the normally closed end of the relay K1 is disconnected, and the electric equipment is powered off, so that the protection effect on the electric equipment is achieved. When the junction box works normally, the first output end of the main control unit outputs low level, the optocoupler U2 is cut off, the switching tube Q4 is cut off, the relay K1 is powered off, and the power grid is normally connected with the electric equipment.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (5)
1. The visualized intelligent junction box is characterized by comprising an arc detection circuit, a main control unit and a wireless communication unit, wherein the arc detection circuit is connected with the main control unit, the main control unit is in communication connection with a visualized terminal by means of the wireless communication unit, the arc detection circuit comprises a current transformer P1, a resistor R8, a resistor R7, a diode D1, a diode D2, a diode D3, a diode D4 and a resistor R9,
The first end of the current transformer P1 is connected with the first end of the resistor R8, the second end of the current transformer P1 is connected with the second end of the resistor R8, the first end of the resistor R7 is connected with a 5V power supply, the second end of the resistor R7 is connected with the anode of the diode D1, the cathode of the diode D1 is connected with the anode of the diode D2, the cathode of the diode D2 is grounded, the anode of the diode D1 is connected with the second end of the resistor R8,
The cathode of the diode D3 is connected with a 3.3V power supply, the anode of the diode D3 is connected with the first end of the resistor R8, the cathode of the diode D4 is connected with the anode of the diode D3, the anode of the diode D4 is grounded, and the first end of the resistor R8 is connected with the first input end of the main control unit through the resistor R9.
2. The visualized intelligent junction box according to claim 1, further comprising a voltage detection circuit, wherein the voltage detection circuit comprises a voltage transformer T1, a diode D6, a capacitor C3, a resistor R2, a resistor R3, an operational amplifier U1 and a resistor R4, a first input end of the voltage transformer T1 is connected with a live wire, a second input end of the voltage transformer T1 is connected with a zero line, a first output end of the voltage transformer T1 is connected with an anode of the diode D6, a second output end of the voltage transformer T1 is grounded, a cathode of the diode D6 is grounded through the capacitor C3, a cathode of the diode D6 is connected with an in-phase input end of the operational amplifier U1 through the resistor R2, an inverting input end of the operational amplifier U1 is grounded through the resistor R3, an output end of the operational amplifier U1 is connected with an inverting input end of the operational amplifier U1 through the resistor R4, and an output end of the operational amplifier U1 is connected with a second input end of the master control unit.
3. The visualized intelligent junction box according to claim 2, further comprising a frequency detection circuit, wherein the frequency detection circuit comprises a resistor R5, a resistor R6, an optocoupler U3, a resistor R14 and a switching tube Q1, a first end of the resistor R5 is connected with a 5V power supply, a second end of the resistor R5 is grounded through the resistor R6, a second end of the resistor R5 is connected with a first input end of the optocoupler U3, a second input end of the optocoupler U3 is connected with a first output end of the voltage transformer T1, a first output end of the optocoupler U3 is connected with a 5V power supply, a second output end of the optocoupler U3 is connected with a control end of the switching tube Q1 through the resistor R14, a first end of the switching tube Q1 is connected with a 5V power supply, a second end of the switching tube Q1 is grounded, and a first end of the switching tube Q1 is connected with a third input end of the main control unit.
4. The visualized intelligent junction box according to claim 1, further comprising a temperature detection circuit, wherein the temperature detection circuit comprises a resistor R15, a thermistor RT, an operational amplifier U4 and a resistor R17, the first end of the resistor R15 is connected with a 5V power supply, the second end of the resistor R15 is grounded through the thermistor RT, the second end of the resistor R15 is connected with the in-phase input end of the operational amplifier U4, the inverting input end of the operational amplifier U4 is connected with Vref reference low voltage, the output end of the operational amplifier U4 is connected with the inverting input end of the operational amplifier U4 through the resistor R17, and the output end of the operational amplifier U4 is connected with the fourth input end of the main control unit.
5. The visualized intelligent junction box according to claim 1, further comprising a protection circuit, wherein the protection circuit comprises an optocoupler U2, a resistor R11, a resistor R10, a switching tube Q4 and a relay K1, a first input end of the optocoupler U2 is connected with a first output end of the main control unit, a second input end of the optocoupler U2 is grounded, a first output end of the optocoupler U2 is connected with a 5V power supply through the resistor R11, a second output end of the optocoupler U2 is connected with a control end of the switching tube Q41 through the resistor R10, a first end of the switching tube Q4 is connected with a first input end of the relay K1, a second input end of the relay K1 is connected with a 5V power supply, a second end of the switching tube Q4 is grounded, a public end of the relay K1 is connected with electric equipment, and a normally closed end of the relay K1 is connected with a power grid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322639452.1U CN221039139U (en) | 2023-09-27 | 2023-09-27 | Visual intelligent junction box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322639452.1U CN221039139U (en) | 2023-09-27 | 2023-09-27 | Visual intelligent junction box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221039139U true CN221039139U (en) | 2024-05-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322639452.1U Active CN221039139U (en) | 2023-09-27 | 2023-09-27 | Visual intelligent junction box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221039139U (en) |
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2023
- 2023-09-27 CN CN202322639452.1U patent/CN221039139U/en active Active
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