Dry-type transformer state monitoring circuit, PCB and device

Abstract

The utility model discloses a dry-type transformer state monitoring circuit, a PCB (Printed Circuit Board) and a device. The circuit comprises a power supply unit, and a processing unit, a temperature detection unit, an IO (Input / Output) control unit, a communication unit and an alarm unit which are electrically connected with the power supply unit respectively, the temperature detection unit is used for acquiring working temperature information, and the output end of the temperature detection unit is connected with the input end of the processing unit; the IO control unit is electrically connected with the processing unit and is used for acquiring or adjusting the working state of the equipment; the input end of the communication unit is connected with the output end of the processing unit, and the output end of the communication unit is used for outputting processed information; the alarm unit is used for realizing abnormal alarm, and the input end of the alarm unit is connected with the output end of the processing unit; according to the circuit disclosed by the invention, on-site alarm of temperature abnormity can be realized through the alarm unit, temperature abnormity information can be fed back in time through the communication unit, the temperature abnormity problem can be solved in time, the operation and maintenance efficiency is improved, and the operation and maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer state monitoring, in particular to a dry-type transformer state monitoring circuit, a PCB board and a device. Background Art

[0002] At present, dry-type transformers have the problem of poor thermal balance performance during operation. In order to ensure the normal operation of dry-type transformers, the working status of dry-type transformers needs to be monitored; the dry-type transformer temperature controller is an important component for maintaining the operation of dry-type transformers, which can effectively prevent accidents caused by excessive temperature rise of the transformer; the dry-type transformer temperature controller can monitor the working temperature of the dry-type transformer and control the working status of the dry-type transformer according to the preset threshold value to ensure operation within a safe range. When the transformer temperature exceeds the preset safety threshold, the temperature controller will trigger a corresponding alarm or take automatic control measures, such as shutting down the power supply or adjusting the operating status of the fan to prevent overheating and protect the equipment from damage.

[0003] However, since the dry-type transformer temperature controller lacks communication and alarm functions, operation and maintenance personnel or on-site personnel are unable to respond to safety accidents in a timely manner, which reduces operation and maintenance efficiency and increases operation and maintenance costs.

[0004] It can be seen that the existing technology still needs to be improved and enhanced. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the utility model is to provide a dry-type transformer state monitoring circuit, which can achieve timely resolution of temperature anomaly problems and has the advantages of high operation and maintenance efficiency and low operation and maintenance cost.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A dry-type transformer state monitoring circuit comprises a power supply unit and a processing unit, a temperature detection unit, an IO control unit, a communication unit and an alarm unit which are electrically connected to the power supply unit respectively; the temperature detection unit is used to obtain working temperature information, and the output end of the temperature detection unit is connected to the input end of the processing unit; the IO control unit is used to obtain or adjust the working state of the equipment, and the IO control unit is electrically connected to the processing unit; the input end of the communication unit is connected to the output end of the processing unit, and the output end of the communication unit is used to output processed information; the input end of the alarm unit is connected to the output end of the processing unit, and the alarm unit is used to realize abnormal alarm.

[0008] In the dry-type transformer state monitoring circuit, the IO control unit includes an IO output control unit and an IO input detection unit, the input end of the IO input detection unit is used to obtain the working state of the equipment, and the output end of the IO input detection unit is connected to the input end of the processing unit; the input end of the IO output control unit is connected to the output end of the processing unit, and the output end of the IO output control unit is used to output equipment adjustment instructions.

[0009] In the dry-type transformer state monitoring circuit, the IO output control unit includes a receiving group and multiple IO control groups, the input end of the receiving group is connected to the output end of the processing unit, the output end of the receiving group is respectively connected to the input ends of the multiple IO control groups, and the output ends of the multiple IO control groups are used to output device adjustment instructions; the IO input detection unit includes multiple IO detection groups, the input ends of the multiple IO detection groups are used to obtain the working status of the equipment, and the output ends of the multiple IO detection groups are respectively connected to the input end of the processing unit.

[0010] In the dry-type transformer state monitoring circuit, the power supply unit includes a first voltage conversion part, a second voltage conversion part and a third voltage conversion part, the input end of the first voltage conversion part is used to connect to an external power supply device, the output end of the first voltage conversion part is connected to the input end of the second voltage conversion part, the output end of the second voltage conversion part is respectively connected to the input end of the third voltage conversion part, the power supply end of the communication unit, the power supply end of the IO output control part and the power supply end of the temperature detection unit; the output end of the third voltage conversion part is respectively connected to the power supply end of the IO input detection part and the power supply end of the processing unit; the output end of the first voltage conversion part is used to output a 24V DC voltage, the output end of the second voltage conversion part is used to output a 5V DC voltage, and the output end of the third voltage conversion part is used to output a 3.3V DC voltage.

[0011] In the dry-type transformer state monitoring circuit, the temperature detection unit includes a fourth voltage conversion unit and multiple temperature detection units, the input end of the fourth voltage conversion unit is connected to the output end of the second voltage conversion unit, the output end of the fourth voltage conversion unit is respectively connected to the power supply ends of the multiple temperature detection units, and the output end of the fourth voltage conversion unit is used to output a 2.5V DC voltage; the output ends of the multiple temperature detection units are respectively connected to the input end of the processing unit.

[0012] In the dry-type transformer status monitoring circuit, the alarm unit includes an LED indicator and a buzzer alarm unit, the power supply end of the LED indicator and the power supply end of the buzzer alarm unit are respectively connected to the output end of the power supply unit, and the input end of the LED indicator and the input end of the buzzer alarm unit are respectively connected to the output end of the processing unit; the LED indicator and the buzzer alarm unit are used to realize sound and light alarm.

[0013] The dry-type transformer state monitoring circuit further includes a human-machine interaction unit electrically connected to the processing unit, and the human-machine interaction unit is used to realize information interaction between the dry-type transformer state monitoring circuit and the staff.

[0014] In the dry-type transformer state monitoring circuit, the human-computer interaction unit includes a plurality of button parts and an LCD display part, and the output ends of the plurality of button parts are respectively connected to the input end of the processing unit; the power supply end of the LCD display part is connected to the output end of the power supply unit, and the input end of the LCD display part is connected to the output end of the processing unit.

[0015] The present application also correspondingly discloses a PCB board, on which any of the above-mentioned dry-type transformer state monitoring circuits is printed.

[0016] The present application also correspondingly discloses a dry-type transformer state monitoring device, wherein the dry-type transformer state monitoring device adopts the dry-type transformer state monitoring circuit as described in any one of the above items to realize operation control.

[0017] Beneficial effects:

[0018] The utility model provides a dry-type transformer state monitoring circuit. The temperature detection unit feeds back real-time temperature information to the processing unit. When there is an abnormal temperature problem, an on-site alarm is realized through the alarm unit. The abnormal temperature information is fed back in time through the communication unit, so that the abnormal temperature problem can be solved in time, the operation and maintenance efficiency is improved, and the operation and maintenance cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A circuit block diagram of a dry-type transformer state monitoring circuit provided by the utility model;

[0020] Figure 2 A circuit structure diagram of the processing unit provided by the utility model;

[0021] Figure 3 A circuit diagram of a communication unit provided by the utility model;

[0022] Figure 4 A circuit structure diagram of the power supply unit provided by the utility model;

[0023] Figure 5 This is a circuit diagram of the IO control unit provided by the utility model;

[0024] Figure 6 A circuit diagram of a temperature detection unit provided by the utility model;

[0025] Figure 7 A circuit diagram of the alarm unit provided by the utility model;

[0026] Figure 8 This is a circuit structure diagram of the human-computer interaction unit provided by the utility model.

[0027] Explanation of main component symbols: 1-power supply unit, 11-first voltage conversion unit, 12-second voltage conversion unit, 13-third voltage conversion unit, 2-processing unit, 3-temperature detection unit, 31-fourth voltage conversion unit, 32-temperature detection unit, 4-IO control unit, 41-IO output control unit, 42-IO input detection unit, 5-communication unit, 6-alarm unit, 61-LED indication unit, 62-buzzer alarm unit, 7-human-computer interaction unit, 71-button unit, 72-LCD display unit. DETAILED DESCRIPTION

[0028] The utility model provides a dry-type transformer state monitoring circuit, PCB board and device. In order to make the purpose, technical solution and effect of the utility model clearer and more specific, the utility model is further described in detail with reference to the accompanying drawings and examples.

[0029] In the description of the present invention, it should be understood that the terms "installation", "connection" and the like should be understood in a broad sense. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] See also Figures 1 to 8 The utility model provides a dry-type transformer state monitoring circuit, including a power supply unit 1 and a processing unit 2, a temperature detection unit 3, an IO control unit 4, a communication unit 5 and an alarm unit 6 electrically connected to the power supply unit 1 respectively; the temperature detection unit 3 is used to obtain working temperature information, and the output end of the temperature detection unit 3 is connected to the input end of the processing unit 2; the IO control unit 4 is used to obtain or adjust the working state of the equipment, and the IO control unit 4 is electrically connected to the processing unit 2; the input end of the communication unit 5 is connected to the output end of the processing unit 2, and the output end of the communication unit 5 is used to output processed information; the input end of the alarm unit 6 is connected to the output end of the processing unit 2, and the alarm unit 6 is used to realize abnormal alarm.

[0031] The present application discloses a dry-type transformer status monitoring circuit, in which a temperature detection unit 3 feeds back real-time temperature information to a processing unit 2. When there is a temperature abnormality problem, the processing unit 2 outputs a control instruction to an IO control unit 4 to adjust the working state of the corresponding device, and controls an alarm unit 6 and a communication unit 5 to start working. An on-site alarm is realized through the alarm unit 6, and temperature abnormality information is fed back in time through the communication unit 5, so that the temperature abnormality problem can be solved in time, the operation and maintenance efficiency can be improved, and the operation and maintenance cost can be reduced.

[0032] In this example, see Figure 2 , the processing unit 2 includes an MCU controller composed of a control chip U1A and a control chip U1B, the control chip U1A and the control chip U1B are electrically connected through an electrical socket; pins 17, 30, 39, 52, 62, 72, 84, 95, 108, 121, 131, 144, 33, 32 and 143 of the control chip U1A are respectively connected to the output end of the third voltage conversion unit 13; the output end of the communication unit 5 is connected to pins 111 and 112 of the control chip U1B; the input end of the IO output control unit 41 is respectively connected to pins 80, 81, 82, 91, 92 and 93 of the control chip U1B; the output end of the IO input detection unit 42 is respectively connected to the pins 111, 112, 112, 113 and 113 of the control chip U1B; the output end of the IO output control unit 41 is respectively connected to the pins 111, 112 and 113 of the control chip U1B; the output end of the IO input detection unit 42 is respectively connected to the pins 111, 112 ... input detection unit 42 is respectively connected to the pins 111, 112 and 113 of the control chip U1B; the output end of the IO input detection unit 42 is respectively connected to the pins 111, 112 The temperature detection unit 3 is connected to the pins 87, 88, 89 and 90 of the control chip U1B; the output end of the temperature detection unit 3 is respectively connected to the pins 18, 19, 20 and 21 of the control chip U1B; the input end of the LED indication unit 61 is respectively connected to the pins 133, 134, 135, 139, 140, 1, 141 and 142 of the control chip U1B, and the input end of the buzzer alarm unit 62 is connected to the pin 7 of the control chip U1B; the input end of the LCD display unit is respectively connected to the pin 76 of the control chip U1A and the pins 4, 114, 115, 85, 86, 58, 59, 60, 61, 62, 63, 64, 65, 67 and 68 of the control chip U1B.

[0033] In this example, see Figure 3The communication unit 5 is used to realize the 485 communication between the dry-type transformer state monitoring device and the external control device; the communication unit 5 includes a fifth control chip U5, a first connector T1, a sixth control chip U6, a seventh control chip U7, a twenty-third capacitor C23, a twenty-fourth capacitor C24, a first voltage regulator tube TVS1, a second voltage regulator tube TVS2, a third voltage regulator tube TVS3, a first fuse F1 and a second fuse F2; the fifth control chip U5 is used to convert a 5V DC voltage into a 3.3V DC voltage, and the first connector T1 is used to The electrical connection between the second voltage conversion unit 12 and the communication unit 5 is realized; the pin 2 of the first connector T1 and the pin 2 of the fifth control chip U5 are respectively connected to the output end of the second voltage conversion unit 12; the pin 3 of the fifth control chip U5 is connected to the pin 1 and the pin 7 of the sixth control chip U6, and the pin 4 of the first connector T1 is respectively connected to the pin 10 and the pin 16 of the sixth control chip U6 and the pin 8 of the seventh control chip U7; the pins 3 to 5 of the sixth control chip U6 are used to connect to the external device The 485 communication connection is established, the pin 14 of the sixth control chip U6 is respectively connected to the pin 2 to the pin 4 of the seventh control chip U7, the pin 12 and the pin 13 of the sixth control chip U6 are respectively connected to the pin 1 and the pin 4 of the seventh control chip U7; the pin 6 of the seventh control chip U7 is respectively connected to one end of the twenty-third capacitor C23, one end of the first voltage regulator tube TVS1, one end of the second voltage regulator tube TVS2 and one end of the first fuse F1; the pin 7 of the seventh control chip U7 is respectively connected to one end of the twenty-third capacitor C23, one end of the first voltage regulator tube TVS1, one end of the second voltage regulator tube TVS2 and one end of the first fuse F1; The other end of the twenty-fourth capacitor C24 is connected to the other end of the third voltage regulator tube TVS3, the other end of the second voltage regulator tube TVS2 and one end of the second fuse F2; the other end of the twenty-third capacitor C23 is connected to one end of the second twenty-fourth capacitor C24, and the other end of the first voltage regulator tube TVS1 is connected to one end of the second voltage regulator tube TVS2; the other end of the first fuse F1 and the other end of the second fuse F2 are respectively connected to pin 111 and pin 112 of the control chip U1B.

[0034] In this embodiment, the model of the fifth control chip U5 is LM1117, the model of the sixth control chip U6 is MAX1480, and the model of the seventh control chip U7 is MAX485.

[0035] In other embodiments, the communication unit 5 may also include an existing Ethernet communication interface circuit for realizing wireless communication to meet the usage requirements of different scenarios.

[0036] For further information, see Figure 5The IO control unit 4 includes an IO output control unit 41 and an IO input detection unit 42. The input end of the IO input detection unit 42 is used to obtain the working status of the device, and the output end of the IO input detection unit 42 is connected to the input end of the processing unit 2; the input end of the IO output control unit 41 is connected to the output end of the processing unit 2, and the output end of the IO output control unit 41 is used to output device adjustment instructions.

[0037] For further information, see Figure 5 The IO output control unit 41 includes a receiving group and multiple IO control groups, the input end of the receiving group is connected to the output end of the processing unit 2, the output end of the receiving group is respectively connected to the input ends of the multiple IO control groups, and the output ends of the multiple IO control groups are used to output device adjustment instructions; the IO input detection unit 42 includes multiple IO detection groups, the input ends of the multiple IO detection groups are used to obtain the working status of the device, and the output ends of the multiple IO detection groups are respectively connected to the input end of the processing unit 2.

[0038] In this embodiment, the IO output control unit 41 includes 5 IO control groups; see Figure 5 , the structures of the multiple IO control groups are consistent; the receiving group includes a fourth control chip U4, the IO control group includes a second resistor R2, a fifth diode D5 and a first switch JDQ1, and the pins 1, 2, 3, 4, 5, and 7 of the fourth control chip U4 are respectively connected to the pins 80, 81, 82, 91, 92, and 93 of the control chip U1B; the pins 10, 13, 14, 15, and 16 of the fourth control chip U4 are respectively connected to the input ends of the multiple IO control groups; for example, the pins of the fourth control chip U4 13 are respectively connected to the cathode of the fifth diode D5 and the pin 2 of the first switch JDQ1, the anode of the fifth diode D5 is connected to one end of the second resistor R2, the other end of the second resistor R2 is connected to the pin 1 of the first switch JDQ1, and the pins 4 and 3 of the first switch JDQ1 are used to output device control signals; the function of the IO output control unit 41 is to control the state of the output signal, for example, to start, stop, adjust or switch a certain device or component, and the device can be a switch, a motor, a light, a fan, etc.

[0039] In this embodiment, the model of the fourth control chip U4 is LM1117.

[0040] In this embodiment, the IO input detection unit 42 includes four IO detection groups, see Figure 5, the structures of multiple IO detection groups are consistent; for example, the IO detection group includes a third resistor R3, a first optocoupler O1 and a fifth resistor R5, one end of the third resistor R3 is used to receive a signal fed back by an external device, the other end of the third resistor R3 is connected to pin 1 of the first optocoupler O1, pins 3 and pin 3 of the first optocoupler O1 are respectively grounded, pin 4 of the first optocoupler O1 is respectively connected to pin 88 of the control chip U1B and one end of the fifth resistor R5, one end of the fifth resistor R3 is connected to the output end of the third voltage conversion unit 13; the function of the IO input detection unit 42 is to detect the state of the input signal, such as detecting the triggering or change of a button, sensor or other external signal, for monitoring and responding to external events or control system inputs.

[0041] For further information, see Figure 4 The power supply unit 1 includes a first voltage conversion unit 11, a second voltage conversion unit 12 and a third voltage conversion unit 13. The input end of the first voltage conversion unit 11 is used to connect to an external power supply device, the output end of the first voltage conversion unit 11 is connected to the input end of the second voltage conversion unit 12, and the output end of the second voltage conversion unit 12 is respectively connected to the input end of the third voltage conversion unit 13, the power supply end of the communication unit 5, the power supply end of the IO output control unit 41 and the power supply end of the temperature detection unit 3; the output end of the third voltage conversion unit 13 is respectively connected to the power supply end of the IO input detection unit 42 and the power supply end of the processing unit 2; the output end of the first voltage conversion unit 11 is used to output a 24V DC voltage, the output end of the second voltage conversion unit 12 is used to output a 5V DC voltage, and the output end of the third voltage conversion unit 13 is used to output a 3.3V DC voltage.

[0042] In this example, see Figure 4, the first voltage conversion unit 11 includes a second control chip U2, the second voltage conversion unit 12 includes a second diode D2, a first capacitor C1, a second capacitor C2 and a first resistor R1, and the third voltage conversion unit 13 includes a third diode D3 and a third control chip U3; pins 1 and 2 of the second control chip U2 are respectively used to connect an external power supply device, the external power supply device is a mains power supply, and pin 8 of the second control chip U2 is used to output a 24V DC voltage; the anode of the second diode D2 is connected to pin 6 of the second control chip U2, the cathode of the second diode D2 is respectively connected to one end of the first capacitor C1, the anode of the second capacitor C2, the anode of the third diode D2 and one end of the first resistor R1, and the other end of the first resistor R1 is used to output a 5V DC voltage; the cathode of the third diode D3 is connected to pin 2 of the third control chip U3, and pin 3 of the third control chip U3 is used to output a 3.3V DC voltage; the other end of the first capacitor C1 and the cathode of the second capacitor C2 are grounded respectively.

[0043] In this embodiment, the model of the second control chip U2 is AH8665, and the model of the third control chip U3 is LM7805.

[0044] For further information, see Figure 6 The temperature detection unit 3 includes a fourth voltage conversion unit 31 and multiple temperature detection units 32, the input end of the fourth voltage conversion unit 31 is connected to the output end of the second voltage conversion unit 12, the output end of the fourth voltage conversion unit 31 is respectively connected to the power supply ends of the multiple temperature detection units 32, and the output end of the fourth voltage conversion unit 31 is used to output a 2.5V DC voltage; the output ends of the multiple temperature detection units 32 are respectively connected to the input end of the processing unit 2.

[0045] In this embodiment, the temperature detection unit 3 includes four temperature detection parts 32; see Figure 6, the structures of the multiple temperature detection parts 32 are consistent; the fourth voltage conversion part 31 is used to output a 2.5V DC working voltage, the fourth voltage conversion part 31 includes an eighth control chip U8, a thirtieth resistor R30, a ninth voltage regulator U9, a thirty-second capacitor C32 and a thirty-third capacitor C33, the temperature detection part 32 includes a tenth operational amplifier component U10, the tenth operational amplifier component U10 is composed of four operational amplifiers, namely U10A, U10B, U10C and U10D, the pin 2 of the eighth control chip U8 is connected to the cathode of the second diode D2, the pin 3 of the eighth control chip U8 is respectively connected to one end of the thirtieth resistor R30 and the pin 4 of the operational amplifier U10A, the other end of the thirtieth resistor R30 is connected to the pin 2 and pin 1 of the ninth voltage regulator U9, the thirtieth One end of the second capacitor C32 and one end of the thirty-third capacitor C33 are connected, one end of the thirty-third capacitor C33 is connected to pin 5 of the operational amplifier U10B and pin 10 of the operational amplifier U10C, pin 3 of the ninth voltage regulator tube U9, the other end of the thirty-second capacitor C32 and the other end of the thirty-third capacitor C33 are grounded respectively; pin 7 of the operational amplifier U10B and pin 8 of the operational amplifier U10C are respectively connected to pin 12 and pin 13 of the operational amplifier U10D, and pin 14 of the operational amplifier U10D is connected to pin 18 of the control chip U10B; pin 6 of the operational amplifier U10B is also connected to its pin 7, and pin 9 of the operational amplifier U10C is also connected to its pin 8; the temperature detection unit 32 amplifies the detection signal and realizes feedback of the detection signal through the operational amplifier.

[0046] In this embodiment, the model of the eighth control chip U8 is LM1117.

[0047] For further information, see Figure 7 The alarm unit 6 includes an LED indicator part 61 and a buzzer alarm part 62, the power supply end of the LED indicator part 61 and the power supply end of the buzzer alarm part 62 are respectively connected to the output end of the power supply unit 1, and the input end of the LED indicator part 61 and the input end of the buzzer alarm part 62 are respectively connected to the output end of the processing unit 2; the LED indicator part 61 and the buzzer alarm part 62 are used to realize sound and light alarm.

[0048] In this example, see Figure 7The LED indicating unit 61 includes eight indicator lights LED1-LED8, the positive poles of the eight indicator lights LED1-LED8 are respectively connected to the output end of the third voltage conversion unit 13, and the negative poles of the eight indicator lights LED1-LED8 are respectively connected to the pins 133, 134, 135, 139, 140, 1, 141 and 142 of the control chip U1B; the control chip U1B outputs a control signal to control different indicator lights to start working, so as to indicate different working states of the dry-type transformer status monitoring device and realize on-site light alarm.

[0049] In this example, see Figure 7 The buzzer alarm unit 62 includes a first transistor Q1 and a buzzer B1, the base of the first transistor Q1 is connected to pin 7 of the control chip U1B, the collector of the first transistor Q1 is connected to pin 2 of the buzzer B1, the pin 1 of the buzzer B1 is connected to the output end of the third voltage conversion unit 13, and the emitter of the first transistor Q1 is grounded; when there is a temperature abnormality problem, the control chip U1B outputs a control signal to control the first transistor Q1 to turn on, so as to control the buzzer B1 to start working, thereby realizing an on-site sound alarm.

[0050] For further information, see Figure 1 and Figure 8 The dry-type transformer state monitoring circuit also includes a human-machine interaction unit 7 electrically connected to the processing unit 2, and the human-machine interaction unit 7 is used to realize information interaction between the dry-type transformer state monitoring circuit and the staff.

[0051] For further information, see Figure 8 The human-computer interaction unit 7 includes a plurality of button parts 71 and an LCD display part 72, and the output ends of the plurality of button parts 71 are respectively connected to the input ends of the processing unit 2; the power supply end of the LCD display part 72 is connected to the output end of the power supply unit 1, and the input end of the LCD display part 72 is connected to the output end of the processing unit 2.

[0052] In this embodiment, the human-machine interaction unit 7 includes 6 button parts 71, and the staff triggers the corresponding buttons to adjust the working state of the dry-type transformer state monitoring device; please refer to Figure 8 The structures of the multiple button parts 71 are consistent. For example, the button part 71 includes a first button S1 and a fourteenth capacitor C14; pin 1 and pin 4 of the first button S1 and one end of the fourteenth capacitor C14 are respectively connected to pin 17 of the control chip U1B, and pins 2 and 3 of the first button S1 and the other end of the fourteenth capacitor C14 are respectively grounded.

[0053] In this example, see Figure 8 The LCD display unit 72 is used to display the information obtained and processed by the dry-type transformer state monitoring device; the LCD display unit 72 includes a second transistor Q2, a twenty-second resistor R22, a twenty-fourth resistor R24, a twenty-fifth resistor R25, a twenty-sixth resistor R26, a third transistor Q3 and a chip LCD; the emitter of the third transistor Q2 and one end of the twenty-second resistor R22 are respectively connected to the output end of the third voltage conversion unit 13, the base of the third diode Q2 is connected to the pin 42 of the control chip U1B, the collector of the second transistor Q2, the other end of the twenty-second resistor R22 and the pin 76 of the control chip U1A are respectively connected to the base of the third transistor Q3 The twenty-fourth resistor R24 ​​is connected to the pin 36 of the chip LCD, one end of the twenty-fifth resistor R25 is connected to the pin 35 of the chip LCD, one end of the twenty-sixth resistor R26 is connected to the pin 34 of the chip LCD, the other end of the twenty-fourth resistor R24, the other end of the twenty-fifth resistor R25 and the other end of the twenty-sixth resistor R26 are respectively connected to the collector of the third transistor Q3, and the emitter of the third transistor Q3 is grounded; pins 17 to pin 32 of the chip LCD are respectively connected to pins 4, 114, 115, 85, 86, 58, 59, 60, 61, 62, 63, 64, 65, 67 and 68 of the control chip U1B.

[0054] The present application also correspondingly discloses a PCB board, on which any of the above-mentioned dry-type transformer state monitoring circuits is printed.

[0055] The present application also correspondingly discloses a dry-type transformer state monitoring device, wherein the dry-type transformer state monitoring device adopts the dry-type transformer state monitoring circuit as described in any one of the above items to realize operation control.

[0056] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and the utility model concept of the utility model, and all these changes or substitutions should fall within the protection scope of the utility model.

Claims

1. A dry-type transformer state monitoring circuit, characterized in that: It includes a power supply unit and a processing unit, a temperature detection unit, an IO control unit, a communication unit and an alarm unit which are electrically connected to the power supply unit respectively; the temperature detection unit is used to obtain working temperature information, and the output end of the temperature detection unit is connected to the input end of the processing unit; the IO control unit is used to obtain or adjust the working state of the equipment, and the IO control unit is electrically connected to the processing unit; the input end of the communication unit is connected to the output end of the processing unit, and the output end of the communication unit is used to output processed information; the input end of the alarm unit is connected to the output end of the processing unit, and the alarm unit is used to realize abnormal alarm.

2. A dry-type transformer state monitoring circuit according to claim 1, characterized in that: The IO control unit includes an IO output control unit and an IO input detection unit. The input end of the IO input detection unit is used to obtain the working status of the device, and the output end of the IO input detection unit is connected to the input end of the processing unit; the input end of the IO output control unit is connected to the output end of the processing unit, and the output end of the IO output control unit is used to output device adjustment instructions.

3. A dry-type transformer state monitoring circuit according to claim 2, characterized in that: The IO output control unit includes a receiving group and multiple IO control groups, the input end of the receiving group is connected to the output end of the processing unit, the output end of the receiving group is respectively connected to the input ends of the multiple IO control groups, and the output ends of the multiple IO control groups are used to output device adjustment instructions; the IO input detection unit includes multiple IO detection groups, the input ends of the multiple IO detection groups are used to obtain the working status of the device, and the output ends of the multiple IO detection groups are respectively connected to the input end of the processing unit.

4. A dry-type transformer state monitoring circuit according to claim 2, characterized in that: The power supply unit includes a first voltage conversion unit, a second voltage conversion unit and a third voltage conversion unit, the input end of the first voltage conversion unit is used to connect to an external power supply device, the output end of the first voltage conversion unit is connected to the input end of the second voltage conversion unit, the output end of the second voltage conversion unit is respectively connected to the input end of the third voltage conversion unit, the power supply end of the communication unit, the power supply end of the IO output control unit and the power supply end of the temperature detection unit; the output end of the third voltage conversion unit is respectively connected to the power supply end of the IO input detection unit and the power supply end of the processing unit; the output end of the first voltage conversion unit is used to output a 24V DC voltage, the output end of the second voltage conversion unit is used to output a 5V DC voltage, and the output end of the third voltage conversion unit is used to output a 3.3V DC voltage.

5. A dry-type transformer state monitoring circuit according to claim 4, characterized in that: The temperature detection unit includes a fourth voltage conversion unit and multiple temperature detection units, the input end of the fourth voltage conversion unit is connected to the output end of the second voltage conversion unit, the output end of the fourth voltage conversion unit is respectively connected to the power supply ends of the multiple temperature detection units, and the output end of the fourth voltage conversion unit is used to output a 2.5V DC voltage; the output ends of the multiple temperature detection units are respectively connected to the input end of the processing unit.

6. A dry-type transformer state monitoring circuit according to claim 1, characterized in that: The alarm unit includes an LED indicator part and a buzzer alarm part. The power supply end of the LED indicator part and the power supply end of the buzzer alarm part are respectively connected to the output end of the power supply unit, and the input end of the LED indicator part and the input end of the buzzer alarm part are respectively connected to the output end of the processing unit; the LED indicator part and the buzzer alarm part are used to realize sound and light alarm.

7. A dry-type transformer state monitoring circuit according to claim 1, characterized in that: It also includes a human-machine interaction unit electrically connected to the processing unit, and the human-machine interaction unit is used to realize information interaction between the dry-type transformer state monitoring circuit and the staff.

8. A dry-type transformer state monitoring circuit according to claim 7, characterized in that: The human-computer interaction unit includes a plurality of button parts and an LCD display part, the output ends of the plurality of button parts are respectively connected to the input end of the processing unit; the power supply end of the LCD display part is connected to the output end of the power supply unit, and the input end of the LCD display part is connected to the output end of the processing unit.

9. A PCB board, characterized in that: The PCB board is printed with the dry-type transformer state monitoring circuit as described in any one of claims 1 to 8.

10. A dry-type transformer state monitoring device, characterized in that: The dry-type transformer state monitoring device adopts the dry-type transformer state monitoring circuit described in any one of claims 1 to 8 to realize operation control.

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