Temperature and humidity detection circuit, circuit board and device

Abstract

The utility model discloses a kind of temperature and humidity detection circuit, circuit board and device.Warm and humid detection circuit includes control circuit, data acquisition circuit, power supply circuit, state indicating circuit and self-checking alarm circuit.Power supply circuit provides operating power supply to each circuit.Data acquisition circuit is connected with external temperature sensor, temperature and humidity sensor, sensor signal is handled and transmitted to control circuit.Control circuit carries out analysis and processing to temperature and humidity data and exports control instruction.State indicating circuit is used to indicate temperature and humidity detection state.Self-checking alarm circuit is input to control circuit to start self-checking on one hand with the state of self-checking button, on the other hand, the alarm signal of control circuit can be exported.The circuit compact structure, high integration, good reliability.

Description

Technical Field

[0001] This invention belongs to the field of equipment status monitoring and intelligent control technology, specifically relating to a temperature and humidity detection circuit, circuit board and device. Background Technology

[0002] The slip ring is a core transmission component in a wind turbine generator, connecting the generator rotor windings to the external converter system, and plays a crucial role in the reliable transmission of electrical energy. During operation, the slip ring generates heat due to the current flowing through it, and its operating environment is easily affected by external climate. When the ambient humidity is too high, condensation can easily form on the surface and inside of the slip ring, leading to electrical short circuits, arcing, and corrosion of metal parts; when the ambient temperature is too low, it may cause changes in material properties, lubrication failure, or even structural cracking.

[0003] Existing collector ring temperature and humidity control devices lack condensation early warning and system self-test functions, making it impossible to achieve preventive regulation and failing to meet the high reliability requirements of unattended and intelligent operation and maintenance of wind farms.

[0004] Therefore, there is an urgent need in this field for an intelligent solution that can monitor the working environment of the collector ring in real time and accurately, while also having status indication and fault early warning functions. Utility Model Content

[0005] The main objective of this invention is to provide a temperature and humidity detection circuit, comprising: The system includes a control circuit, a data acquisition circuit, a power supply circuit, a status indicator circuit, and a self-test alarm circuit. The power supply circuit is connected to the control circuit, the data acquisition circuit, the status indicator circuit, and the self-test alarm circuit. The control circuit is connected to the data acquisition circuit, the status indicator circuit, and the self-test alarm circuit. The data acquisition circuit connects to an external temperature sensor and a temperature and humidity sensor, processes the monitoring results from the temperature sensor and the temperature and humidity sensor, and transmits them to the control circuit. The power supply circuit processes the input voltage and supplies power to the control circuit, the data acquisition circuit, the status indicator circuit, and the self-test alarm circuit. The status indicator circuit indicates the temperature and humidity detection status. The self-test alarm circuit inputs the self-test button status to the control circuit and outputs an alarm signal from the control circuit.

[0006] Optionally, in one embodiment of the present invention, the control circuit includes a microcontroller U16, the sixth and twelfth pins of the microcontroller U16 are grounded, the seventh, eighth, and tenth pins of the microcontroller U16 are connected to the power supply circuit, and the first, second, third, fourth, fifth, twenty-ninth, thirtieth, thirty-first, and thirty-second pins of the microcontroller are connected to the data acquisition circuit.

[0007] Optionally, in one embodiment of the present invention, the data acquisition circuit includes a temperature acquisition circuit and a temperature and humidity acquisition circuit, wherein the first, second, third, fourth, fifth, thirty-first, and thirty-second pins of the microcontroller are respectively connected to the temperature acquisition circuit, and the twenty-ninth and thirtieth pins of the microcontroller are connected to the temperature and humidity acquisition circuit.

[0008] Optionally, in one embodiment of this utility model, the temperature sampling circuit includes a single operational amplifier chip U6, a voltage regulator chip U5, an adjustable resistor R1, and a bidirectional TVS diode D1. PT100 interface CN3 Resistor R2, R3 R4 R5 R6, R7, R8, R9, R10, capacitor C1; The first pin of PT100 interface CN3 is connected to one end of resistor R3 and one end of resistor R5. The second pin of PT100 interface CN3 is connected to one end of resistor R10. The third pin of PT100 interface CN3 is grounded. The other end of resistor R3 is connected to the other end of resistor R4, the upper end of resistor R1, one end of resistor R2, and the first pin of U5. The other end of resistor R2 is connected to the power supply circuit. The second pin of U5 is connected to the middle of resistor R1. The third pin of U5 is grounded to the lower end of resistor R1. The other end of resistor R4 is connected to one end of resistor R6. One end of resistor R10 is connected; the other end of resistor R5 is connected to one end of resistor R7 and the first pin of U6; the other end of resistor R6 is connected to one end of resistor R8 and the third pin of U6; the other end of resistor R7 is grounded to the second pin of U6; the other end of resistor R8 is connected to the fourth pin of U6 and one end of resistor R9; the fifth pin of U6 is connected to the power supply circuit; the other end of resistor R9 is connected to one end of bidirectional TVS diode D1 and one end of capacitor C1 to the microcontroller U16; the other end of bidirectional TVS diode D1 and the other end of capacitor C1 are grounded.

[0009] Optionally, in one embodiment of the present invention, the temperature and humidity sampling circuit includes a temperature and humidity interface CN10, resistors R79, R80, R81, R82, R83, R84, R85, R86, R87, R88, R89, and R90, capacitors C7 and C15, and diodes D7, D8, D21, and D22. The first pin of interface CN10 is connected to the power supply circuit, the second pin of CN10 is grounded, and the third pin of CN10 is connected to one end of resistors R79, R80, R81, R82, and R83. The other end of resistors R79, R80, R81, and R82 is grounded. The other end of resistor R83 is connected to the anode of diode D21, one end of capacitor C7, one end of resistor R84, and the cathode of diode D22. The cathode of diode D21 is connected to the power supply circuit, the anode of diode D22 is grounded, the other end of capacitor C7 is grounded, and the other end of resistor R84 is connected to... Pin 29 of microcontroller U16, pin 4 of interface CN10, is connected to one end of resistors R85, R86, R87, R88, and R89. The other end of resistors R85, R86, R87, and R88 is grounded. The other end of resistor R89 ​​is connected to the positive terminal of diode D7, one end of capacitor C15, one end of resistor R90, and the negative terminal of diode D8. The negative terminal of diode D7 is connected to the power supply circuit, the positive terminal of diode D8 is grounded, the other end of capacitor C15 is grounded, and the other end of resistor R90 is connected to pin 30 of microcontroller U16.

[0010] Optionally, in one embodiment of this utility model, the eleventh and twenty-fifth pins of the microcontroller U16 are connected to the self-test alarm circuit.

[0011] Optionally, in one embodiment of the present invention, the self-test alarm circuit includes: relay K3, resistors R15 and R16, transistor Q1, diode D19, and inspection alarm interface CN19. Pin 25 of microcontroller U16 is connected to one end of resistor R15. The other end of resistor R15 is connected to one end of resistor R16 and the base of transistor Q1. The other end of resistor R16 is grounded to the emitter of transistor Q1. The collector of transistor Q1 is connected to the anode of diode D19 and one end of the coil of relay K3. The cathode of diode D19 and the other end of the coil of relay K3 are connected to the power supply circuit. The output of relay K3 is connected to the third and fourth pins of the inspection alarm interface CN19. The first pin of the inspection alarm interface CN19 is grounded. The second pin of the inspection alarm interface CN19 is connected to pin 11 of microcontroller U16.

[0012] Optionally, in one embodiment of the present invention, pins 15, 16, 17, 18, 21, 22, 23, and 24 of the microcontroller U16 are connected to the status indicator circuit.

[0013] Optionally, in one embodiment of the present invention, the status indication circuit includes transistor optocoupler chips U17 and U18, resistors R99, R101, R102, R103, R104, R105, R106, R107, R19, R20, R21, R22, R95, R96, R97, and R98, capacitors C19, C20, and C23, and light-emitting diodes LED1, LED2, LED3, LED4, LED5, LED6, LED7, and LED8; Pin 15 of microcontroller U16 is connected to one end of resistor R107, and the other end of resistor R107 is connected to pin 7 of transistor optocoupler chip U18. Pin 16 of microcontroller U16 is connected to one end of resistor R106, and the other end of resistor R106 is connected to pin 5 of transistor optocoupler chip U18. Pin 17 of microcontroller U16 is connected to one end of resistor R105, and the other end of R105 is connected to pin 3 of transistor optocoupler chip U18. Pin 18 of microcontroller U16 is connected to one end of resistor R104, and the other end of resistor R104 is connected to pin 1 of transistor optocoupler chip U18. The 21st pin of controller U16 is connected to one end of resistor R103, and the other end of resistor R103 is connected to the 7th pin of transistor optocoupler chip U17. The 22nd pin of microcontroller U16 is connected to one end of resistor R102, and the other end of resistor R102 is connected to the 5th pin of transistor optocoupler chip U17. The 23rd pin of microcontroller U16 is connected to one end of resistor R101, and the other end of resistor R101 is connected to the 3rd pin of transistor optocoupler chip U17. The 24th pin of microcontroller U16 is connected to one end of resistor R99, and the other end of resistor R99 is connected to the 1st pin of transistor optocoupler chip U17. The second, fourth, sixth, and eighth pins of transistor optocoupler chip U17 are grounded; the second, fourth, sixth, and eighth pins of transistor optocoupler chip U18 are grounded; the tenth, twelfth, fourteenth, and sixteenth pins of transistor optocoupler chip U17 and transistor optocoupler chip U18 are connected to the power supply circuit; the ninth pin of transistor optocoupler chip U17 is connected to one end of LED4; the other end of LED4 is connected to one end of resistor R22. The other end of pin 22 is grounded. Pin 11 of transistor optocoupler chip U17 is connected to one end of LED3. The other end of LED3 is connected to one end of resistor R21. The other end of resistor R21 is grounded. Pin 13 of transistor optocoupler chip U17 is connected to one end of LED2. The other end of LED2 is connected to one end of resistor R20. The other end of resistor R20 is grounded. Pin 15 of transistor optocoupler chip U17 is connected to one end of LED1. The other end of LED1 is connected to one end of resistor R19. The other end of resistor R19 is grounded. The ninth pin of the transistor optocoupler chip U18 is connected to one end of LED8, and the other end of LED8 is connected to one end of resistor R98, which is grounded. The eleventh pin of the transistor optocoupler chip U18 is connected to one end of LED7, and the other end of LED7 is connected to one end of resistor R97, which is grounded. The thirteenth pin of the transistor optocoupler chip U18 is connected to one end of LED6, and the other end of LED6 is connected to one end of resistor R96, which is grounded. The fifteenth pin of the transistor optocoupler chip U18 is connected to one end of LED5, and the other end of LED5 is connected to one end of resistor R95, which is grounded. After capacitors C23, C19, and C20 are connected in parallel, one end is connected to the power supply circuit, and the other end is grounded.

[0014] Optionally, in one embodiment of the present invention, the temperature and humidity detection circuit further includes a cooling fan interface circuit, a heating fan interface circuit, and a heater interface circuit. The cooling fan interface circuit, the heating fan interface circuit, and the heater interface circuit are respectively connected to the power supply circuit. The twenty-sixth pin of the microcontroller U16 is connected to the cooling fan interface circuit, the twenty-seventh pin of the microcontroller U16 is connected to the heating fan interface circuit, and the twenty-eighth pin of the microcontroller U16 is connected to the heater interface circuit.

[0015] This utility model also proposes a temperature and humidity detection circuit board, including a motherboard, on which the above-mentioned temperature and humidity detection circuit is provided.

[0016] This utility model also proposes a temperature and humidity detection device, including a housing, inside which the aforementioned main board is provided, and the housing is provided with a temperature sensor interface, a temperature and humidity sensor interface, a power cord and a self-test button 40. The temperature sensor interface and the temperature and humidity sensor interface are connected to the data acquisition circuit, the power cord is connected to the power supply circuit, and the self-test button is connected to the self-test alarm circuit.

[0017] This invention provides power to each circuit through a power supply circuit. The data acquisition circuit connects to external temperature and humidity sensors, processes the sensor signals, and transmits them to the control circuit. The control circuit analyzes and processes the temperature and humidity data and outputs control commands. The status indicator circuit indicates the temperature and humidity detection status. The self-test alarm circuit inputs the self-test button status to the control circuit to initiate the self-test and also outputs an alarm signal from the control circuit. This circuit features a compact structure, high integration, and good reliability. It provides an intelligent solution capable of real-time and accurate monitoring of the slip ring's operating environment, while also offering status indication and fault warning functions. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of an embodiment of the temperature and humidity detection circuit of this utility model; Figure 2 This is a schematic diagram of an embodiment of the control circuit of this utility model; Figure 3 This is a schematic diagram of an embodiment of the temperature sampling circuit of this utility model; Figure 4 This is a schematic diagram of an embodiment of the temperature and humidity sampling circuit of this utility model; Figure 5 This is a schematic diagram of an embodiment of the self-test alarm circuit of this utility model; Figure 6 This is a schematic diagram of an embodiment of the status indication circuit of this utility model; Figure 7 This is a schematic diagram of another embodiment of the temperature and humidity detection circuit of this utility model; Figure 8 This is a perspective view of an embodiment of the temperature and humidity detection device of this utility model; Figure 9This is a front view of an embodiment of the temperature and humidity detection device of this utility model; Figure 10 This is a rear view of an embodiment of the temperature and humidity detection device of this utility model.

[0020] Explanation of icon numbers: 100. Temperature and humidity detection device; 10. Housing; 21. Temperature sensor interface; 22. Temperature and humidity sensor interface; 30. Power cord; 40. Self-test button; 50. Cooling fan interface; 60. Heating fan interface; 70. Heater interface; 80. LED light.

[0021] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] The slip ring is a core transmission component in a wind turbine generator, connecting the generator rotor windings to the external converter system, and plays a crucial role in the reliable transmission of electrical energy. During operation, the slip ring generates heat due to the current flowing through it, and its operating environment is easily affected by external climate. When the ambient humidity is too high, condensation can easily form on the surface and inside of the slip ring, leading to electrical short circuits, arcing, and corrosion of metal parts; when the ambient temperature is too low, it may cause changes in material properties, lubrication failure, or even structural cracking.

[0024] Existing collector ring temperature and humidity control devices lack condensation early warning and system self-test functions, making it impossible to achieve preventive regulation and failing to meet the high reliability requirements of unattended and intelligent operation and maintenance of wind farms.

[0025] Therefore, there is an urgent need in this field for an intelligent solution that can monitor the working environment of the collector ring in real time and accurately, while also having status indication and fault early warning functions.

[0026] In view of this, this utility model proposes a temperature and humidity detection circuit, circuit board, and device, which provides operating power to each circuit through a power supply circuit. The data acquisition circuit is connected to external temperature and humidity sensors, processes the sensor signals, and transmits them to the control circuit. The control circuit analyzes and processes the temperature and humidity data and outputs control commands. The status indication circuit indicates the temperature and humidity detection status. The self-test alarm circuit, on the one hand, inputs the self-test button status to the control circuit to initiate the self-test, and on the other hand, outputs an alarm signal from the control circuit. This circuit has a compact structure, high integration, and good reliability, enabling real-time and accurate monitoring of the collector ring's operating environment, while also providing an intelligent solution with status indication and fault warning functions.

[0027] To better understand the above technical solution, a detailed explanation of the technical solution is provided below with reference to the accompanying drawings.

[0028] like Figure 1 As shown, this utility model proposes a temperature and humidity detection circuit, including a control circuit, a data acquisition circuit, a power supply circuit, a status indication circuit, and a self-test alarm circuit. The power supply circuit is connected to the control circuit, the data acquisition circuit, the status indication circuit, and the self-test alarm circuit. The control circuit is connected to the data acquisition circuit, the status indication circuit, and the self-test alarm circuit. The data acquisition circuit is used to connect to an external temperature sensor and a temperature and humidity sensor, and to process the monitoring results of the temperature sensor and the temperature and humidity sensor before transmitting them to the control circuit. The power supply circuit is used to process the input voltage and supply power to the control circuit, the data acquisition circuit, the status indication circuit, and the self-test alarm circuit. The status indication circuit is used to indicate the temperature and humidity detection status. The self-test alarm circuit is used to input the self-test button status to the control circuit and to output the alarm signal from the control circuit.

[0029] Understandably, the power supply circuit, as the energy source for the entire system, connects to an external AC 220V power supply at its input terminal. It performs conversion, regulation, and filtering of the input voltage to form the stable low-voltage DC voltage (e.g., +5V, +24V) required by the system. Since this power supply circuit is a mature existing solution, its specific implementation is not limited here. The output terminal of the power supply circuit connects to the control circuit, data acquisition circuit, status indication circuit, and self-test alarm circuit, providing them with a stable and reliable power supply. The control circuit establishes communication with the data acquisition circuit, status indication circuit, and self-test alarm circuit. Its functions include: receiving and processing signals from the data acquisition circuit, executing the built-in control algorithm, issuing control commands to the status indication circuit and self-test alarm circuit based on preset temperature and humidity thresholds or interface connection status, and responding to self-test signals. The data acquisition circuit connects to external temperature and humidity sensors, processes the monitoring results from these sensors, and transmits them to the control circuit. The status indicator circuit is connected to the control circuit and is used to receive status commands issued by the control circuit. It provides intuitive reminders of the current system status through means including but not limited to sound and light, indicating, but not limited to, power status, sensor operating status, external device connection status, and alarm status. The self-test alarm circuit is connected to the control circuit and has a dual function: first, it inputs the status signal from the external self-test button to the control circuit, triggering the system self-test program to verify whether each functional module is functioning correctly; second, it outputs the alarm signal from the control circuit, driving an external audible and visual alarm to provide remote alarms in cases of excessive temperature and humidity or abnormal connections.

[0030] Furthermore, in one embodiment of this utility model, the control circuit includes a microcontroller U16, the sixth and twelfth pins of the microcontroller U16 are grounded, the seventh, eighth, and tenth pins of the microcontroller U16 are connected to the power supply circuit, and the first, second, third, fourth, fifth, twenty-ninth, thirtieth, thirty-first, and thirty-second pins of the microcontroller are connected to the data acquisition circuit.

[0031] Understandable, such as Figure 2 As shown, the control circuit, as the intelligent core of the system, is composed of an industrial-grade microcontroller (MCU) U16 and its peripheral circuits. An optional model of the microcontroller U16 is such as the STC8H3K48S2. Pins 7, 8, and 10 of the microcontroller U16 are connected to the +5V output terminal of the power supply circuit to provide a 5V operating voltage for the microcontroller U16.

[0032] Furthermore, in one embodiment of this utility model, the data acquisition circuit includes a temperature acquisition circuit and a temperature and humidity acquisition circuit. The first, second, third, fourth, fifth, thirty-first, and thirty-second pins of the microcontroller are respectively connected to the temperature acquisition circuit, and the twenty-ninth and thirtieth pins of the microcontroller are connected to the temperature and humidity acquisition circuit.

[0033] Understandably, the data acquisition circuit includes seven identical temperature acquisition circuits and one temperature and humidity acquisition circuit. Each temperature acquisition circuit is used to connect to an external temperature sensor, and the temperature and humidity acquisition circuit is used to connect to an external temperature and humidity sensor.

[0034] Further, in one embodiment of this utility model, the temperature sampling circuit includes a single operational amplifier chip U6, a voltage regulator chip U5, an adjustable resistor R1, a bidirectional TVS diode D1, a PT100 interface CN3, resistors R2, R3, R4, R5, R6, R7, R8, R9, and R10, and a capacitor C1; the first pin of the PT100 interface CN3 is connected to one end of resistor R3 and one end of resistor R5, the second pin of the PT100 interface CN3 is connected to one end of resistor R10, the third pin of the PT100 interface CN3 is grounded, the other end of resistor R3 is connected to the other end of resistor R4, the upper end of resistor R1, one end of resistor R2, and the first pin of the voltage regulator chip U5, and the other end of resistor R2 is connected to the power supply circuit. The second pin of U5 is connected to the middle of resistor R1, the third pin of U5 is grounded to the lower end of resistor R1, the other end of resistor R4 is connected to one end of resistor R6 and one end of resistor R10, the other end of resistor R5 is connected to one end of resistor R7 and the first pin of U6, the other end of resistor R6 is connected to one end of resistor R8 and the third pin of U6; the other end of resistor R7 is grounded to the second pin of U6; the other end of resistor R8 is connected to the fourth pin of U6 and one end of resistor R9, the fifth pin of U6 is connected to the power supply circuit, the other end of resistor R9 is connected to one end of bidirectional TVS diode D1 and one end of capacitor C1 to the microcontroller U16; the other end of bidirectional TVS diode D1 and the other end of capacitor C1 are grounded.

[0035] Understandable, such as Figure 3 As shown, taking a single temperature acquisition circuit as an example, the temperature acquisition circuit is connected to the +5V output terminal of the power supply circuit. The core of the temperature acquisition circuit is a single operational amplifier chip U6 (such as LM358) and a voltage regulator chip U5 (such as TL431). The PT100 interface CN3 is connected to the PT100 temperature sensor. Through the precision constant voltage source composed of the voltage regulator chip U5 and the amplification circuit composed of the single operational amplifier chip U6, the resistance change of the PT100 is linearly converted into a voltage signal and output to the corresponding pin of the microcontroller U16.

[0036] Further, in one embodiment of this utility model, the temperature and humidity sampling circuit includes a temperature and humidity interface CN10, resistors R79, R80, R81, R82, R83, R84, R85, R86, R87, R88, R89, and R90, capacitors C7 and C15, and diodes D7, D8, D21, and D22. The first pin of interface CN10 is connected to the power supply circuit, the second pin of CN10 is grounded, and the third pin of CN10 is connected to one end of R79, R80, R81, R82, and R83. The other ends of resistors R79, R80, R81, and R82 are grounded, and the other end of resistor R83 is connected to the positive terminal of diode D21, one end of capacitor C7, one end of resistor R84, and diode D22. The negative terminal of diode D22 is connected to the power supply circuit, the positive terminal of diode D22 is grounded, the other end of capacitor C7 is grounded, the other end of resistor R84 is connected to the 29th pin of microcontroller U16, the fourth pin of interface CN10 is connected to one end of resistors R85, R86, R87, R88, and R89, the other ends of resistors R85, R86, R87, and R88 are grounded, the other end of resistor R89 ​​is connected to the positive terminal of diode D7, one end of capacitor C15, one end of resistor R90, and the negative terminal of diode D8, the negative terminal of diode D7 is connected to the power supply circuit, the positive terminal of diode D8 is grounded, the other end of capacitor C15 is grounded, and the other end of resistor R90 is connected to the 30th pin of microcontroller U16.

[0037] Understandable, such as Figure 4 As shown, the temperature and humidity sampling circuit is connected to the +5V output terminal of the power supply circuit. The temperature and humidity sensor is connected to the temperature and humidity sampling circuit via interface CN10. The temperature and humidity sampling circuit is connected to the 5V output terminal of the power supply circuit. The signal returned by the temperature and humidity sensor passes through a filtering, limiting, and protection circuit composed of resistors R79-R90, capacitors C7 and C15, and diodes D7, D8, D21, and D22, and then outputs two voltage signals to the corresponding pins of the microcontroller U16.

[0038] Furthermore, in one embodiment of this utility model, the eleventh and twenty-fifth pins of the microcontroller U16 are connected to the self-test alarm circuit.

[0039] Preferably, the self-test alarm circuit includes: a relay K3, resistors R15 and R16, a transistor Q1, a diode D19, and a patrol alarm interface CN19; the 25th pin of the microcontroller U16 is connected to one end of resistor R15, the other end of resistor R15 is connected to one end of resistor R16 and the base of transistor Q1, the other end of resistor R16 is grounded to the emitter of transistor Q1, the collector of transistor Q1 is connected to the anode of diode D19 and one end of the coil of relay K3, the cathode of diode D19 and the other end of the coil of relay K3 are connected to the power supply circuit, the output of relay K3 is connected to the third and fourth pins of patrol alarm interface CN19, the first pin of patrol alarm interface CN19 is grounded, and the second pin of patrol alarm interface CN19 is connected to the 11th pin of microcontroller U16.

[0040] Understandable, such as Figure 5 As shown, the self-test alarm circuit is connected to the +24V output terminal of the power supply circuit. The self-test button is connected to the first and second pins of the inspection alarm interface CN19, and the external alarm device is connected to the third and fourth pins of the inspection alarm interface CN19. The self-test alarm circuit can input the status signal of the external self-test button to the control circuit, triggering the system self-test program to verify whether each functional module is normal; the self-test alarm circuit can also output the alarm signal issued by the control circuit, driving external audible and visual alarms and other external alarm devices through relays, providing remote alarms when temperature and humidity exceed limits or equipment malfunctions.

[0041] Furthermore, in one embodiment of this utility model, pins 15, 16, 17, 18, 21, 22, 23, and 24 of the microcontroller U16 are connected to the status indicator circuit.

[0042] Preferably, the status indication circuit includes transistor optocoupler chips U17 and U18, resistors R99, R101, R102, R103, R104, R105, R106, R107, R19, R20, R21, R22, R95, R96, R97, and R98, capacitors C19, C20, and C23, and light-emitting diodes LED1, LED2, LED3, LED4, LED5, LED6, LED7, and LED8; the fifteenth pin of the microcontroller U16 is connected to one end of resistor R107, the other end of resistor R107 is connected to the seventh pin of the transistor optocoupler chip U18, the sixteenth pin of the microcontroller U16 is connected to one end of resistor R106, and resistor R10... The other end of pin 6 is connected to pin 5 of transistor optocoupler chip U18. Pin 17 of microcontroller U16 is connected to one end of resistor R105, and the other end of R105 is connected to pin 3 of transistor optocoupler chip U18. Pin 18 of microcontroller U16 is connected to one end of resistor R104, and the other end of resistor R104 is connected to pin 1 of transistor optocoupler chip U18. Pin 21 of microcontroller U16 is connected to one end of resistor R103, and the other end of resistor R103 is connected to pin 7 of transistor optocoupler chip U17. Pin 22 of microcontroller U16 is connected to one end of resistor R102, and the other end of resistor R102 is connected to pin 5 of transistor optocoupler chip U17. Pin 23 of microcontroller U16 is connected to... One end of resistor R101 is connected to the third pin of transistor optocoupler chip U17. The twenty-fourth pin of microcontroller U16 is connected to one end of resistor R99, and the other end of resistor R99 is connected to the first pin of transistor optocoupler chip U17. The second, fourth, sixth, and eighth pins of transistor optocoupler chip U17 are grounded, and the second, fourth, sixth, and eighth pins of transistor optocoupler chip U18 are grounded. The tenth, twelfth, fourteenth, and sixteenth pins of transistor optocoupler chip U17 and transistor optocoupler chip U18 are connected to the power supply circuit. The tenth, twelfth, fourteenth, and sixteenth pins of transistor optocoupler chip U17 are connected to the power supply circuit. Pin 9 is connected to one end of LED4, and the other end of LED4 is connected to one end of resistor R22, which is grounded. Pin 11 of transistor optocoupler chip U17 is connected to one end of LED3, and the other end of LED3 is connected to one end of resistor R21, which is grounded. Pin 13 of transistor optocoupler chip U17 is connected to one end of LED2, and the other end of LED2 is connected to one end of resistor R20, which is grounded. Pin 15 of transistor optocoupler chip U17 is connected to one end of LED1, and the other end of LED1 is connected to one end of resistor R19, which is grounded.Pin 9 of transistor optocoupler chip U18 is connected to one end of LED8, and the other end of LED8 is connected to one end of resistor R98, the other end of which is grounded. Pin 11 of transistor optocoupler chip U18 is connected to one end of LED7, and the other end of LED7 is connected to one end of resistor R97, the other end of which is grounded. Pin 13 of transistor optocoupler chip U18 is connected to one end of LED6, and the other end of LED6 is connected to one end of resistor R96, the other end of which is grounded. Pin 15 of transistor optocoupler chip U18 is connected to one end of LED5, and the other end of LED5 is connected to one end of resistor R95, the other end of which is grounded. Capacitors C23, C19, and C20 are connected in parallel, with one end connected to the power supply circuit and the other end grounded.

[0043] Understandable, such as Figure 6 As shown, the status indicator circuit is connected to the 5V output terminal of the power supply circuit. The status indicator circuit is also connected to the control circuit to receive status commands issued by the control circuit and to visually indicate the current system status through multiple light-emitting diodes (LEDs), including but not limited to power status, sensor operating status, equipment start / stop status, alarm status, etc.

[0044] Furthermore, in one embodiment of this utility model, the temperature and humidity detection circuit further includes a cooling fan interface circuit, a heating fan interface circuit, and a heater interface circuit. The cooling fan interface circuit, heating fan interface circuit, and heater interface circuit are respectively connected to the power supply circuit. The 26th pin of the microcontroller U16 is connected to the cooling fan interface circuit, the 27th pin of the microcontroller U16 is connected to the heating fan interface circuit, and the 28th pin of the microcontroller U16 is connected to the heater interface circuit. The cooling fan interface circuit is connected to the cooling fan interface 50, and an external cooling fan is connected to the cooling fan interface circuit through the cooling fan interface 50. The heating fan circuit is connected to the heating fan interface 60, and an external heating fan is connected to the heating fan interface circuit through the heating fan interface 60. The heater interface circuit is connected to the heater interface 70, and an external heater is connected to the heater interface circuit through the heater interface 70.

[0045] Understandable, such as Figure 7 As shown, the temperature and humidity detection circuit also includes actuator drive interface circuits, such as a cooling fan interface circuit, a heating fan interface circuit, and a heater interface circuit, which are controlled by different pins of the microcontroller to directly drive the external cooling fan, heating fan, and heater, forming a complete closed-loop control system. The cooling fan interface circuit, heating fan interface circuit, and heater interface circuit are all mature existing technologies, and their specific implementation is not limited.

[0046] Preferably, the temperature and humidity detection circuit further includes a communication circuit (not shown), which is connected to the power supply circuit and the control circuit. The communication circuit has a communication interface, through which external communication devices can connect. The control circuit can transmit information, including but not limited to temperature, humidity, and status, to the external communication device for reading. The communication circuit is a mature existing technology, and its specific implementation is not limited.

[0047] After the system is powered on, the microcontroller U16 initializes, and each sensor begins to continuously collect data. The user can press the self-test button, and the microcontroller U16 will perform a self-test. The self-test includes at least one of the following: starting the cooling fan interface circuit, starting the heating fan interface circuit, starting the heater interface circuit, and checking whether the functions and connections of components (such as various sensor signals, indicator lights, relays, chips, external devices, etc.) are normal.

[0048] The U16 microcontroller has preset multiple control thresholds: Low temperature control: When the ambient temperature is ≤5℃ (heating start threshold), the microcontroller U16 controls the output of the heater interface and the heating fan interface to start the heater and the hot fan to blow out hot air; when the temperature rises to ≥10℃ (heating stop threshold), heating and blowing stop.

[0049] High temperature control: When the ambient temperature is ≥45℃ (cooling start threshold), the microcontroller U16 controls the output of the cooling fan interface to start the cooling fan to blow out cool air; when the temperature drops to ≤40℃ (cooling stop threshold), the fan stops blowing.

[0050] Dehumidification control: When the ambient humidity is ≥70% (drying start threshold), the microcontroller U16 will also start the heater and hot fan to reduce the relative humidity by increasing the temperature; when the humidity is ≤40% (drying stop threshold), it will stop working.

[0051] Over-temperature alarm: When the temperature at any monitoring point is ≥90℃ (alarm threshold), it indicates that the active control has failed. The microcontroller U16 immediately triggers the relay in the self-test alarm circuit and the LED in the status indicator circuit, driving the external alarm to issue an alarm and reminding maintenance personnel to intervene urgently.

[0052] This utility model also proposes a temperature and humidity detection circuit board, including a motherboard, on which the above-mentioned temperature and humidity detection circuit is provided.

[0053] like Figure 8-10As shown, this utility model also proposes a temperature and humidity detection device 100, including a housing 10. The housing 10 contains the aforementioned mainboard. The housing 10 is equipped with a temperature sensor interface 21, a temperature and humidity sensor interface 22, a power cord 30, and a self-test button. The temperature sensor interface 21 and temperature and humidity sensor interface 22 are connected to the data acquisition circuit, the power cord 30 is connected to the power supply circuit, and the self-test button is connected to the self-test alarm circuit. Preferably, the housing 10 also includes an LED light 80.

[0054] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A temperature and humidity detecting circuit, characterized by comprising: include: The system includes a control circuit, a data acquisition circuit, a power supply circuit, a status indicator circuit, and a self-test alarm circuit. The power supply circuit is connected to the control circuit, the data acquisition circuit, the status indicator circuit, and the self-test alarm circuit. The control circuit is connected to the data acquisition circuit, the status indicator circuit, and the self-test alarm circuit. The data acquisition circuit connects to an external temperature sensor and a temperature and humidity sensor, processes the monitoring results from the temperature sensor and the temperature and humidity sensor, and transmits them to the control circuit. The power supply circuit processes the input voltage and supplies power to the control circuit, the data acquisition circuit, the status indicator circuit, and the self-test alarm circuit. The status indicator circuit indicates the temperature and humidity detection status. The self-test alarm circuit inputs the self-test button status to the control circuit and outputs an alarm signal from the control circuit.

2. The temperature and humidity detecting circuit according to claim 1, wherein The control circuit includes a microcontroller U16, with its sixth and twelfth pins grounded, its seventh, eighth, and tenth pins connected to the power supply circuit, and its first, second, third, fourth, fifth, twenty-ninth, thirtieth, thirty-first, and thirty-second pins connected to the data acquisition circuit.

3. The temperature and humidity detection circuit as described in claim 2, characterized in that, The data acquisition circuit includes a temperature acquisition circuit and a temperature and humidity acquisition circuit. The first, second, third, fourth, fifth, thirty-first, and thirty-second pins of the microcontroller are respectively connected to the temperature acquisition circuit, and the twenty-ninth and thirtieth pins of the microcontroller are connected to the temperature and humidity acquisition circuit.

4. The temperature and humidity detection circuit as described in claim 3, characterized in that, The temperature sampling circuit includes a single operational amplifier chip U6, a voltage regulator chip U5, an adjustable resistor R1, a bidirectional TVS transistor D1, a PT100 interface CN3, resistors R2, R3, R4, R5, R6, R7, R8, R9, R10, and a capacitor C1. The first pin of PT100 interface CN3 is connected to one end of resistor R3 and one end of resistor R5. The second pin of PT100 interface CN3 is connected to one end of resistor R10. The third pin of PT100 interface CN3 is grounded. The other end of resistor R3 is connected to the other end of resistor R4, the upper end of resistor R1, one end of resistor R2, and the first pin of U5. The other end of resistor R2 is connected to the power supply circuit. The second pin of U5 is connected to the middle of resistor R1. The third pin of U5 is grounded to the lower end of resistor R1. The other end of resistor R4 is connected to one end of resistor R6. One end of resistor R10 is connected; the other end of resistor R5 is connected to one end of resistor R7 and the first pin of U6; the other end of resistor R6 is connected to one end of resistor R8 and the third pin of U6; the other end of resistor R7 is grounded to the second pin of U6; the other end of resistor R8 is connected to the fourth pin of U6 and one end of resistor R9; the fifth pin of U6 is connected to the power supply circuit; the other end of resistor R9 is connected to one end of bidirectional TVS diode D1 and one end of capacitor C1 to the microcontroller U16; the other end of bidirectional TVS diode D1 and the other end of capacitor C1 are grounded.

5. The temperature and humidity detection circuit as described in claim 4, characterized in that, The temperature and humidity sampling circuit includes a temperature and humidity interface CN10, resistors R79, R80, R81, R82, R83, R84, R85, R86, R87, R88, R89, and R90, capacitors C7 and C15, and diodes D7, D8, D21, and D22. The first pin of interface CN10 is connected to the power supply circuit, the second pin of CN10 is grounded, and the third pin of CN10 is connected to one end of resistors R79, R80, R81, R82, and R83. The other end of resistors R79, R80, R81, and R82 is grounded. The other end of resistor R83 is connected to the anode of diode D21, one end of capacitor C7, one end of resistor R84, and the cathode of diode D22. The cathode of diode D21 is connected to the power supply circuit, the anode of diode D22 is grounded, the other end of capacitor C7 is grounded, and the other end of resistor R84 is connected to... Pin 29 of microcontroller U16, pin 4 of interface CN10, is connected to one end of resistors R85, R86, R87, R88, and R89. The other end of resistors R85, R86, R87, and R88 is grounded. The other end of resistor R89 ​​is connected to the positive terminal of diode D7, one end of capacitor C15, one end of resistor R90, and the negative terminal of diode D8. The negative terminal of diode D7 is connected to the power supply circuit, the positive terminal of diode D8 is grounded, the other end of capacitor C15 is grounded, and the other end of resistor R90 is connected to pin 30 of microcontroller U16.

6. The temperature and humidity detection circuit as described in claim 2, characterized in that, Pins 11 and 25 of the microcontroller U16 are connected to the self-test alarm circuit.

7. The temperature and humidity detection circuit as described in claim 6, characterized in that, The self-test alarm circuit includes: relay K3, resistors R15 and R16, transistor Q1, diode D19, and inspection alarm interface CN19. Pin 25 of microcontroller U16 is connected to one end of resistor R15. The other end of resistor R15 is connected to one end of resistor R16 and the base of transistor Q1. The other end of resistor R16 is grounded to the emitter of transistor Q1. The collector of transistor Q1 is connected to the anode of diode D19 and one end of the coil of relay K3. The cathode of diode D19 and the other end of the coil of relay K3 are connected to the power supply circuit. The output of relay K3 is connected to the third and fourth pins of the inspection alarm interface CN19. The first pin of the inspection alarm interface CN19 is grounded. The second pin of the inspection alarm interface CN19 is connected to pin 11 of microcontroller U16.

8. The temperature and humidity detection circuit as described in claim 2, characterized in that, Pins 15, 16, 17, 18, 21, 22, 23, and 24 of the microcontroller U16 are connected to the status indicator circuit.

9. The temperature and humidity detection circuit as described in claim 8, characterized in that, The status indication circuit includes transistor optocoupler chips U17 and U18, resistors R99, R101, R102, R103, R104, R105, R106, R107, R19, R20, R21, R22, R95, R96, R97, and R98, capacitors C19, C20, and C23, and light-emitting diodes LED1, LED2, LED3, LED4, LED5, LED6, LED7, and LED8. Pin 15 of microcontroller U16 is connected to one end of resistor R107, and the other end of resistor R107 is connected to pin 7 of transistor optocoupler chip U18. Pin 16 of microcontroller U16 is connected to one end of resistor R106, and the other end of resistor R106 is connected to pin 5 of transistor optocoupler chip U18. Pin 17 of microcontroller U16 is connected to one end of resistor R105, and the other end of R105 is connected to pin 3 of transistor optocoupler chip U18. Pin 18 of microcontroller U16 is connected to one end of resistor R104, and the other end of resistor R104 is connected to pin 1 of transistor optocoupler chip U18. The 21st pin of controller U16 is connected to one end of resistor R103, and the other end of resistor R103 is connected to the 7th pin of transistor optocoupler chip U17. The 22nd pin of microcontroller U16 is connected to one end of resistor R102, and the other end of resistor R102 is connected to the 5th pin of transistor optocoupler chip U17. The 23rd pin of microcontroller U16 is connected to one end of resistor R101, and the other end of resistor R101 is connected to the 3rd pin of transistor optocoupler chip U17. The 24th pin of microcontroller U16 is connected to one end of resistor R99, and the other end of resistor R99 is connected to the 1st pin of transistor optocoupler chip U17. The second, fourth, sixth, and eighth pins of transistor optocoupler chip U17 are grounded; the second, fourth, sixth, and eighth pins of transistor optocoupler chip U18 are grounded; the tenth, twelfth, fourteenth, and sixteenth pins of transistor optocoupler chip U17 and transistor optocoupler chip U18 are connected to the power supply circuit; the ninth pin of transistor optocoupler chip U17 is connected to one end of LED4; the other end of LED4 is connected to one end of resistor R22. The other end of pin 22 is grounded. Pin 11 of transistor optocoupler chip U17 is connected to one end of LED3. The other end of LED3 is connected to one end of resistor R21. The other end of resistor R21 is grounded. Pin 13 of transistor optocoupler chip U17 is connected to one end of LED2. The other end of LED2 is connected to one end of resistor R20. The other end of resistor R20 is grounded. Pin 15 of transistor optocoupler chip U17 is connected to one end of LED1. The other end of LED1 is connected to one end of resistor R19. The other end of resistor R19 is grounded. The ninth pin of the transistor optocoupler chip U18 is connected to one end of LED8, and the other end of LED8 is connected to one end of resistor R98, which is grounded. The eleventh pin of the transistor optocoupler chip U18 is connected to one end of LED7, and the other end of LED7 is connected to one end of resistor R97, which is grounded. The thirteenth pin of the transistor optocoupler chip U18 is connected to one end of LED6, and the other end of LED6 is connected to one end of resistor R96, which is grounded. The fifteenth pin of the transistor optocoupler chip U18 is connected to one end of LED5, and the other end of LED5 is connected to one end of resistor R95, which is grounded. After capacitors C23, C19, and C20 are connected in parallel, one end is connected to the power supply circuit, and the other end is grounded.

10. The temperature and humidity detection circuit as described in claim 2, characterized in that, The temperature and humidity detection circuit also includes a cooling fan interface circuit, a heating fan interface circuit, and a heater interface circuit. The cooling fan interface circuit, the heating fan interface circuit, and the heater interface circuit are respectively connected to the power supply circuit. The 26th pin of the microcontroller U16 is connected to the cooling fan interface circuit, the 27th pin of the microcontroller U16 is connected to the heating fan interface circuit, and the 28th pin of the microcontroller U16 is connected to the heater interface circuit.

11. A temperature and humidity detection circuit board, characterized in that, Includes a motherboard, wherein the motherboard is provided with a temperature and humidity detection circuit as described in any one of claims 1-10.

12. A temperature and humidity detection device, characterized in that, The device includes a housing, inside which is a motherboard as described in claim 11. The housing is provided with a temperature sensor interface, a temperature and humidity sensor interface, a power cord, and a self-test button. The temperature sensor interface and the temperature and humidity sensor interface are connected to the data acquisition circuit, the power cord is connected to the power supply circuit, and the self-test button is connected to the self-test alarm circuit.

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