Fire alarm controller with humidity detection function

Abstract

The utility model relates to the technical field of fire alarm, in particular to a fire alarm controller with a humidity detection function, which combines the humidity detection technology with the traditional fire alarm technology, realizes comprehensive monitoring and early warning of fire risks, improves the performance of a fire early warning system, and improves the safety of the fire alarm system. The system also provides more flexible and reliable choices for fire prevention and control in different scenes, and comprises a main control board. The main control board comprises a CPU (Central Processing Unit) main control unit, a liquid crystal screen interface unit, a humidity sensor, an upper computer interface unit, a switching power supply unit, an alarm data acquisition card unit, a data storage unit interface, a wireless communication module interface and a sound-light alarm module; the humidity sensor is used for monitoring the external humidity condition in real time, the CPU main control unit comprises an MCU chip U1 with the model of STM32H743ZI, the humidity sensor is a sensor chip X9 with the model of HTU21D, and a pin 3 and a pin 4 of the sensor chip X9 are connected with a pin 27 and a pin 28 of the MCU chip U1 respectively.

Description

Technical Field

[0001] This utility model relates to the field of fire alarm technology, specifically a fire alarm controller with humidity detection function. Background Technology

[0002] Fire is an extremely destructive disaster, threatening not only human lives but also causing significant property damage. Globally, the number of casualties and property losses caused by fire remains high annually. Fires are often characterized by smoke, high temperatures, and flames, which serve as crucial design considerations for fire alarm controllers. However, traditional fire alarm controllers primarily rely on smoke and temperature detectors, and their early warning capabilities are limited for certain environmental fire risks, such as fires caused by humidity changes. Warehouses, as important storage areas, are critically affected by humidity levels, which directly impacts the preservation and safety of goods. Excessive humidity can lead to dampness, mold, and even fires, especially in warehouses storing flammable and explosive materials, where humidity fluctuations directly affect fire risk. Therefore, accurate humidity monitoring in warehouses is a vital means of fire prevention and ensuring the safety of goods. Summary of the Invention

[0003] To address the aforementioned technical issues, this utility model provides a fire alarm controller with humidity detection functionality. It combines humidity detection technology with traditional fire alarm technology, enabling comprehensive monitoring and early warning of fire risks, improving the performance of fire early warning systems, and providing more flexible and reliable options for fire prevention and control in different scenarios.

[0004] The technical solution is as follows: a fire alarm controller with humidity detection function, comprising a main control board, characterized in that the main control board includes a CPU main control unit, an LCD screen interface unit, a humidity sensor, a host computer interface unit, a switching power supply unit, an alarm data acquisition card unit, a data storage unit interface, a wireless communication module interface, and an audible and visual alarm module; the humidity sensor is used to monitor the external humidity in real time.

[0005] A further feature is that the CPU main control unit includes an MCU chip U1 with model number STM32H743ZI, and the humidity sensor is a sensor chip X9 with model number HTU21D. Pins 3 and 4 of the sensor chip X9 are respectively connected to pins 27 and 28 of the MCU chip U1.

[0006] The switching power supply unit includes a 24V to 5V circuit, a 5V to 3.3V circuit, and a power status signal detection circuit. The 24V to 5V circuit includes an LM2576 voltage regulator module U2 and outputs VCC. The 5V to 3.3V circuit includes an SPX1117M3-3.3 voltage regulator chip U3 and outputs VDD3.3. The power status signal detection circuit includes transistors Q301 and Q302. The base of transistor Q301 is connected to... VDD3.3, the emitter is connected to pin 74 of the MCU chip U1, the collector is connected to one end of resistor R207 and pin 3 of interface X5, the other end of resistor R207 is connected to VCC, the base of transistor Q302 is connected to one end of resistor R209, the emitter is connected to pin 1 of interface X5, the collector is connected to one end of resistor R208 and pin 73 of the MCU chip U1, the other end of resistor R208 is connected to the other end of resistor R209 and connected to VDD3.3;

[0007] The LCD screen interface unit includes a TFT40 interface J3 and a voltage regulator chip U9. Pin 5 of the voltage regulator chip U9 is connected to VCC, one end of capacitor E106, and one end of inductor L3. The other end of inductor L3 is connected to the anode of diode D1 and pin 1 of the voltage regulator chip U9. The cathode of diode D1 is connected to one end of capacitor C12 and pin 2 of the TFT40 interface J3. Pin 3 of the voltage regulator chip U9 is connected to one end of resistor R115. The other end of resistor R115 is connected to one end of resistor R10 and pin 1 of the TFT40 interface. Pin 4 of the voltage regulator chip U9 is connected to one end of resistor R306 and one end of resistor R801. The other end of resistor R306 is connected to pin 110 of the MCU chip U1. The other ends of capacitor E106, resistor R801, resistor R10, capacitor C12, and pin 2 of the voltage regulator chip U9 are all grounded.

[0008] The host computer interface unit includes a host computer power supply module, optocoupler G101, optocoupler G102, and optocoupler G103. The host computer power supply module includes a power module U501. Pin 2 of the power module U501 is connected to one end of capacitor E501, one end of capacitor C123, and VCC. Pin 1 of the power module U501 is connected to the other end of capacitor E501 and the other end of capacitor C123 and grounded. Pin 4 of the power module U501 is connected to one end of capacitor E101, one end of capacitor C119, one end of capacitor C120, one end of capacitor C121, and capacitor C12... 2. One end outputs VCC1. Pin 3 of the power module U501 is connected to the other end of capacitor E101, capacitor C119, capacitor C120, capacitor C121, and capacitor C122, and grounded. Pin 5 of the optocoupler G101 is connected to one end of resistor R201 and pins 58, 4 of the MCU chip U1 is grounded, pin 6 is connected to VCC, pin 1 is connected to VCC1, and pin 3 is connected to one end of resistor R903. The other end of resistor R903 is connected to pin 1 of the MAX485 chip U701. Pin 1 of the optocoupler G102 is connected to VDD. 3.3. Pin 3 is connected to one end of resistor R901; pin 6 is connected to VCC1 and one end of resistor R202; pin 5 is connected to one end of resistor R203 and the other end of resistor R202; pin 4 is grounded. The other end of resistor R901 is connected to pin 60 of the MCU chip U1; the other end of resistor R203 is connected to the base of transistor Q201; the emitter of transistor Q201 is connected to VCC1; the collector is connected to one end of resistor R204; and pins 2 and 3 of the MAX485 chip U701 are connected to the collector. Pin 1 of optocoupler G103 is connected to VDD. 3.3. Pin 3 is connected to... One end of resistor R902, pin 6 is connected to VCC1; pin 5 is connected to one end of resistor R205 and pin 4 of the MAX485 chip U701, and pin 4 is grounded. Pin 8 of the MAX485 chip U701 is connected to one end of resistor R114 and VCC1; pin 6 is connected to one end of resistor R609; pin 7 is connected to one end of resistor R610; pin 5 is connected to one end of resistor R113 and ground. The other end of resistor R114 is connected to pin 1 of interface X1 and the other end of resistor R609; the other end of resistor R113 is connected to pin 2 of interface X1 and the other end of resistor R610.

[0009] The alarm data acquisition card unit includes a communication chip U601. Pin 1 of the communication chip U601 is connected to pin 141 of the MCU chip U1, pin 4 is connected to pin 142 of the MCU chip U1, pins 2 and 3 are connected and connected to pin 79 of the MCU chip U1 and one end of resistor R303. The other end of resistor R303 is connected to VDD3.3. Pin 8 of the communication chip U601 is connected to one end of resistor R124 and VDD3.3, pin 6 is connected to one end of resistor R601, pin 7 is connected to one end of resistor R602, and pin 5 is connected to one end of resistor R125 and ground. The other end of resistor R124 is connected to the other end of resistor R601 and is connected to pin 1 of interface X2. The other end of resistor R125 is connected to the other end of resistor R602 and is connected to pin 2 of interface X2.

[0010] The data storage unit interface includes an SD card interface U6, and the wireless communication module interface includes a communication interface U4.

[0011] The audible and visual alarm module includes an audible and visual interface unit and an indicator light unit. The audible and visual interface unit includes a transistor Q1. The base of transistor Q1 is connected to one end of resistor R39 and one end of resistor R57, and the collector is connected to the anode of diode D14. The cathode of diode D14 is connected to one end of resistor R802, the cathode of diode D27, and one end of fuse F9. The emitter of transistor Q1 is connected to the other end of resistor R57, the other end of resistor R802, one end of capacitor C51, and a 24V power supply. The other end of capacitor C51 is grounded. The other end of resistor R39 is connected to pin 12 of latch U102. The fuse... The other end is connected to one end of resistor R807, one end of the sound and light alarm interface X6, and one end of resistor R806. The other end of resistor R806 is connected to the non-inverting input of comparator U21C and the inverting input of comparator U21D. The inverting input of comparator U21C is connected to one end of resistor R37 and one end of resistor R38. The other end of resistor R38 is grounded. The non-inverting input of comparator U21D is connected to one end of resistor R117 and the other end of resistor R37. The other end of resistor R117 is connected to VCC. The output of comparator U21C is connected to one end of transistor D8. The output of comparator U21D is connected to... One end of transistor D7 is connected to the other two ends of comparator U21C and comparator U21D, which are then connected to pin 139 of MCU chip U1. The other end of the sound and light alarm interface X6 is connected to one end of resistor R58, one end of fuse F8, and one end of resistor R805. The other end of resistor R805 is connected to the non-inverting input of comparator U21A and the inverting input of comparator U21B. The inverting input of comparator U21A is connected to one end of resistor R804 and the anode of diode D13. The cathode of diode D13 is grounded. The non-inverting input of comparator U21B is connected to one end of resistor R803 and... The other end of resistor R804 and the other end of resistor R803 are connected to a 24V power supply. The output of comparator U21A is connected to one end of transistor D10, and the output of comparator U21B is connected to one end of transistor D9. The other two ends of comparator U21A and the other two ends of comparator U21B are connected to pin 140 of MCU chip U1. The other end of fuse F8 is connected to the anode of diode D16, and the cathode of diode D16 is connected to the anode of diode D15. The anode of diode D27, the other end of resistor R807, the other end of resistor R58, and the cathode of diode D15 are all grounded.The indicator unit includes a tri-state transceiver U201, a latch U101, and a latch U102. Pins 11 to 18 of the tri-state transceiver U201 are connected to the MCU chip U1. Pins 2 to 9 of the tri-state transceiver U201 are connected to pins 2 to 9 of the latch U101 and the latch U102. Pin 19 of the latch U101 is connected to the main power indicator LED101 via resistor R101. Pin 18 of the latch U101 is connected to the backup power indicator LED102 via resistor R102. Pin 17 of the latch U101 is connected to the fire alarm indicator LED103 via resistor R103. Pin 16 of the latch U101 is connected to the fault indicator LED104 via resistor R104. Pin 15 of the latch U101 is connected to the power supply... Resistor R105 connects to the mute indicator LED105. Pin 14 of latch U101 is connected to the sound-activated indicator LED106 via resistor R106. Pin 13 of latch U101 is connected to the audible and visual fault indicator LED107 via resistor R107. Pin 12 of latch U101 is connected to the manual indicator LED108 via resistor R108. Pin 19 of latch U102 is connected to the automatic indicator LED109 via resistor R109. Pin 18 of latch U102 is connected to the humidity alarm indicator LED110 via resistor R110. Pin 17 of latch U102 is connected to the information transmission indicator LED111 via resistor R111. Pin 16 of latch U102 is connected to the information receiving indicator LED112 via resistor R112.

[0012] By adopting this utility model, real-time monitoring of humidity inside warehouses and other places is realized through the integration of humidity sensors. When the humidity in the environment exceeds the preset threshold, the fire alarm controller will immediately issue an alarm signal and upload it to the host computer. Upon receiving the signal, the host computer will initiate corresponding emergency measures. By combining humidity detection technology with traditional fire alarm technology, comprehensive monitoring and early warning of fire risks are realized. This integration not only improves the performance of the fire early warning system, but also provides a more flexible and reliable option for fire prevention and control in different scenarios. Attached Figure Description

[0013] Figure 1 This is a hardware principle block diagram of the present invention;

[0014] Figure 2 This is the schematic diagram of the CPU main control unit circuit.

[0015] Figure 3 This is the schematic diagram of the LCD screen interface unit circuit.

[0016] Figure 4 This is a schematic diagram of a humidity sensor circuit.

[0017] Figure 5 This is the schematic diagram of the host computer interface unit circuit.

[0018] Figure 6 This is the circuit schematic of the switching power supply unit;

[0019] Figure 7 This is the circuit schematic of the alarm data acquisition card unit.

[0020] Figure 8 This is the schematic diagram of the interface circuit for the data storage unit.

[0021] Figure 9 This is the schematic diagram of the interface circuit for the wireless communication module.

[0022] Figure 10 This is the circuit schematic diagram of the sound and light alarm module;

[0023] Figure 11 This is a schematic diagram of the audible and visual alarm status;

[0024] Figure 12 This is a schematic diagram of a USB interface circuit. Detailed Implementation

[0025] See Figure 1 As shown, a fire alarm controller with humidity detection function includes a main control board, which includes a CPU main control unit, an LCD screen interface unit, a humidity sensor, a host computer interface unit, a switching power supply unit, an alarm data acquisition card unit, a data storage unit interface, a wireless communication module interface, and an audible and visual alarm module.

[0026] See Figure 2 As shown, the CPU main control unit includes an STM32H743ZI MCU chip U1, which performs system control of the entire fire alarm.

[0027] See Figure 3As shown, the LCD screen interface unit includes a TFT40 interface J3 and a voltage regulator chip U9. Pin 5 of the voltage regulator chip U9 is connected to VCC, one end of capacitor E106, and one end of inductor L3. The other end of inductor L3 is connected to the anode of diode D1 and pin 1 of the voltage regulator chip U9. The cathode of diode D1 is connected to one end of capacitor C12 and pin 2 of TFT40 interface J3. Pin 3 of the voltage regulator chip U9 is connected to one end of resistor R115. The other end of resistor R115 is connected to one end of resistor R10 and pin 1 of the TFT40 interface. Pin 4 of the voltage regulator chip U9 is connected to one end of resistor R306 and one end of resistor R801. The other end of resistor R306 is connected to pin 110 of MCU chip U1. The other ends of capacitor E106, resistor R801, resistor R10, capacitor C12, and pin 2 of voltage regulator chip U9 are all grounded. An external display screen can be connected to display information such as temperature and humidity.

[0028] See Figure 4 As shown, the humidity sensor is a sensor chip X9 with model number HTU21D. Pins 3 and 4 of the sensor chip X9 are connected to pins 27 and 28 of the MCU chip U1, respectively. The humidity sensor is used to monitor the external humidity in real time. When the humidity exceeds the alarm value set in the controller, the controller should issue an audible and visual alarm. The humidity value can also be displayed in real time on the LCD screen or queried manually, and can be freely set according to the customer's habits.

[0029] See Figure 5As shown, the host computer interface unit includes a host computer power supply module, optocoupler G101, optocoupler G102, and optocoupler G103. The host computer power supply module includes a power module U501. Pin 2 of the power module U501 is connected to one end of capacitor E501, one end of capacitor C123, and VCC. Pin 1 of the power module U501 is connected to the other end of capacitor E501 and the other end of capacitor C123 and grounded. Pin 4 of the power module U501 is connected to one end of capacitor E101, one end of capacitor C119, one end of capacitor C120, one end of capacitor C121, and one end of capacitor C123. One end of the 22-pin connector outputs VCC1. Pin 3 of the power module U501 is connected to the other ends of capacitors E101, C119, C120, C121, and C122, and grounded. Pin 5 of the optocoupler G101 is connected to one end of resistor R201 and pins 58 and 4 of the MCU chip U1. Pin 6 is connected to VCC, pin 1 is connected to VCC1, and pin 3 is connected to one end of resistor R903. The other end of resistor R903 is connected to pin 1 of the MAX485 chip U701. Pin 1 of the optocoupler G102 is connected to VDD3. 3. Pin 3 is connected to one end of resistor R901; pin 6 is connected to VCC1 and one end of resistor R202; pin 5 is connected to one end of resistor R203 and the other end of resistor R202; pin 4 is grounded; the other end of resistor R901 is connected to pin 60 of MCU chip U1; the other end of resistor R203 is connected to the base of transistor Q201; the emitter of transistor Q201 is connected to VCC1; the collector is connected to one end of resistor R204; pins 2 and 3 of MAX485 chip U701; pin 1 of optocoupler G103 is connected to VDD. 3.3. Pin 3 is connected to one end of resistor R902. Pins 6 and 7 are connected to VCC1, pin 8 is connected to one end of resistor R205 and pin 4 of MAX485 chip U701, and pin 4 is grounded. Pin 8 of MAX485 chip U701 is connected to one end of resistor R114 and VCC1, pin 6 is connected to one end of resistor R609, pin 7 is connected to one end of resistor R610, and pin 5 is connected to one end of resistor R113 and ground. The other end of resistor R114 is connected to pin 1 of interface X1 and the other end of resistor R609, and the other end of resistor R113 is connected to pin 2 of interface X1 and the other end of resistor R610. This is responsible for real-time communication and transmission with the host computer.

[0030] See Figure 6As shown, the switching power supply unit includes a 24V to 5V circuit, a 5V to 3.3V circuit, and a power status signal detection circuit. The 24V to 5V circuit includes an LM2576 voltage regulator module U2 and outputs VCC. The 5V to 3.3V circuit includes an SPX1117M3-3.3 voltage regulator chip U3 and outputs VDD3.3. The power status signal detection circuit includes transistors Q301 and Q302. The base of transistor Q301 is connected to VDD3.3 through resistor R206, and its emitter is connected to the MCU chip U1. Pin 74, the collector is connected to one end of resistor R207 and pin 3 of interface X5, the other end of resistor R207 is connected to VCC, the base of transistor Q302 is connected to one end of resistor R209, the emitter is connected to pin 1 of interface X5, the collector is connected to one end of resistor R208 and pin 73 of MCU chip U1, the other end of resistor R208 is connected to the other end of resistor R209 and connected to VDD3.3; it can provide 5V power supply and 3V power supply output, the power status signal detection circuit can monitor the power supply status and transmit it to the MCU unit.

[0031] See Figure 7 As shown, the alarm data acquisition card unit includes a communication chip U601. Pin 1 of the communication chip U601 is connected to pin 141 of the MCU chip U1, pin 4 is connected to pin 142 of the MCU chip U1, pins 2 and 3 are connected to pin 79 of the MCU chip U1 and one end of resistor R303. The other end of resistor R303 is connected to VDD3.3. Pin 8 of the communication chip U601 is connected to one end of resistor R124 and VDD3.3, pin 6 is connected to one end of resistor R601, pin 7 is connected to one end of resistor R602, and pin 5 is connected to one end of resistor R125 and ground. The other end of resistor R124 is connected to the other end of resistor R601 and is connected to pin 1 of interface X2. The other end of resistor R125 is connected to the other end of resistor R602 and is connected to pin 2 of interface X2. It is responsible for real-time communication and transmission with the data acquisition card to monitor the real-time status of the fire detector.

[0032] See Figure 8 As shown, the data storage unit interface includes an SD card interface U6, which can be used to store information such as fire alarms, fault power-on, power-off, and some personnel operation records.

[0033] See Figure 9 As shown, the wireless communication module interface includes communication interface U4, which is responsible for communication transmission with the host computer or fire protection maintenance personnel.

[0034] See Figure 10 , Figure 11As shown, the audible and visual alarm module includes an audible and visual interface unit and an indicator light unit. The audible and visual interface unit includes a transistor Q1. The base of transistor Q1 is connected to one end of resistor R39 and one end of resistor R57, and the collector is connected to the anode of diode D14. The cathode of diode D14 is connected to one end of resistor R802, the cathode of diode D27, and one end of fuse F9. The emitter of transistor Q1 is connected to the other end of resistor R57, the other end of resistor R802, one end of capacitor C51, and a 24V power supply. The other end of capacitor C51 is grounded. The other end of resistor R39 is connected to pin 12 of latch U102. The other end of the fuse is connected to one end of resistor R807, one end of the X6 interface of the audible and visual alarm, and one end of resistor R806. The other end of resistor R806 is connected to the non-inverting input of comparator U21C and the inverting input of comparator U21D. The inverting input of comparator U21C is connected to one end of resistor R37 and one end of resistor R38. The other end of resistor R38 is grounded. The non-inverting input of comparator U21D is connected to one end of resistor R117 and the other end of resistor R37. The other end of resistor R117 is connected to VCC. The output of comparator U21C is connected to one end of transistor D8. The output of comparator U21D... One end of the output is connected to transistor D7. The other two ends of comparator U21C and comparator U21D are connected to pin 139 of MCU chip U1. The other end of the sound and light alarm interface X6 is connected to one end of resistor R58, one end of fuse F8, and one end of resistor R805. The other end of resistor R805 is connected to the non-inverting input of comparator U21A and the inverting input of comparator U21B. The inverting input of comparator U21A is connected to one end of resistor R804 and the anode of diode D13. The cathode of diode D13 is grounded. The non-inverting input of comparator U21B is connected to resistor R803. One end of the resistor is connected to the other end of resistor R804, and the other end of resistor R803 is connected to a 24V power supply. The output of comparator U21A is connected to one end of transistor D10, and the output of comparator U21B is connected to one end of transistor D9. The other two ends of comparator U21A and the other two ends of comparator U21B are connected to pin 140 of MCU chip U1. The other end of fuse F8 is connected to the anode of diode D16, and the cathode of diode D16 is connected to the anode of diode D15. The anode of diode D27, the other end of resistor R807, the other end of resistor R58, and the cathode of diode D15 are all grounded.The indicator unit includes a tri-state transceiver U201, a latch U101, and a latch U102. Pins 11 to 18 of the tri-state transceiver U201 are connected to the MCU chip U1. Pins 2 to 9 of the tri-state transceiver U201 are connected to pins 2 to 9 of both latch U101 and latch U102. Pin 19 of latch U101 is connected to the main power indicator LED101 via resistor R101. Pin 18 of latch U101 is connected to the backup power indicator LED102 via resistor R102. Pin 17 of latch U101 is connected to the fire alarm indicator LED103 via resistor R103. Pin 16 of latch U101 is connected to the fault indicator LED104 via resistor R104. Pin 15 of latch U101 is connected to the fault indicator LED104 via resistor R105. Pin 5 of latch U101 is connected to the silence indicator LED105. Pin 14 of latch U101 is connected to the sound-activated indicator LED106 via resistor R106. Pin 13 of latch U101 is connected to the audible and visual fault indicator LED107 via resistor R107. Pin 12 of latch U101 is connected to the manual indicator LED108 via resistor R108. Pin 19 of latch U102 is connected to the automatic indicator LED109 via resistor R109. Pin 18 of latch U102 is connected to the humidity alarm indicator LED110 via resistor R110. Pin 17 of latch U102 is connected to the information transmission indicator LED111 via resistor R111. Pin 16 of latch U102 is connected to the information receiving indicator LED112 via resistor R112. In case of fire, malfunction, or other abnormal situations, the audible and visual alarm will automatically activate to alert on-duty personnel. On-duty personnel should immediately verify the actual situation on site and then take appropriate emergency measures.

[0035] See Figure 12 As shown, there is a USB interface x3, which can be used to upload or download data, and can also be used for upgrading the main control unit.

[0036] This utility model's fire alarm controller with humidity detection function is an important component of intelligent fire protection systems, and its performance and application effects directly affect the reliability and accuracy of the entire system. In the future, with continuous technological advancements and the expansion of application scenarios, intelligent fire protection systems will play an increasingly important role in fire early warning and prevention, and the fire alarm controller with humidity detection function will become one of the key devices within it. The fire alarm controller with humidity detection function has broad application prospects and significant importance in the field of fire early warning and prevention. By monitoring humidity changes in warehouses and other locations in real time and combining this with comprehensive analysis of other fire characteristic parameters, comprehensive monitoring and early warning of fire risks can be achieved, providing stronger protection for people's lives and property.

Claims

1. A fire alarm controller with humidity detection function, comprising a main control board, characterized in that, The main control board includes a CPU main control unit, an LCD screen interface unit, a humidity sensor, a host computer interface unit, a switching power supply unit, an alarm data acquisition card unit, a data storage unit interface, a wireless communication module interface, and an audible and visual alarm module; the humidity sensor is used to monitor the external humidity in real time.

2. A fire alarm controller with humidity detection function according to claim 1, characterized in that, The CPU main control unit includes an MCU chip U1 with model number STM32H743ZI, and the humidity sensor is a sensor chip X9 with model number HTU21D. Pins 3 and 4 of the sensor chip X9 are connected to pins 27 and 28 of the MCU chip U1, respectively.

3. A fire alarm controller with humidity detection function according to claim 2, characterized in that, The switching power supply unit includes a 24V to 5V circuit, a 5V to 3.3V circuit, and a power status signal detection circuit. The 24V to 5V circuit includes an LM2576 voltage regulator module U2 and outputs VCC. The 5V to 3.3V circuit includes an SPX1117M3-3.3 voltage regulator chip U3 and outputs VDD3.

3. The power status signal detection circuit includes transistors Q301 and Q302. The base of transistor Q301 is connected to... VDD3.3, the emitter is connected to pin 74 of the MCU chip U1, the collector is connected to one end of resistor R207 and pin 3 of interface X5, the other end of resistor R207 is connected to VCC, the base of transistor Q302 is connected to one end of resistor R209, the emitter is connected to pin 1 of interface X5, the collector is connected to one end of resistor R208 and pin 73 of the MCU chip U1, the other end of resistor R208 is connected to the other end of resistor R209 and connected to VDD3.

3.

4. A fire alarm controller with humidity detection function according to claim 2, characterized in that, The LCD screen interface unit includes a TFT40 interface J3 and a voltage regulator chip U9. Pin 5 of the voltage regulator chip U9 is connected to VCC, one end of capacitor E106, and one end of inductor L3. The other end of inductor L3 is connected to the anode of diode D1 and pin 1 of the voltage regulator chip U9. The cathode of diode D1 is connected to one end of capacitor C12 and pin 2 of the TFT40 interface J3. Pin 3 of the voltage regulator chip U9 is connected to one end of resistor R115. The other end of resistor R115 is connected to one end of resistor R10 and pin 1 of the TFT40 interface. Pin 4 of the voltage regulator chip U9 is connected to one end of resistor R306 and one end of resistor R801. The other end of resistor R306 is connected to pin 110 of the MCU chip U1. The other ends of capacitor E106, resistor R801, resistor R10, capacitor C12, and pin 2 of the voltage regulator chip U9 are all grounded.

5. A fire alarm controller with humidity detection function according to claim 2, characterized in that, The host computer interface unit includes a host computer power supply module, optocoupler G101, optocoupler G102, and optocoupler G103. The host computer power supply module includes a power module U501. Pin 2 of the power module U501 is connected to one end of capacitor E501, one end of capacitor C123, and VCC. Pin 1 of the power module U501 is connected to the other end of capacitor E501 and the other end of capacitor C123 and grounded. Pin 4 of the power module U501 is connected to one end of capacitor E101, one end of capacitor C119, one end of capacitor C120, one end of capacitor C121, and capacitor C12...

2. One end outputs VCC1. Pin 3 of the power module U501 is connected to the other end of capacitor E101, capacitor C119, capacitor C120, capacitor C121, and capacitor C122, and grounded. Pin 5 of the optocoupler G101 is connected to one end of resistor R201 and pins 58, 4 of the MCU chip U1 is grounded, pin 6 is connected to VCC, pin 1 is connected to VCC1, and pin 3 is connected to one end of resistor R903. The other end of resistor R903 is connected to pin 1 of the MAX485 chip U701. Pin 1 of the optocoupler G102 is connected to VDD. 3.

3. Pin 3 is connected to one end of resistor R901; pin 6 is connected to VCC1 and one end of resistor R202; pin 5 is connected to one end of resistor R203 and the other end of resistor R202; pin 4 is grounded. The other end of resistor R901 is connected to pin 60 of the MCU chip U1; the other end of resistor R203 is connected to the base of transistor Q201; the emitter of transistor Q201 is connected to VCC1; the collector is connected to one end of resistor R204; and pins 2 and 3 of the MAX485 chip U701 are connected to the collector. Pin 1 of optocoupler G103 is connected to VDD. 3.

3. Pin 3 is connected to... One end of resistor R902, pin 6 is connected to VCC1; pin 5 is connected to one end of resistor R205 and pin 4 of the MAX485 chip U701, and pin 4 is grounded. Pin 8 of the MAX485 chip U701 is connected to one end of resistor R114 and VCC1; pin 6 is connected to one end of resistor R609; pin 7 is connected to one end of resistor R610; pin 5 is connected to one end of resistor R113 and ground. The other end of resistor R114 is connected to pin 1 of interface X1 and the other end of resistor R609; the other end of resistor R113 is connected to pin 2 of interface X1 and the other end of resistor R610.

6. A fire alarm controller with humidity detection function according to claim 2, characterized in that, The alarm data acquisition card unit includes a communication chip U601. Pin 1 of the communication chip U601 is connected to pin 141 of the MCU chip U1, pin 4 is connected to pin 142 of the MCU chip U1, pins 2 and 3 are connected to pin 79 of the MCU chip U1 and one end of resistor R303. The other end of resistor R303 is connected to VDD3.

3. Pin 8 of the communication chip U601 is connected to one end of resistor R124 and VDD3.3, pin 6 is connected to one end of resistor R601, pin 7 is connected to one end of resistor R602, and pin 5 is connected to one end of resistor R125 and ground. The other end of resistor R124 is connected to the other end of resistor R601 and is connected to pin 1 of interface X2. The other end of resistor R125 is connected to the other end of resistor R602 and is connected to pin 2 of interface X2.

7. A fire alarm controller with humidity detection function according to claim 1, characterized in that, The data storage unit interface includes an SD card interface U6, and the wireless communication module interface includes a communication interface U4.

8. A fire alarm controller with humidity detection function according to claim 2, characterized in that, The audible and visual alarm module includes an audible and visual interface unit and an indicator light unit. The audible and visual interface unit includes a transistor Q1. The base of transistor Q1 is connected to one end of resistor R39 and one end of resistor R57, and the collector is connected to the anode of diode D14. The cathode of diode D14 is connected to one end of resistor R802, the cathode of diode D27, and one end of fuse F9. The emitter of transistor Q1 is connected to the other end of resistor R57, the other end of resistor R802, one end of capacitor C51, and a 24V power supply. The other end of capacitor C51 is grounded. The other end of resistor R39 is connected to pin 12 of latch U102. The fuse... The other end is connected to one end of resistor R807, one end of the sound and light alarm interface X6, and one end of resistor R806. The other end of resistor R806 is connected to the non-inverting input of comparator U21C and the inverting input of comparator U21D. The inverting input of comparator U21C is connected to one end of resistor R37 and one end of resistor R38. The other end of resistor R38 is grounded. The non-inverting input of comparator U21D is connected to one end of resistor R117 and the other end of resistor R37. The other end of resistor R117 is connected to VCC. The output of comparator U21C is connected to one end of transistor D8. The output of comparator U21D is connected to... One end of transistor D7 is connected to the other two ends of comparator U21C and comparator U21D, which are then connected to pin 139 of MCU chip U1. The other end of the sound and light alarm interface X6 is connected to one end of resistor R58, one end of fuse F8, and one end of resistor R805. The other end of resistor R805 is connected to the non-inverting input of comparator U21A and the inverting input of comparator U21B. The inverting input of comparator U21A is connected to one end of resistor R804 and the anode of diode D13. The cathode of diode D13 is grounded. The non-inverting input of comparator U21B is connected to one end of resistor R803 and... The other end of resistor R804 and the other end of resistor R803 are connected to a 24V power supply. The output of comparator U21A is connected to one end of transistor D10, and the output of comparator U21B is connected to one end of transistor D9. The other two ends of comparator U21A and the other two ends of comparator U21B are connected to pin 140 of MCU chip U1. The other end of fuse F8 is connected to the anode of diode D16, and the cathode of diode D16 is connected to the anode of diode D15. The anode of diode D27, the other end of resistor R807, the other end of resistor R58, and the cathode of diode D15 are all grounded.The indicator unit includes a tri-state transceiver U201, a latch U101, and a latch U102. Pins 11 to 18 of the tri-state transceiver U201 are connected to the MCU chip U1. Pins 2 to 9 of the tri-state transceiver U201 are connected to pins 2 to 9 of the latch U101 and the latch U102. Pin 19 of the latch U101 is connected to the main power indicator LED101 via resistor R101. Pin 18 of the latch U101 is connected to the backup power indicator LED102 via resistor R102. Pin 17 of the latch U101 is connected to the fire alarm indicator LED103 via resistor R103. Pin 16 of the latch U101 is connected to the fault indicator LED104 via resistor R104. Pin 15 of the latch U101 is connected to the power supply... Resistor R105 connects to the mute indicator LED105. Pin 14 of latch U101 is connected to the sound-activated indicator LED106 via resistor R106. Pin 13 of latch U101 is connected to the audible and visual fault indicator LED107 via resistor R107. Pin 12 of latch U101 is connected to the manual indicator LED108 via resistor R108. Pin 19 of latch U102 is connected to the automatic indicator LED109 via resistor R109. Pin 18 of latch U102 is connected to the humidity alarm indicator LED110 via resistor R110. Pin 17 of latch U102 is connected to the information transmission indicator LED111 via resistor R111. Pin 16 of latch U102 is connected to the information receiving indicator LED112 via resistor R112.

Images