Dual-input fire monitoring system and device

Abstract

The invention provides a dual-input fire-fighting monitoring system and device. The dual-input fire-fighting monitoring system comprises a fire-fighting loop terminal, a single-chip microcomputer information processing module, a power consumption limiting module, a topological relation establishing module and a dual-input monitored equipment terminal. The device is applied to a two-wire system fire control system, and can monitor the states of two fire fighting devices adopting switching value signal output at the same time. The device is applied to a fire-fighting system, has the function of feeding back the topological relation between monitored equipment and other fire-fighting system equipment through instructions, has the advantage of low-power-consumption operation, can be suitable for the fire-fighting system needing a large number of monitored fire-fighting equipment, and brings convenience to engineers for quickly mastering the topological relation of the fire-fighting system equipment. And the wiring pressure of the fire-fighting system is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of fire alarm technology, and in particular to a dual-input fire monitoring system and device. Background Art

[0002] Fire alarm systems are generally composed of trigger devices, alarm devices, linkage devices and other auxiliary devices. The automatic fire system enables people to detect fires at the first time, take effective measures, and can automatically and quickly handle serious fires in real time. Extinguishing early fires can minimize the loss of life and property. With the accelerated development of science and technology, fire alarms have also developed rapidly, but due to the long time span in the field of fire alarm technology, many of today's fire alarm systems do not match today's needs. With the continuous improvement of fire protection requirements, the types and number of fire protection equipment are constantly increasing, causing the topology of fire alarm systems to become more and more complex, and the resulting wiring has become very cumbersome, with large wiring investment, and a large number of fire protection equipment layouts and concealed engineering structures make later maintenance more and more difficult. This makes it urgent to have a dual-input fire monitoring module with simple wiring and feedback topology structure to solve the problems under the above technical background.

[0003] Patent application document CN105749474A discloses a fire equipment safety system, including a monitoring module, a single chip microcomputer, and a fire equipment safety lock control module; the monitoring module is electrically connected to the single chip microcomputer, and the single chip microcomputer is electrically connected to the fire equipment safety lock control module; the monitoring module is used to monitor whether a fire occurs in the area to be monitored, and send a signal to the single chip microcomputer, and the single chip microcomputer judges the signal and whether to send a command to release the safety lock to the fire equipment safety lock control module. However, this patent cannot completely solve the existing technical problems, nor can it meet the needs of the present invention. Summary of the invention

[0004] In view of the defects in the prior art, an object of the present invention is to provide a dual-input fire monitoring system and device.

[0005] The dual-input fire monitoring system provided by the present invention comprises: a fire circuit terminal, a single-chip information processing module, a power consumption limiting module, a topology relationship establishing module and a dual-input monitored device terminal;

[0006] The fire circuit terminal is used to connect the inlet and outlet connection lines of the fire control system using a connector, and transmit the fire control system communication signal to the single-chip information processing module, and at the same time supply power to the dual-input fire monitoring system through the fire circuit terminal;

[0007] The dual-input monitored equipment terminal is used to connect the fire-fighting equipment with two switch outputs to monitor its status and transmit the fire-fighting equipment monitoring signal to the single-chip information processing module;

[0008] The power consumption limiting module is used to limit the power supply current from the fire protection circuit terminal to the single-chip computer information processing module;

[0009] The topology relationship establishment module is used to receive the topology relationship signal transmitted from the fire protection circuit terminal, and transmit the topology relationship signal to the single-chip computer information processing module;

[0010] The single chip information processing module is used to receive and process signals from the fire protection circuit terminal, the dual input monitoring device terminal and the topology relationship establishment module.

[0011] Preferably, the fire protection circuit terminal includes: a 4PIN connector TB1, a diode VR1, resistors R2 and R3;

[0012] The TB1-1 and TB1-2 ports of the 4PIN connector are connected to the negative and positive output terminals of the fire control system loop signal line, and the TB1-3 and TB1-4 ports of the 4PIN connector are connected to the negative and positive input terminals of the fire control system loop signal line;

[0013] One end of the diode VR1 is connected to TB1-4 of the 4PIN connector, and the other end is grounded;

[0014] One end of the resistor R2 is connected to TB1-4 of the 4PIN connector, and the other end is connected to the single-chip microcomputer information processing module;

[0015] One end of the resistor R3 is connected to the TB1 - 4 end of the resistor R2 away from the 4-pin connector, and the other end is grounded.

[0016] Preferably, the dual-input monitored device terminal includes a 4PIN connector TB2, diodes VR2, VR3, resistors R29, R30, R31, R33, R34, R35;

[0017] The 4PIN connector TB2 is connected to two fire fighting devices with switch outputs;

[0018] One end of the diode VR2 is connected to the TB2-4 port of the 4PIN connector, and the other end is grounded;

[0019] One end of the diode VR3 is connected to the TB2-1 port of the 4PIN connector, and the other end is grounded;

[0020] One end of the resistor R29 is connected to the TB2-3 port of the 4PIN connector, and the other end is connected to the single-chip information processing module;

[0021] One end of the resistor R30 is connected to the TB2-1 port of the 4PIN connector, and the other end is connected to the single-chip information processing module;

[0022] One end of the resistor R31 is connected to the TB2-4 port of the 4PIN connector, and the other end is connected to the single-chip information processing module;

[0023] One end of the resistor R33 is connected to the TB2-3 end of the 4PIN connector away from the resistor R29, and the other end is grounded;

[0024] One end of the resistor R34 is connected to the TB2-1 end of the 4PIN connector away from the resistor R30, and the other end is grounded;

[0025] One end of the resistor R35 is connected to the TB2-4 terminal of the 4PIN connector, which is away from the resistor R31, and the other end is grounded.

[0026] Preferably, the single-chip information processing module includes a single-chip computer U3;

[0027] The single chip microcomputer U3 is connected to the power consumption limiting module;

[0028] Pins 8, 23, and 47 of the single-chip computer U3 are grounded;

[0029] The PA00 pin of the single chip microcomputer U3 is connected to the R2 resistor;

[0030] The PA01, PA02, and PA03 pins of the single-chip computer U3 are connected to the R29, R30, and R31 resistors;

[0031] The PA05 pin of the single chip microcomputer U3 is connected to the topology relationship establishment module;

[0032] The PB12 pin of the single chip microcomputer U3 is connected to the topology relationship establishing module.

[0033] Preferably, the power consumption limiting module includes a diode D1, transistors Q1, Q2, Q3, resistors R1, R8, R9, a linear regulator U1, and a capacitor C8;

[0034] One end of the diode D1 is connected to TB1-4 of the 4PIN connector, and the other end is connected to the collector of the transistor Q2;

[0035] The emitter of the transistor Q2 is connected to the base of the transistor Q1, and the base of the transistor Q2 is connected to the collector of the transistor Q1;

[0036] The emitter of the transistor Q1 is connected to the collector of the transistor Q3;

[0037] The emitter of the transistor Q3 is connected to the input end of the linear regulator U1;

[0038] The resistor R1 is connected in parallel between the base and collector of the transistor Q2;

[0039] The resistor R8 is connected in parallel between the base and collector of the transistor Q3;

[0040] One end of the resistor R9 is connected to the base of the transistor Q1, and the other end is connected to the input end of the linear regulator U1;

[0041] The ground pin of the linear regulator U1 is grounded, and the output pin is connected to the power pins 9, 24, and 48 of the microcontroller U3;

[0042] One end of the capacitor C8 is connected to the output pin of the linear regulator U1, and the other end is grounded.

[0043] Preferably, the topology relationship establishing module includes an operational amplifier U2, resistors R22, R24, R25, R26, R27, and capacitors C17 and C18;

[0044] The power supply pin VCC of the operational amplifier U2 is connected to the pin PB12 of the single-chip microcomputer, the output pin of channel 1 is connected to the single-chip microcomputer PA05, and the ground pin of the operational amplifier U2 is grounded;

[0045] One end of the resistor R22 is connected to the output pin of the linear regulator U1, and the other end is connected to the positive electrode of the input pin of channel 1 of the operational amplifier U2;

[0046] One end of the resistor R24 ​​is connected to TB1-1 of the 4PIN connector, and the other end is connected to the positive electrode of the input pin of channel 1 of the operational amplifier U2;

[0047] One end of the resistor R25 is connected to the resistor R27 away from the positive terminal of the input pin of channel 1 of the operational amplifier U2, and the other end is grounded;

[0048] One end of the resistor R26 is connected to TB1-1 of the 4PIN connector, and the other end is grounded;

[0049] One end of the resistor R27 is connected to the output end of channel 1 of the operational amplifier U2, and the other end is connected to the resistor R25 away from the ground.

[0050] The dual-input fire monitoring device provided by the present invention includes the dual-input fire monitoring system.

[0051] Compared with the prior art, the present invention has the following beneficial effects:

[0052] (1) The present invention provides a dual-input fire monitoring system, in which the power supply signal of the transistor U2 is provided by the single-chip microcomputer U3, so that the operational amplifier is powered only when it is working. This control method can better control power consumption; the signal fed back by the dual-input fire monitoring module located after the dual-input fire monitoring module will pass through the resistor R26 and be amplified by the operational amplifier U2 before being input into the single-chip microcomputer U3, while the signal fed back by the dual-input fire monitoring module located before the dual-input fire monitoring module will not pass through the resistor R26. This mode enables the fire control system to automatically obtain the topological position of the dual-input fire monitoring module through communication and draw a topological structure diagram, which greatly reduces the maintenance pressure of the fire control system; the resistors R22 and R25 provide polar line voltages to make the topological signals received from other dual-input fire monitoring modules more stable;

[0053] (2) The present invention can be applied to a fire control system with two-wire communication. At the same time, a dual-input fire monitoring module can monitor two external fire equipment at the same time, which greatly reduces the wiring pressure of the fire control system. At the same time, the efficient power consumption control scheme can enable a maximum of 125 dual-input fire monitoring modules to be deployed in the fire control system to monitor 250 external fire equipment at the same time, which can more conveniently access various complex fire control systems. In addition, the fire control system can report its own topological position to the fire control system through communication so that the fire control system can form a topological structure diagram, which greatly facilitates the later maintenance of the fire control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0055] Figure 1 A schematic diagram showing the structure of an embodiment of the present invention;

[0056] Figure 2 A block diagram of an embodiment of the present invention;

[0057] Figure 3 A circuit diagram showing a fire protection circuit terminal according to an embodiment of the present invention;

[0058] Figure 4 A circuit diagram showing a single-chip information processing module according to an embodiment of the present invention;

[0059] Figure 5 A circuit diagram showing a power consumption limiting module according to an embodiment of the present invention;

[0060] Figure 6 A circuit diagram showing a topology relationship establishment module according to an embodiment of the present invention;

[0061] Figure 7 A dual-input monitored device connection terminal is shown for one embodiment of the present invention;

[0062] Figure markings: 1-fire monitoring module housing; 2-dual-input fire monitoring module circuit board; 3-dual-input fire monitoring module fire circuit terminal; 4-dual-input fire monitoring module monitored equipment terminal; 5-fire circuit terminal; 6-single-chip microcomputer information processing module; 7-power consumption limitation module; 8-topology relationship establishment module; 9-dual-input monitored equipment terminal. DETAILED DESCRIPTION

[0063] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0064] Example

[0065] The present invention provides a dual-input fire monitoring module, such as Figure 1 As shown, it includes a fire monitoring module housing 1, a dual-input fire monitoring module circuit board 2, a dual-input fire monitoring module fire circuit wiring terminal 3, and a dual-input fire monitoring module monitored equipment wiring terminal 4.

[0066] The fire monitoring module housing 1 is an overall protective shell of the module, which protects the dual-input fire monitoring module circuit board 2, and slots the dual-input fire monitoring module fire circuit wiring terminals 3 and the dual-input fire monitoring module monitored equipment wiring terminals 4 to provide external connection ports; the dual-input fire monitoring module fire circuit wiring terminals 3 and the dual-input fire monitoring module monitored equipment wiring terminals 4 provide the dual-input fire monitoring module circuit board 2 with a connection interface with the external fire circuit and the monitored equipment.

[0067] The present invention provides a dual-input fire monitoring module, such as Figure 2 As shown, it includes a fire protection circuit terminal 5, a single-chip information processing module 6, a power consumption limiting module 7, a topology relationship establishing module 8, and a dual-input monitored device terminal 9.

[0068] The fire protection circuit terminal 5 connects the two-wire fire protection control system signal to the dual-input fire protection monitoring module, the dual-input monitored device terminal 9 connects the two monitored fire protection equipment signals to the dual-input fire protection monitoring module, the topology relationship establishment module 8 connects the topology relationship signals of other equipment in the two-wire fire protection control system to the dual-input fire protection monitoring module, the single-chip computer information processing module 6 processes the information from the fire protection circuit terminal 5, the dual-input monitored device terminal 9, and the topology relationship establishment module 8 to complete the established functions, and the power consumption limiting module 7 supplies power to the single-chip computer and limits the working current of the single-chip computer to obtain lower power consumption.

[0069] like Figure 3 As shown, the 4PIN connector port is connected to the negative and positive terminals of the input terminal of the loop signal line of the fire control system;

[0070] One end of the diode VR1 is connected to the 4PIN connector TB1-4, and the other end is grounded; one end of the resistor R2 is connected to the 4PIN connector TB1-4, and the other end is connected to the PA00 pin of the microcontroller U3 described in Claim 4; one end of the resistor R3 is connected to the end of the resistor R2 away from the 4PIN connector TB1-4, and the other end is grounded.

[0071] The in-and-out signal lines of the two-wire fire control system are connected to the dual-input fire monitoring module through a 4PIN connector. The 9-20V voltage generated by the two-wire fire control system communication is connected to the microcontroller after being divided by resistors R2 and R3.

[0072] like Figure 4 The single-chip microcomputer U3 shown in the figure can be HC32L190JCT, the power pins 9, 24, 48 are connected to the output pins of the linear regulator U1 to access the 3.3V stable voltage, and the pins 8, 23, 47 are grounded; PA00 of the single-chip microcomputer U3 is connected to the resistor R2; PA01, PA02, PA03 of the single-chip microcomputer U3 are connected to the resistors R29, R30, R31; PA05 of the single-chip microcomputer U3 is connected to Figure 6 The output of channel 1 of operational amplifier U3 is connected to the PB12 pin of microcontroller U3. Figure 6 The supply pin of operational amplifier U3 is connected.

[0073] like Figure 5 The diode D1 is shown at one end and Figure 2The 4-pin connector TB1-4 is connected to the middle one, and the other end is connected to the collector of transistor Q2; the emitter of transistor Q2 is connected to the base of transistor Q1, and the base of transistor Q2 is connected to the collector of transistor Q1; the emitter of transistor Q1 is connected to the collector of transistor Q3; the emitter of transistor Q3 is connected to the input end of linear regulator U1; resistor R1 is connected in parallel between the base and collector of transistor Q2; resistor R8 is connected in parallel between the base and collector of transistor Q3; one end of resistor R9 is connected to the base of transistor Q1, and the other end is connected to the input end of linear regulator U1. The ground pin of linear regulator U1 is grounded, and the output pin is connected to Figure 4 The power pins 9, 24 and 48 of the single chip computer U3 are connected to each other; one end of the capacitor C8 is connected to the output pin of the linear regulator U1, and the other end is grounded.

[0074] The linear regulator U1 can provide a stable 3.3V output to power the microcontroller. At the same time, the current limiting circuit composed of transistors can limit the current provided to the microcontroller to reduce power consumption.

[0075] like Figure 6 The operational amplifier U2 shown can be AIP2904, the power supply pin VCC is connected to the PB12 pin of the microcontroller, the channel 1 output pin is connected to the microcontroller PA05, and the ground pin of the operational amplifier U2 is grounded; one end of the resistor R22 is connected to the output pin of the linear regulator U1, and the other end is connected to the positive electrode of the input pin of the channel 1 of the operational amplifier U2; one end of the resistor R24 ​​is connected to the 4PIN connector TB1-1, and the other end is connected to the positive electrode of the input pin of the channel 1 of the operational amplifier U2; one end of the resistor R25 is connected to the resistor R27 away from the positive end of the input pin of the channel 1 of the operational amplifier U2, and the other end is grounded; one end of the resistor R26 is connected to the 4PIN connector TB1-1 according to claim 2, and the other end is grounded; one end of the resistor R27 is connected to the output end of the channel 1 of the operational amplifier U2, and the other end is connected to the resistor R25 away from the ground end.

[0076] The topological current fed back by other modules in the fire control system will flow through the R26 resistor of each dual-input fire monitoring module through the communication signal line, and then be connected to the microcontroller after being amplified by the operational amplifier.

[0077] like Figure 7The connector TB2 shown is connected to two external switch output fire-fighting equipment; one end of the diode VR2 is connected to the 4PIN connector TB2-4 port, and the other end is grounded; one end of the diode VR3 is connected to the 4PIN connector TB2-1 port, and the other end is grounded; one end of the resistor R29 is connected to the 4PIN connector TB2-3 port and the other end is connected to the PA01 pin of the microcontroller U3 described in claim 4; one end of the resistor R30 is connected to the 4PIN connector TB2-1 port and the other end is connected to the PA02 pin of the microcontroller U3 described in claim 4; one end of the resistor R31 is connected to the 4PIN connector TB2-4 port and the other end is connected to the PA03 pin of the microcontroller U3 described in claim 4; a point of the resistor R33 is connected away from the resistor R29 and connected to the 4PIN connector TB2-3 end, and the other end is grounded; a point of the resistor R34 is connected away from the resistor R30 and connected to the 4PIN connector TB2-1 end, and the other end is grounded; a point of the resistor R35 is connected away from the resistor R31 and connected to the 4PIN connector TB2-4 end, and the other end is grounded.

[0078] The two external fire equipment signals are connected to the dual-input fire monitoring module through connector TB2, and are connected to the microcontroller after being divided by resistors R29, R33; R30, R34; R31, R35.

[0079] To sum up, when the communication signal of the two-wire fire control system is input into the dual-input fire monitoring module through the fire loop terminal 5, the communication between the dual-input fire monitoring module and the two-wire fire control system is completed after being processed by the single-chip microcomputer; the monitored signal output by the external fire-fighting equipment is input into the dual-input fire monitoring module through the dual-input monitored equipment terminal 9, and the external fire-fighting equipment status is sampled after being processed by the single-chip microcomputer; the power consumption limiting module 7 provides a stable voltage to the single-chip microcomputer, and at the same time limits the maximum working current to ensure the low power consumption operation of the dual-input fire monitoring module; the topology relationship establishment module 8 can establish the topology relationship between the dual-input fire monitoring module and other two-wire fire control system modules, which greatly facilitates the subsequent maintenance work.

[0080] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0081] Those skilled in the art know that, in addition to implementing the system, device and its various modules provided by the present invention in a purely computer-readable program code, it is entirely possible to implement the same program in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers and embedded microcontrollers by logically programming the method steps. Therefore, the system, device and its various modules provided by the present invention can be considered as a hardware component, and the modules included therein for implementing various programs can also be considered as structures within the hardware component; the modules for implementing various functions can also be considered as both software programs for implementing the method and structures within the hardware component.

[0082] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A dual-input fire monitoring system, characterized in that: include: Fire protection circuit terminal, single chip information processing module, power consumption limiting module, topology relationship establishment module and dual input monitored equipment terminal; The fire circuit terminal is used to connect the inlet and outlet connection lines of the fire control system using a connector, and transmit the fire control system communication signal to the single-chip information processing module, and at the same time supply power to the dual-input fire monitoring system through the fire circuit terminal; The dual-input monitored equipment terminal is used to connect the fire-fighting equipment with two switch outputs to monitor its status and transmit the fire-fighting equipment monitoring signal to the single-chip information processing module; The power consumption limiting module is used to limit the power supply current from the fire protection circuit terminal to the single-chip computer information processing module; The topology relationship establishment module is used to receive the topology relationship signal transmitted from the fire protection circuit terminal, and transmit the topology relationship signal to the single-chip computer information processing module; The single chip information processing module is used to receive and process signals from the fire protection circuit terminal, the dual input monitoring device terminal and the topology relationship establishment module.

2. The dual-input fire monitoring system according to claim 1, characterized in that: The fire protection circuit terminal includes: 4PIN connector TB1, diode VR1, resistors R2 and R3; The TB1-1 and TB1-2 ports of the 4PIN connector are connected to the negative and positive output terminals of the fire control system loop signal line, and the TB1-3 and TB1-4 ports of the 4PIN connector are connected to the negative and positive input terminals of the fire control system loop signal line; One end of the diode VR1 is connected to TB1-4 of the 4PIN connector, and the other end is grounded; One end of the resistor R2 is connected to TB1-4 of the 4PIN connector, and the other end is connected to the single-chip microcomputer information processing module; One end of the resistor R3 is connected to the TB1 - 4 end of the resistor R2 away from the 4-pin connector, and the other end is grounded.

3. The dual-input fire monitoring system according to claim 2, characterized in that: The dual-input monitored device terminal includes a 4-pin connector TB2, diodes VR2, VR3, resistors R29, R30, R31, R33, R34, R35; The 4PIN connector TB2 is connected to two fire fighting devices with switch outputs; One end of the diode VR2 is connected to the TB2-4 port of the 4PIN connector, and the other end is grounded; One end of the diode VR3 is connected to the TB2-1 port of the 4PIN connector, and the other end is grounded; One end of the resistor R29 is connected to the TB2-3 port of the 4PIN connector, and the other end is connected to the single-chip information processing module; One end of the resistor R30 is connected to the TB2-1 port of the 4PIN connector, and the other end is connected to the single-chip information processing module; One end of the resistor R31 is connected to the TB2-4 port of the 4PIN connector, and the other end is connected to the single-chip information processing module; One end of the resistor R33 is connected to the TB2-3 end of the 4PIN connector away from the resistor R29, and the other end is grounded; One end of the resistor R34 is connected to the TB2-1 end of the 4PIN connector away from the resistor R30, and the other end is grounded; One end of the resistor R35 is connected to the TB2-4 terminal of the 4PIN connector, which is away from the resistor R31, and the other end is grounded.

4. The dual-input fire monitoring system according to claim 3, characterized in that: The single-chip information processing module includes a single-chip U3; The single chip microcomputer U3 is connected to the power consumption limiting module; Pins 8, 23, and 47 of the single-chip computer U3 are grounded; The PA00 pin of the single chip microcomputer U3 is connected to the R2 resistor; The PA01, PA02, and PA03 pins of the single-chip computer U3 are connected to the R29, R30, and R31 resistors; The PA05 pin of the single chip microcomputer U3 is connected to the topology relationship establishment module; The PB12 pin of the single chip microcomputer U3 is connected to the topology relationship establishing module.

5. The dual-input fire monitoring system according to claim 4, characterized in that: The power consumption limiting module includes a diode D1, transistors Q1, Q2, Q3, resistors R1, R8, R9, a linear regulator U1, and a capacitor C8; One end of the diode D1 is connected to TB1-4 of the 4PIN connector, and the other end is connected to the collector of the transistor Q2; The emitter of the transistor Q2 is connected to the base of the transistor Q1, and the base of the transistor Q2 is connected to the collector of the transistor Q1; The emitter of the transistor Q1 is connected to the collector of the transistor Q3; The emitter of the transistor Q3 is connected to the input end of the linear regulator U1; The resistor R1 is connected in parallel between the base and collector of the transistor Q2; The resistor R8 is connected in parallel between the base and collector of the transistor Q3; One end of the resistor R9 is connected to the base of the transistor Q1, and the other end is connected to the input end of the linear regulator U1; The ground pin of the linear regulator U1 is grounded, and the output pin is connected to the power pins 9, 24, and 48 of the microcontroller U3; One end of the capacitor C8 is connected to the output pin of the linear regulator U1, and the other end is grounded.

6. The dual-input fire monitoring system according to claim 5, characterized in that: The topology relationship establishment module includes an operational amplifier U2, resistors R22, R24, R25, R26, R27, and capacitors C17 and C18; The power supply pin VCC of the operational amplifier U2 is connected to the pin PB12 of the single-chip microcomputer, the output pin of channel 1 is connected to the single-chip microcomputer PA05, and the ground pin of the operational amplifier U2 is grounded; One end of the resistor R22 is connected to the output pin of the linear regulator U1, and the other end is connected to the positive electrode of the input pin of channel 1 of the operational amplifier U2; One end of the resistor R24 ​​is connected to TB1-1 of the 4PIN connector, and the other end is connected to the positive electrode of the input pin of channel 1 of the operational amplifier U2; One end of the resistor R25 is connected to the resistor R27 away from the positive terminal of the input pin of channel 1 of the operational amplifier U2, and the other end is grounded; One end of the resistor R26 is connected to TB1-1 of the 4PIN connector, and the other end is grounded; One end of the resistor R27 is connected to the output end of channel 1 of the operational amplifier U2, and the other end is connected to the resistor R25 away from the ground.

7. A dual-input fire monitoring device, characterized in that: A dual-input fire monitoring system comprising any one of claims 1 to 6.

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