Intelligent fire safety gateway circuit
Patent Information
- Application Number
- CN202522302726.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-30
- Publication Date
- 2026-09-18
- Estimated Expiration
- 2035-10-30
AI Technical Summary
这些接口之间协议互不兼容，导致系统间形成“信息孤岛”，无法实现数据的互联互通与统一管理，极大地限制了智慧消防平台的整体性与效能
[0006] By adopting this utility model, the CPU control circuit and the CAN communication safety isolation circuit not only realize the conversion of CAN bus communication protocol, but also provide efficient electrical isolation protection between interfaces, effectively suppressing signal disturbances and equipment damage caused by ground potential difference, electromagnetic interference, etc., and greatly improving the stability and reliability of the system; furthermore, a 485 communication circuit is also set up, which can also realize the conversion of RS485 communication protocol.
Smart Images
Figure CN224774926U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fire alarm technology, specifically to a smart fire safety gateway circuit. Background Technology
[0002] A core challenge frequently encountered in the construction of intelligent fire protection systems is protocol heterogeneity. Different brands and models of fire protection equipment (such as gas extinguishing controllers, fire linkage controllers, and fire alarm controllers) often employ different physical communication interfaces and protocols, commonly RS-485 and CAN bus. The incompatibility of these interfaces leads to "information silos" between systems, hindering data interconnection and unified management, and severely limiting the overall integrity and effectiveness of the intelligent fire protection platform. Summary of the Invention
[0003] To address the aforementioned technical issues, this utility model provides a smart fire safety gateway circuit that enables protocol conversion and provides efficient electrical isolation protection between interfaces, thereby improving the stability and reliability of the system.
[0004] The technical solution is as follows: A smart fire safety gateway circuit, characterized in that it includes a CPU control circuit, a CAN communication security isolation circuit, and a system power supply circuit. The CPU control circuit includes a microcontroller U1. The CAN communication security isolation circuit includes two channels, one of which includes a CAN transceiver U6. Pin 1 of the CAN transceiver U6 is connected to one end of capacitor C113, one end of capacitor E101, and VCC. Pin 2 of the CAN transceiver U6 is connected to capacitor C113. 13. The other end of the capacitor E101 is connected to the other end of the CAN transceiver U6. Pin 3 of the CAN transceiver U6 is connected to one end of resistor R504 and the collector of transistor Q102. The base of transistor Q102 is connected to a 3.3V power supply through resistor R503. The emitter of transistor Q102 is connected to the microcontroller U1. Pin 5 of the CAN transceiver U6 is connected to the emitter of transistor Q101. The base of transistor Q101 is connected to one end of resistor R502. The other end of resistor R502 is connected to one end of resistor R501 and a 3.3V power supply. A 3V power supply is provided. The collector of transistor Q101 is connected to the other end of resistor R501 and the microcontroller U1. Pin 16 of CAN transceiver U6 is connected to one end of capacitor C114, one end of capacitor E102, and pin 11 of CAN transceiver U6. Pin 15 of CAN transceiver U6 is connected to the other end of capacitor C114, the other end of capacitor E102, pins 9 and 10 of CAN transceiver U6. Pin 13 of CAN transceiver U6 is connected to the cathode of TVS diode and one end of resistor R101. The other end of resistor R11 is connected to one end of fuse F101. The other end of fuse F101 is connected to one end of resistor R201 and pin 1 of common mode inductor L2. Pin 12 of CAN transceiver U6 is connected to one end of resistor R102 and the anode of TVS diode. The other end of resistor R102 is connected to one end of fuse F102. The other end of fuse F102 is connected to the other end of resistor R201 and pin 3 of common mode inductor L2. Pins 2 and 4 of common mode inductor L2 are connected to CAN communication external interface J2.
[0005] A further feature is that the microcontroller U1 is an STM32H743ZIT6, and the CPU control circuit also includes a data storage chip U2; The system power supply circuit includes a 485 communication circuit, a 485 communication external interface J3, and a power supply circuit. The 485 communication circuit includes a 485 communication chip U5. Pin 1 of the 485 communication chip U5 is connected to pin 102 of the microcontroller U1. Pins 2 and 3 of the 485 communication chip U5 are connected to one end of resistor R306 and pin 100 of the microcontroller U1. The other end of resistor R306 is connected to a 3.3V power supply. Pin 4 of the 485 communication chip U5 is connected to pin 101 of the microcontroller U1. Pin 8 of the 485 communication chip U5 is connected to a 3.3V power supply and one end of resistor R201. The other end of resistor R201 is connected to a resistor... One end of resistor R105 is connected to one end of fuse F105. The other end of resistor R105 is connected to pin 6 of the 485 communication chip U5. The other end of fuse F105 is connected to the 485 communication external interface J3. Pin 7 of the 485 communication chip U5 is connected to one end of resistor R106. The other end of resistor R106 is connected to one end of resistor R202 and one end of fuse F106. The other end of resistor R202 and pin 5 of the 485 communication chip U5 are both grounded. The other end of fuse F106 is connected to the 485 communication external interface J3. The power supply circuit includes a buck converter U3. Pin 2 of the buck converter U3 is connected to the cathode of diode D1 and one end of capacitor E9. The anode of diode D1 receives DC 24V. Pin 8 of the buck converter U3 is connected to one end of capacitor C112. Pin 6 of the buck converter U3 is connected to one end of capacitor C17. The other end of capacitor C17 is connected to one end of resistor R23. Pin 1 of the buck converter U3 is connected to one end of resistor R19. The other end of resistor R19 is connected to one end of capacitor C19. The other end of capacitor C19 is connected to one end of inductor L1 and diode D2. The cathode of the diode is connected to pin 3 of the buck converter U3. The other end of the inductor L1 outputs a 3.3V power supply and is connected to one end of capacitor E10, one end of capacitor E11, and one end of resistor R20. The other end of resistor R20 is connected to one end of resistor R21 and pin 5 of the buck converter U3. The other end of resistor R21 is connected to one end of resistor R22. The other ends of capacitor E9, capacitor C112, pin 4 of buck converter U3, resistor R23, the anode of diode D2, resistor R22, capacitor E10, and capacitor E11 are all grounded.
[0006] By adopting this utility model, the CPU control circuit and the CAN communication safety isolation circuit not only realize the conversion of CAN bus communication protocol, but also provide efficient electrical isolation protection between interfaces, effectively suppressing signal disturbances and equipment damage caused by ground potential difference, electromagnetic interference, etc., and greatly improving the stability and reliability of the system; furthermore, a 485 communication circuit is also set up, which can also realize the conversion of RS485 communication protocol. Attached Figure Description
[0007] Figure 1This is the schematic diagram of the CPU control circuit. Figure 2 Schematic diagram of a CAN communication security isolation circuit; Figure 3 This is the schematic diagram of the system power supply circuit. Detailed Implementation
[0008] See Figure 1 , Figure 2 , Figure 3 As shown, a smart fire safety gateway circuit includes a CPU control circuit, a CAN communication security isolation circuit, and a system power supply circuit. The CPU control circuit includes a microcontroller U1 and a data storage chip U2. The microcontroller U1 is an STM32H743ZIT6.
[0009] The CAN communication security isolation circuit consists of two identical circuit paths. One path includes a CAN transceiver U6, and the other includes a CAN transceiver U7, both model TDA51SCANHC. The following description focuses on one of these paths: Pin 1 of CAN transceiver U6 is connected to one end of capacitor C113, one end of capacitor E101, and VCC. Pin 2 of CAN transceiver U6 is connected to the other end of capacitor C113 and the other end of capacitor E101. Pin 3 of CAN transceiver U6 is connected to one end of resistor R504 and the collector of transistor Q102. The base of transistor Q102 is connected to a 3.3V power supply through resistor R503. The emitter of transistor Q102 is connected to pin 103 of microcontroller U1. Pin 5 of CAN transceiver U6 is connected to the emitter of transistor Q101. The base of transistor Q101 is connected to one end of resistor R502. The other end of resistor R502 is connected to one end of resistor R501 and the 3.3V power supply. The collector of Q101 is connected to the other end of resistor R501 and pin 104 of microcontroller U1. Pin 16 of CAN transceiver U6 is connected to one end of capacitor C114, one end of capacitor E102, and pin 11 of CAN transceiver U6. Pin 15 of CAN transceiver U6 is connected to the other end of capacitor C114, the other end of capacitor E102, and pins 9 and 10 of CAN transceiver U6. Pin 13 of CAN transceiver U6 is connected to the cathode of TVS diode and one end of resistor R101. The other end of R11 is connected to one end of fuse F101. The other end of fuse F101 is connected to one end of resistor R201 and pin 1 of common mode inductor L2. Pin 12 of CAN transceiver U6 is connected to one end of resistor R102 and the anode of TVS diode. The other end of resistor R102 is connected to one end of fuse F102. The other end of fuse F102 is connected to the other end of resistor R201 and pin 3 of common mode inductor L2. Pins 2 and 4 of common mode inductor L2 are connected to the CAN communication external interface J2.
[0010] The system power supply circuit includes a 485 communication circuit, a power supply and a 485 communication external interface J3, a power supply circuit and an indicator light circuit.
[0011] The 485 communication circuit includes a 485 communication chip U5. Pin 1 of the 485 communication chip U5 is connected to pin 102 of the microcontroller U1. Pins 2 and 3 of the 485 communication chip U5 are connected to one end of resistor R306 and pin 100 of the microcontroller U1. The other end of resistor R306 is connected to a 3.3V power supply. Pin 4 of the 485 communication chip U5 is connected to pin 101 of the microcontroller U1. Pin 8 of the 485 communication chip U5 is connected to a 3.3V power supply and one end of resistor R201. The other end of resistor R201 is connected to resistor R10. One end of resistor R105 is connected to one end of fuse F105. The other end of resistor R105 is connected to pin 6 of the 485 communication chip U5. The other end of fuse F105 is connected to the power supply and the external interface J3 of the 485 communication chip U5. Pin 7 of the 485 communication chip U5 is connected to one end of resistor R106. The other end of resistor R106 is connected to one end of resistor R202 and one end of fuse F106. The other end of resistor R202 and pin 5 of the 485 communication chip U5 are both grounded. The other end of fuse F106 is connected to the power supply and the external interface J3 of the 485 communication chip U5.
[0012] The power supply circuit includes a buck converter U3. Pin 2 of buck converter U3 is connected to the cathode of diode D1 and one end of capacitor E9. The anode of diode D1 receives DC 24V. Pin 8 of buck converter U3 is connected to one end of capacitor C112. Pin 6 of buck converter U3 is connected to one end of capacitor C17. The other end of capacitor C17 is connected to one end of resistor R23. Pin 1 of buck converter U3 is connected to one end of resistor R19. The other end of resistor R19 is connected to one end of capacitor C19. The other end of capacitor C19 is connected to one end of inductor L1 and the cathode of diode D2. Pin 3 of the buck converter U3, the other end of inductor L1 outputs 3.3V power and is connected to one end of capacitor E10, one end of capacitor E11 and one end of resistor R20. The other end of resistor R20 is connected to one end of resistor R21 and pin 5 of buck converter U3. The other end of resistor R21 is connected to one end of resistor R22. The other ends of capacitor E9, capacitor C112, pin 4 of buck converter U3, the other end of resistor R23, the anode of diode D2, the other end of resistor R22, the other end of capacitor E10, and the other end of capacitor E11 are all grounded.
[0013] The indicator light circuit includes resistor R203 and light-emitting diode LED1.
[0014] The gateway described in this application can integrate dispersed and heterogeneous subsystems into a unified, efficient, and highly reliable smart fire protection IoT system.
Claims
1. A smart fire safety gateway circuit, characterized in that, It includes a CPU control circuit, a CAN communication security isolation circuit, and a system power supply circuit. The CPU control circuit includes a microcontroller U1. The CAN communication security isolation circuit includes two channels, one of which includes a CAN transceiver U6. Pin 1 of the CAN transceiver U6 is connected to one end of capacitor C113, one end of capacitor E101, and VCC. Pin 2 of the CAN transceiver U6 is connected to the other end of capacitor C113 and the other end of capacitor E101. Pin 3 of the N transceiver U6 is connected to one end of resistor R504 and the collector of transistor Q102. The base of transistor Q102 is connected to a 3.3V power supply through resistor R503. The emitter of transistor Q102 is connected to the microcontroller U1. Pin 5 of the CAN transceiver U6 is connected to the emitter of transistor Q101. The base of transistor Q101 is connected to one end of resistor R502. The other end of resistor R502 is connected to one end of resistor R501 and a 3.3V power supply. The collector of the CAN transceiver U6 is connected to the other end of resistor R501 and the microcontroller U1. Pin 16 of the CAN transceiver U6 is connected to one end of capacitor C114, one end of capacitor E102, and pin 11 of the CAN transceiver U6. Pin 15 of the CAN transceiver U6 is connected to the other end of capacitor C114, the other end of capacitor E102, and pins 9 and 10 of the CAN transceiver U6. Pin 13 of the CAN transceiver U6 is connected to the cathode of the TVS diode and one end of resistor R101. The other end of resistor R11... One end of the CAN transceiver U6 is connected to one end of the fuse F101. The other end of the fuse F101 is connected to one end of the resistor R201 and pin 1 of the common mode inductor L2. Pin 12 of the CAN transceiver U6 is connected to one end of the resistor R102 and the anode of the TVS diode. The other end of the resistor R102 is connected to one end of the fuse F102. The other end of the fuse F102 is connected to the other end of the resistor R201 and pin 3 of the common mode inductor L2. Pins 2 and 4 of the common mode inductor L2 are connected to the CAN communication external interface J2.
2. The intelligent fire safety gateway circuit according to claim 1, characterized in that, The microcontroller U1 is an STM32H743ZIT6, and the CPU control circuit also includes a data storage chip U2.
3. The intelligent fire safety gateway circuit according to claim 1, characterized in that, The system power supply circuit includes a 485 communication circuit, a 485 communication external interface J3, and a power supply circuit.
4. The intelligent fire safety gateway circuit according to claim 3, characterized in that, The 485 communication circuit includes a 485 communication chip U5. Pin 1 of the 485 communication chip U5 is connected to pin 102 of the microcontroller U1. Pins 2 and 3 of the 485 communication chip U5 are connected to one end of resistor R306 and pin 100 of the microcontroller U1. The other end of resistor R306 is connected to a 3.3V power supply. Pin 4 of the 485 communication chip U5 is connected to pin 101 of the microcontroller U1. Pin 8 of the 485 communication chip U5 is connected to a 3.3V power supply and one end of resistor R201. The other end of resistor R201 is connected to a resistor... One end of resistor R105 is connected to one end of fuse F105. The other end of resistor R105 is connected to pin 6 of the 485 communication chip U5. The other end of fuse F105 is connected to the 485 communication external interface J3. Pin 7 of the 485 communication chip U5 is connected to one end of resistor R106. The other end of resistor R106 is connected to one end of resistor R202 and one end of fuse F106. The other end of resistor R202 and pin 5 of the 485 communication chip U5 are both grounded. The other end of fuse F106 is connected to the 485 communication external interface J3.
5. The intelligent fire safety gateway circuit according to claim 3, characterized in that, The power supply circuit includes a buck converter U3. Pin 2 of the buck converter U3 is connected to the cathode of diode D1 and one end of capacitor E9. The anode of diode D1 receives DC 24V. Pin 8 of the buck converter U3 is connected to one end of capacitor C112. Pin 6 of the buck converter U3 is connected to one end of capacitor C17. The other end of capacitor C17 is connected to one end of resistor R23. Pin 1 of the buck converter U3 is connected to one end of resistor R19. The other end of resistor R19 is connected to one end of capacitor C19. The other end of capacitor C19 is connected to one end of inductor L1 and diode D2. The cathode of the diode is connected to pin 3 of the buck converter U3. The other end of the inductor L1 outputs a 3.3V power supply and is connected to one end of capacitor E10, one end of capacitor E11, and one end of resistor R20. The other end of resistor R20 is connected to one end of resistor R21 and pin 5 of the buck converter U3. The other end of resistor R21 is connected to one end of resistor R22. The other ends of capacitor E9, capacitor C112, pin 4 of buck converter U3, resistor R23, the anode of diode D2, resistor R22, capacitor E10, and capacitor E11 are all grounded.