A dedicated line direct control output circuit for fire alarm controller

Abstract

The present invention relates to the technical field of fire alarms, in particular to a dedicated line direct control output circuit of a fire alarm controller, which can realize instant response and linkage control, and can also manually and directly start fire-fighting equipment, thereby improving fire-fighting efficiency, reducing casualties and property losses, and enhancing system reliability. The circuit comprises a CPU circuit, a power supply circuit, a sound alarm circuit, an indicator light circuit, a CPU fault detection circuit, a dedicated line unit, and a key circuit unit. The CPU circuit comprises a single-chip microcomputer U1 of model STM32G030C8T6.

Description

Technical Field

[0001] The invention relates to the technical field of fire alarms, in particular to a dedicated line direct control output circuit of a fire alarm controller. Background Art

[0002] The fire alarm system is one of the indispensable safety facilities in modern buildings, among which the dedicated line direct control output circuit is the key part to ensure that the system can respond quickly and start the relevant fire-fighting equipment. In practical applications, the dedicated line direct control output circuit is widely used in fire alarm systems in various building sites. For example, in large shopping malls, high-rise buildings, data centers and other places, the fire alarm system is usually equipped with a dedicated line direct control output circuit to ensure that the relevant fire-fighting equipment can be quickly started to extinguish the fire and exhaust the smoke when a fire occurs. The dedicated line direct control output circuit plays a vital role in the fire alarm system. Therefore, when designing and installing the fire alarm system, the configuration and performance requirements of the dedicated line direct control output circuit should be fully considered. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a dedicated line direct control output circuit of a fire alarm controller, which can achieve instant response and linkage control, and can also manually start fire-fighting equipment directly, thereby improving fire-fighting efficiency, reducing casualties and property losses, and enhancing system reliability.

[0004] The technical scheme is as follows: a dedicated line direct control output circuit of a fire alarm controller, which includes a CPU circuit, a power supply circuit, a sound alarm circuit, an indicator light circuit, a CPU fault detection circuit, a dedicated line unit, and a key circuit unit. The CPU circuit includes a single-chip microcomputer U1 of model STM32G030C8T6, and the CPU fault detection circuit includes a resistor R506 and a capacitor C1 connected to the 40-pin of the single-chip microcomputer U1. The other end of the resistor R506 is connected to one end of the resistor R1 and VCC, and the other end of the capacitor C1 is connected to one end of the resistor R2, the cathode of the switching diode D14, and the input end of the inverter U9D. The anode of the switching diode D14 and the resistor R 2 and the other end are both grounded, the output end of the inverter U9D is connected to the cathode of the diode D15, the anode of the diode D15 is connected to one end of the capacitor C2, the input end of the inverter U9A, and the other end of the resistor R1, the other end of the capacitor C2 is grounded, the output end of the inverter U9A is connected to the input end of the inverter U9B, the output end of the inverter U9B is connected to one end of the resistor R106, the other end is connected to one end of the indicator light D106, and the other end of the indicator light is grounded; the key circuit unit includes five identical key circuits, one of which includes a switch diode D1, one anode of the switch diode D1 is connected to the 30th pin of the single-chip computer U1, and the other anode is connected to the lighted key K G1, another input end of the button with light KG1 is connected to the dedicated line unit, the cathode of the switching diode D1 is connected to the indicator light input end of the button with light KG1, the indicator light output end of the button with light KG1 is grounded, one output end of the button with light KG1 is connected to VDD, and the other output end is connected to the anode of the switching diode D2, and the cathode of the switching diode D2 is grounded; the dedicated line unit includes a bus transceiver U2, a latch U3, a driving chip U4, a reference judgment interface circuit, and a five-way adjustment interface circuit, the reference judgment interface circuit includes a resistor R161 and a resistor R162, one end of the resistor R161 is connected to One end of the resistor R162 is connected to the pin 11 of the single-chip microcomputer U1, and the other end of the resistor R161 is grounded. The other end of the resistor R162 is connected to the pin 1 of the interface J2. One of the adjustment interface circuits includes a resistor R601 whose one end is connected to the pin 10 of the driver chip U4, and the other end of the resistor R601 is connected to one end of the resistor R501 and the pin 3 of the common-mode inductor L101. The pins 1, 2, and 4 of the common-mode inductor L101 are respectively connected to the pins 1, 3, and 4 of the interface J2. The other end of the resistor R501 is connected to one end of the resistor R301, one end of the capacitor C105, and the pin 20 of the single-chip microcomputer U1. The other ends of the resistor R301 and the other end of the capacitor C105 are both grounded.The sound alarm circuit includes a voice chip U5, wherein pin 1 of the voice chip U5 is connected to one end of a resistor R109, the other end of the resistor R109 is connected to the base of a transistor Q2, the emitter of the transistor Q2 is grounded, and the collector is connected to one end of a speaker SP1, the other end of the speaker SP1 is connected to VCC via a resistor R11 and a resistor R12 connected in parallel, pin 5 of the voice chip U5 is connected to one end of a resistor R41, the other end of the resistor R41 is connected to pin 6 of the voice chip U5, pin 2 of the voice chip U5 is connected to pin 3 of a switching diode D13, and pin 1 of the switching diode D13 is connected to resistor R1 07 one end and the 38th pin of the single chip U1, the 2nd pin of the switch diode D13 is connected to the 3rd pin of the switch diode D11, one end of the resistor R108, and the 39th pin of the single chip U1, the other end of the resistor R107 is connected to the 1st and 2nd pins of the switch diode D12, the 1st and 2nd pins of the switch diode D11 are connected and connected to the 3rd pin of the switch diode D12 and the 3rd pin of the voice chip U5, and the other end of the resistor R108 is grounded; the indicator light circuit includes a working indicator light D101, a fault indicator light D102, a start indicator light D103, a feedback indicator light D104, and an automatic indicator light D105. ;

[0005] After adopting the present invention, the CPU fault detection circuit can be used to detect whether the CPU is working normally. If the CPU crashes, it may have a negative impact on the overall operation of the fire alarm system. The key circuit unit can be used to control the dedicated line unit, which can not only realize the linkage control with the main control unit, but also manually start the fire-fighting equipment directly, thereby improving the fire-fighting efficiency, reducing casualties and property losses, and enhancing the reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 This is the CPU circuit schematic; Figure 2 This is the schematic diagram of the power supply circuit; Figure 3 This is the schematic diagram of the sound alarm circuit; Figure 4 It is the schematic diagram of the indicator light circuit; Figure 5 This is the schematic diagram of the CPU fault detection circuit; Figure 6 It is the circuit schematic diagram of the key circuit unit; Figure 7 This is the circuit schematic diagram of the dedicated line unit. DETAILED DESCRIPTION

[0007] See Figures 1 to 7As shown, a dedicated line direct control output circuit of a fire alarm controller includes a CPU circuit, a power supply circuit, a sound alarm circuit, an indicator light circuit, a CPU fault detection circuit, a dedicated line unit, and a key circuit unit.

[0008] The CPU circuit includes a single-chip microcomputer U1 of model STM32G030C8T6, which is used for controlling the entire circuit.

[0009] The CPU fault detection circuit includes a resistor R506 and a capacitor C1 connected to pin 40 of the single-chip computer U1, the other end of the resistor R506 is connected to one end of the resistor R1 and VCC, the other end of the capacitor C1 is connected to one end of the resistor R2, the cathode of the switching diode D14, and the input end of the inverter U9D, the anode of the switching diode D14 and the other end of the resistor R2 are both grounded, the output end of the inverter U9D is connected to the cathode of the diode D15, the anode of the diode D15 is connected to one end of the capacitor C2, the input end of the inverter U9A, and the other end of the resistor R1, the other end of the capacitor C2 is grounded, the output end of the inverter U9A is connected to the input end of the inverter U9B, the output end of the inverter U9B is connected to one end of the resistor R106, the other end is connected to one end of the indicator light D106, and the other end of the indicator light D106 is grounded, which is used to detect whether the CPU circuit is working normally. When a fault occurs, the indicator light D106 lights up.

[0010] The sound alarm circuit includes a voice chip U5, wherein pin 1 of the voice chip U5 is connected to one end of a resistor R109, the other end of the resistor R109 is connected to the base of a transistor Q2, the emitter of the transistor Q2 is grounded, and the collector is connected to one end of a speaker SP1, the other end of the speaker SP1 is connected to VCC via a resistor R11 and a resistor R12 connected in parallel, pin 5 of the voice chip U5 is connected to one end of a resistor R41, the other end of the resistor R41 is connected to pin 6 of the voice chip U5, pin 2 of the voice chip U5 is connected to pin 3 of a switching diode D13, and pin 1 of the switching diode D13 is connected to resistor R10 7 and pin 38 of the single-chip microcomputer U1, pin 2 of the switching diode D13 is connected to pin 3 of the switching diode D11, one end of the resistor R108, and pin 39 of the single-chip microcomputer U1, the other end of the resistor R107 is connected to pins 1 and 2 of the switching diode D12, pins 1 and 2 of the switching diode D11 are connected and connected to pin 3 of the switching diode D12 and pin 3 of the voice chip U5, and the other end of the resistor R108 is grounded; the indicator light circuit includes a working indicator light D101, a fault indicator light D102, a start indicator light D103, a feedback indicator light D104, and an automatic indicator light D105.

[0011] The power supply circuit includes a 24C to 5V (VCC) circuit and a DC5V to VC3.3V circuit to ensure normal power supply to the system.

[0012] The key circuit unit includes five identical key circuits, one of which includes a switching diode D1, an anode of the switching diode D1 is connected to pin 30 of the single-chip computer U1, and another anode is connected to an input end of a key with a light KG1, and another input end of the key with a light KG1 is connected to the dedicated line unit, a cathode of the switching diode D1 is connected to the input end of the indicator light of the key with a light KG1, an output end of the indicator light of the key with a light KG1 is grounded, an output end of the key with a light KG1 is connected to VDD, and the other output end is connected to the anode of the switching diode D2, and the cathode of the switching diode D2 is grounded; the dedicated line unit includes a bus transceiver U2, a latch U3, a driver chip U4, a reference judgment interface circuit, and five-way adjustment interfaces. The reference judgment interface circuit includes a resistor R161 and a resistor R162, one end of the resistor R161 is connected to one end of the resistor R162 and the 11th pin of the single-chip computer U1, the other end of the resistor R161 is grounded, and the other end of the resistor R162 is connected to the 1st pin of the interface J2. One adjustment interface circuit includes a resistor R601 having one end connected to the 10th pin of the driving chip U4, the other end of the resistor R601 is connected to one end of the resistor R501 and the 3rd pin of the common-mode inductor L101, the 1st pin, the 2nd pin and the 4th pin of the common-mode inductor L101 are respectively connected to the 1st pin, the 3rd pin and the 4th pin of the interface J2, the other end of the resistor R501 is connected to one end of the resistor R301, one end of the capacitor C105 and the 20th pin of the single-chip computer U1, and the other end of the resistor R301 and the other end of the capacitor C105 are both grounded.

[0013] Under normal circumstances, the single-chip microcomputer U1 controls the operation of the driver chip U3 through the bus transceiver U2 and the latch U3; when the single-chip microcomputer U1 freezes, etc., the button start method can be used. KG1, KG2, KG3, KG4, and KG5 are 5 buttons with lights. In the case of CPU failure, the button start is still valid. JV1, JV2, JV3, JV4, and JV5 are real-time voltage monitoring ports on the 5 dedicated line interface lines. The data converted from analog to digital is used to determine the status of the dedicated line (normal, fault, start, feedback, start feedback); JV0 is used to determine the size of the DC+ reference voltage, and then JV1, JV2, JV3, JV4, and JV5 use the value of JV0 as a reference to adjust the dedicated line status judgment conditions. In order to prevent external interference signals from causing abnormal situations such as false startup of the dedicated line, five common-mode inductors L101, L102, L103, L104, and L105 are added to the dedicated line interface. The main function is to improve the anti-interference ability of the dedicated line and improve the stability of the line.

Claims

1. A dedicated line direct control output circuit of a fire alarm controller, comprising a CPU circuit, a power supply circuit, a sound alarm circuit, an indicator light circuit, a CPU fault detection circuit, a dedicated line unit, and a key circuit unit. The CPU circuit comprises a single-chip microcomputer U1 of model STM32G030C8T6, and the CPU fault detection circuit comprises a resistor R506 and a capacitor C1 connected to the 40-pin of the single-chip microcomputer U1, the other end of the resistor R506 is connected to one end of the resistor R1 and VCC, the other end of the capacitor C1 is connected to one end of the resistor R2, the cathode of the switching diode D14, and the input end of the inverter U9D, and the anode of the switching diode D14 and the other end of the resistor R2 are both connected to The output end of the inverter U9D is connected to the cathode of the diode D15, the anode of the diode D15 is connected to one end of the capacitor C2, the input end of the inverter U9A, and the other end of the resistor R1, the other end of the capacitor C2 is grounded, the output end of the inverter U9A is connected to the input end of the inverter U9B, the output end of the inverter U9B is connected to one end of the resistor R106, the other end is connected to one end of the indicator light D106, and the other end of the indicator light is grounded; the key circuit unit includes five identical key circuits, one of which includes a switching diode D1, one anode of the switching diode D1 is connected to the 30th pin of the single-chip microcomputer U1, and the other anode is connected to the button of the lighted key KG1 The dedicated line unit comprises a bus transceiver U2, a latch U3, a driver chip U4, a reference judgment interface circuit, and a five-way adjustment interface circuit. The reference judgment interface circuit comprises a resistor R161 and a resistor R162. One end of the resistor R161 is connected to the input end of the indicator light input end of the illuminated key KG1. The indicator light output end of the illuminated key KG1 is grounded. One output end of the illuminated key KG1 is connected to VDD, and the other output end is connected to the anode of the switch diode D2. The cathode of the switch diode D2 is grounded. The dedicated line unit comprises a bus transceiver U2, a latch U3, a driver chip U4, a reference judgment interface circuit, and a five-way adjustment interface circuit. The reference judgment interface circuit comprises a resistor R161 and a resistor R162. One end of the resistor R161 is connected to the One end of the resistor R162 is connected to the 11th pin of the single-chip microcomputer U1, and the other end of the resistor R161 is grounded. The other end of the resistor R162 is connected to the 1st pin of the interface J2. One of the adjustment interface circuits includes a resistor R601 having one end connected to the 10th pin of the driver chip U4, and the other end of the resistor R601 is connected to one end of the resistor R501 and the 3rd pin of the common-mode inductor L101. The 1st, 2nd and 4th pins of the common-mode inductor L101 are respectively connected to the 1st, 3rd and 4th pins of the interface J2. The other end of the resistor R501 is connected to one end of the resistor R301, one end of the capacitor C105 and the 20th pin of the single-chip microcomputer U1. The other end of the resistor R301 and the other end of the capacitor C105 are both grounded.The sound alarm circuit includes a voice chip U5, wherein pin 1 of the voice chip U5 is connected to one end of a resistor R109, the other end of the resistor R109 is connected to the base of a transistor Q2, the emitter of the transistor Q2 is grounded, and the collector is connected to one end of a speaker SP1, the other end of the speaker SP1 is connected to VCC via a resistor R11 and a resistor R12 connected in parallel, pin 5 of the voice chip U5 is connected to one end of a resistor R41, the other end of the resistor R41 is connected to pin 6 of the voice chip U5, pin 2 of the voice chip U5 is connected to pin 3 of a switching diode D13, and pin 1 of the switching diode D13 is connected to resistor R1 07 one end and the 38th pin of the single chip U1, the 2nd pin of the switch diode D13 is connected to the 3rd pin of the switch diode D11, one end of the resistor R108, and the 39th pin of the single chip U1, the other end of the resistor R107 is connected to the 1st and 2nd pins of the switch diode D12, the 1st and 2nd pins of the switch diode D11 are connected and connected to the 3rd pin of the switch diode D12 and the 3rd pin of the voice chip U5, and the other end of the resistor R108 is grounded; the indicator light circuit includes a working indicator light D101, a fault indicator light D102, a start indicator light D103, a feedback indicator light D104, and an automatic indicator light D105. ;

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