Flame alarm circuit and device

Abstract

The utility model is suitable for the technical field of sensors, and provides a flame alarm circuit and device, and the circuit comprises a voltage conversion module, a flame judgment module, a main control module, a wired input module, a wireless input module, and a signal output module. The voltage conversion module is used for providing working voltage for the flame alarm circuit; the flame judgment module is used for generating a flame induction signal and a comparison signal to detect and judge flame, generating a flame determination signal and transmitting the flame determination signal to the main control module; the main control module is used for receiving a flame determination signal, a wired signal and a wireless signal and outputting a control signal; the wired input module is used for transmitting a wired signal to the main control module; the wireless input module is used for transmitting a wireless signal to the main control module; and the signal output module is used for being connected with external equipment and outputting a control signal to the external equipment. The flame alarm circuit solves the problem of false alarm of the flame alarm circuit.

Description

Technical Field

[0001] This utility model belongs to the field of sensor technology, and in particular relates to a flame alarm circuit and device. Background Technology

[0002] A flame sensor is a device that detects the presence of a flame. It senses the light radiation of a specific wavelength produced by the flame and converts these light signals into electrical signals. Flame sensors are widely used in industrial and home safety fields to monitor the presence of flames to ensure safety and control the combustion process.

[0003] Current flame alarm circuits use flame sensors as detection devices. When the flame sensor generates a flame detection signal, the flame alarm circuit will trigger an alarm based on the flame detection signal.

[0004] In this way, the flame alarm circuit relies solely on the flame sensing signal from the flame sensor to determine whether an alarm is needed. If the flame sensor incorrectly identifies a flame, it will also generate a flame sensing signal, causing the flame alarm circuit to alarm, resulting in a false alarm problem. Utility Model Content

[0005] The purpose of this utility model embodiment is to provide a flame alarm circuit, which aims to solve the problem of false alarms in flame alarm circuits.

[0006] This utility model embodiment is implemented as follows: a flame alarm circuit, the flame alarm circuit including: a voltage conversion module, a flame detection module, a main control module, a wired input module, a wireless input module, and a signal output module;

[0007] The voltage conversion module is connected to the flame detection module and the main control module respectively, and is used to provide operating voltage for the flame alarm circuit;

[0008] The flame detection module is used to generate flame sensing signals and comparison signals to detect flames and make flame judgments. It generates a flame determination signal based on the flame sensing signals and comparison signals and transmits it to the main control module.

[0009] The main control module is connected to modules other than the main control module, and is used to receive flame determination signals, wired signals and wireless signals, and output control signals;

[0010] The wired input module is connected to the wired detector and is used to transmit wired signals to the main control module;

[0011] The wireless input module is connected to the wireless detector and is used to transmit wireless signals to the main control module;

[0012] The signal output module is used to connect to external devices and output control signals to the external devices.

[0013] Preferably, the voltage conversion module includes: a power input terminal J1, a diode D1, a chip U2, a chip U4, an inductor L1, a resistor R9, a resistor R10, a resistor R11, and a capacitor C10;

[0014] The power input terminal J1 has its 2nd interface connected to the ground wire and its 3rd interface connected to the positive terminal of the diode D1.

[0015] The negative terminal of diode D1 is connected to the IN interface of chip U2;

[0016] The EN interface of chip U2 is connected to the negative terminal of diode D1 through resistor R9; the SW interface is connected to the VIN interface of chip U4 through inductor L1; the FB interface is connected to ground through resistor R10 and to the VIN interface of chip U4 through resistor R11; the GND interface is connected to ground; and the BS interface is connected to the SW interface through capacitor C10.

[0017] The GND interface of the chip U4 is connected to the ground wire.

[0018] Preferably, the flame detection module includes: a flame sensor S1, a sunlight sensor S2, a chip U3, and a sensor output terminal J12;

[0019] The flame sensor S1 has interface 1 connected to ground, interface 2 connected to interface PA1 of chip U3, interface 3 connected to interface OUT of chip U4, and interface 4 connected to interface PA0-WKUP of chip U3.

[0020] The sunlight sensor S2 has interface 1 connected to ground, interface 2 connected to interface PA5 of chip U3, interface 3 connected to interface OUT of chip U4, and interface 4 connected to interface PA4 of chip U3.

[0021] The PA6 interface of the chip U3 is connected to the 2 interface of the sensor output terminal J12;

[0022] The sensor output terminal J12 has its 1st interface connected to the OUT interface of the chip U4, and its 3rd interface connected to the ground wire.

[0023] Preferably, the main control module includes: chip U1, sensor input terminal J6, indicator light LED1, switch S3, transistor Q1, buzzer LS1, resistor R7, resistor R2 and resistor R1;

[0024] The VDDA interface of chip U1 is connected to the OUT interface of chip U4, the VSSA interface is connected to the ground wire, the PD2 interface is connected to the 2 interface of sensor input terminal J6, the PA0 interface is connected to the positive terminal of indicator LED1 through the resistor R7, the PA1 interface is connected to the ground wire through the switch S3, and the PC10 interface is connected to the B terminal of transistor Q1 through the resistor R2.

[0025] The sensor input terminal J6 has interface 1 connected to ground, interface 2 connected to interface 2 of the sensor output terminal J12, and interface 3 connected to the OUT interface of the chip U4.

[0026] The negative terminal of the indicator LED1 is connected to the ground wire;

[0027] The emitter (E) of transistor Q1 is connected to ground, and the collector (C) is connected to the negative terminal of buzzer LS1 through resistor R1.

[0028] The positive terminal of the buzzer LS1 is connected to the OUT interface of the chip U4.

[0029] Preferably, the wired input module includes: a wired input terminal J13, a fuse F2, a diode D2, a diode D5, a diode D6, a resistor R26, and a resistor R25;

[0030] The wired input terminal J13 has its interface 1 connected to the negative terminal of diode D5, its interface 2 connected to the negative terminal of diode D6, and its interface 3 connected to ground.

[0031] The positive terminal of diode D5 is connected to the PB2 interface of chip U1, and the negative terminal is connected to the negative terminal of diode D2 through resistor R26.

[0032] The positive terminal of diode D6 is connected to the PB1 interface of chip U1, and the negative terminal is connected to the negative terminal of diode D2 through resistor R25.

[0033] The positive terminal of diode D2 is connected to the negative terminal of diode D1 through fuse F2.

[0034] Preferably, the wireless input module includes: an antenna terminal J11 and a communication terminal J7;

[0035] The antenna terminal J11 has interface 1 connected to the communication terminal J7, and interfaces 2 and 3 are connected to the ground wire.

[0036] The 5th interface of the communication terminal J7 is connected to the OUT interface of the chip U4, the 4th interface is connected to the PC11 interface of the chip U1, and the 3rd and 2nd interfaces are connected to the ground wire.

[0037] Preferably, the signal output module includes: a serial port output module and a voltage output module;

[0038] The serial port output module is used to connect to an external device that supports serial ports and output serial port control signals to the external device that supports serial ports.

[0039] The voltage output module is used to connect to external devices that do not support serial ports and to output voltage control signals to external devices that do not support serial ports.

[0040] Preferably, the serial port output module includes: a first serial port terminal J8, a second serial port terminal J10, and a third serial port terminal J14;

[0041] The 3rd interface of the first serial port terminal J8 is connected to the ground wire, the 2nd interface is connected to the PA10 interface of the chip U1, and the 1st interface is connected to the PA9 interface of the chip U1.

[0042] The second serial port terminal J10 has interface 1 connected to interface PB11 of chip U1, interface 2 connected to interface PB10 of chip U1, and interface 3 connected to ground.

[0043] The third serial port terminal J14 has the following interfaces: interface 1 is connected to the OUT interface of the chip U4, interface 2 is connected to the ground wire, interface 3 is connected to the PA2 interface of the chip U1, interface 4 is connected to the PA3 interface of the chip U1, interface 5 is connected to the PB14 of the chip U1, and interface 6 is connected to the PB13 of the chip U1.

[0044] Preferably, the voltage output module includes: transistor Q2, transistor Q5, fuse F1, voltage output terminal J15, MOSFET Q7, MOSFET Q8, resistor R15, resistor R16, resistor R30 and resistor R31;

[0045] The base (B) of transistor Q2 is connected to the PC4 interface of chip U1 through resistor R15, the emitter (E) is connected to ground, and the collector (C) is connected to the base (B) of transistor Q5 through resistor R16.

[0046] The emitter (E) of transistor Q5 is connected to the cathode of diode D1 via fuse F1, and the collector (C) is connected to the 5th terminal of voltage output terminal J15.

[0047] The gate (G) of the MOSFET Q7 is connected to the PA5 interface of the chip U1 through the resistor R30, the source (S) is connected to the ground line, and the drain (D) is connected to the 3 interface of the voltage output terminal J15.

[0048] The gate (G) of the MOSFET Q8 is connected to the PA7 interface of the chip U1 through the resistor R31, the source (S) is connected to the ground line, and the drain (D) is connected to the 2 interface of the voltage output terminal J15.

[0049] The voltage output terminal J15 has its 4-pin connector connected to ground.

[0050] Another objective of this utility model is to provide a flame alarm device, which includes: a power supply component, a detection component, a sensing component, and a functional component;

[0051] The power supply component is connected to the detection component and is used to provide power to the detection component;

[0052] The detection component is connected to the detection component and is used to generate wired and wireless signals;

[0053] The detection component includes a flame alarm circuit as described above;

[0054] The functional component is connected to the detection component and is used to implement alarm or display functions according to control signals.

[0055] This embodiment of the invention provides a flame alarm circuit that uses a flame detection module to generate a flame sensing signal and a comparison signal to detect and determine a flame. If a flame is detected, a flame confirmation signal is generated and transmitted to the main control module. Simultaneously, a wired input module receives the wired signal from a wired detector and transmits it to the main control module, and a wireless input module receives the wireless signal from a wireless detector and transmits it to the main control module. The main control module generates a control signal based on the flame confirmation signal, the wired signal, and the wireless signal, and outputs the control signal to external devices through a signal output module. This approach not only relies on the flame sensing signal generated by the flame sensor but also uses the comparison signal to determine the flame, reducing the possibility of the flame sensor misidentifying a flame. Furthermore, the wired and wireless signals also reduce the likelihood of the flame sensor misidentifying a flame, thus solving the problem of false alarms in flame alarm circuits. Attached Figure Description

[0056] Figure 1 A structural diagram of a flame alarm circuit provided in an embodiment of this utility model;

[0057] Figure 2 A circuit diagram of a voltage conversion module provided for an embodiment of this utility model;

[0058] Figure 3 A circuit diagram of the flame detection module provided in this embodiment of the utility model;

[0059] Figure 4 Circuit diagrams of the main control module and wireless input module provided for embodiments of this utility model;

[0060] Figure 5 Circuit diagrams of the battery charging module, main power voltage detection module, and battery voltage detection module provided for embodiments of this utility model;

[0061] Figure 6 A circuit diagram of a wired input module provided for an embodiment of this utility model;

[0062] Figure 7 The circuit diagram of the voltage output module in the signal output module provided in the embodiment of this utility model. Detailed Implementation

[0063] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0064] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0065] like Figure 1 The diagram shown is a structural diagram of a flame alarm circuit provided in an embodiment of the present invention, including: a voltage conversion module, a flame detection module, a main control module, a wired input module, a wireless input module, and a signal output module;

[0066] The voltage conversion module is connected to the flame detection module and the main control module respectively, and is used to provide operating voltage for the flame alarm circuit;

[0067] The flame detection module is used to generate flame sensing signals and comparison signals to detect flames and make flame judgments. It generates a flame determination signal based on the flame sensing signals and comparison signals and transmits it to the main control module.

[0068] The main control module is connected to modules other than the main control module, and is used to receive flame determination signals, wired signals and wireless signals, and output control signals;

[0069] The wired input module is connected to the wired detector and is used to transmit wired signals to the main control module;

[0070] The wireless input module is connected to the wireless detector and is used to transmit wireless signals to the main control module;

[0071] The signal output module is used to connect to external devices and output control signals to the external devices.

[0072] In this embodiment of the invention, the voltage conversion module can output multiple voltages of different specifications to adapt to the operating voltage required by different devices, such as 12V, 5V, 3.3V, etc.

[0073] In this embodiment of the invention, the flame detection module itself can complete the judgment of the flame sensing signal. When the flame detection module outputs a flame confirmation signal, it means that the flame detection module has confirmed that the flame has been identified.

[0074] In this embodiment of the invention, the main control module generates a control signal based on the flame determination signal, the wired signal, and the wireless signal. There are several ways to achieve this. For example, the flame determination signal, the wired signal, and the wireless signal can be set to a high level. When the interface connecting the main control module to the flame determination module is at a high level, it indicates that the flame determination signal has been received; when the interface is at a low level, it indicates that the flame determination signal has not been received. The same applies to the wired and wireless signals. When the corresponding interfaces of the main control module are all at a high level, a control signal is output. The control signal can be a high level, a low level, or serial port data, etc. Alternatively, the flame determination signal, the wired signal, and the wireless signal can be set to a low level, with the logic reversed compared to a high level.

[0075] In this embodiment of the invention, the wired signal is generated by a wired detector, and the wired input module is only responsible for transmitting the wired signal. The wired signal may not be used as the basis for generating the control signal, depending on whether the wired detector is connected to the wired input module. Of course, the wired signal can also be used independently as the basis for generating the control signal. The same applies to the wireless signal.

[0076] In this embodiment of the invention, the control signal can be generated based on the flame determination signal, the wired signal, and the wireless signal, or it can be generated based on any two or one of them.

[0077] In this embodiment of the invention, the wired and wireless detectors differ only in their communication methods; both are essentially detectors. The detector can be a smoke detector or other flame-assisted identification device.

[0078] In this embodiment of the utility model, there are various external devices, such as cameras, sirens, and sound and light alarms.

[0079] This embodiment of the invention provides a flame alarm circuit that uses a flame detection module to generate a flame sensing signal and a comparison signal to detect and determine a flame. If a flame is detected, a flame confirmation signal is generated and transmitted to the main control module. Simultaneously, a wired input module receives the wired signal from a wired detector and transmits it to the main control module, and a wireless input module receives the wireless signal from a wireless detector and transmits it to the main control module. The main control module generates a control signal based on the flame confirmation signal, the wired signal, and the wireless signal, and outputs the control signal to external devices through a signal output module. This approach not only relies on the flame sensing signal generated by the flame sensor but also uses the comparison signal to determine the flame, reducing the possibility of the flame sensor misidentifying a flame. Furthermore, the wired and wireless signals also reduce the likelihood of the flame sensor misidentifying a flame, thus solving the problem of false alarms in flame alarm circuits.

[0080] like Figure 2 As shown, in a preferred embodiment of the present invention, the voltage conversion module includes: power input terminal J1, diode D1, chip U2, chip U4, inductor L1, resistor R9, resistor R10, resistor R11 and capacitor C10.

[0081] The power input terminal J1 has its 2nd interface connected to the ground wire and its 3rd interface connected to the positive terminal of the diode D1.

[0082] The negative terminal of diode D1 is connected to the IN interface of chip U2;

[0083] The EN interface of chip U2 is connected to the negative terminal of diode D1 through resistor R9; the SW interface is connected to the VIN interface of chip U4 through inductor L1; the FB interface is connected to ground through resistor R10 and to the VIN interface of chip U4 through resistor R11; the GND interface is connected to ground; and the BS interface is connected to the SW interface through capacitor C10.

[0084] The GND interface of the chip U4 is connected to the ground wire.

[0085] In this embodiment of the invention, the power input terminal J1 is connected to a voltage device capable of outputting voltage. Specifically, interface 3 of the power input terminal J1 is connected to the positive terminal of the voltage device, such as a voltage device that provides 12V DC voltage. In this case, interface 3 of the power input terminal J1 outputs 12V DC voltage. The voltage device can be a battery, a voltage output meter, etc. Interface 1 of the power input terminal J1 is connected to the charging terminal of the battery.

[0086] In this embodiment of the utility model, chip U2 and chip U4 are voltage conversion chips, which are used to convert the voltage output by the voltage device into the working voltage required by other modules, such as converting 12V to 5V and 5V to 3.3V.

[0087] In this embodiment of the invention, resistors R11 and R10 form a voltage regulation circuit.

[0088] In this embodiment of the utility model, the voltage conversion module further includes a first terminal J2 and a second terminal J3; the first terminal J2 and the second terminal J3 are reserved voltage output interfaces that can provide voltage to other PCB boards.

[0089] In this embodiment of the invention, the voltage conversion module also includes other capacitors, resistors, and protection diodes required to form the circuit.

[0090] like Figure 3 As shown, in a preferred embodiment of the present invention, the flame detection module includes: a flame sensor S1, a sunlight sensor S2, a chip U3, and a sensor output terminal J12;

[0091] The flame sensor S1 has interface 1 connected to ground, interface 2 connected to interface PA1 of chip U3, interface 3 connected to interface OUT of chip U4, and interface 4 connected to interface PA0-WKUP of chip U3.

[0092] The sunlight sensor S2 has interface 1 connected to ground, interface 2 connected to interface PA5 of chip U3, interface 3 connected to interface OUT of chip U4, and interface 4 connected to interface PA4 of chip U3.

[0093] The PA6 interface of the chip U3 is connected to the 2 interface of the sensor output terminal J12;

[0094] The sensor output terminal J12 has its 1st interface connected to the OUT interface of the chip U4, and its 3rd interface connected to the ground wire.

[0095] In this embodiment of the invention, a flame sensor is used to detect flames and generate a flame sensing signal, and a sunlight sensor is used to generate a comparison signal to judge the flame sensing signal generated by the flame sensor. Data from the flame sensor and the sunlight sensor are transmitted to chip U3 via serial communication. Therefore, the PA0-WKUP and PA1 interfaces of chip U3 have serial communication functionality, and the same applies to PA4 and PA5 of chip U1.

[0096] In this embodiment of the invention, since the flame determination signal is a voltage signal, the PA6 interface of chip U3 can be an interface with IO function.

[0097] In this embodiment of the invention, chip U3 may be a chip from the GD32F103 series.

[0098] In this embodiment of the invention, the flame detection module also includes capacitors, resistors, crystal oscillators, and program programming interfaces required for other circuit components, as well as chip U3.

[0099] like Figure 4 As shown, in a preferred embodiment of this utility model, the main control module includes: chip U1, sensor input terminal J6, indicator light LED1, switch S3, transistor Q1, buzzer LS1, resistor R7, resistor R2 and resistor R1;

[0100] The VDDA interface of chip U1 is connected to the OUT interface of chip U4, the VSSA interface is connected to the ground wire, the PD2 interface is connected to the 2 interface of sensor input terminal J6, the PA0 interface is connected to the positive terminal of indicator LED1 through the resistor R7, the PA1 interface is connected to the ground wire through the switch S3, and the PC10 interface is connected to the B terminal of transistor Q1 through the resistor R2.

[0101] The sensor input terminal J6 has interface 1 connected to ground, interface 2 connected to interface 2 of the sensor output terminal J12, and interface 3 connected to the OUT interface of the chip U4.

[0102] The negative terminal of the indicator LED1 is connected to the ground wire;

[0103] The emitter (E) of transistor Q1 is connected to ground, and the collector (C) is connected to the negative terminal of buzzer LS1 through resistor R1.

[0104] The positive terminal of the buzzer LS1 is connected to the OUT interface of the chip U4.

[0105] In this embodiment of the utility model, chip U1 can be a chip from the GD32F103 series.

[0106] In this embodiment of the invention, the PD2 interface of chip U1 is essentially connected to the PA6 interface of chip U3, and the PD2 interface of chip U1 is also an I / O interface. The main control module and the flame detection module are connected through the connection of the sensor output terminal J12 and the sensor input terminal J6. Therefore, multiple flame detection modules can be connected to the main control module simultaneously to perform flame detection at different locations.

[0107] In the embodiments of this utility model, such as Figure 5As shown, the flame alarm circuit also includes a battery charging module. The battery charging module includes transistors Q3 and Q6, diode D3, resistors R20, R22, and R24. The base (B) of transistor Q3 is connected to the PB12 interface of chip U1 through resistor R20, the emitter (E) is connected to ground, and the collector (C) is connected to the base (B) of transistor Q6 through resistor R22. The collector (C) of transistor Q6 is connected to the anode of diode D3, and the emitter (E) is connected to the cathode of diode D1 through resistor R24. The cathode of diode D3 is connected to interface 1 of the power input terminal J1. When the PB12 interface of chip U1 outputs a low level, transistors Q3 and Q6 are turned on, and interface 3 of power input terminal J1 outputs voltage to interface 1 of power input terminal J1 to complete battery charging.

[0108] In the embodiments of this utility model, such as Figure 5 As shown, the flame alarm circuit also includes a main power voltage detection module and a battery voltage detection module. The main power voltage detection module includes a transistor Q4, a diode D7, a resistor R4, and a resistor R18. The base (B) of transistor Q4 is connected to the anode of diode D1 through resistor R4, the emitter (E) is connected to ground, and the collector (C) is connected to the cathode of diode D1 through resistor R18. The cathode of diode D7 is connected to the collector (C) of transistor Q4, and the anode is connected to the PC6 interface of the chip. The main power voltage module monitors the input voltage at the power input terminal J1. The battery voltage detection module includes resistors R32 and R33. One end of resistor R32 is connected to the I interface of the power input terminal J1, and the other end is connected to the PC5 interface of the chip U1. One end of resistor R33 is connected to the PC5 interface of the chip U1, and the other end is connected to ground. The battery voltage detection module monitors the battery voltage.

[0109] In this embodiment of the present invention, the main control module also includes capacitors, resistors, and program burning interfaces required for other circuit components, as well as the program burning interface required for chip 1.

[0110] like Figure 6 As shown, in a preferred embodiment of the present invention, the wired input module includes: a wired input terminal J13, a fuse F2, a diode D2, a diode D5, a diode D6, a resistor R26, and a resistor R25;

[0111] The wired input terminal J13 has its interface 1 connected to the negative terminal of diode D5, its interface 2 connected to the negative terminal of diode D6, and its interface 3 connected to ground.

[0112] The positive terminal of diode D5 is connected to the PB2 interface of chip U1, and the negative terminal is connected to the negative terminal of diode D2 through resistor R26.

[0113] The positive terminal of diode D6 is connected to the PB1 interface of chip U1, and the negative terminal is connected to the negative terminal of diode D2 through resistor R25.

[0114] The positive terminal of diode D2 is connected to the negative terminal of diode D1 through fuse F2.

[0115] In this embodiment of the utility model, the wired input module has two wired inputs, with interface 1 of wired input terminal J13 being one input and interface 2 of wired input terminal J13 being the other input.

[0116] In this embodiment of the invention, multiple wired input modules can be provided.

[0117] In this embodiment of the invention, the wired input terminal J13 is connected to the wired detector so that the wired input module is connected to the wired detector.

[0118] like Figure 4 As shown, in a preferred embodiment of the present invention, the wireless input module includes: an antenna terminal J11 and a communication terminal J7;

[0119] The antenna terminal J11 has interface 1 connected to the communication terminal J7, and interfaces 2 and 3 are connected to the ground wire.

[0120] The 5th interface of the communication terminal J7 is connected to the OUT interface of the chip U4, the 4th interface is connected to the PC11 interface of the chip U1, and the 3rd and 2nd interfaces are connected to the ground wire.

[0121] In this embodiment of the invention, antenna terminal J11 is connected to an antenna, and communication terminal J7 is connected to a wireless data processing module. The wireless detector communicates wirelessly with the wireless data processing module connected to communication terminal J7. The wireless data processing module processes the data received through the antenna and transmits it to chip U1 through interface 4 of communication terminal J7.

[0122] In this embodiment of the invention, the wireless data processing module and chip U1 connected to the communication terminal J7 can communicate via the 433 / 315 communication protocol.

[0123] like Figure 1 As shown, in a preferred embodiment of this utility model, the signal output module includes: a serial port output module and a voltage output module;

[0124] The serial port output module is used to connect to an external device that supports serial ports and output serial port control signals to the external device that supports serial ports.

[0125] The voltage output module is used to connect to external devices that do not support serial ports and to output voltage control signals to external devices that do not support serial ports.

[0126] In this embodiment of the invention, there are various types of external devices that support serial ports, such as cameras. There are also various types of external devices that do not support serial ports, such as sirens and audible / visual alarms.

[0127] In this embodiment of the invention, the serial port control signal specifies serial data; the voltage control signal refers to a high level or a low level.

[0128] like Figure 4 As shown, in a preferred embodiment of the present invention, the serial port output module includes: a first serial port terminal J8, a second serial port terminal J10 and a third serial port terminal J14;

[0129] The 3rd interface of the first serial port terminal J8 is connected to the ground wire, the 2nd interface is connected to the PA10 interface of the chip U1, and the 1st interface is connected to the PA9 interface of the chip U1.

[0130] The second serial port terminal J10 has interface 1 connected to interface PB11 of chip U1, interface 2 connected to interface PB10 of chip U1, and interface 3 connected to ground.

[0131] The third serial port terminal J14 has the following interfaces: interface 1 is connected to the OUT interface of the chip U4, interface 2 is connected to the ground wire, interface 3 is connected to the PA2 interface of the chip U1, interface 4 is connected to the PA3 interface of the chip U1, interface 5 is connected to the PB14 of the chip U1, and interface 6 is connected to the PB13 of the chip U1.

[0132] In this embodiment of the invention, the first serial port terminal J8, the second serial port terminal J10, and the third serial port terminal J14 all need to be connected to an external device that supports serial ports to function. When an external device is connected to the first serial port terminal J8, the second serial port terminal J10, and the third serial port terminal J14, it can be considered as an external identification connected to the chip U1.

[0133] like Figure 7 As shown, in a preferred embodiment of the present invention, the voltage output module includes: transistor Q2, transistor Q5, fuse F1, voltage output terminal J15, MOSFET Q7, MOSFET Q8, resistor R15, resistor R16, resistor R30 and resistor R31.

[0134] The base (B) of transistor Q2 is connected to the PC4 interface of chip U1 through resistor R15, the emitter (E) is connected to ground, and the collector (C) is connected to the base (B) of transistor Q5 through resistor R16.

[0135] The emitter (E) of transistor Q5 is connected to the cathode of diode D1 via fuse F1, and the collector (C) is connected to the 5th terminal of voltage output terminal J15.

[0136] The gate (G) of the MOSFET Q7 is connected to the PA5 interface of the chip U1 through the resistor R30, the source (S) is connected to the ground line, and the drain (D) is connected to the 3 interface of the voltage output terminal J15.

[0137] The gate (G) of the MOSFET Q8 is connected to the PA7 interface of the chip U1 through the resistor R31, the source (S) is connected to the ground line, and the drain (D) is connected to the 2 interface of the voltage output terminal J15.

[0138] The voltage output terminal J15 has its 4-pin connector connected to ground.

[0139] In this embodiment of the invention, the circuit composed of transistors Q2 and Q5 is a driving circuit that can be connected to external devices such as sirens, and the voltage output terminal J15 outputs a high level at interface 5.

[0140] In this embodiment of the invention, the circuit composed of MOSFET Q7 and MOSFET Q8 is a two-way PGM control output circuit. The voltage output terminals J15, interfaces 2 and 3, each output a low level.

[0141] This utility model embodiment also provides a flame alarm device, including: a power supply component, a detection component, a detection component, and a functional component;

[0142] The power supply component is connected to the detection component and is used to provide power to the detection component;

[0143] The detection component is connected to the detection component and is used to generate wired and wireless signals;

[0144] The detection component includes a flame alarm circuit as described above;

[0145] The functional component is connected to the detection component and is used to implement alarm or display functions according to control signals.

[0146] In this embodiment of the invention, the power supply component may be a battery, a voltage output device, or other similar equipment.

[0147] In this embodiment of the invention, the detection component can be a wireless detector, a wired detector, or other similar devices.

[0148] In this embodiment of the utility model, the functional components can be devices such as cameras, sirens, and sound and light alarms.

[0149] This invention provides a flame alarm device that uses a flame detection module to generate a flame sensing signal and a comparison signal to detect and determine a flame. If a flame is detected, a flame confirmation signal is generated and transmitted to the main control module. Simultaneously, a wired input module receives the wired signal from a wired detector and transmits it to the main control module, and a wireless input module receives the wireless signal from a wireless detector and transmits it to the main control module. The main control module generates a control signal based on the flame confirmation signal, the wired signal, and the wireless signal, and outputs the control signal to external devices through a signal output module. This approach not only relies on the flame sensing signal generated by the flame sensor but also uses the comparison signal to determine the flame, reducing the possibility of the flame sensor misidentifying a flame. Furthermore, the wired and wireless signals also reduce the likelihood of the flame sensor misidentifying a flame, thus solving the problem of false alarms in flame alarm circuits.

[0150] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A flame alarm circuit, characterized in that, The flame alarm circuit includes: a voltage conversion module, a flame detection module, a main control module, a wired input module, a wireless input module, and a signal output module; The voltage conversion module is connected to the flame detection module and the main control module respectively, and is used to provide operating voltage for the flame alarm circuit; The flame detection module is used to generate flame sensing signals and comparison signals to detect flames and make flame judgments. It generates a flame determination signal based on the flame sensing signals and comparison signals and transmits it to the main control module. The main control module is connected to modules other than the main control module, and is used to receive flame determination signals, wired signals and wireless signals, and output control signals; The wired input module is connected to the wired detector and is used to transmit wired signals to the main control module; The wireless input module is connected to the wireless detector and is used to transmit wireless signals to the main control module; The signal output module is used to connect to external devices and output control signals to the external devices.

2. The flame alarm circuit according to claim 1, characterized in that, The voltage conversion module includes: power input terminal J1, diode D1, chip U2, chip U4, inductor L1, resistor R9, resistor R10, resistor R11 and capacitor C10; The power input terminal J1 has its 2nd interface connected to the ground wire and its 3rd interface connected to the positive terminal of the diode D1. The negative terminal of diode D1 is connected to the IN interface of chip U2; The EN interface of chip U2 is connected to the negative terminal of diode D1 through resistor R9; the SW interface is connected to the VIN interface of chip U4 through inductor L1; the FB interface is connected to ground through resistor R10 and to the VIN interface of chip U4 through resistor R11; the GND interface is connected to ground; and the BS interface is connected to the SW interface through capacitor C10. The GND interface of the chip U4 is connected to the ground wire.

3. The flame alarm circuit according to claim 2, characterized in that, The flame detection module includes: a flame sensor S1, a sunlight sensor S2, a chip U3, and a sensor output terminal J12; The flame sensor S1 has interface 1 connected to ground, interface 2 connected to interface PA1 of chip U3, interface 3 connected to interface OUT of chip U4, and interface 4 connected to interface PA0-WKUP of chip U3. The sunlight sensor S2 has interface 1 connected to ground, interface 2 connected to interface PA5 of chip U3, interface 3 connected to interface OUT of chip U4, and interface 4 connected to interface PA4 of chip U3. The PA6 interface of the chip U3 is connected to the 2 interface of the sensor output terminal J12; The sensor output terminal J12 has its 1st interface connected to the OUT interface of the chip U4, and its 3rd interface connected to the ground wire.

4. The flame alarm circuit according to claim 3, characterized in that, The main control module includes: chip U1, sensor input terminal J6, indicator LED1, switch S3, transistor Q1, buzzer LS1, resistor R7, resistor R2 and resistor R1; The VDDA interface of chip U1 is connected to the OUT interface of chip U4, the VSSA interface is connected to the ground wire, the PD2 interface is connected to the 2 interface of sensor input terminal J6, the PA0 interface is connected to the positive terminal of indicator LED1 through the resistor R7, the PA1 interface is connected to the ground wire through the switch S3, and the PC10 interface is connected to the B terminal of transistor Q1 through the resistor R2. The sensor input terminal J6 has interface 1 connected to ground, interface 2 connected to interface 2 of the sensor output terminal J12, and interface 3 connected to the OUT interface of the chip U4. The negative terminal of the indicator LED1 is connected to the ground wire; The emitter (E) of transistor Q1 is connected to ground, and the collector (C) is connected to the negative terminal of buzzer LS1 through resistor R1. The positive terminal of the buzzer LS1 is connected to the OUT interface of the chip U4.

5. The flame alarm circuit according to claim 4, characterized in that, The wired input module includes: wired input terminal J13, fuse F2, diode D2, diode D5, diode D6, resistor R26, and resistor R25; The wired input terminal J13 has its interface 1 connected to the negative terminal of diode D5, its interface 2 connected to the negative terminal of diode D6, and its interface 3 connected to ground. The positive terminal of diode D5 is connected to the PB2 interface of chip U1, and the negative terminal is connected to the negative terminal of diode D2 through resistor R26. The positive terminal of diode D6 is connected to the PB1 interface of chip U1, and the negative terminal is connected to the negative terminal of diode D2 through resistor R25. The positive terminal of diode D2 is connected to the negative terminal of diode D1 through fuse F2.

6. The flame alarm circuit according to claim 4, characterized in that, The wireless input module includes: an antenna terminal J11 and a communication terminal J7; The antenna terminal J11 has interface 1 connected to the communication terminal J7, and interfaces 2 and 3 are connected to the ground wire. The 5th interface of the communication terminal J7 is connected to the OUT interface of the chip U4, the 4th interface is connected to the PC11 interface of the chip U1, and the 3rd and 2nd interfaces are connected to the ground wire.

7. The flame alarm circuit according to claim 4, characterized in that, The signal output module includes: a serial port output module and a voltage output module; The serial port output module is used to connect to an external device that supports serial ports and output serial port control signals to the external device that supports serial ports. The voltage output module is used to connect to external devices that do not support serial ports and to output voltage control signals to external devices that do not support serial ports.

8. The flame alarm circuit according to claim 7, characterized in that, The serial port output module includes: a first serial port terminal J8, a second serial port terminal J10, and a third serial port terminal J14; The 3rd interface of the first serial port terminal J8 is connected to the ground wire, the 2nd interface is connected to the PA10 interface of the chip U1, and the 1st interface is connected to the PA9 interface of the chip U1. The second serial port terminal J10 has interface 1 connected to interface PB11 of chip U1, interface 2 connected to interface PB10 of chip U1, and interface 3 connected to ground. The third serial port terminal J14 has the following interfaces: interface 1 is connected to the OUT interface of the chip U4, interface 2 is connected to the ground wire, interface 3 is connected to the PA2 interface of the chip U1, interface 4 is connected to the PA3 interface of the chip U1, interface 5 is connected to the PB14 of the chip U1, and interface 6 is connected to the PB13 of the chip U1.

9. The flame alarm circuit according to claim 7, characterized in that, The voltage output module includes: transistor Q2, transistor Q5, fuse F1, voltage output terminal J15, MOSFET Q7, MOSFET Q8, resistor R15, resistor R16, resistor R30 and resistor R31; The base (B) of transistor Q2 is connected to the PC4 interface of chip U1 through resistor R15, the emitter (E) is connected to ground, and the collector (C) is connected to the base (B) of transistor Q5 through resistor R16. The emitter (E) of transistor Q5 is connected to the cathode of diode D1 via fuse F1, and the collector (C) is connected to the 5th terminal of voltage output terminal J15. The gate (G) of the MOSFET Q7 is connected to the PA5 interface of the chip U1 through the resistor R30, the source (S) is connected to the ground line, and the drain (D) is connected to the 3 interface of the voltage output terminal J15. The gate (G) of the MOSFET Q8 is connected to the PA7 interface of the chip U1 through the resistor R31, the source (S) is connected to the ground line, and the drain (D) is connected to the 2 interface of the voltage output terminal J15. The voltage output terminal J15 has its 4-pin connector connected to ground.

10. A flame alarm device, characterized in that, The flame alarm device includes: a power supply component, a detection component, a sensing component, and a functional component; The power supply component is connected to the detection component and is used to provide power to the detection component; The detection component is connected to the detection component and is used to generate wired and wireless signals; The detection component includes a flame alarm circuit as described in any one of claims 1-9; The functional component is connected to the detection component and is used to implement alarm or display functions according to control signals.

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