Bus detection device of fire alarm system

Abstract

The utility model relates to the technical field of fire alarm systems, and discloses a bus detection device of a fire alarm system, which comprises a signal input module; a signal output module; a control module; a relay module; an isolation module; the signal input module can receive passive contact signals and current or voltage signals during detection, the flexibility and expansibility of the device are improved, the signal output module and the control module can quickly respond to instructions of the controller, fire fighting equipment is controlled to act, fire is put out in time, and the fire fighting safety is improved. The relay module can prolong the communication distance, enhance the anti-interference capability and ensure the stability and reliability in the signal transmission process, and the isolation module can quickly isolate the fault part when the system bus breaks down, so that the fault diffusion is prevented, and the stability of the device is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to fire alarm system technical field, concretely is a kind of fire alarm system bus detection device. BACKGROUND

[0002] Fire alarm system, also known as fire alarm system (Fire Alarm System, FAS for short), is an automatic fire protection facility set in buildings or other places for early detection of fire and timely take effective measures to control and extinguish fire, and is a powerful tool for people to fight fire.

[0003] Through the search, the patent with application No. CN201810169270.3 discloses a kind of fire alarm system and detection alarm device.The fire alarm system includes: communication bus and a plurality of detection alarm devices respectively connected on the communication bus;Wherein, the detection alarm device includes detection module and alarm module;After the detection module of any detection alarm device detects abnormal value, send prompt information to alarm module;After the alarm module receives the prompt information, send alarm and send alarm information to the communication bus;Except the detection alarm device that sends prompt information, the alarm module of other detection alarm device receives the alarm information through the communication bus and sends alarm.The application can be installed in unit, simple structure, easy to install, and can realize the purpose of discovering fire and timely alarm.

[0004] Current fire alarm system is not strong in expansibility, it is inconvenient to increase or reduce detector and alarm equipment through bus according to actual demand, reduces the adaptability and flexibility of device;And the reliability of current fire alarm system needs to be improved, the signal transmission speed between systems is slow, instruction transmission is not timely, which is not conducive to the timely extinguishing of fire, so we need to put forward a kind of fire alarm system bus detection device. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind of fire alarm system bus detection device, signal input module can receive including passive contact signal, current or voltage signal when detecting, improve the flexibility and expansibility of device, signal output module and control module can respond to the instruction of controller quickly, control fire-fighting equipment action, realize the timely extinguishing of fire, relay module can extend communication distance and enhance anti-interference ability, ensure the stability and reliability in signal transmission process, isolation module can rapidly isolate fault part when system bus fails, prevent fault diffusion, further improve the stability of device, to solve the problems raised in the above background.

[0006] In order to realize the above object, the utility model provides the following technical scheme: a fire alarm system bus detection device, including

[0007] Signal input module for receiving passive contact signal, current or voltage signal of fire fighting equipment;

[0008] Signal output module for controlling start-stop or switching of fire fighting equipment;

[0009] Control module can output on-off signal to drive the action of controlled fire fighting equipment and receive feedback signal of fire fighting equipment;

[0010] Relay module can prolong bus communication distance and enhance system anti-interference ability;

[0011] Isolation module is connected in front end of system and timely isolates rear-end equipment when loop fault occurs;

[0012] Signal input module, signal output module, relay module and isolation module are electrically connected with control module, signal input module is electrically connected with isolation module and relay module respectively, output module is electrically connected with isolation module, and isolation module is electrically connected with relay module.

[0013] Preferably, signal input module includes amplifier U3, MOS tube J2 and MOS tube J3, resistance R14 and resistance R13 are connected in series at the 5th pin of amplifier U3, diode D9, diode D10, diode D12 and diode D13 are connected between resistance R14 and resistance R13 respectively, one end of diode D9 is connected with resistance R15, one end of diode D10 is connected with diode D11, one end of diode D12 is connected with resistance R16, one end of diode D13 is connected with diode D14, resistance R15 is connected at the gate of MOS tube J2, diode D11 is connected at the drain of MOS tube J2, resistance R16 is connected at the gate of MOS tube J3, diode D14 is connected at the drain of MOS tube J3.

[0014] Preferably, signal output module includes amplifier U1A, resistance R7 and capacitor C1 are connected in parallel between the 1st pin and the 2nd pin of amplifier U1A, capacitor E1 is connected at the 2nd pin of amplifier U1A, one end of capacitor E1 is connected with resistance R1, resistance R2, resistance R3 and resistance R4 arranged in parallel, resistance R5, resistance R6 and capacitor E2 arranged in parallel are connected at the 3rd pin of amplifier U1A, capacitor E3, adjustable resistance VR1A and resistance R8 arranged in series are connected at the 1st pin of amplifier U1A.

[0015] Preferably, the relay module comprises a chip U10, a triode Q1, the pin 1 of the chip U10 is connected with the collector of the triode Q1, the pin 4 and the pin 5 of the chip U10 are connected with a crystal oscillator X1, the both ends of the crystal oscillator X1 are connected with a capacitor C3 and a capacitor C4, the base of the triode Q1 is connected with a resistor R20, the resistor R20 and the emitter of the triode Q1 are connected with a resistor R10, and the capacitor E3 and the resistor R30 are connected between the resistor R20 and the collector of the triode Q1.

[0016] Preferably, the relay module further comprises a triode Q2 and a triode Q3 which are arranged in parallel, the emitter of the triode Q2 and the emitter of the triode Q3 are both connected on the pin 2 of the chip U10, the base of the triode Q2 is connected on the pin 6 of the chip U10, and the base of the triode Q3 is connected on the pin 7 of the chip U10.

[0017] Preferably, the isolation module comprises an optical coupler U1, the pin 1 of the optical coupler U1 is connected with a resistor R28 connected with 5V, the pin 3 and the pin 4 of the optical coupler U1 are connected with a capacitor C18, and the pin 3 of the optical coupler U1 is connected with a resistor R18 and a resistor R38 respectively.

[0018] Preferably, the isolation module further comprises an optical coupler U2, the pin 1 and the pin 2 of the optical coupler U2 are connected with a capacitor C28, the pin 1 of the optical coupler U2 is connected with a resistor R48 and a resistor R58 respectively, and the pin 3 of the optical coupler U2 is connected with a resistor R68.

[0019] Compared with the prior art, the utility model has the advantages that:

[0020] 1、The signal input module of the utility model can receive passive contact signal, current or voltage signal during detection, improve the flexibility and expansibility of the device, the signal output module and the control module can quickly respond to the instruction of the controller, control the action of the fire-fighting equipment, and realize the timely fire extinguishing.

[0021] 2、The relay module of the utility model can prolong the communication distance and enhance the anti-interference ability, ensure the stability and reliability in the signal transmission process, the isolation module can quickly isolate the fault part when the system bus fails, prevent the fault from spreading, and further improve the stability of the device. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the system block diagram of the utility model;

[0023] Figure 2 It is the circuit diagram of the signal input module of the utility model;

[0024] Figure 3 It is the circuit diagram of the signal output module of the utility model;

[0025] Figure 4 The circuit diagram of the relay module in the utility model;

[0026] Figure 5 The circuit diagram of the isolation module in the utility model. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be apparently and completely described in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor fall within the protection scope of the utility model.

[0028] Please refer to Figures 1-5 The utility model provides a kind of technical scheme: a fire alarm system bus detection device, comprising:

[0029] Signal input module for receiving passive contact signal, current or voltage signal of fire-fighting equipment;

[0030] The signal input module includes an amplifier U3, MOS tube J2, MOS tube J3, the 5 pin of the amplifier U3 is connected with resistance R14 and resistance R13 in series, diode D9, diode D10, diode D12, diode D13 are connected between resistance R14 and resistance R13 respectively, one end of diode D9 is connected with resistance R15, one end of diode D10 is connected with diode D11, one end of diode D12 is connected with resistance R16, one end of diode D13 is connected with diode D14, resistance R15 is connected at the gate of MOS tube J2, diode D11 is connected at the drain of MOS tube J2, resistance R16 is connected at the gate of MOS tube J3, diode D14 is connected at the drain of MOS tube J3.

[0031] The resistor R13, the resistor R14, the resistor R15, the resistor R16 play the role of current limiting and voltage division; the diode D9, the diode D10, the diode D12, the diode D13 are all transient voltage suppression diodes, which are used for protecting the circuit from transient high voltage impact; the MOS tube J2 and the MOS tube J3 are used for signal amplification and switch control. When transient high voltage occurs, the TVS tube rapidly conducts to clamp the overvoltage at a safe level, thereby protecting the subsequent circuit components; the resistor R15 and the resistor R16 cooperate with the MOS tube J2 and the MOS tube J3 to perform preliminary voltage regulation or current-voltage conversion on the input signal. The signal after the preliminary processing enters the non-inverting input terminal of the amplifier U3 through the resistor R14, is amplified and processed, and is output from the pin 7 (OutPut) to meet the requirements of the subsequent circuit on the signal amplitude and the like.

[0032] The signal output module is used for controlling the start-stop or switching of the fire-fighting equipment.

[0033] The signal output module comprises an amplifier U1A, a resistor R7 and a capacitor C1 connected in parallel between the 1th pin and the 2th pin of the amplifier U1A, a capacitor E1 connected to the 2th pin of the amplifier U1A, a resistor R1, a resistor R2, a resistor R3 and a resistor R4 connected in parallel and connected to one end of the capacitor E1, a resistor R5 and a resistor R6 and a capacitor E2 connected in parallel and connected to the 3th pin of the amplifier U1A, and a capacitor E3, an adjustable resistor VR1A and a resistor R8 connected in series and connected to the 1th pin of the amplifier U1A.

[0034] The resistors R1-R8 play the roles of current limiting, voltage division, setting of amplification multiple and the like. The capacitors C1 and C2 are used for filtering, coupling or decoupling; the capacitors E1, E2 and E3 are used for power supply filtering; the amplifiers U1A and U1C perform amplification and the like on the input signal; and the adjustable resistor VR1A can change the circuit parameters by adjustment.

[0035] The control module can output a switching signal to drive the action of the controlled fire-fighting equipment and can receive a feedback signal of the fire-fighting equipment.

[0036] The relay module can extend the bus communication distance and enhance the anti-interference ability of the system.

[0037] The relay module comprises a chip U10 and a transistor Q1, the 1th pin of the chip U10 is connected with the collector of the transistor Q1, a crystal oscillator X1 is connected between the 4th pin and the 5th pin of the chip U10, the capacitor C3 and the capacitor C4 are respectively connected to the two ends of the crystal oscillator X1, the resistor R20 is connected to the base of the transistor Q1, the resistor R10 is connected between the resistor R20 and the emitter of the transistor Q1, and the capacitor E3 and the resistor R30 are connected between the resistor R20 and the collector of the transistor Q1.

[0038] The relay module further comprises a transistor Q2 and a transistor Q3 connected in parallel, the emitter of the transistor Q2 and the emitter of the transistor Q3 are both connected to pin 2 of the chip U10, the base of the transistor Q2 is connected to pin 6 of the chip U10, and the base of the transistor Q3 is connected to pin 7 of the chip U10.

[0039] The crystal oscillator X1 provides a clock signal to ensure that the components of the chip U10 can work synchronously, the transistor Q2 and the transistor Q3 are used for signal amplification, switching and other processing, and cooperate with the pin output control signal of the chip U10;

[0040] The relay module further comprises a level conversion chip U20 and a level conversion chip U30, which are used for converting the TTL level signal of the chip U10 into an RS-485 level signal, realizing long-distance and multi-device communication, and the A pin and the B pin are used for differential signal transmission.

[0041] The isolation module is connected to the front end of the system and isolates the rear-end device in time when a loop fault occurs;

[0042] The isolation module comprises an optocoupler U1, the pin 1 of the optocoupler U1 is connected with a resistor R28 connected to 5V, the pin 3 and the pin 4 of the optocoupler U1 are connected with a capacitor C18, and the pin 3 of the optocoupler U1 is connected with a resistor R18 and a resistor R38, respectively.

[0043] The isolation module further comprises an optocoupler U2, the pin 1 and the pin 2 of the optocoupler U2 are connected with a capacitor C28, the pin 1 of the optocoupler U2 is connected with a resistor R48 and a resistor R58, respectively, and the pin 3 of the optocoupler U2 is connected with a resistor R68.

[0044] The optocoupler U1 and the optocoupler U2 internally comprise a light-emitting diode and a photosensitive transistor, are used for electrical isolation between input and output, realize photoelectric-electric-optical conversion of signals, and electrically isolate the circuits on the input side and the output side, prevent electrical interference of the circuits on the two sides from affecting each other, and enhance the anti-interference ability and safety of the circuit.

[0045] The signal input module, the signal output module, the relay module and the isolation module are electrically connected with the control module, the signal input module is electrically connected with the isolation module and the relay module, respectively, the output module is electrically connected with the isolation module, and the isolation module is electrically connected with the relay module.

[0046] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A fire alarm system bus detection apparatus, characterized by, The application relates to a fire-fighting device control system, which comprises the following parts: a signal input module for receiving passive contact signals, current or voltage signals of the fire-fighting device; a signal output module for controlling the start-stop or switching of the fire-fighting device; a control module capable of outputting switch signals to drive the action of the controlled fire-fighting device and receiving feedback signals of the fire-fighting device; a relay module capable of extending the communication distance of the bus and enhancing the anti-interference capability of the system; and an isolation module connected at the front end of the system and capable of isolating the rear-end device in time when a loop fault occurs. The signal input module comprises an amplifier U3, a MOS tube J2 and a MOS tube J3; the 5th pin of the amplifier U3 is connected with a resistor R14 and a resistor R13 in series; diodes D9, D10, D12 and D13 are respectively connected between the resistor R14 and the resistor R13; one end of the diode D9 is connected with a resistor R15; one end of the diode D10 is connected with a diode D11; one end of the diode D12 is connected with a resistor R16; one end of the diode D13 is connected with a diode D14; the resistor R15 is connected to the gate of the MOS tube J2; the diode D11 is connected to the drain of the MOS tube J2; the resistor R16 is connected to the gate of the MOS tube J3; and the diode D14 is connected to the drain of the MOS tube J3. The signal output module comprises an amplifier U1A; the 1st pin and the 2nd pin of the amplifier U1A are connected with a resistor R7 and a capacitor C1 arranged in parallel; the 2nd pin of the amplifier U1A is connected with a capacitor E1; one end of the capacitor E1 is connected with a resistor R1, a resistor R2, a resistor R3 and a resistor R4 arranged in parallel; the 3rd pin of the amplifier U1A is connected with a resistor R5, a resistor R6 arranged in parallel and a capacitor E2; and the 1st pin of the amplifier U1A is connected with a capacitor E3, an adjustable resistor VR1A and a resistor R8 arranged in series. The relay module comprises a chip U10 and a triode Q1; the 1st pin of the chip U10 is connected with the collector of the triode Q1; a crystal oscillator X1 is connected between the 4th pin and the 5th pin of the chip U10; the two ends of the crystal oscillator X1 are respectively connected with a capacitor C3 and a capacitor C4; the base of the triode Q1 is connected with a resistor R20; the resistor R20 and the emitter of the triode Q1 are connected with a resistor R10; and the capacitor E3 and a resistor R30 are connected between the resistor R20 and the collector of the triode Q1. The relay module further comprises a triode Q2 and a triode Q3 arranged in parallel; the emitter of the triode Q2 and the emitter of the triode Q3 are both connected to the 2nd pin of the chip U10; the base of the triode Q2 is connected to the 6th pin of the chip U10; and the base of the triode Q3 is connected to the 7th pin of the chip U10. ​ ​ 2. A fire alarm system bus detection apparatus according to claim 1, characterised in that: ​ 3. A fire alarm system bus detection apparatus according to claim 1, characterised in that: ​ 4. A fire alarm system bus detection apparatus according to claim 1, characterised in that: ​ 5. A fire alarm system bus detection apparatus according to claim 4, characterised in that: ​ 6. A fire alarm system bus detection apparatus according to claim 1, wherein: The isolation module includes a photo-coupler U1, a resistor R28 connected to the pin 1 of the photo-coupler U1, a capacitor C18 connected between the pin 3 and the pin 4 of the photo-coupler U1, and a resistor R18 and a resistor R38 connected to the pin 3 of the photo-coupler U1 respectively.

7. A fire alarm system bus detection apparatus according to claim 6, characterised in that: The isolation module further includes a photo-coupler U2, a capacitor C28 connected between the pin 1 and the pin 2 of the photo-coupler U2, a resistor R48 and a resistor R58 connected to the pin 1 of the photo-coupler U2 respectively, and a resistor R68 connected to the pin 3 of the photo-coupler U2.

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