CN207020799U - Fire communication alarming device - Google Patents

Abstract

The utility model discloses a fire communication alarm device, which includes a fire information collection circuit, a regulation circuit and a drive circuit. The fire information collection circuit uses a smoke collector U1 of the model TAD170 to collect fire smoke information, and the regulation circuit is relatively stable through dual op-amps. Finally, it is used as a driving signal to control the alarm in the driving circuit; the inverting input terminal of the operational amplifier AR1 is connected to the positive input terminal of the operational amplifier AR2, and the output signals of the operational amplifiers AR1 and AR2 are compared without changing the signal frequency. Above, the waveform is adjusted to improve the anti-attenuation ability. In order to further ensure the stability of the signal, the voltage regulator DZ1 is designed to stabilize the voltage. By controlling the base potential of the MOS transistor Q1, the circuit of the alarm LS1 is controlled to be on and off. It replaces the traditional single-chip or PLC control, and retains the advantages of traditional single-chip or PLC control, which is accurate and efficient. At the same time, the control is simple, and it is not easy to cause problems. Once a problem occurs, the maintenance is relatively simple, and it has great practical value and development value.

Description

Fire communication alarm device

technical field

The utility model relates to the field of alarm technology, in particular to a fire communication alarm device.

Background technique

At present, fires are causing more and more losses to people. Whether it is material damage or casualties, it is a major obstacle to human development. Therefore, fire prevention has become the most basic awareness of people, and the corresponding Fire prevention equipment has also been developed one after another. The current fire communication and alarm devices all use single-chip microcomputers or PLC-controlled alarms, which are costly and have weak anti-interference capabilities, slow response, and difficult maintenance once problems occur.

So the utility model provides a new solution to solve this problem.

Contents of the invention

In view of the above situation, in order to overcome the defects of the prior art, the purpose of this utility model is to provide a fire communication alarm device, which has the characteristics of ingenious design and simple structure, and effectively solves the problem of fire detection based on independent photoelectric smoke in the current society. The signal transmission circuit of the alarm depends on the chip to receive and control the alarm, which has high cost, weak anti-interference ability, slow response, and difficult maintenance once a problem occurs.

The technical solution is that the fire communication alarm device includes a fire information acquisition circuit, an adjustment circuit and a drive circuit. The fire information acquisition circuit collects fire smoke information, and after being regulated and stabilized by the adjustment circuit, it is used as a drive signal to control the alarm in the drive circuit to work;

The fire information collection circuit includes a smoke collector U1 whose model is TAD170. The power supply terminal of the smoke collector U1 is connected to a power supply +5V and one end of a resistor R1 and a capacitor C3. The output terminal of the smoke collector U1 is connected to a resistor R1 and a capacitor C3. The other end and one end of the resistors R3 and R2, and the grounding end of the smoke collector U1 are grounded.

Preferably, the regulating circuit includes an op amp AR1, the non-inverting input terminal of the op amp AR1 is connected to the other end of the resistor R3 and one end of the resistor R4, the other end of the resistor R4 is connected to one end of the capacitor C2, and the op amp AR1 The output terminal is connected to the other end of the capacitor C2 and the negative pole of the diode D1, the inverting input terminal of the op amp AR1 is connected to one end of the resistor R5, the other end of the resistor R5 is connected to the positive input end of the op amp AR2, and the op amp AR2 The inverting input terminal is connected to one end of the resistors R6 and R7, the other end of the resistor R6 is grounded, and the other end of the resistor R7 is connected to the output terminal of the op amp AR2, the anode of the regulator tube DZ1 and the anode of the diode D1.

Due to the adoption of the above technical solutions, the utility model has the following advantages compared with the prior art;

1. The fire information collection circuit uses the smoke collector U1 of the model TAD170 to collect fire smoke information. After the adjustment of the dual operational amplifiers in the adjustment circuit is relatively stable, it is used as a driving signal to control the alarm in the driving circuit, replacing the traditional single-chip or PLC control. , It retains the advantages of traditional single-chip or PLC control, precise and efficient, and at the same time, the control is simple, it is not easy to have problems, and once a problem occurs, the maintenance is relatively simple.

2. The inverting input terminal of the operational amplifier AR1 is connected to the non-inverting input terminal of the operational amplifier AR2, and the output signals of the operational amplifiers AR1 and AR2 are compared to adjust the waveform without changing the signal frequency and improve the anti-attenuation In order to further ensure the stability of the signal, the voltage regulator DZ1 is designed to stabilize the voltage. By controlling the base potential of the MOS transistor Q1, the circuit of the alarm LS1 can be controlled on and off, which has great practical value and development value. .

Description of drawings

Fig. 1 is a block diagram of the fire communication alarm device of the present invention.

Fig. 2 is a schematic diagram of the fire communication alarm device of the present invention.

detailed description

The foregoing and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of the embodiments with reference to accompanying drawings 1 to 2 . The structural contents mentioned in the following embodiments are all based on the accompanying drawings of the description.

Various exemplary embodiments of the present utility model will be described below with reference to the accompanying drawings.

Embodiment 1, a fire communication alarm device, including a fire information collection circuit, a regulation circuit and a drive circuit, the fire information collection circuit uses a smoke collector U1 of the model TAD170 to collect fire smoke information, and after the adjustment is stabilized by the dual operational amplifiers of the regulation circuit As a driving signal to control the alarm in the driving circuit to work;

The power supply of the smoke collector U1 is provided by the power supply +5V after being filtered by the resistor R1 and the capacitor C3. At the same time, the resistors R1 and R2 act as a voltage divider to increase the base potential for the output signal of the smoke collector U1. Finally, the smoke collector U1 collects The signal flows into the regulating circuit through the resistor R3.

Embodiment 1. On the basis of Embodiment 2, the regulating circuit adopts the inverting input terminal of the operational amplifier AR1 to connect the non-inverting input terminal of the operational amplifier AR2, and the operational amplifiers AR1 and AR2 compare the output signals, so as to achieve On the basis of changing the signal frequency, adjust the waveform to improve the anti-attenuation ability. In order to further ensure the stability of the signal, a voltage regulator DZ1 is designed to stabilize the voltage. By controlling the base potential of the MOS transistor Q1, the alarm LS1 can be controlled. When there is a fire, the output signal of the adjustment circuit can make the MOS tube Q1 conduct, and the alarm LS1 is energized to send an alarm to remind people of the fire. Under normal circumstances, the signal output by the adjustment circuit cannot make the MOS tube Q1 turn on. Q1 is turned on, and the alarm LS1 is not powered; the non-inverting input terminal of the operational amplifier AR1 is connected to the other end of the resistor R3 and one end of the resistor R4, the other end of the resistor R4 is connected to one end of the capacitor C2, and the output terminal of the operational amplifier AR1 is connected to The other end of the capacitor C2 and the negative pole of the diode D1, the inverting input terminal of the operational amplifier AR1 is connected to one end of the resistor R5, the other end of the resistor R5 is connected to the positive input terminal of the operational amplifier AR2, and the inverting input of the operational amplifier AR2 One end of resistors R6 and R7 is terminated, the other end of resistor R6 is grounded, and the other end of resistor R7 is connected to the output end of operational amplifier AR2, the anode of regulator tube DZ1 and the anode of diode D1; the drive circuit includes MOS transistor Q1 , the base of the MOS tube Q1 is connected to the negative pole of the regulator tube DZ1, the drain of the MOS tube Q1 is connected to the negative pole of the alarm LS1, the positive pole of the alarm LS1 is connected to one end of the resistor R8, the other end of the resistor R8 is grounded, and the MOS tube Q1’s One end of the source resistor R9 and the anode of the diode D3, and the other end of the resistor R9 and the cathode of the diode D3 are connected to the power supply +20V.

During the specific use of the utility model, the fire communication alarm device includes a fire information acquisition circuit, an adjustment circuit and a drive circuit, and the fire information acquisition circuit uses a model of the smoke collector U1 of TAD170 to collect fire smoke information. After the adjustment is stable, it is used as the driving signal to control the alarm in the driving circuit; the power supply of the smoke collector U1 is provided by the power supply +5V after being filtered by the resistor R1 and the capacitor C3, and the resistors R1 and R2 play the role of voltage divider, which is the smoke collector. The output signal of U1 increases the base potential, and finally the signal collected by the smoke collector U1 flows into the adjustment circuit through the resistor R3. Devices AR1 and AR2 compare the output signals to adjust the waveform without changing the signal frequency and improve the anti-attenuation ability. In order to further ensure the stability of the signal, a voltage regulator DZ1 is designed to stabilize the voltage. By controlling the MOS tube Q1 Under normal circumstances, the signal output by the adjustment circuit cannot turn on the MOS tube Q1, and the alarm LS1 cannot be powered. When there is a fire, the signal output by the adjustment circuit The MOS tube Q1 can be turned on, and the alarm LS1 is energized to send an alarm to remind people of a fire.

The above is a further detailed description of the utility model in conjunction with specific embodiments, and it cannot be determined that the specific implementation of the utility model is limited to this; Under the premise of the idea of the scheme, the expansion, operation method, and data replacement should all fall within the protection scope of the present utility model.

Claims (3)

1. fire communication alarming device, including fire information Acquisition Circuit, regulation circuit and drive circuit, it is characterised in that fire Calamity information acquisition circuit gathers fire hazard aerosol fog information, as in drive signal control drive circuit after adjusted circuit regulation is stable Siren works；

The fire information Acquisition Circuit includes model TAD170 smoke collection device U1, smoke collection device U1 power supply termination Power supply+5V and resistance R1, electric capacity C3 one end, smoke collection device U1 output terminating resistor R1, electric capacity the C3 other end and electricity Hinder R3, R2 one end, smoke collection device U1 earth terminal ground connection.

2. fire communication alarming device as claimed in claim 1, it is characterised in that the regulation circuit includes transport and placing device AR1, transports Put the device AR1 normal phase input end connecting resistance R3 other end and resistance R4 one end, the one of resistance R4 another termination capacitor C2 End, transport and placing device AR1 the output termination capacitor C2 other end and diode D1 negative pole, transport and placing device AR1 anti-phase input termination Resistance R5 one end, resistance R5 another termination transport and placing device AR2 normal phase input end, transport and placing device AR2 anti-phase input termination electricity Hinder R6, R7 one end, resistance R6 other end ground connection, resistance R7 another termination transport and placing device AR2 output end and voltage-stabiliser tube DZ1 Positive pole and diode D1 positive pole.

3. fire communication alarming device as claimed in claim 2, it is characterised in that the drive circuit includes metal-oxide-semiconductor Q1, MOS Pipe Q1 base stage connects voltage-stabiliser tube DZ1 negative pole, metal-oxide-semiconductor Q1 drain electrode device LS1 taking alarm negative pole, and alarm LS1 positive pole connects Resistance R8 one end, resistance R8 other end ground connection, metal-oxide-semiconductor Q1 source resistance R9 one end and diode D3 positive pole, electricity The negative pole of the other end and diode D3 that hinder R9 meets power supply+20V.