CN2257942Y - Multifunctional fire alarm - Google Patents

Abstract

The utility model relates to a fire alarm, which is suitable for small and medium-sized shops, storehouses, entertainment places, families and the like. The smoke alarm mainly comprises a smoke sensing circuit formed by connecting a smoke probe, an amplifier and an oscillator, a temperature sensing circuit formed by connecting a temperature probe and a resistance voltage divider, an OR logic gate circuit, a sound alarm circuit with a loudspeaker and a micro emitter. When the smoke intensity or the temperature exceeds a set value, a sound alarm is given out to remind people indoors and outdoors. The miniature transmitter transmits the frequency modulation radio wave of the voice of calling for help, groaning and the like on site for the receiver to receive. Can be used independently or through wireless networking, and has simple structure and low cost.

Description

Multi-functional fire-alarm

The utility model relates to a kind of telltale, relates to a kind of fire-alarm or rather.

The lives and properties that security against fire affects the livelihood of every family, fire failure also causes serious economic loss to country not only for individual Jonah, therefore improves whole people's fire-fighting consciousness, implements and put prevention first, the policy of fire-fighting combination, the condition of a fire takes place put out a fire to save life and property in time in time that relief has crucial meaning.

Using fire alarm system is to implement the important measures of fire-fighting in conjunction with policy, owing to can when condition of a fire original state, send warning, thereby can avoid effectively breeding disaster.At present, reporting to the police and fire-fighting linkage system automatically in networking such as the large scale business site that has, large-scale entertainment service place etc., establishes a main frame and Duo Tai extension set centralized control personal management.Because structure relative complex cost is higher, is unsuitable in middle-size and small-size shop, office building, adds workshop, middle-size and small-size storehouse, middle-size and small-size public place of entertainment even family and promote the use of.

The purpose of this utility model is to be a kind of multi-functional fire-alarm of popularizing use of the place of above-mentioned middle and small scale design, but not only can independently use but also Wireless Networking uses, and has simple in structure, with low cost, the effective advantage of reporting to the police:

Multi-functional fire-alarm of the present utility model, can visit cigarette, temperature detection, spy sound simultaneously, automatically send audible alarm when smog or temperature surpass predetermined limit around alarm, and the startup miniature transmitter is sent on-the-spot presumable voice signal, for receiver reception outside the venue, there is the people to organize the rescue work as early as possible in time to notify the salvor scene of fire.

Multi-functional fire-alarm of the present utility model comprises power circuit, and the audible alarm circuit of fire detector and band loudspeaker is characterized in that:

Described fire detector comprises the smog sensing circuit that is linked in sequence and is constituted by smog probe, amplifier, oscillator, the temperature sensing circuit that connects and composes by temp probe and resitstance voltage divider, two input ends respectively connection oscillator output and resitstance voltage divider dividing point or logic gates, or the audible alarm circuit that logic gates output connects described band loudspeaker is imported;

Comprise that also one launches the miniature transmitter of FM radio set ripple, being linked in sequence by microphone, note amplifier, oscillator and antenna constitutes.

The audible alarm circuit of described band loudspeaker is an electronic switching circuit, and electronic switch controling end connects described or the logic gates output terminal, and the electronic switch two ends connect power supply and loudspeaker respectively.

Described power circuit is linked in sequence by capacity voltage dropping circuit, bridge rectifier circuit and mu balanced circuit and constitutes.

Multifunction alarm device can hang or wall hanging, reminds the indoor personnel on every side that reach with sound equipment when using separately, simultaneously whether the scene is had people's signal to launch for the receiver reception by miniature transmitter; When multiple spot used, with the miniature transmitter networking, a receiver can cooperate a plurality of alarms, when arbitrary alarm sends fire omen alerting signal, but all Auto Power On warnings of receiver.

Further specify technology of the present utility model below in conjunction with the embodiment accompanying drawing

Fig. 1. multi-functional fire-alarm theory diagram

Fig. 2. multi-functional fire-alarm power circuit diagram

Fig. 3. multi-functional fire-alarm miniature transmitter circuit diagram

Fig. 4. multi-functional fire-alarm audible alarm circuit figure

Referring to Fig. 1,31 is power circuit among the figure, and civil power is become V1, V2 two retaining direct supplys for using in the alarm, also can directly adopt electric battery.

Being linked in sequence by microphone 21, amplifier 22, oscillator 23, antenna 24 constitutes miniature transmitter, emission FM radio set ripple.

Connect and compose detection and audible alarm circuit by smog probe 11, amplifier 12, oscillator 13, temperature sensing circuit 14 or logic gate 15, electronic switch 16 and loudspeaker P.When smog or temperature surpass certain value, drive among audible alarm, the figure 17 for the start delay circuit, be used for closing audible alarm in one period time delay after start.

When smokescope surpasses predetermined standard time, oscillator 13 output pulse signals, when temperature surpassed predetermined value, temperature sensing circuit 14 was output as noble potential, or 16 work of logic gate 15 output control electronic switches, sent interrupted or continuous sound equipment.Microphone 21 receives on-the-spot voice signal simultaneously, is launched by antenna 24 after the frequency modulation (PFM) through amplifying also.

Referring to Fig. 2, C4, R13 constitute reduction voltage circuit, and D1-D4 is a bridge rectifier circuit, and this circuit structure can provide bigger working current for a long time.IC3 is three-terminal voltage-stabilizing device (7806), power circuit output V1 (about 7.8V) and V2 (6V).

Referring to Fig. 3, BG3 and peripheral cell thereof connect and compose note amplifier, amplify the voice signal that is received by MIC, BG4 and peripheral cell thereof connect and compose oscillator, finish frequency modulation (PFM), C10, L1 adjustable oscillating frequency, embodiment gets 88-108KHZ, about 200 meters of transmitting range.If there is the people scene of fire, its sound of call for help that sends, the purine sound of moaning etc. can convey to receiver.

Referring to Fig. 4, smog probe GN (MQKI), BG1, BG2 and peripheral cell thereof connect and compose amplifier, R7, D2, C2 connect and compose the start delay circuit, four Sheffer stroke gate F1-F4 (CD4011) and peripheral cell thereof connect and compose oscillator, potentiometer R8, temp probe R11 (NT206), R12 connect and compose resitstance voltage divider, and integrated IC2 (8778) is electronic switch.

When smog surpasses certain standard (can adjust R2 and set the smoke intensity standard, as 1500PPM), the BG1 conducting, BG2 ends, and two input ends of F1 are " 1 " (behind start delay certain hour), and F2 exports " 1 ", F3, F4 produce vibration, send the control end of C2 through C3.When temperature surpasses certain value (as 50 ℃, can adjust R8), the R12 terminal voltage raises, and opens electronic switch.Electronic switch is interrupted break-make under oscillating impulse control, and V1 is connected with P.The sound equipment of embodiment P can have 120 decibels, is enough to remind indoor stranger to hear.

Multi-functional fire-alarm embodiment can be produced in the capsule of 12 * a 8 * 5mm, pore is set on the box body and hanging hole is installed, and will detect pilot lamp L (detecting smog probe GN), smoke intensity regulator potentiometer R2, adjustment potentiometer R8 are arranged on and are convenient to adjustment on the box body.The alarm AC/DC is the best to be hung on apart from ceiling 20cm place.

The utility model alarm has small and light, and cost is low, easy to install flexibly, multiple control The advantage of reporting to the police.

Claims (3)

1, a kind of multi-functional fire-alarm comprises power circuit, and the audible alarm circuit of fire detector and band loudspeaker is characterized in that:

Described fire detector comprises the smog sensing circuit that is linked in sequence and is constituted by smog probe, amplifier, oscillator, the temperature sensing circuit that connects and composes by temp probe and resitstance voltage divider, two input ends respectively connection oscillator output and resitstance voltage divider dividing point or logic gates, or the audible alarm circuit that logic gates output connects described band loudspeaker is imported;

Comprise that also one launches the miniature transmitter of FM radio set ripple, being linked in sequence by microphone, note amplifier, oscillator and antenna constitutes.

2, multi-functional fire-alarm according to claim 1 is characterized in that:

The audible alarm circuit of described band loudspeaker is an electronic switching circuit, and electronic switch controling end connects described or the logic gates output terminal, and the electronic switch two ends connect power supply and loudspeaker respectively.

3, multi-functional fire-alarm according to claim 1 is characterized in that:

Described power circuit is linked in sequence by capacity voltage dropping circuit, bridge rectifier circuit and mu balanced circuit and constitutes.