CN201294032Y - Fire acousto-optic alarm - Google Patents
Fire acousto-optic alarm Download PDFInfo
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- CN201294032Y CN201294032Y CNU2008201746349U CN200820174634U CN201294032Y CN 201294032 Y CN201294032 Y CN 201294032Y CN U2008201746349 U CNU2008201746349 U CN U2008201746349U CN 200820174634 U CN200820174634 U CN 200820174634U CN 201294032 Y CN201294032 Y CN 201294032Y
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Abstract
The utility model relates to an acousto-optic fire alarm, which comprises a power portion, an optical alarm portion and an acoustical alarm portion, wherein the power portion includes a non-polar circuit, a current-limiting circuit and a voltage-stabilizing circuit, the optical alarm portion is composed of a time-base oscillating circuit, two groups of super bright light emitting diodes and a transparent outer case, and the acoustical alarm portion consists of a tonal varying fire alarm sound circuit, a resonance drive circuit and a piezoelectric ceramic buzzer. The acousto-optic fire alarm is simple in circuits, high in electrooptic / electroacoustic conversion efficiency, low in power consumption, small in impulse current, stable and reliable in operation, long in service life and widely applicable to the acoustic-optic fire alarm of automatic fire alarm systems.
Description
Technical field:
The utility model relates to a kind of acoustooptic alarm, and especially the fire acoustooptic alarm belongs to the automatic fire alarm technical field.
Background technology:
The fire acoustooptic alarm is to be installed in on-the-spot sound and light alarm equipment in automatic fire alarm system, sends strong cycle flash of light and modified tone fire alarm sound behind the fire, notes to remind the field staff.Comprise acoustic alarm and light warning two parts, using at present in the most general acoustooptic alarm light part of reporting to the police adopts neon flash tube internal gas is breakdown under the 5KV high pressure triggers and flash, the operating voltage of neon flash tube is 200V～300V, needing inductor, field effect transistor, 400V/47uF storage capacitor to constitute the vibration tank circuit provides negative and positive voltage, needs bidirectional trigger diode, controllable silicon, high pressure trigger winding composition trigger circuit that trigger voltage is provided.Sound alarm part is made of four tones of standard Chinese pronunciation Music Clip, transformer Class C power drive circuit, piezoelectric ceramic piece, and transformer output terminal resonance produces the crest voltage of 300V.
The subject matter that exists: circuit complexity, the failure rate height, life-span is short, small product size is big, power-on impact current is big (can to reach 0.5A～1A), power consumption big (the average working current is about 120mA), inside has high pressure can't be applied to have the place of damp/dust as the essential safe type product.
The utility model content:
For solving the deficiency that prior art exists, the utility model purpose is to satisfy under the prerequisite of product industry standard GA385-2002 " fire sound and/or light warning horn ", provide a kind of circuit simple, electric light/electro-acoustic conversion efficiency height, low in energy consumption, dash current is little, volume is small and exquisite, and working stability is reliable, the life-span is long, can be used as the fire acoustooptic alarm of essential safe type product.
For achieving the above object, the utility model fire acoustooptic alarm is reported to the police partly by power unit, light and acoustic alarm is partly formed, and described power unit is made of nonpolarity circuit, current-limiting circuit and mu balanced circuit; Light is reported to the police and partly is made of time-base oscillation circuit, light emission drive circuit, two groups of highlighted light emitting diodes and translucent outer cover, light emission drive circuit connects the output of time-base oscillation circuit, two groups of highlighted light emitting diodes of the output termination of light emission drive circuit, two groups of highlighted light emitting diodes place in the translucent outer cover; The acoustic alarm part is made of modified tone fire alarm acoustic-electric road, resonance drive circuit and piezoelectric ceramic piece and sounder resonator, the input termination modified tone fire alarm acoustic-electric road of resonance drive circuit, and its output termination piezoelectric ceramic piece, piezoelectric ceramic piece places in the sounder resonator.
Constitute by the bridge circuit that commutation diode VD1～VD4 forms according to the nonpolarity circuit of above-described power unit, current-limiting circuit is made of resistance R 1～R3 and resettable fuse F1, and mu balanced circuit is made up of voltage stabilizing diode VZ1, triode VT1, filter capacitor C3, C4.
Described light warning part time-base oscillation driving circuit is by time-base integrated circuit N1 and peripheral circuit, described light emission drive circuit is made up of resistance R 8 and triode VT2, resistance R 8 connects the output pin 3 of time-base integrated circuit N1, super bright light emitting diode HL1, HL3, HL5, HL7 series connection back with connect after super bright light emitting diode HL2, HL4, HL6, the HL8 parallel connection, two groups of super bright light emitting diodes are connected on the output terminal of light emission drive circuit, the translucent outer cover that the outside of two groups of super bright light emitting diodes is covered with is for red, and inside surface is the annular concentric groove and radial type trench intersects formation.Adjustment by the time-base oscillation dutycycle makes light report to the police the average working current of part about 2mA, and dash current is less than 20mA.
The modified tone fire alarm acoustic-electric route two-stage time-base oscillation circuit of acoustic alarm part is formed, the multivibrator that the first order is made of time-base integrated circuit N2 and peripheral circuit, the voltage-controlled oscillator (VCO) that the second level is made of time-base integrated circuit N3 and peripheral circuit, resonance drive circuit is made up of resistance R 17 triode VT4, VT5, inductance L 1, and resistance R 17 connects between the output pin 3 of time-base integrated circuit N3, the collector and ground that piezoelectric ceramic piece B1 is connected on triode VT5.Sounder resonator is used for the installation of piezoelectric ceramics piezo B1.By the current limliting of sounder resonator to the energy efficient resonant amplification of sound and current-limiting resistance R19, inductance L 1, make the average working current of acoustic alarm part about 40mA, dash current is less than 120mA.
Described sounder resonator is used for the location of light emitting diode simultaneously, and two groups of super bright light emitting diodes intersections are distributed on the end face of sounder resonator, make the warning light signal even.
Fire acoustooptic alarm power unit provided by the utility model partly provides operating voltage for report to the police part and acoustic alarm of light, and nonpolarity circuit can be realized the nonpolarity of power supply wiring, prevents to cause device damage or can't operate as normal because of the wrong line.Current-limiting circuit breaks down or carries out current limliting during short circuit when bridge circuit, can blow fault acoustooptic alarm and circuit are disconnected when electric current is excessive, and other circuit is played the current-limiting protection effect.Mu balanced circuit makes output voltage all have advantages of higher stability.The time-base oscillation circuit of light warning part and light emission drive circuit can be reported to the police luminous alarm element-two group highlighted light emitting diode by certain frequency scintillation, do luminous alarm element owing to adopt two groups of highlighted light emitting diodes, required working current is very little, energy-conservation and long service life.The modified tone fire alarm acoustic-electric road that the acoustic alarm part is made up of two-stage time-base oscillation circuit makes the average working current of acoustic alarm part about 40mA, and dash current is less than 120mA.The sounder resonator of fire acoustooptic alarm is used for the location of light emitting diode simultaneously, and two groups of super bright light emitting diodes intersect to be distributed on makes the warning light signal even on its end face, reduced the volume of warning horn simultaneously.
About can realizing that according to above-described the utility model fire acoustooptic alarm average working current is less than 50mA, dash current works in DC 24V voltage less than 150mA, and power consumption is less than 1.2W, connects zena's safety barrier and can be used as the essential safe type product and use.
In sum, the utility model compared with prior art has the remarkable advantage that circuit is simple, low in energy consumption, dash current is little, can be used as the essential safe type product, realizing efficiently electric light/electroacoustic conversion simultaneously, reduced product volume, improved life of product.
Description of drawings:
Fig. 1 is the fire acoustooptic alarm electricity theory diagram of prior art;
Fig. 2 is a fire acoustooptic alarm electricity theory diagram of the present utility model;
Fig. 3 is the electrical schematic diagram of fire acoustooptic alarm embodiment of the present utility model;
Fig. 4 is the cut-open view of translucent outer cover in the fire acoustooptic alarm of the present utility model;
Fig. 5 is the cut-open view of sounder resonator in the fire acoustooptic alarm of the present utility model;
Fig. 6 is the top view of sounder resonator in the fire acoustooptic alarm of the present utility model.
Among the figure: 1, sounder resonator, B1 piezoelectric ceramics piezo, 2, printed board, 3, first resonant cavity, 4, second resonant cavity.
Embodiment:
Further specify enforcement of the present utility model below in conjunction with accompanying drawing.Fig. 1 is the fire acoustooptic alarm electricity theory diagram of prior art.Fig. 2 is a fire acoustooptic alarm electricity theory diagram of the present utility model.Referring to Fig. 2, fire acoustooptic alarm circuit part provided by the utility model is reported to the police partly by power unit, light and acoustic alarm is partly formed, and light is reported to the police and partly is made of time-base oscillation circuit, light emission drive circuit, two groups of highlighted light emitting diodes; The acoustic alarm part is made of modified tone fire alarm acoustic-electric road, resonance drive circuit and piezoelectric ceramic piece.
Fig. 3 is a fire acoustooptic alarm electrical schematic diagram of the present utility model.Referring to shown in Figure 3, the nonpolarity circuit of the utility model power unit is made of the bridge circuit that VD1～VD4 forms, and realizes the nonpolarity of power supply wiring, prevents to cause device damage or can't operate as normal because of the wrong line.Current-limiting circuit is made of resistance R 1～R3 and resettable fuse F1, and resistance R 1, R2 are positioned at the bridge circuit front end, when bridge circuit breaks down or carries out current limliting during short circuit, can blow fault acoustooptic alarm and circuit are disconnected when electric current is excessive.Resistance R 3, resettable fuse F1 play the current-limiting protection effect to other circuit, and resettable fuse F1 heating disconnects when instantaneous overload occurring, and overload is eliminated the back and recovered conducting state automatically.
Mu balanced circuit is formed serial regulating circuit by voltage stabilizing diode VZ1, triode VT1, resistance R 4, filter capacitor C3, C4, the output of bridge circuit be provided with filter capacitor C1, C2 to power supply in spike disturb and carry out first order filtering.Filter capacitor C3, C4 carry out second level filtering to out-put supply, make the two-stage output voltage all have advantages of higher stability.
Referring to shown in Figure 3, the utility model light warning part time-base oscillation circuit constitutes typical multivibrator by time-base integrated circuit N1 and timing resistor R5～R7, timing capacitor C5, the control diode VD5 that charges, discharge control diode VD6.Time-base integrated circuit N1 is general time-base integrated circuit NE555, and resistance R 5, charging control diode VD5, resistance R 6, capacitor C 5 constitute charge circuit, and capacitor C 5, resistance R 7, discharge control diode VD6 constitute discharge loop.
Oscillatory circuit oscillation period is T=0.693 (R5+R6+R7+2R
D) C5, the output pulse duty factor is D=(R5+R6+R
D)/(R5+R6+R7+R
D), R wherein
DBe the forward conduction resistance of charge and discharge control diode VD5, VD6, the selection by parameter makes oscillation period T at 0.67s～1s, and promptly the basic flashing rate of fire acoustooptic alarm is in 60～90 times/min scope; Dutycycle D is about 0.1.
Referring to shown in Figure 3, the utility model adopts two groups of super bright light emitting diodes as light-emitting component, glow current only needs 1/10 of common light emitting diode, and in parallel again by triode VT2 driven for emitting lights after per 4 series connection of HL1～HL8, resistance R 9, R10 are current-limiting resistance.Because dutycycle D about 0.1, can not influence the average luminescence electric current with 10 times of light emitting diode peak point current raisings, improves mission life.
Referring to shown in Figure 3, the acoustic alarm of the present utility model fire alarm acoustic-electric route two-stage time-base oscillation circuit that partly modifies tone constitutes, the 1st grade of time-base oscillation circuit constitutes multivibrator by time-base integrated circuit N2 and timing resistor R11～R12, timing capacitor C8, resistance R 11, capacitor C 8 constitute charge circuit, and capacitor C 8, resistance R 12 constitute discharge loop.Oscillatory circuit oscillation period is T=0.693 (R11+R12) C8, and the selection by parameter makes oscillation period T at 1.5s～2.5s, i.e. the sounding cycle of fire acoustooptic alarm.
The 2nd grade of time-base oscillation circuit constitutes voltage controlled oscillator by time-base integrated circuit N3 and timing resistor R15～R16, timing capacitor C10, voltage control circuit, and voltage control circuit is made of resistance R 13, R14, triode VT3, capacitor C 11.The conducting degree of oscillating voltage control triode VT3 on the capacitor C 8 of the 1st grade of multivibrator, thereby the VC terminal voltage of change time-base integrated circuit N3.For the multi resonant controlled oscillator fundamental oscillation cycle be T=0.693 (R15+R16) C10, capacitor C 10 charging, in the discharge process voltage at V
CC/ 3～2V
CC/ 3 variations, but when the VC of time-base integrated circuit N3 voltage controlled change, the duration of charging of capacitor C 10 changes, thereby oscillation frequency is changed, and produces modified tone fire alarm sound.Time-base integrated circuit N2, N3 are general time-base integrated circuit NE555.
Referring to shown in Figure 3, the resonance drive circuit of the utility model acoustic alarm part is made up of two-stage drive circuit such as inductance L 1, triode VT4, VT5, and resistance R 17, R18, triode VT4 are the 1st grade of driving; Triode VT5, inductance L 1 are the 2nd grade of resonant drive, and resistance R 18 provides the base drive electric current for triode VT5 after the triode VT4 conducting; Resistance R 19 is a current-limiting resistance, and capacitor C 13 is acoustic alarm part storage capacitor, and both and inductance L 1 acting in conjunction restriction power-on impact current are less than 120mA.
Referring to shown in Figure 4, the ingredient that the utility model adopts translucent red acryl outer cover to report to the police as light, its inside surface is the annular concentric groove and radial type trench intersects formation, the point source of light that every light emitting diode is sent diffuses into ring-type, flat light source, makes at 25m place, fire acoustooptic alarm dead ahead light signal high-visible in conjunction with the luminous high warning of inter-train pause.
Referring to shown in Figure 5, it is the piezoelectric ceramics piezo of 3kHz that the utility model acoustic alarm part sound-electricity conversion device adopts resonance frequency, is installed on sounder resonator 1 inner convex platform.Piezoelectric ceramics piezo B1 and sounder resonator end face form first resonant cavity 3, and after sounder resonator was installed in the printed board 2, piezoelectric ceramics piezo and printed board 2 formed second resonant cavity 4.
Referring to shown in Figure 6, (HL1～HL8) is positioned in the groove on sounder resonator 1 surface (only having marked a light emitting diode among the figure) light emitting diode, two groups of highlighted light emitting diodes intersect uniform on annulus, make the light that sends even, guarantee that simultaneously the luminous intensity of fire acoustooptic alarm under the situation of one group of led failure still meets the demands.
Referring to shown in Figure 3, the utility model inductance L 1 (100mH) produces resonance, resonance frequency with the interpolar equivalent capacity (about 0.022uF) of piezoelectric ceramics piezo
Be about about 3kHz, the natural resonance frequency of the fire alarm acoustical signal frequency that promptly modifies tone and piezoelectric ceramics piezo is basic identical.
Claims (5)
1, a kind of fire acoustooptic alarm partly is made up of power unit, light warning part and acoustic alarm, it is characterized in that power unit is made of nonpolarity circuit, current-limiting circuit and mu balanced circuit; Light is reported to the police and partly is made of time-base oscillation circuit, light emission drive circuit, two groups of highlighted light emitting diodes and translucent outer cover, light emission drive circuit connects the output of time-base oscillation circuit, two groups of highlighted light emitting diodes of the output termination of light emission drive circuit, two groups of highlighted light emitting diodes place in the translucent outer cover; The acoustic alarm part is made of modified tone fire alarm acoustic-electric road, resonance drive circuit and piezoelectric ceramic piece and sounder resonator, the input termination modified tone fire alarm acoustic-electric road of resonance drive circuit, and its output termination piezoelectric ceramic piece, piezoelectric ceramic piece places in the sounder resonator.
2, fire acoustooptic alarm according to claim 1, the nonpolarity circuit that it is characterized in that described power unit is made of commutation diode (VD1-VD4), current-limiting circuit is made of resistance (R1-R3) and resettable fuse (F1), and mu balanced circuit is made up of voltage stabilizing diode (VZ1), triode (VT1), filter capacitor (C3, C4).
3, fire acoustooptic alarm according to claim 1, the time-base oscillation circuit that it is characterized in that described light warning part is made of time-base integrated circuit (N1) and peripheral circuit, described light emission drive circuit is made up of resistance (R8) and triode (VT2), resistance (R8) connects the output pin 3 of time-base integrated circuit (N1), super bright light emitting diode (HL1, HL3, HL5, HL7) series connection back with connect after super bright light emitting diode (HL2, HL4, HL6, HL8) parallel connection, two groups of super bright light emitting diodes are connected on the output terminal of light emission drive circuit, the translucent outer cover that the outside of two groups of super bright light emitting diodes is covered with is for red, and inside surface is the annular concentric groove and radial type trench intersects formation.
4, according to the described fire acoustooptic alarm of claim 1, it is characterized in that modified tone fire alarm acoustic-electric route two-stage time-base oscillation circuit is formed in the described acoustic alarm part, the multivibrator that the first order is made of time-base integrated circuit N2 and peripheral circuit, the voltage-controlled oscillator (VCO) that the second level is made of time-base integrated circuit N3 and peripheral circuit, resonance drive circuit is made up of resistance (R17) triode (VT4, VT5), inductance (L1), and output pin 3, piezoelectric ceramic piece (B1) that resistance (R17) connects time-base integrated circuit (N3) are connected between the collector and ground of triode (VT5).
5, according to claim 1 or 3 described fire acoustooptic alarms, it is characterized in that inside is equipped with the location that the sounder resonator of piezoelectric ceramic piece is used for light emitting diode simultaneously, two groups of super bright light emitting diodes intersect and are distributed on its end face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201746349U CN201294032Y (en) | 2008-10-28 | 2008-10-28 | Fire acousto-optic alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201746349U CN201294032Y (en) | 2008-10-28 | 2008-10-28 | Fire acousto-optic alarm |
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| Publication Number | Publication Date |
|---|---|
| CN201294032Y true CN201294032Y (en) | 2009-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008201746349U Expired - Fee Related CN201294032Y (en) | 2008-10-28 | 2008-10-28 | Fire acousto-optic alarm |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106255022A (en) * | 2016-08-23 | 2016-12-21 | 蒋寅 | The electroacoustic assembly of a kind of piezoelectricity low frequency big dB value and apply its piezoelectric loudspeaker |
| CN106683364A (en) * | 2016-11-25 | 2017-05-17 | 华京君 | Apparatus for testing endurance of blaze alarm |
| CN107833412A (en) * | 2017-11-10 | 2018-03-23 | 深圳市泛海三江电子股份有限公司 | A kind of acoustooptic alarm |
| CN112735366A (en) * | 2020-12-24 | 2021-04-30 | 青岛鼎信通讯消防安全有限公司 | PWM (pulse-width modulation) variable-frequency sound driving device for automatic fire alarm system and design method |
| CN114140956A (en) * | 2021-12-02 | 2022-03-04 | 深圳市源立信照明科技有限公司 | Protection warning circuit |
-
2008
- 2008-10-28 CN CNU2008201746349U patent/CN201294032Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106255022A (en) * | 2016-08-23 | 2016-12-21 | 蒋寅 | The electroacoustic assembly of a kind of piezoelectricity low frequency big dB value and apply its piezoelectric loudspeaker |
| WO2018036114A1 (en) * | 2016-08-23 | 2018-03-01 | 蒋寅 | Piezoelectric low-frequency/high db electroacoustic assembly and piezoelectric speaker applying same |
| CN106255022B (en) * | 2016-08-23 | 2018-08-28 | 常州富鸿达电子有限公司 | A kind of electroacoustic component of the big decibel value of piezoelectricity low frequency and apply its piezoelectric loudspeaker |
| CN106683364A (en) * | 2016-11-25 | 2017-05-17 | 华京君 | Apparatus for testing endurance of blaze alarm |
| CN107833412A (en) * | 2017-11-10 | 2018-03-23 | 深圳市泛海三江电子股份有限公司 | A kind of acoustooptic alarm |
| CN112735366A (en) * | 2020-12-24 | 2021-04-30 | 青岛鼎信通讯消防安全有限公司 | PWM (pulse-width modulation) variable-frequency sound driving device for automatic fire alarm system and design method |
| CN112735366B (en) * | 2020-12-24 | 2022-07-26 | 青岛鼎信通讯消防安全有限公司 | PWM (pulse-width modulation) variable-frequency sound driving device for automatic fire alarm system and design method |
| CN114140956A (en) * | 2021-12-02 | 2022-03-04 | 深圳市源立信照明科技有限公司 | Protection warning circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090819 Termination date: 20171028 |