CN210573300U - Buzzer gradual-sounding control circuit and fire detection alarm - Google Patents
Buzzer gradual-sounding control circuit and fire detection alarm Download PDFInfo
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- CN210573300U CN210573300U CN201921687848.0U CN201921687848U CN210573300U CN 210573300 U CN210573300 U CN 210573300U CN 201921687848 U CN201921687848 U CN 201921687848U CN 210573300 U CN210573300 U CN 210573300U
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Abstract
The utility model discloses a buzzer gradual-sounding control circuit and fire detection alarm. The buzzer gradual-sounding control circuit comprises: the device comprises a controller, a matching module, a switching module, a power supply module and a buzzer module; the controller outputs an gradually-sounding waveform signal and a buzzer feedback electrode control signal, the matching module enhances the gradually-sounding waveform signal, the switching module cuts off a self-excited oscillation feedback electrode in the buzzer module according to the buzzer feedback electrode control signal, and the gradually-sounding waveform signal controls the buzzer module to realize sound gradual sounding; the switching module is connected with a self-oscillation feedback electrode in the buzzer module according to the buzzer feedback electrode control signal and controls the buzzer module to work in a self-oscillation state. The utility model discloses can make fire detection alarm when the warning is exported, realize the warning of gradually sounding, reduce the high decibel and to the frightening of people, promote user experience.
Description
Technical Field
The utility model relates to a fire control technical field, in particular to buzzer gradual response control circuit and fire detection alarm.
Background
The fire detection alarm is particularly important when the fire prevention work is realized. The working principle of most buzzer alarms is as follows: when the sensor detects that the smoke concentration reaches a certain threshold value, the controller controls the fire detection alarm to give out alarm sound. When the buzzer fire detection alarm works, the sound emitted by the buzzer is sharp and abrupt. However, when a fire occurs, the high decibel sound emitted by the buzzer is more likely to disturb the mind of a person, causing the person to be frightened, even to cause irreversible physical damage to the eardrum of the person. When the alarm sound of the buzzer is gradually sounded, people can be cooled and calm slightly. Therefore, the invention of a buzzer sound gradually-sounding control circuit capable of accurately realizing the sound gradually-sounding of a buzzer has become a problem to be solved urgently by technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem provide a buzzer gradual sound control circuit and fire detection alarm ware that can accurately realize buzzer gradual sound.
On the one hand, the utility model discloses a buzzer gradual response control circuit, include: the device comprises a controller, a matching module, a switching module, a buzzer module and a power supply module; the controller is electrically connected with the matching module, the matching module is electrically connected with the switching module, the switching module is electrically connected with the buzzer module and the controller, and the buzzer module is electrically connected with the power supply module; the controller outputs an gradually-sounding waveform signal and an gradually-sounding control signal, the matching module enhances the gradually-sounding waveform signal, the switching module cuts off a feedback electrode of self-oscillation in the buzzer module, and the gradually-sounding waveform signal controls the buzzer module to realize sound gradually-sounding; the switching module is connected with a self-oscillation feedback electrode in the buzzer module and controls the buzzer module to work in a self-oscillation state.
Preferably, the buzzer gradual-sounding control circuit further comprises a power supply voltage adjusting module; the power supply voltage adjusting module is electrically connected with the power supply module and the buzzer module, and the sound of the buzzer in the buzzer module is controlled by adjusting the partial pressure of the power supply voltage adjusting module.
Preferably, the buzzer gradual-sounding control circuit further comprises a buzzer switch control module; the buzzer switch control module is electrically connected with the buzzer module and is used for controlling the opening and closing of the buzzer module.
Preferably, the buzzer module comprises a driver, a buzzer, a first resistor, a second resistor and a first capacitor; the first end of the buzzer is electrically connected with the first end of the driver and the first end of the first resistor, the second end of the buzzer is electrically connected with the first end of the first capacitor and the second end of the driver, the third end of the buzzer is electrically connected with the first end of the second resistor, and the second end of the first resistor, the second end of the second resistor and the second end of the first capacitor are electrically connected with the switching module.
Preferably, the switching module includes a first triode, a third resistor and a fourth resistor; the first end of the third resistor is electrically connected with the third end of the driver, the second end of the third resistor is electrically connected with the first end of the fourth resistor and the collector of the first triode, the second end of the fourth resistor is electrically connected with the buzzer module, the base of the first triode is electrically connected with the controller, and the emitter of the first triode is grounded.
Preferably, the power supply voltage adjusting module includes a first field effect transistor, a second triode, a fifth resistor, a sixth resistor, a seventh resistor, and an eighth resistor; the source electrode of the first field effect transistor is electrically connected with the power supply module and the first end of the fifth resistor, the drain electrode of the first field effect transistor is electrically connected with the fourth end of the driver, the grid electrode of the first field effect transistor is respectively electrically connected with the second end of the fifth resistor and the first end of the sixth resistor, the second end of the sixth resistor is electrically connected with the collector electrode of the second triode, the base electrode of the second triode is electrically connected with the first end of the seventh resistor and the first end of the eighth resistor, the second end of the seventh resistor is electrically connected with the fifth end of the driver, the second end of the eighth resistor is grounded, and the emitting electrode of the second triode is grounded.
Preferably, the buzzer switch control module comprises a second field effect transistor; the drain electrode of the second field effect transistor is electrically connected with the power supply module, the grid electrode of the second field effect transistor is electrically connected with the fifth end of the driver, and the source electrode of the second field effect transistor is grounded.
On the other hand, the utility model also discloses a fire detection alarm, including the first aspect buzzer gradually ring control circuit.
The utility model discloses a buzzer gradual-ringing control circuit and fire detection alarm have following beneficial effect: the buzzer gradual-sounding control circuit comprises a controller, a matching module, a switching module, a buzzer module and a power supply module; the controller is electrically connected with the matching module, the matching module is electrically connected with the switching module, the switching module is electrically connected with the buzzer module and the controller, and the buzzer module is electrically connected with the power supply module; the controller outputs an gradually-sounding waveform signal and an gradually-sounding control signal, the matching module enhances the gradually-sounding waveform signal, the switching module cuts off a feedback electrode of self-oscillation in the buzzer module, and the gradually-sounding waveform signal controls the buzzer module to realize sound gradually-sounding; the switching module is connected with a self-oscillation feedback electrode in the buzzer module and controls the buzzer module to work in a self-oscillation state. When the buzzer module works in a self-excited oscillation state, the oscillation frequency of the buzzer is close to the resonance frequency point of the buzzer, and the sound emitting frequency is stable. Therefore, when a fire disaster occurs, the fire detection alarm emits sound gradually, and emits stable alarm sound after the preset time, thereby avoiding the sudden high decibel sound from disturbing the mind of the trapped people, and reducing the damage to the eardrum. The utility model has the advantages of control is accurate and promote user experience.
Drawings
Fig. 1 is a schematic block diagram of a buzzer gradual-sounding control circuit according to a preferred embodiment of the present invention.
Fig. 2 is a schematic block diagram of a buzzer gradual-sounding control circuit according to another preferred embodiment of the present invention.
Fig. 3 is a circuit diagram of the matching module, the switching module, the power module and the buzzer module of the buzzer gradually-sounding control circuit according to the preferred embodiment of the present invention;
fig. 4 is a circuit diagram of a power supply voltage adjusting module of the buzzer gradually-sounding control circuit according to the preferred embodiment of the present invention;
fig. 5 is a circuit diagram of the buzzer switch control module of the buzzer gradual-sound control circuit according to the preferred embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples. It should be noted that, if there is no conflict, the embodiments and various features in the embodiments of the present invention may be combined with each other, and all are within the scope of the present invention.
Example one
Referring to fig. 1, the present invention discloses a buzzer sound gradually-controlling circuit to realize the buzzer sound gradually-controlling function. The buzzer gradual-sounding control circuit comprises: the buzzer gradual-sounding control circuit comprises a controller 1, a matching module 2, a switching module 3, a buzzer module 4 and a power supply module 5; the controller 1 is electrically connected with the matching module 2, the matching module 2 is electrically connected with the switching module 3, the switching module 3 is electrically connected with the buzzer module 5 and the controller 1, and the buzzer module 5 is electrically connected with the power supply module 4; the controller 1 outputs an gradually-sounding waveform signal and an gradually-sounding control signal, the matching module 2 enhances the gradually-sounding waveform signal, the switching module 3 cuts off a feedback electrode of self-oscillation in the buzzer module, and the gradually-sounding waveform signal controls the buzzer module 5 to realize sound gradually-sounding; the switching module 3 is connected with a self-oscillation feedback electrode in the buzzer module 5 and controls the buzzer module 5 to work in a self-oscillation state. When the buzzer module 5 works in a self-excited oscillation state, the oscillation frequency of the buzzer is close to the resonance frequency point of the buzzer, and the sound emitting frequency is stable. Therefore, when a fire disaster happens, the fire detection alarm emits gradual sound, and emits stable alarm sound after the preset time, thereby avoiding the sudden high decibel sound from disturbing the mind of the trapped people and reducing the damage to the eardrum. The utility model has the advantages of control accuracy is high and promote user experience.
Specifically, in this embodiment, the controller includes an MCU (micro controller Unit, also called a Single Chip Microcomputer) or a Single Chip Microcomputer). It is understood that, in another preferred embodiment, the controller may be a PLC controller or an FPGA, and the structure and model of the controller are not specifically limited herein.
Preferably, the buzzer gradual-sounding control circuit further comprises a power supply voltage adjusting module 6; the power supply voltage adjusting module is electrically connected with the power supply module 5 and the buzzer module 4, and the magnitude of the sound of the buzzer in the buzzer module 4 is controlled by adjusting the partial pressure of the power supply voltage adjusting module 6.
Preferably, the buzzer gradual-sounding control circuit further comprises a buzzer switch control module 7; the buzzer switch control module 7 is electrically connected with the buzzer module 4, and the buzzer switch control module 7 is used for controlling the opening and closing of the buzzer module 4. Therefore, the utility model is reliable in control. It will be appreciated that in another preferred embodiment, the buzzer reverberation control module may not be provided.
Preferably, referring to fig. 3, the buzzer module 5 includes a driver U2, a buzzer J1, a first resistor R38, a second resistor R39, and a first capacitor C12; a first end beepm of the buzzer J1 is electrically connected to a first end OUTA of the driver U2 and a first end of the first resistor R38, a second end BEEPs of the buzzer J1 is electrically connected to a first end of the first capacitor C12 and a second end OUTB of the driver U2, a third end beepf of the buzzer J1 is electrically connected to a first end of the second resistor R39, and a second end of the first resistor R38, a second end of the second resistor R39 and a second end of the first capacitor C12 are electrically connected to the switching module 3. It can be understood that the third end beepf of the buzzer J1 is a self-oscillating feedback pole of the buzzer J1, and when the buzzer J1 operates in a self-oscillating state, the operating frequency of the feedback pole is equal to the resonance frequency point of the buzzer J1. When the buzzer works on the resonance frequency point, the sound emitted by the buzzer tends to be stable and is in the maximum sound pressure state.
Preferably, the switching module 3 includes a first transistor Q14, a third resistor R42 and a fourth resistor R43; the first end of the third resistor R42 is electrically connected with the third end INA of the driver U2, the second end of the third resistor R42 is electrically connected with the first end of the fourth resistor R43 and the collector of the first triode Q14, the second end of the fourth resistor R43 is electrically connected with the buzzer module 5, the base of the first triode Q14 is electrically connected with the controller U2, and the emitter of the first triode Q14 is grounded. In another preferred embodiment, the first transistor Q14 may be a field effect transistor. The third resistor and the fourth resistor have a voltage division function.
In another preferred embodiment, the switching module 3 further includes ninth and tenth resistors R44 and R45 and a first diode D1. A first end of the ninth resistor R44 is electrically connected to a sixth end of the controller 1, and the sixth end of the controller 1 is configured to output the ring control signal. The second end of the ninth resistor R44 is electrically connected to the first end of the tenth resistor R45 and the base of the first transistor Q14, and the second end of the tenth resistor R45 is grounded. A first terminal of the first diode D1 is electrically connected with the third resistor R42, and a second terminal of the first diode D1 is electrically connected with the matching module 2. The first diode is used for preventing voltage reflux of the switching module. It can be understood that the controller 1 outputs a high-level control signal to control the first transistor Q14 to pull down the intersection of the third resistor R42 and the fourth resistor R43, and to turn off the self-oscillating feedback terminal of the buzzer J1. Therefore, the 1 outputs the sound-fading waveform signal, and the sound-fading function is realized by adjusting the pulse width of the sound-fading waveform signal. After the gradual sound is output for the preset time, the controller 1 outputs a gradual sound low level control signal, the feedback electrode of the self-oscillation of the buzzer J1 is switched on, and the output of the gradual sound waveform signal is stopped, so that the buzzer J1 works on a resonance frequency point, and the sound tends to be stable and is in the maximum sound pressure state. Therefore, the buzzer gradual-sounding control circuit has accurate control and high reliability.
Preferably, referring to fig. 4, the power voltage adjustment module 6 includes a first fet Q5, a second transistor Q12, a fifth resistor R25, a sixth resistor R30, a seventh resistor R37, and an eighth resistor R40; a source of the first field effect transistor Q5 is electrically connected to the power module 4 and a first end of the fifth resistor R25, a drain of the first field effect transistor Q5 is electrically connected to a fourth end of the driver U2, a gate of the first field effect transistor Q5 is electrically connected to a second end of the fifth resistor R25 and a first end of the sixth resistor R30, respectively, a second end of the sixth resistor R30 is electrically connected to a collector of the second triode Q12, a base of the second triode Q12 is electrically connected to a first end of the seventh resistor R37 and a first end of the eighth resistor R40, a second end of the seventh resistor R37 is electrically connected to a fifth end of the driver, a second end of the eighth resistor R40 is grounded, and an emitter of the second triode Q12 is grounded. In another preferred embodiment, the second transistor may be configured as a field effect transistor. It can be understood that, the supply voltage adjusting module 6 controls the sound of the buzzer by adjusting the voltage division in the supply voltage module 6, thereby improving the user experience.
Preferably, referring to fig. 5, the buzzer switch control module 7 includes a second field effect transistor Q6; the drain of the second fet Q6 is electrically connected to the power module 4, the gate of the second fet Q6 is electrically connected to the fifth terminal of the driver U2, and the source of the second fet Q6 is grounded.
In another preferred embodiment, the buzzer switch control module 7 further includes an eleventh resistor R21, a twelfth resistor R32 and a thirteenth resistor R36. The drain of the second fet Q6 is electrically connected to the power module 4 through the eleventh resistor R21, the first end of the twelfth resistor R32 and the first end of the thirteenth resistor R36 are electrically connected to the gate of the second fet Q6, the second end of the twelfth resistor R32 is electrically connected to the fifth end of the driver U2, and the second end of the thirteenth resistor R36 is grounded.
Preferably, the matching module 2 includes a third transistor Q11, a fourth transistor Q13, a sixteenth resistor R26, a seventeenth resistor R31, an eighteenth resistor R33, a nineteenth resistor R59, and a twentieth resistor R41. An emitter of the third triode Q11 is electrically connected to a drain of the first field effect transistor Q5 and a first end of the sixteenth resistor R26, a collector of the third triode Q11 is electrically connected to a first end of the seventeenth resistor R31, a second end of the seventeenth resistor R31 is electrically connected to the first diode, a second end of the sixteenth resistor R33 is electrically connected to a base of the third triode Q11 and a first end of the eighteenth resistor R33, a second end of the eighteenth resistor R33 is electrically connected to a collector of the fourth triode Q13, a first end of the nineteenth resistor R59 and a first end of the twentieth resistor R41 are electrically connected to a base of the fourth triode Q13, a second end of the nineteenth resistor R59 is configured to receive the ringing waveform signal, and a second end of the twentieth resistor R41 is grounded. The matching module plays a role in enhancing control on the output of the gradually-sounding waveform signal.
Preferably, the power module 4 includes a twenty-first resistor R17, a twenty-second resistor R20, a first capacitor C5, a second capacitor C6, a third capacitor C7, a fourth capacitor C20, a fifth capacitor C8, a first inductor L1, and a second diode D2. A first end of the first capacitor C5 is electrically connected to the first end of the first inductor L1 and the power input end, a second end of the first capacitor C5 is grounded, a second end of the first inductor L1 is electrically connected to the sixth end VIN of the driver and the first end of the second diode D2, a second end of the second diode D2 is electrically connected to the first end of the twenty-first resistor R17 and the first ends of the second capacitor and the third capacitor C7, a second end of the twenty-first resistor R17 is electrically connected to the first end of the twenty-second resistor R20 and the seventh end FB of the driver, a second end of the twenty-second resistor R20 is grounded, a second end of the third capacitor C7 is grounded, and a second end of the third capacitor C7 is grounded. The first end of the fourth capacitor C20 and the first end of the fifth capacitor C8 are electrically connected to the eighth terminal VCC of the driver U2, the second end of the fourth capacitor C20 is grounded, and the second end of the fifth capacitor C8 is grounded.
Example two
The utility model also discloses a fire detection alarm, it includes the promotion control accuracy and protects people's eardrum undamaged bee calling organ gradual response control circuit under the trapped condition, bee calling organ gradual response control circuit is above arbitrary embodiment bee calling organ gradual response control circuit. Since the buzzer gradually-sounding control circuit of this embodiment has the same structure as the buzzer gradually-sounding control circuit of any of the above embodiments, the same technical effects are achieved, and the structure thereof is not described herein again.
In conclusion, because the utility model discloses a buzzer gradual response control circuit includes: the buzzer gradual-sounding control circuit comprises a controller 1, a matching module 2, a switching module 3, a buzzer module 4 and a power supply module 5; the controller 1 is electrically connected with the matching module 2, the matching module 2 is electrically connected with the switching module 3, the switching module 3 is electrically connected with the buzzer module 5 and the controller 1, and the buzzer module 5 is electrically connected with the power supply module 4; the controller 1 outputs an gradually-sounding waveform signal and an gradually-sounding control signal, the matching module 2 enhances the gradually-sounding waveform signal, the switching module 3 cuts off a feedback electrode of self-oscillation in the buzzer module, and the gradually-sounding waveform signal controls the buzzer module 5 to realize sound gradually-sounding; the switching module 3 is connected with a self-oscillation feedback electrode in the buzzer module 5 and controls the buzzer module 5 to work in a self-oscillation state. When the buzzer module 5 works in a self-excited oscillation state, the oscillation frequency of the buzzer is close to the resonance frequency point of the buzzer, and the sound emitting frequency is stable. Therefore, when a fire disaster happens, the fire detection alarm emits gradual sound, and emits stable alarm sound after the preset time, thereby avoiding the sudden high decibel sound from disturbing the mind of the trapped people and reducing the damage to the eardrum. The utility model has the advantages of control accuracy is high and promote user experience.
The buzzer gradual-sounding control circuit and the fire detection alarm provided by the utility model are introduced in detail, and the principle and the implementation mode of the utility model are explained by applying specific examples, and the explanation of the above embodiments is only used for helping to understand the method and the core idea of the utility model; meanwhile, to the general technical personnel in this field, according to the utility model discloses an idea, all can have the change part on concrete implementation and application scope, to sum up, this description content only is the utility model discloses an embodiment, does not consequently restrict the utility model discloses a patent scope, all utilize the equivalent structure or the equivalent flow transform that the content of the description and the attached drawing did, or directly or indirectly use in other relevant technical fields, all the same reason is included in the utility model discloses a patent protection scope. And should not be construed as limiting the invention.
Claims (8)
1. A buzzer gradual-sounding control circuit is characterized by comprising: the device comprises a controller, a matching module, a switching module, a buzzer module and a power supply module; the controller is electrically connected with the matching module, the matching module is electrically connected with the switching module, the switching module is electrically connected with the buzzer module and the controller, and the buzzer module is electrically connected with the power supply module; the controller outputs an gradually-sounding waveform signal and an gradually-sounding control signal, the matching module enhances the gradually-sounding waveform signal, the switching module cuts off a feedback electrode of self-oscillation in the buzzer module, and the gradually-sounding waveform signal controls the buzzer module to realize sound gradually-sounding; the switching module is connected with a self-oscillation feedback electrode in the buzzer module and controls the buzzer module to work in a self-oscillation state.
2. The buzzer reverberation control circuit of claim 1, further comprising a power supply voltage adjustment module; the power supply voltage adjusting module is electrically connected with the power supply module and the buzzer module, and the sound of the buzzer in the buzzer module is controlled by adjusting the partial pressure of the power supply voltage adjusting module.
3. The buzzer reverberation control circuit of claim 2, further comprising a buzzer switch control module; the buzzer switch control module is electrically connected with the buzzer module and is used for controlling the opening and closing of the buzzer module.
4. The buzzer gradual response control circuit of claim 3, wherein the buzzer module comprises a driver, a buzzer, a first resistor, a second resistor and a first capacitor; the first end of the buzzer is electrically connected with the first end of the driver and the first end of the first resistor, the second end of the buzzer is electrically connected with the first end of the first capacitor and the second end of the driver, the third end of the buzzer is electrically connected with the first end of the second resistor, and the second end of the first resistor, the second end of the second resistor and the second end of the first capacitor are electrically connected with the switching module.
5. The buzzer reverberation control circuit of claim 4, wherein the switching module comprises a first triode, a third resistor and a fourth resistor; the first end of the third resistor is electrically connected with the third end of the driver, the second end of the third resistor is electrically connected with the first end of the fourth resistor and the collector of the first triode, the second end of the fourth resistor is electrically connected with the buzzer module, the base of the first triode is electrically connected with the controller, and the emitter of the first triode is grounded.
6. The buzzer gradual response control circuit of claim 5, wherein the power supply voltage adjustment module comprises a first field effect transistor, a second triode, a fifth resistor, a sixth resistor, a seventh resistor and an eighth resistor; the source electrode of the first field effect transistor is electrically connected with the power supply module and the first end of the fifth resistor, the drain electrode of the first field effect transistor is electrically connected with the fourth end of the driver, the grid electrode of the first field effect transistor is respectively electrically connected with the second end of the fifth resistor and the first end of the sixth resistor, the second end of the sixth resistor is electrically connected with the collector electrode of the second triode, the base electrode of the second triode is electrically connected with the first end of the seventh resistor and the first end of the eighth resistor, the second end of the seventh resistor is electrically connected with the fifth end of the driver, the second end of the eighth resistor is grounded, and the emitting electrode of the second triode is grounded.
7. The buzzer reverberation control circuit of claim 6, wherein the buzzer switch control module comprises a second field effect transistor; the drain electrode of the second field effect transistor is electrically connected with the power supply module, the grid electrode of the second field effect transistor is electrically connected with the fifth end of the driver, and the source electrode of the second field effect transistor is grounded.
8. A fire detection alarm comprising a buzzer fading control circuit as claimed in any one of claims 1 to 7.
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| CN201921687848.0U CN210573300U (en) | 2019-10-10 | 2019-10-10 | Buzzer gradual-sounding control circuit and fire detection alarm |
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| CN201921687848.0U CN210573300U (en) | 2019-10-10 | 2019-10-10 | Buzzer gradual-sounding control circuit and fire detection alarm |
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| CN210573300U true CN210573300U (en) | 2020-05-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110543130A (en) * | 2019-10-10 | 2019-12-06 | 深圳市泛海三江电子股份有限公司 | Buzzer gradual-sounding control circuit and control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110543130A (en) * | 2019-10-10 | 2019-12-06 | 深圳市泛海三江电子股份有限公司 | Buzzer gradual-sounding control circuit and control method |
| CN110543130B (en) * | 2019-10-10 | 2024-03-19 | 深圳市高新投三江电子股份有限公司 | Buzzer gradually-sounding control circuit and control method |
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Address after: 518000 the three floor of the new world apartment, Nanshan Avenue, Nanshan District, Shenzhen, Guangdong (for office only). Patentee after: Shenzhen hi tech investment Sanjiang Electronics Co.,Ltd. Address before: 518000 the three floor of the new world apartment, Nanshan Avenue, Nanshan District, Shenzhen, Guangdong (for office only). Patentee before: SHENZHEN FANHAI SANJIANG ELECTRONICS Co.,Ltd. |