CN218497635U - Sound detection circuit based on self-feedback of sounder and alarm - Google Patents
Sound detection circuit based on self-feedback of sounder and alarm Download PDFInfo
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- CN218497635U CN218497635U CN202222311625.2U CN202222311625U CN218497635U CN 218497635 U CN218497635 U CN 218497635U CN 202222311625 U CN202222311625 U CN 202222311625U CN 218497635 U CN218497635 U CN 218497635U
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Abstract
The utility model is suitable for an alarm technical field provides a sound detection circuitry and alarm based on vocal ware is from taking feedback, and sound detection circuitry includes: the device comprises a power supply module, a sound driving module and a control module which are connected with the power supply module, and a feedback signal detection module which is connected with the control module and the sound driving module, wherein the sound driving module is connected with the control module; under the working state, the control module sends out a driving signal to drive the sound driving module to generate a sound signal, a feedback signal is generated on a feedback pin of a sound generating device in the sound driving module, the feedback signal detection module converts the feedback signal into a target type signal and then inputs the target type signal into the control module, and the target type signal is used for the control module to judge the sound state. This application combines feedback signal detection module and the self-contained feedback pin realization of sound production device to the self-checking of alarm sound production device sound state, can promote sound production device sound detection efficiency, practices thrift the human cost.
Description
Technical Field
The utility model belongs to the technical field of the alarm, especially, relate to a sound detection circuitry and alarm based on vocal ware is from taking feedback.
Background
Alarms are commonly used in security and other fields, and are equipped in various places including residential areas, office areas, electrical appliances, vehicles and the like. In order to ensure the normal work of the alarm, the alarm needs to be manually and regularly subjected to sound detection, so that the alarm can be ensured to be in a normal working state. Particularly, in some fire sites, if the sound of the alarm device is abnormal and the alarm function is lost, the alarm device cannot arrive at the fire site in the first time, and great loss is brought. However, the periodic detection method consumes a lot of labor cost, and the detection efficiency is low.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides a sound detection circuitry based on vocal ware is from taking feedback aims at realizing sound self-checking through the circuit, improves detection efficiency, practices thrift the human cost.
The embodiment of the utility model provides a realize like this, through providing a sound detection circuit based on the vocal ware is from taking feedback, power module, sound drive module, feedback signal detection module and control module, wherein, include the vocal ware in the sound drive module;
the power supply module is respectively connected with the sound driving module and the control module;
the control module is respectively connected with the sound driving module and the feedback signal detection module;
the feedback signal detection module is connected with a feedback pin of the sounding device in the sound driving module;
in a working state, the control module sends out a driving signal to drive the sound driving module to generate a sound signal and generate a feedback signal on a feedback pin of the sound generating device in the sound driving module, the feedback signal detection module converts the feedback signal into a target type signal and then inputs the target type signal into the control module, and the target type signal is used for the control module to judge the sound state.
Still further, still include the instruction module, the instruction module is connected the control module.
Furthermore, the power module comprises a battery pack, a control switch, a first capacitor and a second capacitor;
when the control switch is switched on, the battery pack is connected with the control switch in series to form a loop, the first capacitor and the second capacitor are connected to the loop in parallel, and the loop at one end of the control switch is connected with the control module and the sound driving module to output power supply voltage.
Furthermore, the power module further comprises a TVS diode and a third capacitor, the TVS diode is connected in parallel to two ends of the battery pack, and the third capacitor forms a loop with the battery pack and the control switch.
Furthermore, the sound driving module further comprises an autotransformer, a first triode and a first resistor, and the sound generating device comprises a buzzer;
the first end of the buzzer is connected with one end of the autotransformer, the second end of the buzzer is connected with the feedback signal detection module, the third end of the buzzer is connected with the other end of the autotransformer, and the second end of the buzzer is a feedback pin;
the collector electrode of the first triode is connected with the autotransformer, the base electrode of the first triode is connected with the control module after being connected with the first resistor in series, and the emitting electrode of the first triode is grounded.
Furthermore, the sound driving module further comprises a second resistor and a fourth capacitor;
after the fourth capacitor is connected with the second resistor in parallel, one end of the fourth capacitor is connected with the base electrode of the first triode, the other end of the fourth capacitor is grounded, and meanwhile the second resistor is connected with the first resistor in series.
Furthermore, the feedback signal detection module comprises a third resistor, a fourth resistor, a fifth resistor, a sixth resistor and a second triode;
one end of the third resistor is connected with the feedback pin of the buzzer, the other end of the third resistor is connected with the fifth resistor in series and is connected to the base electrode of the second triode, and the third resistor is connected with the fourth resistor in series and is connected to the emitting electrode of the second triode and is grounded;
one end of the sixth resistor is used for inputting power voltage, the other end of the sixth resistor is connected with the collector electrode of the second triode, and the target type signal is input into the control module from the collector electrode of the second triode.
Furthermore, the feedback signal detection module further comprises a seventh resistor, a fifth capacitor and a sixth capacitor;
the seventh resistor and the fifth capacitor are connected in parallel between the base electrode and the emitter electrode of the second triode, and the sixth capacitor is connected between the collector electrode and the emitter electrode of the second triode.
Still further, the indication module comprises an eighth resistor, and a light emitting diode connected in series with the eighth resistor;
one end of the eighth resistor is connected to a power supply voltage, and one end of the light emitting diode is connected to the control module.
The embodiment of the utility model provides an alarm is still provided, including arbitrary embodiment a sound detection circuitry based on vocal ware is from taking feedback.
The utility model discloses the beneficial effect who reaches, the utility model provides a sound detection circuitry based on sounder is from taking feedback, because increase feedback signal detection module in the vocal part circuit of alarm, send drive signal drive sound drive module through control module and send the acoustic signal, produce feedback signal at the feedback pin of sounder during the acoustic signal, gather feedback signal and convert feedback signal into target type signal input to control module through feedback signal detection module, compare target type signal and preset signal threshold value through control module, judge the sounder sound state of alarm according to the comparative result, thereby realize the self-checking of alarm sound. Therefore, the sound detection efficiency of the sound production device in the alarm can be improved, and a large amount of labor cost is saved.
Drawings
Fig. 1 is a schematic diagram of a circuit module of a sound detection circuit based on feedback from a sound generator according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a power module according to an embodiment of the present invention;
fig. 3 is a circuit connection diagram of the sound driving module and the feedback signal detecting module according to an embodiment of the present invention;
fig. 4 is a circuit connection diagram of the indication module and the control module according to an embodiment of the present invention;
the device comprises a power module 1, a sound driving module 2, a feedback signal detection module 3, a control module 4, a control module 5 and an indication module.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
According to the sound self-checking alarm device, the feedback signal detection module is additionally arranged in the sound generation part circuit of the alarm device, the control module sends the driving signal to drive the sound driving module to send the sound signal, the feedback signal is generated at the feedback pin of the sound generation device when the sound signal is sent out, the feedback signal is collected through the feedback signal detection module and converted into the target type signal to be input into the control module, the target type signal is compared with the preset signal threshold value through the control module, the sound generation device sound state of the alarm device is judged according to the comparison result, and therefore the sound self-checking of the alarm device is achieved. Therefore, the sound detection efficiency of the sound production device in the alarm can be improved, and a large amount of labor cost is saved.
Example one
Referring to fig. 1, fig. 1 is a schematic diagram of a circuit module of a sound detection circuit based on a self-contained feedback of a sound generator according to an embodiment of the present invention. A sound detection circuit based on self-contained feedback of a sound generator comprises: the device comprises a power supply module 1, a sound driving module 2, a feedback signal detection module 3 and a control module 4, wherein the sound driving module 2 comprises a sound generating device;
the power supply module 1 is respectively connected with the sound driving module 2 and the control module 4;
the control module 4 is respectively connected with the sound driving module 2 and the feedback signal detection module 3;
the feedback signal detection module 3 is connected with a feedback pin of a sound production device in the sound driving module 2;
in a working state, the control module 4 sends out a driving signal to drive the sound driving module 2 to generate a sound signal, and generates a feedback signal on a feedback pin of a sound generating device in the sound driving module 2, the feedback signal detection module 3 converts the feedback signal into a target type signal and then inputs the target type signal into the control module 4, and the target type signal is used for the control module 4 to judge a sound state.
The power module 1 is connected to the control module 4 and the sound driving module 2, and is configured to provide a power voltage VDD for the control module 4 and to drive the sound generating device to generate a sound signal and provide the power voltage VDD for the sound driving module 2. Wherein, the supplied power voltage VDD is 3V.
The sound driving module 2 may generate the sound signal when the control module 4 inputs the driving signal to the sound driving module 2 at a timing, and the interval time of the timing driving may be 24 hours, 1 week, 2 weeks, and the like.
The feedback signal detection module 3 is connected with a feedback pin of a sound generating device in the sound driving module 2, when the control module 4 sends a driving signal at regular time to drive the sound generating device in the sound driving module 2 to generate a sound signal, the feedback pin generates a feedback signal and inputs the feedback signal into the feedback signal detection module 3, and the feedback signal detection module can perform signal type conversion on the feedback signal after detecting the feedback signal to obtain a target type signal, and inputs the target type signal into the control module 4 to be compared with a preset signal threshold value for judgment. The target type signal includes, but is not limited to, a voltage signal and a frequency signal.
In particular, the control module 4 may comprise a timer and a comparator. The sound generating device in the sound driving module 2 can be driven to generate sound signals at regular time based on a time interval preset by a timer, when the sound signals are generated, feedback signals are input into the feedback signal detection module 3 through a feedback pin of the sound generating device, after the feedback signal detection module 3 detects that the feedback signals are input, signal type conversion can be carried out on the feedback signals to obtain voltage signals/frequency signals, the voltage signals/frequency signals are input into the control module 4, and the voltage signals/frequency signals obtained through conversion are compared with a preset signal threshold value through a comparator arranged in the control module 4. If the preset signal threshold is met, the sound of the sound production device in the alarm can be judged to be normal. Of course, if the preset signal threshold is not met, the sound of the sound generating device in the alarm can be judged to be abnormal. The comparison and determination in the control module 4 may include frequency determination or voltage signal comparison and determination. The normal sound of the alarm device can comprise that the sound production device does not produce sound, the sound is too small, the sound is too large and the like. It should be noted that the function of the control module 4 for sending out the driving signal to drive the sound driving module 2 to generate the sound signal, and the function of the control module 4 for judging the sound state of the sound generating device of the alarm according to the voltage signal/frequency signal can be implemented by the prior art.
The embodiment of the utility model provides an in, owing to increase feedback signal detection module 3 in the sound production part circuit of alarm, through control module 4 to sound drive module 2 input drive signal drive sound drive module 2 sound signal that sends, feedback signal detection module 3 can acquire feedback signal through being connected with the feedback pin of sound production device when sound signal sends, and convert feedback signal into target type signal input to control module 4, compare target type signal and preset signal threshold value through control module 4, judge the sound production device sound state of alarm according to the comparative result, thereby realize the self-checking of alarm sound, so, can promote the sound production device sound detection efficiency of alarm, practice thrift a large amount of human costs.
Example two
Based on the first embodiment, the second embodiment provides a sound detection circuit based on self-contained feedback of a sound generator, which further includes an indication module 5, and the indication module 5 is connected to the control module 4.
As shown in fig. 1, the alarm device may further include an indication module 5, where the indication module 5 may be configured to display a sound detection result of a sound generating device in the alarm device, and determine validity/invalidity (normality/abnormality) of sound detection of the sound generating device in the alarm device according to a state of an indicator. If the control module 4 determines that the sound of the sound generating device in the alarm is normal, the indication module 5 may be driven to generate a first indication signal. Of course, if the control module 4 determines that the sound of the sound generating device in the alarm is abnormal, the indication module 5 will be driven to generate the second indication signal. The first indication signal and the second indication signal may be different colors emitted by indication lamps in the indication module 5, and the detection result may be known more intuitively through the colors, for example: and if the detection result is that the sound of the buzzer in the alarm is normal, the indicator lamp displays green, and if the detection result is that the sound of the buzzer in the alarm is abnormal, the indicator lamp displays red.
In this embodiment, the indication module 5 is connected to the control module 4, and after the control module 4 makes a judgment result, the indication module 5 is driven to send a corresponding indication signal, which is beneficial to more intuitively observing a sound detection result of the alarm.
EXAMPLE III
Based on the first embodiment, the power module 1 provided in the third embodiment includes a battery pack, a control switch, a first capacitor, and a second capacitor;
when the control switch is switched on, the battery pack is connected in series with the control switch to form a loop, the first capacitor and the second capacitor are connected in parallel to the loop, and the loop at one end of the control switch is connected with the control module 4 and the sound driving module 2 to output power supply voltage.
Referring to fig. 2, fig. 2 is a circuit diagram of the power module provided in this embodiment. In fig. 2, the battery pack is BT1, the control switch is S1, the TVS diode is D1, the first capacitor is C1, the second capacitor is C2, and the third capacitor is C3. The capacitance values of the first capacitor C1, the second capacitor C2 and the third capacitor C3 may be 220uF, 100nf and 10nf, respectively, and the first capacitor C1 is a polar capacitor. Referring to fig. 4, the control module 4 includes a single chip microcomputer U1 with a model number of HT45F24A, and has a timing function.
As a possible embodiment, the power module 1 includes a battery BT1, a control switch S1, a first capacitor C1, and a second capacitor C2. The positive electrode of the battery BT1 is connected in series with the control switch S1 and then returns to the negative electrode of the battery BT 1. When the control switch S1 is connected with the circuit, the circuit is conducted, and the power supply module 1 works normally to provide power supply voltage VDD. Meanwhile, the first capacitor C1 and the second capacitor C2 are connected in parallel in a series loop formed by the battery BT1 and the control switch S1, the positive electrode of the first capacitor C1 is connected to the positive electrode of the battery BT1, and the negative electrode of the first capacitor C1 is connected to the negative electrode of the battery BT 1.
In this embodiment, the first capacitor C1 and the second capacitor C2 are connected in parallel in the voltage module for filtering, and the power module 1 can output a stable 3V power voltage VDD to the control module 4 and the sound driving module 2 through the voltage stabilizing filtering process.
As another possible embodiment, on the basis of including the battery BT1, the control switch S1, the first capacitor C1, and the second capacitor C2, the power module further includes a TVS diode D2 and a third capacitor C3, the TVS diode D2 is connected in parallel to two ends of the battery, and the third capacitor C3 forms a loop with the battery BT1 and the control switch S1.
The first capacitor C1, the second capacitor C2 and the third capacitor C3 are connected in parallel, so that ripples and noise caused by the voltage-stabilizing internal resistance in the TVS diode D2 can be reduced. The TVS diode D1 is a diode-type high-efficiency protection device, and utilizes the reverse breakdown working principle of a P-N junction to guide electrostatic high-voltage pulse into the ground, thereby protecting elements which are in the electric appliance and are sensitive to electrostatic plating. When the battery BT1 works normally to provide voltage, when the transient voltage exceeds the normal working voltage of the circuit, the TVS diode D1 generates avalanche, and provides an ultra-low power path for transient current, as a result, the transient current is led out through the TVS diode D1 to avoid a protected device, and before the voltage returns to a normal value, the protected loop keeps a cut-off voltage, and when the transient pulse is ended, the TVS diode D1 automatically returns to a high-resistance state, so that the loop of the whole power module 1 enters the normal voltage. The addition of the TVS diode D1 and the third capacitor C3 can make the power supply of the power module 1 more stable.
Example four
Based on the third embodiment, the sound driving module 2 provided in the fourth embodiment further includes an autotransformer, a first triode, and a first resistor, and the sound generating device includes a buzzer;
the first end of the buzzer is connected with one end of the autotransformer, the second end of the buzzer is connected with the feedback signal detection module, the third end of the buzzer is connected with the other end of the autotransformer, and the second end of the buzzer is a feedback pin;
the collector electrode of the first triode is connected with the autotransformer, the base electrode of the first triode is connected with the control module 4 after being connected with the first resistor in series, and the emitting electrode of the first triode is grounded.
Referring to fig. 3, fig. 3 is a circuit connection diagram of the sound driving module and the feedback signal detecting module provided in this embodiment. In fig. 3, the BUZZER is BUZZER1, the autotransformer is L1, the first triode is Q1, the fourth capacitor is C4, the first resistor is R1, and the second resistor is R2. Optionally, the inductance of the autotransformer L1 is 39mH, the first triode Q1 is 5551 type, and the resistances of the first resistor R1 and the second resistor R2 are 470 Ω and 47K Ω, respectively. Optionally, the sounding device may further include a buzzer, a speaker, or the like.
The power module 1 is connected to the first end of the BUZZER1 and the connection end of the autotransformer L1, and can provide a 3V power voltage for the sound driving module 2. The second end of the BUZZER1 is connected to the feedback signal detection module 3 as a feedback pin for inputting a feedback signal. The third end of the BUZZER is connected with the other end of the autotransformer L1 to form a loop, and the BUZZER BUZZER1 can be stabilized by connecting the autotransformer L1 in parallel to sound.
Specifically, a pin 1 of the single chip microcomputer U1 sends a driving signal PN _ BUZ (high level signal/low level signal) to the sound driving module 2 at a fixed time, controls the on-off state of the first triode Q1, and drives the BUZZER1 to send out a sound signal at a fixed time. When the base of the first triode Q1 receives a high level signal, the first triode Q1 is conducted, the current flows through the BUZZER BUZZER1 through the collector of the first triode Q1, the BUZZER BUZZER1 generates an acoustic signal, and at the moment, the feedback signal detection module 3 can detect a feedback signal generated at a feedback pin when the BUZZER BUZZER1 sounds. When the base electrode of the first triode Q1 receives a low level signal, the first triode Q1 is cut off, and the BUZZER BUZZER1 does not sound.
As another possible embodiment, in the case that the sound driving module 2 includes an autotransformer L1, a first triode Q1, and a first resistor R1, a second resistor R2, and a fourth capacitor C4 are further included; after the fourth capacitor C4 is connected with the second resistor R2 in parallel, one end of the fourth capacitor C is connected with the base electrode of the first triode Q1, the other end of the fourth capacitor C is grounded, and meanwhile the second resistor R2 and the first resistor R1 are connected in series.
The first resistor R1 and the second resistor R2 are connected in series at the base of the first triode Q1 to play a role in voltage division, and the fourth capacitor C4 and the second resistor R2 are connected in parallel at the base of the first triode to play a role in filtering. The second resistor R2 and the fourth capacitor C4 are added to make the operation of the sound driving module 2 more stable.
In this embodiment, the sound driving module 2 is connected to the single chip microcomputer U1, and the single chip microcomputer U1 sends a driving signal PN _ BUZ to the sound driving module 2 at regular time, so as to control the on/off of the first triode Q1. When first triode Q1 switches on, the electric current flows through BUZZER BUZZER1, BUZZER BUZZER1 sends acoustic signal, feedback signal that feedback signal detection module 3 detected BUZZER BUZZER1 and produced the acoustic signal time through the feedback pin input, can be with feedback signal conversion for target type signal input and compare with predetermineeing the signal threshold value in singlechip U1, judge the sound situation of sound production device based on the comparative result, thereby realize the sound timing self-checking ability, can improve the sound detection efficiency of sound production device, practice thrift the human cost.
EXAMPLE five
Based on the fourth embodiment, the feedback signal detection module 3 provided in the fifth embodiment includes a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, and a second triode;
one end of the third resistor is connected with a feedback pin of the buzzer, the other end of the third resistor is connected with a fifth resistor in series and is connected to a base electrode of the second triode, and the third resistor is connected with a fourth resistor in series and is connected to an emitting electrode of the second triode and is grounded;
one end of the sixth resistor is used for inputting power voltage, the other end of the sixth resistor is connected with a collector electrode of the second triode, the sixth capacitor is connected between the collector electrode and an emitter electrode of the second triode, and the target type signal is input into the control module from the collector electrode of the second triode.
With reference to fig. 3, the present embodiment takes the target type signal as the voltage signal as an example for description. The third resistor is R3, the fourth resistor is R4, the fifth resistor is R5, the sixth resistor is R6, the seventh resistor is R7, the fifth capacitor is C5, the sixth capacitor is C6, and the second triode is Q2. Optionally, the resistances of the third resistor R3, the fourth resistor R4, the fifth resistor R5, the sixth resistor R6, and the seventh resistor R7 are 470 Ω, the fifth capacitor C5 is an NC capacitor non-access circuit (reserved capacitor), the capacitance of the sixth capacitor C6 is 100nF, and the model of the second triode is Q2 and is S8050.
Specifically, the feedback pin inputs the feedback signal into the feedback signal detection module 3, sequentially passes through the third resistor R3 and the fifth resistor R5 and then enters the base of the second triode Q2, the signal is amplified through the second triode Q2, the sixth resistor R6 at the collector of the second triode Q2 acts to convert the feedback signal into a voltage signal, and the voltage signal ADC is input into the single chip microcomputer U1 from the AD acquisition port (pin 8) of the single chip microcomputer U1 from the collector of the second triode Q2 to compare the voltage signal, for example: and comparing the voltage signal ADC with a preset voltage threshold, and if the voltage signal ADC meets the preset voltage threshold, judging that the sound of the sound production device is in a normal working state. Of course, if the target type signal is a frequency signal, the feedback signal may be converted into a voltage signal, the voltage signal may be converted into a frequency signal, and the frequency signal may be input to the single chip microcomputer U1 for frequency comparison.
As a possible embodiment, in a case that the feedback signal detecting module 3 includes a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and a second transistor Q2, it may further include that a seventh resistor R7, a fifth capacitor C5, and a sixth capacitor C6 are connected in parallel, the seventh resistor R7 and the fifth capacitor C5 are connected between the base and the emitter of the second transistor Q2, and the sixth capacitor C6 is connected between the collector and the emitter of the second transistor Q2. The fifth capacitor C5, the fifth capacitor C5 and the sixth capacitor C6 are added, so that voltage stabilization filtering can be performed on each end of the second triode Q2, and the feedback signal detection module 3 can work more stably.
In this embodiment, by providing the feedback signal detection module 3 in the sound detection circuit, the feedback signal is input into the feedback signal detection module 3 based on the feedback pin of the sound generating device itself, the feedback signal is converted into the target type signal, and finally the target type signal is input into the single chip microcomputer U1 and compared with the preset signal threshold value, and whether the sound of the sound generating device is in a normal working state is judged according to the sound detection result, so that the sound self-detection function of the sound generating device is realized, the sound detection efficiency of the sound generating device in the alarm can be improved, and the cost of manual detection is reduced.
Example six
Based on the second embodiment, the indicating module 5 provided in the sixth embodiment includes an eighth resistor, and a light emitting diode connected in series with the eighth resistor;
one end of the eighth resistor is connected with the power supply voltage, and one end of the light emitting diode is connected with the control module 4.
Referring to fig. 4, fig. 4 is a circuit connection diagram of the indication module and the control module provided in this embodiment. In fig. 4, the eighth resistor is R8 and the led is D2. Optionally, the resistance of the eighth resistor R8 is 100 Ω. The eighth resistor R8 and the light emitting diode D2 are connected in series at one end of a pin 4 of the singlechip U1, and 3V power voltage is input to one end of the eighth resistor R8 to supply the light emitting diode D2 to work.
Specifically, after singlechip U1 judges voltage signal ADC, can export the sound testing result, demonstrate the sound testing result through the emitting diode D2 who is connected with singlechip U1, for example: if the sound detection result is that the sound is normal, controlling the light emitting diode D2 to display green; and if the sound detection result is that the sound is abnormal, controlling the light emitting diode D2 to display red. Of course, the display may be performed by other colors, or by sending a high level/low level to the led D2, the led D2 is controlled to be turned on/off for display. It is also possible to provide a plurality of light emitting diodes, and to display different sound detection results by controlling different light emitting diodes.
In this embodiment, through being connected emitting diode D2 series connection eighth resistance R8 as indicating module 5 and singlechip U1, singlechip U1 can export the sound testing result after accomplishing the sound detection, directly demonstrates the testing result through emitting diode D2, and is more directly perceived.
EXAMPLE seven
The embodiment provides an alarm, which comprises a sound detection circuit based on self-contained feedback of a sound generator in any one of the above embodiments.
Wherein, the alarm is a fire alarm, an audible and visual alarm, etc. The alarm comprises the sound detection circuit based on the self-contained feedback of the sounder in the embodiment, in the sound detection circuit based on the self-contained feedback of the sounder, because the feedback signal detection module 3 is additionally arranged in the sounding part circuit of the alarm, the control module 4 sends out the driving signal to drive the sound driving module 2 to generate the sound signal, the feedback signal detection module 3 can obtain the feedback signal through the connection with the feedback pin of the sounder while generating the sound signal, and converts the feedback signal into the target type signal to be input into the control module 4, the target type signal is compared with the preset signal threshold through the control module 4, the sound state of the sounder of the alarm is judged according to the comparison result, and therefore, the self-checking of the sound of the alarm can be realized, the sound detection efficiency of the sounder can be improved, and a large amount of labor cost can be saved. Therefore, the alarm provided by the embodiment can also achieve the above embodiments and achieve the corresponding effects, and details are not repeated herein.
The embodiment of the utility model provides an in, produce the acoustic signal through regularly driving BUZZER BUZZER1 sound production of singlechip U1, can be when producing the acoustic signal to feedback signal detection module 3 input feedback signal based on BUZZER BUZZER1 feedback pin from the area, feedback signal detection module 3 with feedback signal conversion to behind the target type signal through singlechip U1 AD acquisition port input in singlechip U1 with predetermine the signal threshold value and compare, judge the sound situation of sound production device based on the comparative result, and send different indicating signal through drive emitting diode D2 and demonstrate the sound normal/unusual condition of sound production device, thereby realize sound production device sound timing self-checking ability, can improve the sound detection efficiency of sound production device, practice thrift the human cost.
The terms "comprising" and "having," and any variations thereof, in the description and claims of this application and the description of the figures are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the description and claims of this application or the accompanying drawings are used for distinguishing between different objects and not for describing a particular order. The connection of the modules and elements of the circuit in this application is an electrical connection. Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A sound detection circuit based on self-contained feedback of a sound generator is characterized by comprising: the device comprises a power supply module, a sound driving module, a feedback signal detection module and a control module, wherein the sound driving module comprises a sound generating device;
the power supply module is respectively connected with the sound driving module and the control module;
the control module is respectively connected with the sound driving module and the feedback signal detection module;
the feedback signal detection module is connected with a feedback pin of the sounding device in the sound driving module;
in a working state, the control module sends out a driving signal to drive the sound driving module to generate a sound signal and generate a feedback signal on a feedback pin of the sound generating device in the sound driving module, the feedback signal detection module converts the feedback signal into a target type signal and then inputs the target type signal into the control module, and the target type signal is used for the control module to judge the sound state.
2. The sound detection circuit with feedback from a sound generator according to claim 1, further comprising an indication module, wherein the indication module is connected to the control module.
3. The sound detection circuit based on self-contained feedback of a sound generator as claimed in claim 1, wherein the power module comprises a battery pack, a control switch, a first capacitor and a second capacitor;
when the control switch is switched on, the battery pack is connected with the control switch in series to form a loop, the first capacitor and the second capacitor are connected to the loop in parallel, and the control module and the sound driving module are connected to the loop at one end of the control switch to output power supply voltage.
4. The circuit for detecting sound based on self-contained feedback of a sound generator as claimed in claim 3, wherein the power module further comprises a TVS diode connected in parallel across the battery pack and a third capacitor forming a loop with the battery pack and the control switch.
5. The sound detection circuit with feedback based on sound generator according to claim 1, wherein said sound driving module further comprises an autotransformer, a first triode and a first resistor, said sound generating device comprises a buzzer;
the first end of the buzzer is connected with one end of the autotransformer, the second end of the buzzer is connected with the feedback signal detection module, the third end of the buzzer is connected with the other end of the autotransformer, and the second end of the buzzer is a feedback pin;
the collector electrode of the first triode is connected with the autotransformer, the base electrode of the first triode is connected with the control module after being connected with the first resistor in series, and the emitting electrode of the first triode is grounded.
6. The sound detection circuit with feedback from an acoustic generator according to claim 5, wherein the sound driver module further comprises a second resistor and a fourth capacitor;
after the fourth capacitor is connected with the second resistor in parallel, one end of the fourth capacitor is connected with the base electrode of the first triode, the other end of the fourth capacitor is grounded, and meanwhile the second resistor is connected with the first resistor in series.
7. The self-feedback sound detection circuit based on an acoustic generator according to claim 5, wherein the feedback signal detection module comprises a third resistor, a fourth resistor, a fifth resistor, a sixth resistor and a second triode;
one end of the third resistor is connected with the feedback pin of the buzzer, the other end of the third resistor is connected with the fifth resistor in series and is connected to the base electrode of the second triode, and the third resistor is connected with the fourth resistor in series and is connected to the emitting electrode of the second triode and is grounded;
one end of the sixth resistor is used for inputting power voltage, the other end of the sixth resistor is connected with the collector electrode of the second triode, and the target type signal is input into the control module from the collector electrode of the second triode.
8. The sound detection circuit with feedback from an acoustic generator according to claim 7, wherein the feedback signal detection module further comprises a seventh resistor, a fifth capacitor, and a sixth capacitor;
the seventh resistor and the fifth capacitor are connected in parallel between the base and the emitter of the second triode, and the sixth capacitor is connected between the collector and the emitter of the second triode.
9. The circuit for detecting sound based on self-contained feedback of a sound generator as claimed in claim 2, wherein the indicating module comprises an eighth resistor and a light emitting diode connected in series with the eighth resistor;
one end of the eighth resistor is connected to a power supply voltage, and one end of the light emitting diode is connected to the control module.
10. An alarm unit comprising a sound detection circuit according to any of claims 1 to 9 based on feedback from the sound generator.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118658277A (en) * | 2024-08-21 | 2024-09-17 | 浙江华消科技有限公司 | Sound pressure self-checking method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118658277A (en) * | 2024-08-21 | 2024-09-17 | 浙江华消科技有限公司 | Sound pressure self-checking method and device |
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