Smoke detection alarm

Abstract

The utility model discloses a smoke detection alarm, which relates to the technical field of smoke detection alarm, and comprises a power supply module used for electric energy processing and power supply; the smoke detection module is used for smoke detection; the oscillation control module is used for carrying out oscillation, controlling the alarm module to give an alarm and controlling the electric energy control module to carry out electric energy transmission work when the signal output by the smoke detection module exceeds a set voltage value; and the time detection module is used for setting timing time and controlling the frequency adjustment module to adjust the frequency of the output signal of the oscillation control module and improve the alarm tone of the alarm module when the electric energy receiving time exceeds the timing time. According to the smoke detection alarm, the smoke detection module performs smoke detection, after the smoke concentration reaches a certain value, the oscillation control module controls the alarm module to perform fire alarm, and meanwhile, the time detection module starts timing and improves the alarm tone when the oscillation time of the oscillation control module exceeds the set timing time.

Description

Technical Field

[0001] The utility model relates to the technical field of smoke detection and alarm, and particularly relates to a smoke detection alarm. Background Art

[0002] A smoke detection alarm is a device that realizes fire alarm by monitoring the smoke concentration, and is mainly applied to the fire protection system. The smoke detection alarm of the prior art generally consists of a smoke sensor, a 555 oscillator and an alarm. When the smoke concentration reaches the set value, the alarm works. However, due to the low intelligence of the smoke detection alarm, when the alarm works, the alarm tone needs to be set manually in advance, and the 555 oscillator cannot automatically adjust the alarm tone according to the detection duration of the smoke sensor, resulting in the people far away being unable to know the fire alarm situation in time, and the fire alarm effect is not good. Therefore, it needs to be improved. Content of the Utility Model

[0003] The embodiment of the utility model provides a smoke detection alarm to solve the problems put forward in the above background art.

[0004] To achieve the above purpose, the utility model provides the following technical scheme:

[0005] A smoke detection alarm includes: a power supply module, a smoke detection module, an oscillation control module, a power control module, a time detection module, a frequency adjustment module and an alarm module;

[0006] The power supply module is used for accessing AC power and performing rectification, filtering and voltage stabilization processing on the AC power;

[0007] The smoke detection module is connected to the power supply module, and is used for receiving the electric energy output by the power supply module and performing smoke detection, and outputting a first detection signal;

[0008] The oscillation control module is connected to the smoke detection module, the frequency adjustment module and the power supply module, and is used for oscillating and outputting a first control signal when the first detection signal exceeds the set voltage value, and the frequency of the first control signal is adjusted by the frequency adjustment module;

[0009] The power control module is connected to the power supply module, the oscillation control module and the time detection module, and is used for performing rectification and filtering processing on the first control signal and transmitting the electric energy output by the power supply module to the time detection module;

[0010] The time detection module is used for setting a timing time, starting to detect the electric energy reception time when receiving the electric energy transmitted by the power control module, and continuously outputting a second control signal when the electric energy reception time exceeds the timing time;

[0011] A frequency adjustment module, connected to the time detection module, for receiving a second control signal and adjusting the frequency of the output signal of the oscillation control module;

[0012] An alarm module, connected to the oscillation control module, for receiving a first control signal and performing an alarm operation, and increasing the alarm tone after the frequency of the first control signal increases.

[0013] As a further solution of the present utility model: The power supply module includes a power supply interface, a first rectifier, a first capacitor, a first voltage regulator, and a second capacitor; the smoke detection module includes a first sensor and a first potentiometer;

[0014] Preferably, the first end and the second end of the power supply interface are respectively connected to the first end and the second end of the first rectifier, the third end of the first rectifier is connected to the third end of the first voltage regulator and one end of the first capacitor, the second end of the first voltage regulator is connected to one end of the second capacitor and the VCC end of the first sensor, the OUT end of the first sensor is connected to one end of the first potentiometer, the other end of the first potentiometer is connected to the oscillation control circuit, the fourth end of the first rectifier, the other end of the first capacitor, the first end of the first voltage regulator, the other end of the second capacitor, the GND end of the first sensor, and the other end of the first potentiometer are all grounded.

[0015] As a further solution of the present utility model: The oscillation control module includes a second resistor, a second potentiometer, a third capacitor, a first oscillator, and a fourth capacitor; the alarm module includes a fifth capacitor and a first speaker;

[0016] Preferably, the seventh end of the first oscillator is connected to one end of the second potentiometer and is connected to the eighth end of the first oscillator and the second end of the first voltage regulator through the second resistor, the sixth end of the first oscillator is connected to the sliding contact end of the second potentiometer, the second end of the first oscillator, the first end of the third capacitor, and the other end of the second potentiometer, the fifth end of the first oscillator is grounded through the fourth capacitor, the third end of the first oscillator is connected to one end of the first speaker through the fifth capacitor, the other end of the first speaker, the first end of the first oscillator, and the second end of the third capacitor are all grounded, and the fourth end of the first oscillator is connected to the sliding contact end of the first potentiometer.

[0017] As a further solution of the present utility model: The electric energy control module includes a third resistor, a first diode, a sixth capacitor, a second switching tube, a fourth resistor, and a first power tube;

[0018] Preferably, the source of the first power transistor is connected to the second terminal of the first voltage regulator and is connected to the gate of the first power transistor and the collector of the second switching transistor through a fourth resistor. The base of the second switching transistor is connected to one end of a sixth capacitor and the cathode of a first diode. The anode of the first diode is connected to the third terminal of a first oscillator through a third resistor. The other end of the sixth capacitor and the emitter of the second switching transistor are both grounded. The drain of the first power transistor is connected to the time detection module.

[0019] As a further solution of the present invention: The frequency adjustment module includes a first switching transistor and a first resistor;

[0020] Preferably, one end of the first resistor is connected to the seventh terminal of the first oscillator, the other end of the first resistor is connected to the collector of the first switching transistor, the emitter of the first switching transistor is connected to the first end of a third capacitor, and the base of the first switching transistor is connected to the time detection module.

[0021] As a further solution of the present invention: The time detection module includes a seventh capacitor, a second diode, a fifth resistor, a first timer, an eighth capacitor, and a sixth resistor;

[0022] Preferably, one end of the seventh capacitor is connected to the fourth terminal of the first timer, the eighth terminal of the first timer, and the drain of the first power transistor. The other end of the seventh capacitor is connected to the sixth terminal of the first timer, the second terminal of the first timer, and the cathode of the second diode and is grounded through a fifth resistor. The fifth terminal of the first timer is grounded through an eighth capacitor. The first terminal of the first timer and the anode of the second diode are both grounded. The third terminal of the first timer is connected to the base of the first switching transistor through a sixth resistor.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: The smoke detection alarm of the present invention is used for smoke detection by a smoke detection module. After the smoke concentration reaches a certain value, an oscillation control module performs oscillation and controls an alarm module to give a fire alarm. At the same time, a power control module is controlled to supply power to the time detection module. When the oscillation time of the oscillation control module exceeds the timing time set by the time detection module, the frequency adjustment module will be automatically controlled to adjust the frequency of the output signal of the oscillation control module, thereby increasing the alarm tone of the alarm module and improving the intelligence and alarm effect of the alarm. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1Schematic block diagram of the principle of a smoke detection alarm provided by an example of the present utility model.

[0026] Figure 2 Circuit diagram of a smoke detection alarm provided by an example of the present utility model.

[0027] Figure 3 Connection circuit diagram of the time detection module provided by an example of the present utility model. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0029] In one embodiment, please refer to Figure 1 , a smoke detection alarm, comprising: a power supply module 1, a smoke detection module 2, an oscillation control module 3, a power control module 4, a time detection module 5, a frequency adjustment module 6, and an alarm module 7;

[0030] The power supply module 1 is used to connect to AC power and perform rectification, filtering, and voltage stabilization processing on the AC power.

[0031] The smoke detection module 2 is connected to the power supply module 1, and is used to receive the electric energy output by the power supply module 1 and perform smoke detection, and output a first detection signal.

[0032] The oscillation control module 3 is connected to the smoke detection module 2, the frequency adjustment module 6, and the power supply module 1, and is used to oscillate and output a first control signal when the first detection signal exceeds a set voltage value, and the frequency of the first control signal is adjusted by the frequency adjustment module 6.

[0033] The power control module 4 is connected to the power supply module 1, the oscillation control module 3, and the time detection module 5, and is used to perform rectification and filtering processing on the first control signal and transmit the electric energy output by the power supply module 1 to the time detection module 5.

[0034] The time detection module 5 is used to set a timing time, start detecting the electric energy reception time when receiving the electric energy transmitted by the power control module 4, and continuously output a second control signal when the electric energy reception time exceeds the timing time.

[0035] The frequency adjustment module 6 is connected to the time detection module 5, and is used to receive the second control signal and adjust the frequency of the signal output by the oscillation control module 3.

[0036] An alarm module 7, connected to the oscillation control module 3, is configured to receive the first control signal and perform alarm operations, and increase the alarm tone after the frequency of the first control signal increases.

[0037] In a specific embodiment, the above-mentioned power supply module 1 may adopt a power supply circuit composed of a power supply interface, a rectifier, a voltage regulator, etc., which can access AC power and perform rectification, filtering, and voltage regulation on the AC power; the above-mentioned smoke detection module 2 may adopt a smoke detection circuit composed of a smoke sensor and a potentiometer, where the smoke sensor detects the smoke concentration and outputs it in the form of an electrical signal, and the potentiometer adjusts the voltage value of the electrical signal; the above-mentioned oscillation control module 3 may adopt an oscillation control circuit composed of a 555 integrated circuit, resistors, capacitors, etc., and starts to oscillate when the signal output by the smoke detection module 2 exceeds the set voltage value, and controls the alarm operation of the alarm module 7; the above-mentioned power control module 4 may adopt a power control circuit composed of a triode, a power transistor, resistors, etc., which can perform rectification and filtering on the signal output by the oscillation control module 3 and transmit the power output by the power supply module 1 to the time detection module 5; the above-mentioned time detection module 5 may adopt a time detection circuit composed of a 555 integrated circuit, capacitors, resistors, etc., which can set the timing time and start timing work after being powered on, output a low-level signal during timing, and continuously output a high-level signal after timing ends; the above-mentioned frequency adjustment module 6 may adopt a frequency adjustment circuit composed of a triode and a resistor, and adjust the frequency of the signal output by the oscillation control module 3 by adjusting the time constant of the oscillation control module 3; the above-mentioned alarm module 7 may adopt an alarm circuit composed of a capacitor and a speaker, which is controlled by the oscillation control module 3 and performs sound alarm.

[0038] In another embodiment, please refer to Figure 1 、 Figure 2 and Figure 3 , the power supply module 1 includes a power supply interface, a first rectifier T1, a first capacitor C1, a first voltage regulator IC1, and a second capacitor C2; the smoke detection module 2 includes a first sensor IC2 and a first potentiometer RP1;

[0039] Specifically, the first end and the second end of the power supply interface are respectively connected to the first end and the second end of the first rectifier T1, the third end of the first rectifier T1 is connected to the third end of the first voltage regulator IC1 and one end of the first capacitor C1, the second end of the first voltage regulator IC1 is connected to one end of the second capacitor C2 and the VCC end of the first sensor IC2, the OUT end of the first sensor IC2 is connected to one end of the first potentiometer RP1, the other end of the first potentiometer RP1 is connected to the oscillation control circuit, and the fourth end of the first rectifier T1, the other end of the first capacitor C1, the first end of the first voltage regulator IC1, the other end of the second capacitor C2, the GND end of the first sensor IC2, and the other end of the first potentiometer RP1 are all grounded.

[0040] In a specific embodiment, the above-mentioned first voltage regulator IC1 can be selected as a 7805 voltage regulator; the above-mentioned first sensor IC2 can be selected as a QM-25 smoke sensor.

[0041] Further, the oscillation control module 3 includes a second resistor R2, a second potentiometer RP2, a third capacitor C3, a first oscillator IC3, and a fourth capacitor C4; the alarm module 7 includes a fifth capacitor C5 and a first speaker BL1;

[0042] Specifically, the seventh terminal of the first oscillator IC3 is connected to one end of the second potentiometer RP2 and is connected to the eighth terminal of the first oscillator IC3 and the second terminal of the first voltage regulator IC1 through the second resistor R2. The sixth terminal of the first oscillator IC3 is connected to the sliding terminal of the second potentiometer RP2, the second terminal of the first oscillator IC3, the first terminal of the third capacitor C3, and the other end of the second potentiometer RP2. The fifth terminal of the first oscillator IC3 is grounded through the fourth capacitor C4. The third terminal of the first oscillator IC3 is connected to one end of the first speaker BL1 through the fifth capacitor C5. The other end of the first speaker BL1, the first terminal of the first oscillator IC3, and the second terminal of the third capacitor C3 are all grounded. The fourth terminal of the first oscillator IC3 is connected to the sliding terminal of the first potentiometer RP1.

[0043] In a specific embodiment, the above-mentioned first oscillator IC3 can be selected as an NE555 integrated chip, which, in cooperation with the second resistor R2, the second potentiometer RP2, the third capacitor C3, and the fourth capacitor C4, forms an oscillation control circuit. The signal frequency output from the third terminal of the first oscillator IC3 depends on the time constant of the third capacitor C3, the second potentiometer RP2, and the second resistor R2.

[0044] Further, the power control module 4 includes a third resistor R3, a first diode D1, a sixth capacitor C6, a second switching transistor V2, a fourth resistor R4, and a first power transistor Q1;

[0045] Specifically, the source electrode of the first power transistor Q1 is connected to the second terminal of the first voltage regulator IC1 and is connected to the gate electrode of the first power transistor Q1 and the collector of the second switching transistor V2 through the fourth resistor R4. The base electrode of the second switching transistor V2 is connected to one end of the sixth capacitor C6 and the cathode of the first diode D1. The anode of the first diode D1 is connected to the third terminal of the first oscillator IC3 through the third resistor R3. The other end of the sixth capacitor C6 and the emitter of the second switching transistor V2 are both grounded. The drain electrode of the first power transistor Q1 is connected to the time detection module 5.

[0046] In a specific embodiment, the above-mentioned third resistor R3, the first diode D1, and the sixth capacitor C6 perform rectification and filtering processing; the above-mentioned second switching transistor V2 can be selected as an NPN-type triode to control the conduction of the first power transistor Q1; the above-mentioned first power transistor Q1 can be selected as a P-channel field effect transistor.

[0047] Further, the frequency adjustment module 6 includes a first switching transistor V1 and a first resistor R1;

[0048] Specifically, one end of the first resistor R1 is connected to the seventh terminal of the first oscillator IC3, the other end of the first resistor R1 is connected to the collector of the first switching transistor V1, the emitter of the first switching transistor V1 is connected to the first end of the third capacitor C3, and the base of the first switching transistor V1 is connected to the time detection module 5.

[0049] In a specific embodiment, the above-mentioned first switching transistor V1 can be an NPN-type triode.

[0050] Further, the time detection module 5 includes a seventh capacitor C7, a second diode D2, a fifth resistor R5, a first timer IC4, an eighth capacitor C8, and a sixth resistor R6;

[0051] Specifically, one end of the seventh capacitor C7 is connected to the fourth terminal of the first timer IC4, the eighth terminal of the first timer IC4, and the drain of the first power transistor Q1. The other end of the seventh capacitor C7 is connected to the sixth terminal of the first timer IC4, the second terminal of the first timer IC4, and the cathode of the second diode D2 and grounded through the fifth resistor R5. The fifth terminal of the first timer IC4 is grounded through the eighth capacitor C8. The first terminal of the first timer IC4 and the anode of the second diode D2 are both grounded. The third terminal of the first timer IC4 is connected to the base of the first switching transistor V1 through the sixth resistor R6.

[0052] In a specific embodiment, the above-mentioned first timer IC4 can be an NE555 integrated chip. Cooperating with the seventh capacitor C7, the second diode D2, the fifth resistor R5, the eighth capacitor C8, and the sixth resistor R6, during the period when the timing time ends and the first power transistor Q1 transmits electric energy, a high-level signal is continuously output.

[0053] In a smoke detection alarm of this embodiment, AC power is accessed through a power interface, and rectification and filtering are performed by a first rectifier T1 and a first capacitor C1. Voltage stabilization and filtering are performed by a first voltage regulator IC1 and a second capacitor C2. Smoke detection is performed by a first sensor IC2. When the detected smoke concentration exceeds a certain voltage value, the electrical energy output by the first sensor IC2 will trigger the fourth terminal of a first oscillator IC3 to become high level through a first potentiometer RP1, causing the first oscillator IC3 to cooperate with a second resistor R2, a second potentiometer RP2, a third capacitor C3, and a fourth capacitor C4 to oscillate and output a first control signal from the third terminal of the first oscillator IC3. The frequency of this first control signal is determined by the second resistor R2, the second potentiometer RP2, and the third capacitor C3, and controls a first speaker BL1 to start a fire alarm. At the same time, after the first control signal is processed by a third resistor R3, a first diode D1, and a sixth capacitor C6, it triggers a second switching tube V2 to conduct, and a first power tube Q1 conducts, enabling a first timer IC4 to be powered on and cooperate with a seventh capacitor C7, a second diode D2, a fifth resistor R5, an eighth capacitor R8, and a sixth resistor R6 to perform timing work. After the time of the first control signal exceeds the timing time, the first timer IC4 outputs a high level and controls a first switching tube V1 to conduct, causing a first resistor R1 and the first switching tube V1 to be in parallel with the second potentiometer RP2, increasing the frequency of the first control signal, and then increasing the alarm tone of the first speaker BL1 to give a high-volume alarm.

[0054] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0055] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A smoke detection alarm, characterized in that: The smoke detection alarm includes: a power supply module, a smoke detection module, an oscillation control module, an electric energy control module, a time detection module, a frequency adjustment module and an alarm module; The power module is used to receive AC power and perform rectification, filtering and voltage stabilization on the AC power; The smoke detection module is connected to the power module, and is used to receive the electric energy output by the power module and perform smoke detection, and output a first detection signal; The oscillation control module is connected to the smoke detection module, the frequency adjustment module and the power supply module, and is used to oscillate and output a first control signal when the first detection signal exceeds a set voltage value, and the frequency adjustment module adjusts the frequency of the first control signal; The power control module is connected to the power module, the oscillation control module and the time detection module, and is used to perform rectification and filtering processing on the first control signal and transmit the power output by the power module to the time detection module; The time detection module is used to set the timing time, and start detecting the power receiving time when receiving the power transmitted by the power control module, and continuously output the second control signal when the power receiving time exceeds the timing time; The frequency adjustment module is connected to the time detection module and is used to receive the second control signal and adjust the frequency of the output signal of the oscillation control module; The alarm module is connected to the oscillation control module, and is used to receive the first control signal and perform an alarm operation and increase the alarm tone after the frequency of the first control signal increases.

2. A smoke detection alarm according to claim 1, characterized in that: The power module includes a power interface, a first rectifier, a first capacitor, a first voltage regulator and a second capacitor; the smoke detection module includes a first sensor and a first potentiometer; The first end and the second end of the power interface are respectively connected to the first end and the second end of the first rectifier, the third end of the first rectifier is connected to the third end of the first voltage regulator and one end of the first capacitor, the second end of the first voltage regulator is connected to one end of the second capacitor and the VCC end of the first sensor, the OUT end of the first sensor is connected to one end of the first potentiometer, the other end of the first potentiometer is connected to the oscillation control circuit, and the fourth end of the first rectifier, the other end of the first capacitor, the first end of the first voltage regulator, the other end of the second capacitor, the GND end of the first sensor and the other end of the first potentiometer are all grounded.

3. A smoke detection alarm according to claim 2, characterized in that: The oscillation control module includes a second resistor, a second potentiometer, a third capacitor, a first oscillator and a fourth capacitor; the alarm module includes a fifth capacitor and a first speaker; The seventh end of the first oscillator is connected to one end of the second potentiometer and is connected to the eighth end of the first oscillator and the second end of the first voltage regulator through the second resistor, the sixth end of the first oscillator is connected to the slider end of the second potentiometer, the second end of the first oscillator, the first end of the third capacitor and the other end of the second potentiometer, the fifth end of the first oscillator is grounded through the fourth capacitor, the third end of the first oscillator is connected to one end of the first speaker through the fifth capacitor, the other end of the first speaker, the first end of the first oscillator and the second end of the third capacitor are all grounded, and the fourth end of the first oscillator is connected to the slider end of the first potentiometer.

4. A smoke detection alarm according to claim 3, characterized in that: The power control module includes a third resistor, a first diode, a sixth capacitor, a second switch tube, a fourth resistor and a first power tube; The source of the first power tube is connected to the second end of the first regulator and is connected to the gate of the first power tube and the collector of the second switch tube through a fourth resistor. The base of the second switch tube is connected to one end of the sixth capacitor and the cathode of the first diode. The anode of the first diode is connected to the third end of the first oscillator through a third resistor. The other end of the sixth capacitor and the emitter of the second switch tube are both grounded. The drain of the first power tube is connected to the time detection module.

5. A smoke detection alarm according to claim 4, characterized in that: The frequency adjustment module includes a first switch tube and a first resistor; One end of the first resistor is connected to the seventh end of the first oscillator, the other end of the first resistor is connected to the collector of the first switch tube, the emitter of the first switch tube is connected to the first end of the third capacitor, and the base of the first switch tube is connected to the time detection module.

6. A smoke detection alarm according to claim 5, characterized in that: The time detection module includes a seventh capacitor, a second diode, a fifth resistor, a first timer, an eighth capacitor and a sixth resistor; One end of the seventh capacitor is connected to the fourth end of the first timer, the eighth end of the first timer and the drain of the first power tube, the other end of the seventh capacitor is connected to the sixth end of the first timer, the second end of the first timer, the cathode of the second diode and grounded through the fifth resistor, the fifth end of the first timer is grounded through the eighth capacitor, the first end of the first timer and the anode of the second diode are both grounded, and the third end of the first timer is connected to the base of the first switch tube through the sixth resistor.

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