CN216014442U - Independent photoelectric smoke sensing circuit - Google Patents
Independent photoelectric smoke sensing circuit Download PDFInfo
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- CN216014442U CN216014442U CN202122331869.2U CN202122331869U CN216014442U CN 216014442 U CN216014442 U CN 216014442U CN 202122331869 U CN202122331869 U CN 202122331869U CN 216014442 U CN216014442 U CN 216014442U
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- 239000000779 smoke Substances 0.000 title claims abstract description 18
- 239000003990 capacitor Substances 0.000 claims description 14
- 230000005693 optoelectronics Effects 0.000 claims 2
- 230000005622 photoelectricity Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 16
- 238000001514 detection method Methods 0.000 description 7
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 210000000056 organ Anatomy 0.000 description 4
- 239000013078 crystal Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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Abstract
The utility model discloses a stand alone type photoelectricity smoke sensing circuit relates to warning circuit design field, the circuit includes: the device comprises an MCU, an infrared transmitting tube, an infrared receiving tube, an alarm indicating lamp and a power supply; the anode of the infrared transmitting tube, the cathode of the infrared receiving tube, the input end of the alarm indicator lamp and the power supply are all connected with the MCU, wherein the MCU is in a model of MSP430G 2231; the utility model provides a cost and the consumption of photoelectric smoke sensing circuit are lower.
Description
Technical Field
The utility model relates to an alarm circuit design field specifically relates to a stand alone type photoelectricity smoke sensing circuit.
Background
Most sampling smog of present independent photoelectricity smoke sense scheme detect special chip, and the independent photoelectricity smoke sense scheme of minority adopts MCU, and its photoelectric detection circuit of list is complicated, and the weak signal that infrared ray tube received need amplify, can send MCU to handle after the comparison judgement through fortune circuit, and fortune circuit not only can lead to product cost to increase and still can lead to the consumption to increase, produces great influence to product continuation of the journey.
SUMMERY OF THE UTILITY MODEL
The utility model aims at reducing the cost and the consumption of photoelectricity cigarette sense circuit.
In order to achieve the above object, the utility model provides a stand alone type photoelectricity smoke sensing circuit, the circuit includes:
the device comprises an MCU, an infrared transmitting tube, an infrared receiving tube, an alarm indicating lamp and a power supply; the positive pole of infrared emission pipe, the negative pole of infrared receiving tube, the input of warning pilot lamp with the power all with MCU connects, wherein, MCU's model is MSP430G 2231.
Wherein, the utility model discloses a principle does: the MCU in the application is selected as MSP430G2231, the MCU is an ultra-low power consumption microcontroller, and a low-frequency oscillator is arranged in a chip without an external crystal; the circuit is not provided with an operational amplifier circuit, the infrared receiving tube detects signals, the signals do not need to be amplified and compared through the operational amplifier, the signals are directly sent to the MCU, and the cost and the power consumption are reduced.
Preferably, the circuit further comprises a key S1, and the key S1 is connected with the MCU. The key S1 can be used to control the circuit accordingly, such as start/stop or switch function.
Preferably, the circuit further comprises a buzzer driving circuit and a buzzer, wherein the buzzer driving circuit is connected with the MCU, and the buzzer driving circuit is connected with the buzzer. When the alarm is needed, the MCU outputs an alarm signal, and the buzzer driving circuit drives the buzzer to work to give an alarm.
Preferably, the VCC terminal of the power supply is connected to one end of a capacitor C1, the other end of the capacitor C1 is connected to the DVCC terminal of the MCU, and the DVSS terminal of the MCU is grounded.
Preferably, the TX end of the MCU is connected to one end of a resistor R1, the other end of the resistor R1 is connected to the anode of the infrared emitting tube D1, and the cathode of the infrared emitting tube D1 is grounded.
Preferably, the negative electrode of the infrared receiving tube D2 is connected to the VCC terminal, the positive electrode of the infrared receiving tube D2 is connected to the RX terminal of the MCU and one end of the resistor R2, and the other end of the resistor R2 is grounded.
Preferably, one end of the resistor R3 is connected to the VCC terminal, the other end of the resistor R3 is connected to the KEY terminal of the MCU and one end of the KEY S1, and the other end of the KEY S1 is grounded.
Preferably, the alarm indicator lamp comprises a first light emitting diode and a second light emitting diode; the RED end of the MCU is connected with one end of a resistor R6, the other end of the resistor R6 is connected with the anode of the first light-emitting diode, and the cathode of the first light-emitting diode is connected; the GREEN end of the MCU is connected with one end of a resistor R5, the other end of the resistor R5 is connected with the anode of the second light-emitting diode, and the cathode of the second light-emitting diode is connected.
Preferably, the buzzer driving circuit includes: resistance R7, resistance R9, triode Q1 and third diode D3, wherein, MCU's PWM end with resistance R7's one end is connected, resistance R7's the other end with resistance R9's one end with triode Q1's base is all connected, resistance R9's other end ground connection, triode Q1's emitter ground, triode Q1's collecting electrode with third diode D3's positive pole with the negative pole of bee calling organ is connected, third diode D3's negative pole with the positive pole of bee calling organ all is connected with VCC end.
Preferably, the circuit further comprises a JTAG interface, and the JTAG interface is connected to the MCU.
Preferably, the JTAG interface includes a port 1-a port 4, the port 1 is connected to the VCC terminal, the port 2 is grounded, the port 3 is connected to one end of a resistor R8, the other end of the resistor R8 is connected to the TEST/SBWTCK terminal of the MCU, the port 4 is connected to one end of a resistor R4 and one end of a capacitor C2, the other end of the resistor R4 is connected to the VCC terminal, and the other end of the capacitor C2 is grounded.
The utility model provides a one or more technical scheme has following technological effect or advantage at least:
the utility model provides a cost and the consumption of photoelectric smoke sensing circuit are lower.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention;
FIG. 1 is a schematic diagram of the composition of a free-standing photoelectric smoke sensing circuit;
FIG. 2 is a schematic circuit diagram of the MCU;
FIG. 3 is a schematic circuit diagram of an infrared emitter tube;
FIG. 4 is a schematic circuit diagram of an infrared receiving tube;
FIG. 5 is a schematic circuit diagram of a key;
FIG. 6 is a schematic circuit diagram of an alarm indicator light;
FIG. 7 is a schematic circuit diagram of a buzzer;
FIG. 8 is a circuit diagram of a JTAG interface.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the features of the embodiments and examples of the present invention may be combined with each other without conflict between the embodiments and examples.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and the scope of the present invention is not limited by the specific embodiments disclosed below.
Referring to fig. 1, fig. 1 is a schematic diagram of a stand-alone photoelectric smoke sensing circuit, the present invention provides a stand-alone photoelectric smoke sensing circuit, which includes:
the device comprises an MCU, an infrared transmitting tube, an infrared receiving tube, an alarm indicating lamp and a power supply; the positive pole of infrared emission pipe, the negative pole of infrared receiving tube, the input of warning pilot lamp with the power all with MCU connects, wherein, MCU's model is MSP430G 2231.
In the embodiment, the selection type of the MCU is MSP430G2231, the MCU is an ultra-low power consumption microcontroller, and a low-frequency oscillator is arranged in a chip without an external crystal; the energy-saving control circuit has a deep energy-saving mode, and the current of the energy-saving control circuit is lower than 0.5uA in a standby state; the power supply range is 1.8V to 3.6V, and the common 5 # battery is suitable for power supply; the MCU is internally provided with 10-bit A/D, temperature sensing and voltage detection.
According to the smoke detection principle in the technical scheme, the infrared receiving tube detects weak signals, the signals do not need to be amplified and compared through an operational amplifier, and the signals are directly sent to the MCU to realize smoke detection.
Because the MCU in this embodiment is built-in to have temperature sensing, voltage detection function, therefore, the technical scheme of this embodiment can expand and increase temperature detection and voltage detection function.
The scheme has the advantages of no operational amplifier circuit, low cost and power consumption, and simple circuit design.
In the embodiment of the present invention, the circuit further includes a key S1, and the key S1 is connected to the MCU.
In the embodiment of the present invention, the circuit further includes a buzzer driving circuit and a buzzer, the buzzer driving circuit is connected to the MCU, and the buzzer driving circuit is connected to the buzzer.
Referring to fig. 2, fig. 2 is a circuit schematic diagram of an MCU, wherein, in the embodiment of the present invention, a VCC terminal of the power supply is connected to one terminal of a capacitor C1, another terminal of the capacitor C1 is connected to a DVCC terminal of the MCU, and a DVSS terminal of the MCU is grounded. In practical application, the value of the capacitor C1 may be 0.1 uf.
Referring to fig. 3, fig. 3 is a schematic circuit diagram of an infrared emission tube, wherein in an embodiment of the present invention, a TX end of the MCU is connected to one end of a resistor R1, another end of the resistor R1 is connected to an anode of the infrared emission tube D1, and a cathode of the infrared emission tube D1 is grounded. The resistor R1 may have a magnitude of 75.
Referring to fig. 4, fig. 4 is a schematic circuit diagram of an infrared receiving tube, wherein in an embodiment of the present invention, a negative electrode of the infrared receiving tube D2 is connected to a VCC terminal, a positive electrode of the infrared receiving tube D2 is connected to both an RX terminal of the MCU and one end of a resistor R2, and the other end of the resistor R2 is grounded. The resistor R2 may be sized to be 50K.
Referring to fig. 5, fig. 5 is a schematic circuit diagram of a KEY, wherein in an embodiment of the present invention, one end of a resistor R3 is connected to a VCC terminal, the other end of the resistor R3 is connected to both a KEY terminal of the MCU and one end of the KEY S1, and the other end of the KEY S1 is grounded. The resistor R3 may be sized to be 4.7K.
Referring to fig. 6, fig. 6 is a circuit schematic diagram of an alarm indicator light, wherein in an embodiment of the present invention, the alarm indicator light includes a first light emitting diode and a second light emitting diode; the RED end of the MCU is connected with one end of a resistor R6, the other end of the resistor R6 is connected with the anode of the first light-emitting diode, and the cathode of the first light-emitting diode is connected; the GREEN end of the MCU is connected with one end of a resistor R5, the other end of the resistor R5 is connected with the anode of the second light-emitting diode, and the cathode of the second light-emitting diode is connected. Wherein, the resistors R5 and R6 may be 470 in size.
Referring to fig. 7, fig. 7 is a schematic circuit diagram of a buzzer, wherein in the embodiment of the present invention, the buzzer driving circuit includes: resistance R7, resistance R9, triode Q1 and third diode D3, wherein, MCU's PWM end with resistance R7's one end is connected, resistance R7's the other end with resistance R9's one end with triode Q1's base is all connected, resistance R9's other end ground connection, triode Q1's emitter ground, triode Q1's collecting electrode with third diode D3's positive pole with the negative pole of bee calling organ is connected, third diode D3's negative pole with the positive pole of bee calling organ all is connected with VCC end. The resistor R7 may have a size of 1K, and the resistor R9 may have a size of 10K.
Referring to fig. 8, fig. 8 is a schematic circuit diagram of a JTAG interface, wherein in an embodiment of the present invention, the circuit further includes a JTAG interface, and the JTAG interface is connected to the MCU.
In the embodiment of the present invention, the JTAG interface includes a port 1-a port 4, the port 1 is connected to a VCC terminal, the port 2 is grounded, the port 3 is connected to one end of a resistor R8, the other end of the resistor R8 is connected to a TEST/SBWTCK terminal of the MCU, the port 4 is connected to one end of a resistor R4 and one end of a capacitor C2, the other end of the resistor R4 is connected to the VCC terminal, and the other end of the capacitor C2 is grounded. Wherein, the resistor R4 can be 47K, and the capacitor C2 can be 1 nF. Resistor R8 may have a magnitude of 33.
While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (4)
1. A self-contained optoelectronic smoke sensing circuit, the circuit comprising:
the device comprises an MCU, an infrared transmitting tube, an infrared receiving tube, an alarm indicating lamp and a power supply; the anode of the infrared transmitting tube, the cathode of the infrared receiving tube, the input end of the alarm indicator lamp and the power supply are all connected with the MCU, wherein the MCU is in a model of MSP430G 2231;
the circuit further comprises a buzzer driving circuit and a buzzer, the buzzer driving circuit is connected with the MCU, and the buzzer driving circuit is connected with the buzzer;
the TX end of the MCU is connected with one end of a resistor R1, the other end of the resistor R1 is connected with the anode of the infrared transmitting tube D1, and the cathode of the infrared transmitting tube D1 is grounded;
the negative electrode of the infrared receiving tube D2 is connected with a VCC end, the positive electrode of the infrared receiving tube D2 is connected with the RX end of the MCU and one end of a resistor R2, and the other end of the resistor R2 is grounded;
the alarm indicator lamp comprises a first light emitting diode and a second light emitting diode; the RED end of the MCU is connected with one end of a resistor R6, the other end of the resistor R6 is connected with the anode of the first light-emitting diode, and the cathode of the first light-emitting diode is connected; the GREEN end of the MCU is connected with one end of a resistor R5, the other end of the resistor R5 is connected with the anode of the second light-emitting diode, and the cathode of the second light-emitting diode is connected;
the buzzer driving circuit includes: the circuit comprises a resistor R7, a resistor R9, a triode Q1 and a third diode D3, wherein the PWM end of the MCU is connected with one end of the resistor R7, the other end of the resistor R7 is connected with one end of the resistor R9 and the base of the triode Q1, the other end of the resistor R9 is grounded, the emitter of the triode Q1 is grounded, the collector of the triode Q1 is connected with the anode of the third diode D3 and the cathode of the buzzer, and the cathode of the third diode D3 and the anode of the buzzer are connected with the VCC end; the circuit also comprises a JTAG interface, and the JTAG interface is connected with the MCU; the JTAG interface comprises ports 1-4, port 1 is connected with a VCC end, port 2 is grounded, port 3 is connected with one end of a resistor R8, the other end of the resistor R8 is connected with the TEST/SBWTCK end of the MCU, port 4 is connected with one end of a resistor R4 and one end of a capacitor C2, the other end of the resistor R4 is connected with the VCC end, and the other end of the capacitor C2 is grounded.
2. A self-contained optoelectronic smoke sensing circuit according to claim 1 and also comprising a key S1, said key S1 being connected to said MCU.
3. A standalone photoelectric smoke sensing circuit as claimed in claim 1, wherein VCC terminal of the power supply is connected to one terminal of a capacitor C1, the other terminal of the capacitor C1 is connected to DVCC terminal of the MCU, DVSS terminal of the MCU is grounded.
4. The standalone photoelectric smoke sensing circuit of claim 2, wherein one end of a resistor R3 is connected to VCC end, the other end of the resistor R3 is connected to both KEY end of the MCU and one end of the KEY S1, and the other end of the KEY S1 is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122331869.2U CN216014442U (en) | 2021-09-26 | 2021-09-26 | Independent photoelectric smoke sensing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122331869.2U CN216014442U (en) | 2021-09-26 | 2021-09-26 | Independent photoelectric smoke sensing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216014442U true CN216014442U (en) | 2022-03-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122331869.2U Active CN216014442U (en) | 2021-09-26 | 2021-09-26 | Independent photoelectric smoke sensing circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216014442U (en) |
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2021
- 2021-09-26 CN CN202122331869.2U patent/CN216014442U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231009 Address after: No. 27, 5th Floor, Building 8, No. 88 Shengbang Street, Chengdu High tech Zone, China (Sichuan) Pilot Free Trade Zone, Chengdu City, Sichuan Province, 610000 Patentee after: Chengdu Yanda Information Technology Co.,Ltd. Address before: No.19, east section of Fucheng Avenue, high tech Zone, Chengdu, Sichuan 610000 Patentee before: Liu Yan |
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| TR01 | Transfer of patent right |