CN208125569U - A kind of mist detecting device - Google Patents
A kind of mist detecting device Download PDFInfo
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- CN208125569U CN208125569U CN201820558184.7U CN201820558184U CN208125569U CN 208125569 U CN208125569 U CN 208125569U CN 201820558184 U CN201820558184 U CN 201820558184U CN 208125569 U CN208125569 U CN 208125569U
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Abstract
The utility model discloses a kind of mist detecting devices, including photoelectric mist detection unit and receipt signal processing unit, photoelectric mist detection unit reduces power consumption using PWM control technology, receipt signal processing unit controls power consumption using the sensitivity that booster circuit increases detection simultaneously, to reduce the power consumption of mist detecting device while ensuring that mist detecting device has highly sensitive.
Description
Technical field
The utility model relates to warning device field, specially a kind of mist detecting device.
Background technique
Various disasters are not occurring all the time in the world.Wherein, most frequently, most generally threaten public security
It is exactly fire with one of the major casualty of social development.Fire is a kind of higher disaster of occurrence frequency, almost there is hair daily
It is raw.It is shown according to various relevant data and data, the whole world is annual about to occur 6,000 ten thousand to seven thousands of times of fire, and the annual whole world is dead
In the number of fire be about 7,000 people.
With urban construction and economic fast development, the miscellaneous building in city it is increasing this largely
Increase fire hazard, frequency that fire occurs and its caused by loss in rising year by year trend.Once there is fire, this can be tight
The life and property of people are threatened again.
With the progress of society and economic development, fire constantly expands to damaging range caused by people.People are gradually
Recognize the importance of monitoring and early warning and fire-fighting work, automatic fire alarm system comes into being, and the technology water of its own
It puts down also in the constantly raising with people's demand.
Existing cigarette sense detection depends on photoelectric smoke sensor, by unique optics labyrinth, by transmitting terminal
Light refraction is to receiving end, by the output voltage of detection receiving terminal circuit to check smokescope, in order to detect in time
Smokescope in environment, needs continual operation in 24 hours, transmitting terminal generally using the mode being always on, cause transmitting terminal and
The power consumption for detecting receiving end is all bigger, meanwhile, the photoelectric signal voltage that photosensitive component generates is usually relatively low, detects smog
Sensitivity is not high.
Summary of the invention
The purpose of the utility model is to provide a kind of mist detecting devices, are reducing the same of mist detecting device power consumption
When, sensitivity is increased, solves the problems, such as that existing mist detecting device sensitivity is not high, power consumption is high.
The utility model provides a kind of mist detecting device, including photoelectric mist detection unit, dense for detecting smog
Degree, and output photoelectric signal；And receipt signal processing unit, for receiving the photosignal, and carry out boosting amplification；Institute
Stating photoelectric mist detection unit includes photoelectric sensor R16,3 resistance R17, R19, R20, triode Q3, capacitor C25；It is described
Photoelectric sensor includes light emitting diode, photodiode, optics labyrinth and 4 pins 1 ~ 4,1 He of pin of photoelectric sensor
Pin 2 is respectively the cathode of photodiode and the cathode and anode of anode, pin 3 and pin 4 respectively light emitting diode, institute
The emitter for stating triode Q3 is connect with ground terminal GND, and base stage passes through resistance R19 respectively and connect with ground terminal GND, passes through resistance
R20 is connect with control signal LPOUT, and collector is connected by the pin 3 of resistance R17 and photoelectric sensor；Power supply VCC and photoelectricity
The pin 4 of sensor connects, and is connect by capacitor C25 with ground terminal GND, and the control signal LPOUT is pwm pulse letter
Number；The receipt signal processing unit includes amplifier U2A and amplifier U2B, 6 resistance R2 ~ R7,3 capacitor C13 ~ C15,
Field-effect tube Q1, the inverting input terminal including amplifier U2A are connect with the pin 1 of the photoelectric sensor, and amplifier U2A's is same
Phase input terminal is connect with the pin 2 of the photoelectric sensor, and connect by resistance R6 with power end VCC and is passed through resistance R7 and
Ground terminal GNDAP connection, the positive power source terminal and negative power end of amplifier U2A connect with power end VCC and ground terminal GNDAP respectively
Connect, the output end of amplifier U2A is connect with the non-inverting input terminal of amplifier U2B, and by parallel capacitor C14 and resistance R2 with
The pin 1 of the photoelectric sensor connects, and the inverting input terminal of amplifier U2B passes through resistance R3 and ground terminal ground terminal GNDAP
Connection, the positive power source terminal and negative power end of amplifier U2B are connect with power end VCC and ground terminal GNDAP respectively, amplifier U2B
Output end connect with the inverting input terminal of amplifier U2B by resistance R4, power end VCC passes through the capacitor C13 and C15 of parallel connection
It is connect with ground terminal GNDAP, ground terminal GNDAP, ground terminal GND are simultaneously connect with the cathode of diode Q1, anode respectively, and respectively
It is connect with the source electrode and drain electrode of field-effect tube Q1, receipt signal processing unit controls signal MCPEN and passes through resistance R5 and field-effect
The grid of pipe Q1 connects.
Compared with prior art, the utility model has the beneficial effects that：The utility model mist detecting device is controlled by PWM
Transmitting terminal processed reduces power consumption, while receiving end increases sensitivity using low dissipation amplifier part, increases Smoke Detection sensitivity
Meanwhile reducing the power consumption of transmitting terminal and receiving end.
Detailed description of the invention
Fig. 1 is the electrical schematic diagram of the utility model photoelectric mist detection unit.
Fig. 2 is the electrical schematic diagram of the utility model receipt signal processing unit.
Specific embodiment
In order to deepen the understanding to the utility model, below in conjunction with embodiment, the utility model is described in further detail,
The embodiment is only used for explaining the utility model, does not constitute the restriction to scope of protection of the utility model.
As Figure 1-Figure 2, a kind of mist detecting device is present embodiments provided, the principle of Photoelectric Detection smog is output
Receiving end, which receives and passes through amplifying circuit, after the infrared light of end output is reflected via smog is converted into amplified voltage, cigarette
Mistiness degree determines the voltage concentration of output.
Mist detecting device includes photoelectric mist detection unit, for detecting smokescope, and output photoelectric signal；And
Receipt signal processing unit for receiving photosignal, and carries out boosting amplification；Photoelectric mist detection unit includes photoelectric sensing
Device R16,3 resistance R17, R19, R20, triode Q3, capacitor C25；Photoelectric sensor includes light emitting diode, photosensitive two pole
Pipe, optics labyrinth and 4 pins 1 ~ 4, the pin 1 and pin 2 of photoelectric sensor are respectively the cathode and just of photodiode
Pole, pin 3 and pin 4 are respectively the cathode and anode of light emitting diode, and the emitter of triode Q3 is connect with ground terminal GND,
Base stage passes through resistance R19 respectively and connect with ground terminal GND, connect by resistance R20 with control signal LPOUT, and collector passes through
The connection of the pin 3 of resistance R17 and photoelectric sensor；The pin 4 of power supply VCC and photoelectric sensor connection, and by capacitor C25 with
Ground terminal GND connection, control signal LPOUT are pwm pulse signal；Receipt signal processing unit includes amplifier U2A and amplification
Device U2B, 6 resistance R2 ~ R7,3 capacitor C13 ~ C15, field-effect tube Q1, inverting input terminal and photoelectricity including amplifier U2A
The pin 1 of sensor connects, and the non-inverting input terminal of amplifier U2A and the pin 2 of photoelectric sensor connect, and by resistance R6 with
It power end VCC connection and is connect with ground terminal GNDAP by resistance R7, the positive power source terminal and negative power end of amplifier U2A is distinguished
It being connect with power end VCC and ground terminal GNDAP, the output end of amplifier U2A is connect with the non-inverting input terminal of amplifier U2B, and
It is connected by the pin 1 of capacitor C14 and resistance R2 and photoelectric sensor in parallel, the inverting input terminal of amplifier U2B passes through electricity
Resistance R3 connect with ground terminal GNDAP, the positive power source terminal and negative power end of amplifier U2B respectively with power end VCC and ground terminal
The output end of GNDAP connection, amplifier U2B is connect by resistance R4 with the inverting input terminal of amplifier U2B, and power end VCC is logical
It crosses capacitor C13 and C15 in parallel to connect with ground terminal GNDAP, ground terminal GNDAP, ground terminal GND and respectively with diode Q1's
Cathode, anode connection, and connect respectively with the source electrode and drain electrode of field-effect tube Q1, receipt signal processing unit controls signal
MCPEN is connect by resistance R5 with the grid of field-effect tube Q1.
It is furthermore that：Resistance R2 is 1M Ω ± 1%, and resistance R3 is 1K Ω ± 1%, and resistance R4 is 100K Ω ± 1%, resistance
R5 is 10K Ω ± 1%, and resistance R6 is 200K Ω ± 1%, and resistance R7 is 10K Ω ± 1%, and resistance R17 is 100 Ω ± 1%, resistance R19
For 47K Ω ± 1%, resistance R20 is 4.7K Ω ± 1%, and capacitor C13 is 1uF ± 10%, and capacitor C14 is 3.3pF ± 0.25PF, capacitor
C15 is 100nF ± 10%, and capacitor C25 is 100uF ± 10%.
It is furthermore that：Amplifier U2A and amplifier U2B model are all MCP6002T-I/SN.
Obviously, the above embodiments of the present invention is merely examples for clearly illustrating the present invention, and
It is not limitations of the embodiments of the present invention.For those of ordinary skill in the art, in above description
On the basis of can also make other variations or changes in different ways.There is no need and unable to give all embodiments
Exhaustion.Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention etc., should be included in
Within the protection scope of the utility model.
Claims (3)
1. a kind of mist detecting device, it is characterised in that：Including photoelectric mist detection unit and receipt signal processing unit；Institute
Stating photoelectric mist detection unit includes photoelectric sensor R16,3 resistance R17, R19, R20, triode Q3 and capacitor C25；It is described
Photoelectric sensor includes light emitting diode, photodiode, optics labyrinth and 4 pins 1 ~ 4,1 He of pin of photoelectric sensor
Pin 2 is respectively the cathode and anode of photodiode, and pin 3 and pin 4 are respectively the cathode and anode of light emitting diode；Institute
The emitter for stating triode Q3 is connect with ground terminal GND, and base stage passes through resistance R19 respectively and connect with ground terminal GND, passes through resistance
R20 is connect with control signal LPOUT, and collector is connected by the pin 3 of resistance R17 and photoelectric sensor；Power supply VCC and photoelectricity
The pin 4 of sensor connects, and is connect by capacitor C25 with ground terminal GND；The control signal LPOUT is pwm pulse letter
Number；The receipt signal processing unit includes amplifier U2A and amplifier U2B, 6 resistance R2 ~ R7,3 capacitor C13 ~ C15 and
Field-effect tube Q1；The inverting input terminal of amplifier U2A is connect with the pin 1 of the photoelectric sensor, and amplifier U2A's is same mutually defeated
Enter end to connect with the pin 2 of the photoelectric sensor, and connect and pass through resistance R7 and ground connection with power end VCC by resistance R6
GNDAP connection is held, the positive power source terminal and negative power end of amplifier U2A connect with power end VCC and ground terminal GNDAP respectively, put
The output end of big device U2A connect with the non-inverting input terminal of amplifier U2B, and pass through the capacitor C14 and resistance R2 of parallel connection with it is described
The pin 1 of photoelectric sensor connects, and the inverting input terminal of amplifier U2B is connect by resistance R3 with ground terminal ground terminal GNDAP,
The positive power source terminal and negative power end of amplifier U2B is connect with power end VCC and ground terminal GNDAP respectively, the output of amplifier U2B
End is connect by resistance R4 with the inverting input terminal of amplifier U2B, and power end VCC passes through capacitor C13 and C15 in parallel and ground connection
GNDAP connection is held, ground terminal GNDAP, ground terminal GND are simultaneously connect with the cathode of diode Q1, anode respectively, and are imitated respectively with field
Should pipe Q1 source electrode and drain electrode connection, receipt signal processing unit controls signal MCPEN and passes through resistance R5 and field-effect tube Q1
Grid connection.
2. mist detecting device as described in claim 1, it is characterised in that：Resistance R2 is 1M Ω ± 1%, and resistance R3 is 1K Ω
± 1%, resistance R4 be 100K Ω ± 1%, resistance R5 be 10K Ω ± 1%, resistance R6 be 200K Ω ± 1%, resistance R7 be 10K Ω ±
1%, resistance R17 be 100 Ω ± 1%, resistance R19 be 47K Ω ± 1%, resistance R20 be 4.7K Ω ± 1%, capacitor C13 be 1uF ±
10%, capacitor C14 are 3.3pF ± 0.25PF, and capacitor C15 is 100nF ± 10%, and capacitor C25 is 100uF ± 10%.
3. mist detecting device as claimed in claim 2, it is characterised in that：The amplifier U2A and amplifier U2B model are all
For MCP6002T-I/SN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820558184.7U CN208125569U (en) | 2018-04-19 | 2018-04-19 | A kind of mist detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820558184.7U CN208125569U (en) | 2018-04-19 | 2018-04-19 | A kind of mist detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208125569U true CN208125569U (en) | 2018-11-20 |
Family
ID=64191921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820558184.7U Active CN208125569U (en) | 2018-04-19 | 2018-04-19 | A kind of mist detecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208125569U (en) |
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2018
- 2018-04-19 CN CN201820558184.7U patent/CN208125569U/en active Active
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Address after: 510000 room 504a-2, building a, Zhongda Science Park, building 628, Zhongda Puyuan District, No. 135, Xingang West Road, Haizhu District, Guangzhou City, Guangdong Province Patentee after: Guangzhou Jushi Information Technology Co., Ltd Address before: 510000 room 614, No. 150, No. 2, caofangwei, Nanhua East Road, Haizhu District, Guangzhou City, Guangdong Province Patentee before: Guangzhou Jushi Information Technology Co., Ltd. |