CN104749078A - PM2.5 concentration detector - Google Patents
PM2.5 concentration detector Download PDFInfo
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- CN104749078A CN104749078A CN201510175438.8A CN201510175438A CN104749078A CN 104749078 A CN104749078 A CN 104749078A CN 201510175438 A CN201510175438 A CN 201510175438A CN 104749078 A CN104749078 A CN 104749078A
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Abstract
The invention discloses a PM2.5 concentration detector. The PM2.5 concentration detector comprises a sensor circuit, an A/D (Analog/Digital) conversion circuit, a master control circuit, a display circuit, an alarm circuit and a pollution reminding circuit, wherein the sensor circuit and the A/D conversion circuit are connected in series, the master control circuit is connected with the A/D conversion circuit, the display circuit, the alarm circuit and the pollution reminding circuit respectively; the sensor circuit is used for converting the PM2.5 concentration value into a corresponding electrical signal and sending the electrical signal to the A/D conversion circuit for analog-digital conversion, and the converted data are sent to the master control circuit to be processed to acquire a result; the display circuit is used for displaying the measurement result on a display; and when the detected PM2.5 concentration value exceeds the preset alarm value, the master control circuit controls the alarm circuit to give an alarm signal and controls the pollution reminding circuit to lighten an indicator light representing the corresponding pollution level, and is used for indicating the pollution level. The PM2.5 concentration detector has a beautiful and environment-friendly interface, can be operated simply and conveniently, has high cost performance and has high practical value.
Description
Technical field
The invention belongs to environmental protection industry (epi) smart electronics instrument field, be specifically related to a kind of simple and practical PM2.5 concentration detector.
Background technology
On market, PM2.5 concentration detector is of a great variety, but most of measuring accuracy of PM2.5 concentration detector, the contradiction between measurement range and price are solved well, the price that measuring accuracy is high, scope is wide is also higher, therefore needs to seek that a kind of measurement range is wide, precision is higher and lower-cost PM2.5 concentration detector.
Summary of the invention
In order to solve above-mentioned technical matters, the invention provides that a kind of measurement range is wide, precision is higher and lower-cost PM2.5 concentration detector.
The technical solution adopted in the present invention is: a kind of PM2.5 concentration detector, is characterized in that: comprise sensor circuit, A/D change-over circuit, governor circuit, display circuit, warning circuit, pollution alert circuit; Described sensor circuit and A/D change-over circuit are connected in series, and described governor circuit is connected with described A/D change-over circuit, display circuit, warning circuit, pollution alert circuit respectively; PM2.5 concentration value is converted to corresponding electric signal by described sensor circuit, and electric signal is sent to described A/D change-over circuit and carry out analog to digital conversion, and the data after conversion send described governor circuit process to, obtain a result; Measurement result shows by described display circuit over the display; When the PM2.5 concentration value detected exceedes default alarming value, the warning circuit described in described governor circuit controls sends alerting signal, and the pollution alert circuit described in controlling lights the pilot lamp of the corresponding class of pollution, is used to indicate the class of pollution.
As preferably, described PM2.5 concentration detector also comprises reset circuit, is connected, for circuit reset with described governor circuit.
As preferably, described PM2.5 concentration detector also comprises crystal oscillating circuit, is connected with described governor circuit, for described PM2.5 concentration detector provides basic clock signal.
As preferably, described PM2.5 concentration detector also comprises key circuit, is connected with described governor circuit, for manually arranging PM2.5 concentration alarming value.
As preferably, described PM2.5 concentration detector also comprises the interface circuit that downloads, and is connected with described governor circuit, for downloading to described governor circuit, facilitates the burning of program.
As preferably, its core devices of described sensor circuit is dust sensor GP2Y1010AU0F; The pin 1 of sensor GP2Y1010AU0F meets VCC by resistance R23, and pin 1 is by polar capacitor C6 ground connection; Pin 2,4 ground connection; Pin 5 meets VCC; Pin 3 is connected on the collector of triode Q5; The grounded emitter of triode Q5; The base stage of triode Q5 is connected on resistance R22 one end; The other end of resistance R22 stamps network label PC.
As preferably, described governor circuit coordinates the core circuit that each circuit normally works, and its core devices is single-chip microcomputer STC89C52; The pin 1,2,3,4,5,6,7,8 of single-chip microcomputer STC89C52 stamps network label P11, P12, P13, SPK, CLK, ST, OE, PC respectively; Pin 9 stamps network label RST; Pin 10,11,12,13,14,15,16,17 stamps network label D00, D01, D02, D03, D04, D05, D06, D07 respectively; Pin 18,19 stamps network label X2, X1 respectively; Pin 20 ground connection; Pin 21,22,23,24,25,26,27,28 stamps network label P20, P21, P22, P23, EOC, P25, P26, P27 respectively; Pin 31 meets VCC by resistance R10; Pin 32,33,34,35,36,37,38,39 stamps network label D7, D6, D5, D4, D3, D2, D1, D0 respectively; Pin 40 meets VCC, and pin 40 is by electric capacity C2 ground connection, and polar capacitor C3 is connected in parallel on electric capacity C2 two ends; Single-chip microcomputer pin 32,33,34,35,36,37,38,39 is connected on the pin 9,8,7,6,5,4,3,2 of connector PR1 respectively; The pin 1 of connector PR1 meets VCC.
As preferably, described its core devices of A/D change-over circuit is converter ADC0809; The pin 10,6,9,7 of converter ADC0809 stamps network label CLK, ST, OE, EOC respectively; Pin 22 stamps network label ST; Pin 22 is connected with pin 6; Pin 23,24,25 ground connection; Pin 17,14,15,8,18,19,20,21 stamps network label D00, D01, D02, D03, D04, D05, D06, D07 respectively; Pin 12 meets VCC; Ground connection after pin 16,5,4,3,2,1,28,27 is in parallel; Pin 26 stamps network label ADC.
As preferably, the core devices of described display circuit is group of four figures pipe LG3641 and triode S8550; The pin 11,7,4,2,1,10,5,3 of group of four figures pipe LG3641 is connected on resistance R1, R2, R3, R4, R5, R6, R7, R8 respectively; The other end of resistance R1, R2, R3, R4, R5, R6, R7, R8 stamps network label D0, D1, D2, D3, D4, D5, D6, D7 respectively; Q1, Q2, Q3, Q4 is made to represent the identical triode S8550 of 4 types respectively, then the emitter E of triode Q1 is connected on the pin 12 of charactron, the collector C of triode Q1 meets VCC, and the base stage B of triode Q1 is connected on one end of resistance R14, and the other end of resistance R14 stamps network label P20; The emitter E of triode Q2 is connected on the pin 9 of charactron, and the collector C of triode Q2 meets VCC, and the base stage B of triode Q2 is connected on one end of resistance R15, and the other end of resistance R15 stamps network label P21; The emitter E of triode Q3 is connected on the pin 8 of charactron, and the collector C of triode Q3 meets VCC, and the base stage B of triode Q3 is connected on one end of resistance R16, and the other end of resistance R16 stamps network label P22; The emitter E of triode Q4 is connected on the pin 6 of charactron, and the collector C of triode Q4 meets VCC, and the base stage B of triode Q4 is connected on one end of resistance R17, and the other end of resistance R17 stamps network label P23.
As preferably, the main devices of described warning circuit is loudspeaker LS1; The one termination VCC of loudspeaker LS1, the other end is connected on the collector of triode Q6; The base stage connecting resistance R24 of triode Q6, the resistance R24 other end stamps network label SPK; The grounded emitter of triode Q6; Resistance R21 mono-termination VCC, the other end stamps network label SPK.
As preferably, the main devices of described pollution alert circuit is light emitting diode, and the positive pole of its light emitting diode HL1 meets VCC by resistance R11, and negative pole stamps network label P11; The positive pole of light emitting diode HL2 meets VCC by resistance R12, and negative pole stamps network label P12; The positive pole of light emitting diode HL3 meets VCC by resistance R13, and negative pole stamps network label P13.
As preferably, the core devices of described reset circuit is 10uF/35V electrolytic condenser C1; The positive pole of electrolytic condenser C1 meets VCC, and the negative pole of electrolytic condenser C1 is by resistance R9 ground connection; Button J1 is connected in parallel on the two ends of electrolytic condenser C1; The negative pole of electrolytic condenser C1 stamps network label RST.
As preferably, the core devices of described crystal oscillating circuit is crystal oscillator G1; The two ends of crystal oscillator G1 stamp network label X1, X2 respectively; One end of crystal oscillator G1 is by electric capacity C4 ground connection, and the other end is by electric capacity C5 ground connection.
As preferably, described key circuit, its button K1 one end ground connection, the other end meets VCC by resistance R18, and stamps network label P25 at the ungrounded end of button K1; Button K2 one end ground connection, the other end meets VCC by resistance R19, and stamps network label P26 at the ungrounded end of button K2; Button K3 one end ground connection, the other end meets VCC by resistance R20, and stamps network label P27 at the ungrounded end of button K3;
As preferably, the main devices of the described interface circuit circuit that downloads is connector J3, and the pin 1 of connector J3 meets VCC; Network label RXD, TXD are stamped in pin 2,3 distribution; Pin 4 ground connection.
Measurement range of the present invention is comparatively wide, and measuring accuracy is high, and measuring result error is less, all within the range of permission; This PM2.5 concentration detector can arrange an alarming value, and after the PM2.5 concentration value detected exceedes alarming value, loudspeaker can send alerting signal, and alarming value can be arranged by button manual adjustments in real time.In addition, this PM2.5 concentration detector, while showing PM2.5 concentration value in real time, can light corresponding pilot lamp according to concentration value, tell user's air pollution grade intuitively; The chip that the design adopts and components and parts all very common, commercially easily buy, and price is also more cheap; The PM2.5 concentration detector beautiful interface researched and developed is friendly, simple to operation.Therefore, the cost performance of this PM2.5 concentration detector is higher, has higher practical value.
Accompanying drawing explanation
Fig. 1: the circuit theory diagrams of the embodiment of the present invention;
Fig. 2: the circuit diagram of the sensor circuit of the embodiment of the present invention;
Fig. 3: the circuit diagram of the governor circuit of the embodiment of the present invention;
Fig. 4: the circuit diagram of the A/D change-over circuit of the embodiment of the present invention;
Fig. 5: the circuit diagram of the display circuit of the embodiment of the present invention;
Fig. 6: the circuit diagram of the warning circuit of the embodiment of the present invention;
Fig. 7: the circuit diagram of the pollution alert circuit of the embodiment of the present invention;
Fig. 8: the circuit diagram of the reset circuit of the embodiment of the present invention;
Fig. 9: the circuit diagram of the crystal oscillating circuit of the embodiment of the present invention;
Figure 10: the circuit diagram of the key circuit of the embodiment of the present invention;
Figure 11: the circuit diagram of the interface circuit that downloads of the embodiment of the present invention.
Embodiment
Understand for the ease of those of ordinary skill in the art and implement the present invention, below in conjunction with drawings and Examples, the present invention is described in further detail, should be appreciated that exemplifying embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
Ask for an interview Fig. 1, a kind of PM2.5 concentration detector that the present embodiment provides, comprises sensor circuit, A/D change-over circuit, governor circuit, display circuit, warning circuit, pollution alert circuit, reset circuit, crystal oscillating circuit, key circuit and the interface circuit that downloads; Reset circuit is used for circuit reset; Crystal oscillating circuit provides basic clock signal for described PM2.5 concentration detector; Key circuit is used for manually arranging PM2.5 concentration alarming value; Downloading interface circuit for downloading to governor circuit, facilitating the burning of program; Described sensor circuit and A/D change-over circuit are connected in series, and described governor circuit is connected with described A/D change-over circuit, display circuit, warning circuit, pollution alert circuit, reset circuit, crystal oscillating circuit, key circuit and the interface circuit that downloads respectively; Described sensor circuit gathers dust in air concentration, PM2.5 concentration value is converted to corresponding electric signal, and electric signal is sent to described A/D change-over circuit and carry out analog to digital conversion, the data after conversion send described governor circuit process to, obtain a result; Measurement result shows by described display circuit over the display; When the PM2.5 concentration value detected exceedes default alarming value, the warning circuit described in described governor circuit controls sends alerting signal, and the pollution alert circuit described in controlling lights the pilot lamp of the corresponding class of pollution, is used to indicate the class of pollution.
Ask for an interview Fig. 2, its core devices of the sensor circuit of the present embodiment is dust sensor GP2Y1010AU0F; The pin 1 of sensor GP2Y1010AU0F meets VCC by resistance R23, and pin 1 is by polar capacitor C6 ground connection; Pin 2,4 ground connection; Pin 5 meets VCC; Pin 3 is connected on the collector of triode Q5; The grounded emitter of triode Q5; The base stage of triode Q5 is connected on resistance R22 one end; The other end of resistance R22 stamps network label PC.
Ask for an interview Fig. 3, the governor circuit of the present embodiment is the core circuit that each circuit of coordination normally works, and its core devices is single-chip microcomputer STC89C52; The pin 1,2,3,4,5,6,7,8 of single-chip microcomputer STC89C52 stamps network label P11, P12, P13, SPK, CLK, ST, OE, PC respectively; Pin 9 stamps network label RST; Pin 10,11,12,13,14,15,16,17 stamps network label D00, D01, D02, D03, D04, D05, D06, D07 respectively; Pin 18,19 stamps network label X2, X1 respectively; Pin 20 ground connection; Pin 21,22,23,24,25,26,27,28 stamps network label P20, P21, P22, P23, EOC, P25, P26, P27 respectively; Pin 31 meets VCC by resistance R10; Pin 32,33,34,35,36,37,38,39 stamps network label D7, D6, D5, D4, D3, D2, D1, D0 respectively; Pin 40 meets VCC, and pin 40 is by electric capacity C2 ground connection, and polar capacitor C3 is connected in parallel on electric capacity C2 two ends; Single-chip microcomputer pin 32,33,34,35,36,37,38,39 is connected on the pin 9,8,7,6,5,4,3,2 of connector PR1 respectively; The pin 1 of connector PR1 meets VCC.
Ask for an interview Fig. 4, its core devices of A/D change-over circuit of the present embodiment is converter ADC0809; The pin 10,6,9,7 of converter ADC0809 stamps network label CLK, ST, OE, EOC respectively; Pin 22 stamps network label ST; Pin 22 is connected with pin 6; Pin 23,24,25 ground connection; Pin 17,14,15,8,18,19,20,21 stamps network label D00, D01, D02, D03, D04, D05, D06, D07 respectively; Pin 12 meets VCC; Ground connection after pin 16,5,4,3,2,1,28,27 is in parallel; Pin 26 stamps network label ADC.
Ask for an interview Fig. 5, the core devices of the display circuit of the present embodiment is group of four figures pipe LG3641 and triode S8550; The pin 11,7,4,2,1,10,5,3 of group of four figures pipe LG3641 is connected on resistance R1, R2, R3, R4, R5, R6, R7, R8 respectively; The other end of resistance R1, R2, R3, R4, R5, R6, R7, R8 stamps network label D0, D1, D2, D3, D4, D5, D6, D7 respectively; Q1, Q2, Q3, Q4 is made to represent the identical triode S8550 of 4 types respectively, then the emitter E of triode Q1 is connected on the pin 12 of charactron, the collector C of triode Q1 meets VCC, and the base stage B of triode Q1 is connected on one end of resistance R14, and the other end of resistance R14 stamps network label P20; The emitter E of triode Q2 is connected on the pin 9 of charactron, and the collector C of triode Q2 meets VCC, and the base stage B of triode Q2 is connected on one end of resistance R15, and the other end of resistance R15 stamps network label P21; The emitter E of triode Q3 is connected on the pin 8 of charactron, and the collector C of triode Q3 meets VCC, and the base stage B of triode Q3 is connected on one end of resistance R16, and the other end of resistance R16 stamps network label P22; The emitter E of triode Q4 is connected on the pin 6 of charactron, and the collector C of triode Q4 meets VCC, and the base stage B of triode Q4 is connected on one end of resistance R17, and the other end of resistance R17 stamps network label P23.Display device is output block important in digital display circuit, for intuitive measurement results fed back to gauger, is the necessary links of man-machine interaction.
Ask for an interview Fig. 6, the main devices of the warning circuit of the present embodiment is loudspeaker LS1; The one termination VCC of loudspeaker LS1, the other end is connected on the collector of triode Q6; The base stage connecting resistance R24 of triode Q6, the resistance R24 other end stamps network label SPK; The grounded emitter of triode Q6; Resistance R21 mono-termination VCC, the other end stamps network label SPK.
Ask for an interview Fig. 7, the main devices of the pollution alert circuit of the present embodiment is light emitting diode, and the positive pole of its light emitting diode HL1 meets VCC by resistance R11, and negative pole stamps network label P11; The positive pole of light emitting diode HL2 meets VCC by resistance R12, and negative pole stamps network label P12; The positive pole of light emitting diode HL3 meets VCC by resistance R13, and negative pole stamps network label P13.
Ask for an interview Fig. 8, the core devices of the reset circuit of the present embodiment is 10uF/35V electrolytic condenser C1; The positive pole of electrolytic condenser C1 meets VCC, and the negative pole of electrolytic condenser C1 is by resistance R9 ground connection; Button J1 is connected in parallel on the two ends of electrolytic condenser C1; The negative pole of electrolytic condenser C1 stamps network label RST.
Ask for an interview Fig. 9, the present embodiment the core devices of crystal oscillating circuit be crystal oscillator G1; The two ends of crystal oscillator G1 stamp network label X1, X2 respectively; One end of crystal oscillator G1 is by electric capacity C4 ground connection, and the other end is by electric capacity C5 ground connection.
Ask for an interview Figure 10, the key circuit of the present embodiment, its button K1 one end ground connection, the other end meets VCC by resistance R18, and stamps network label P25 at the ungrounded end of button K1; Button K2 one end ground connection, the other end meets VCC by resistance R19, and stamps network label P26 at the ungrounded end of button K2; Button K3 one end ground connection, the other end meets VCC by resistance R20, and stamps network label P27 at the ungrounded end of button K3;
Ask for an interview Figure 11, the main devices of the interface circuit that downloads of the present embodiment is connector J3, and the pin 1 of connector J3 meets VCC; Network label RXD, TXD are stamped in pin 2,3 distribution; Pin 4 ground connection.
PM2.5 concentration detector of the present invention connects air to be measured, to various piece module for power supply, is run by key control circuit, can read concrete PM2.5 concentration value after operation on charactron.Can show the class of pollution for pilot lamp, the alarming value preset if exceed, loudspeaker will give the alarm simultaneously.
Should be understood that, the part that this instructions does not elaborate all belongs to prior art.
Should be understood that; the above-mentioned description for preferred embodiment is comparatively detailed; therefore the restriction to scope of patent protection of the present invention can not be thought; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that the claims in the present invention protect; can also make and replacing or distortion, all fall within protection scope of the present invention, request protection domain of the present invention should be as the criterion with claims.
Claims (15)
1. a PM2.5 concentration detector, is characterized in that: comprise sensor circuit, A/D change-over circuit, governor circuit, display circuit, warning circuit, pollution alert circuit; Described sensor circuit and A/D change-over circuit are connected in series, and described governor circuit is connected with described A/D change-over circuit, display circuit, warning circuit, pollution alert circuit respectively; PM2.5 concentration value is converted to corresponding electric signal by described sensor circuit, and electric signal is sent to described A/D change-over circuit and carry out analog to digital conversion, and the data after conversion send described governor circuit process to, obtain a result; Measurement result shows by described display circuit over the display; When the PM2.5 concentration value detected exceedes default alarming value, the warning circuit described in described governor circuit controls sends alerting signal, and the pollution alert circuit described in controlling lights the pilot lamp of the corresponding class of pollution, is used to indicate the class of pollution.
2. PM2.5 concentration detector according to claim 1, is characterized in that: described PM2.5 concentration detector also comprises reset circuit, is connected, for circuit reset with described governor circuit.
3. PM2.5 concentration detector according to claim 1, is characterized in that: described PM2.5 concentration detector also comprises crystal oscillating circuit, is connected with described governor circuit, for described PM2.5 concentration detector provides basic clock signal.
4. PM2.5 concentration detector according to claim 1, is characterized in that: described PM2.5 concentration detector also comprises key circuit, is connected with described governor circuit, for manually arranging PM2.5 concentration alarming value.
5. PM2.5 concentration detector according to claim 1, is characterized in that: described PM2.5 concentration detector also comprises the interface circuit that downloads, and is connected with described governor circuit, for downloading to described governor circuit, facilitates the burning of program.
6. PM2.5 concentration detector according to claim 1, is characterized in that: its core devices of described sensor circuit is dust sensor GP2Y1010AU0F; The pin 1 of sensor GP2Y1010AU0F meets VCC by resistance R23, and pin 1 is by polar capacitor C6 ground connection; Pin 2,4 ground connection; Pin 5 meets VCC; Pin 3 is connected on the collector of triode Q5; The grounded emitter of triode Q5; The base stage of triode Q5 is connected on resistance R22 one end; The other end of resistance R22 stamps network label PC.
7. PM2.5 concentration detector according to claim 1, is characterized in that: described governor circuit is the core circuit that each circuit of coordination normally works, and its core devices is single-chip microcomputer STC89C52; The pin 1,2,3,4,5,6,7,8 of single-chip microcomputer STC89C52 stamps network label P11, P12, P13, SPK, CLK, ST, OE, PC respectively; Pin 9 stamps network label RST; Pin 10,11,12,13,14,15,16,17 stamps network label D00, D01, D02, D03, D04, D05, D06, D07 respectively; Pin 18,19 stamps network label X2, X1 respectively; Pin 20 ground connection; Pin 21,22,23,24,25,26,27,28 stamps network label P20, P21, P22, P23, EOC, P25, P26, P27 respectively; Pin 31 meets VCC by resistance R10; Pin 32,33,34,35,36,37,38,39 stamps network label D7, D6, D5, D4, D3, D2, D1, D0 respectively; Pin 40 meets VCC, and pin 40 is by electric capacity C2 ground connection, and polar capacitor C3 is connected in parallel on electric capacity C2 two ends; Single-chip microcomputer pin 32,33,34,35,36,37,38,39 is connected on the pin 9,8,7,6,5,4,3,2 of connector PR1 respectively; The pin 1 of connector PR1 meets VCC.
8. PM2.5 concentration detector according to claim 1, is characterized in that: described its core devices of A/D change-over circuit is converter ADC0809; The pin 10,6,9,7 of converter ADC0809 stamps network label CLK, ST, OE, EOC respectively; Pin 22 stamps network label ST; Pin 22 is connected with pin 6; Pin 23,24,25 ground connection; Pin 17,14,15,8,18,19,20,21 stamps network label D00, D01, D02, D03, D04, D05, D06, D07 respectively; Pin 12 meets VCC; Ground connection after pin 16,5,4,3,2,1,28,27 is in parallel; Pin 26 stamps network label ADC.
9. PM2.5 concentration detector according to claim 1, is characterized in that: the core devices of described display circuit is group of four figures pipe LG3641 and triode S8550; The pin 11,7,4,2,1,10,5,3 of group of four figures pipe LG3641 is connected on resistance R1, R2, R3, R4, R5, R6, R7, R8 respectively; The other end of resistance R1, R2, R3, R4, R5, R6, R7, R8 stamps network label D0, D1, D2, D3, D4, D5, D6, D7 respectively; Q1, Q2, Q3, Q4 is made to represent the identical triode S8550 of 4 types respectively, then the emitter E of triode Q1 is connected on the pin 12 of charactron, the collector C of triode Q1 meets VCC, and the base stage B of triode Q1 is connected on one end of resistance R14, and the other end of resistance R14 stamps network label P20; The emitter E of triode Q2 is connected on the pin 9 of charactron, and the collector C of triode Q2 meets VCC, and the base stage B of triode Q2 is connected on one end of resistance R15, and the other end of resistance R15 stamps network label P21; The emitter E of triode Q3 is connected on the pin 8 of charactron, and the collector C of triode Q3 meets VCC, and the base stage B of triode Q3 is connected on one end of resistance R16, and the other end of resistance R16 stamps network label P22; The emitter E of triode Q4 is connected on the pin 6 of charactron, and the collector C of triode Q4 meets VCC, and the base stage B of triode Q4 is connected on one end of resistance R17, and the other end of resistance R17 stamps network label P23.
10. PM2.5 concentration detector according to claim 1, is characterized in that: the main devices of described warning circuit is loudspeaker LS1; The one termination VCC of loudspeaker LS1, the other end is connected on the collector of triode Q6; The base stage connecting resistance R24 of triode Q6, the resistance R24 other end stamps network label SPK; The grounded emitter of triode Q6; Resistance R21 mono-termination VCC, the other end stamps network label SPK.
11. PM2.5 concentration detectors according to claim 1, is characterized in that: the main devices of described pollution alert circuit is light emitting diode, and the positive pole of its light emitting diode HL1 meets VCC by resistance R11, and negative pole stamps network label P11; The positive pole of light emitting diode HL2 meets VCC by resistance R12, and negative pole stamps network label P12; The positive pole of light emitting diode HL3 meets VCC by resistance R13, and negative pole stamps network label P13.
12. PM2.5 concentration detectors according to claim 2, is characterized in that: the core devices of described reset circuit is 10uF/35V electrolytic condenser C1; The positive pole of electrolytic condenser C1 meets VCC, and the negative pole of electrolytic condenser C1 is by resistance R9 ground connection; Button J1 is connected in parallel on the two ends of electrolytic condenser C1; The negative pole of electrolytic condenser C1 stamps network label RST.
13. PM2.5 concentration detectors according to claim 3, is characterized in that: the core devices of described crystal oscillating circuit is crystal oscillator G1; The two ends of crystal oscillator G1 stamp network label X1, X2 respectively; One end of crystal oscillator G1 is by electric capacity C4 ground connection, and the other end is by electric capacity C5 ground connection.
14. PM2.5 concentration detectors according to claim 4, is characterized in that: described key circuit, its button K1 one end ground connection, and the other end meets VCC by resistance R18, and stamps network label P25 at the ungrounded end of button K1; Button K2 one end ground connection, the other end meets VCC by resistance R19, and stamps network label P26 at the ungrounded end of button K2; Button K3 one end ground connection, the other end meets VCC by resistance R20, and stamps network label P27 at the ungrounded end of button K3.
The 15. PM2.5 concentration detectors stated according to claim 5, is characterized in that: the main devices of the described interface circuit that downloads is connector J3, and the pin 1 of connector J3 meets VCC; Network label RXD, TXD are stamped in pin 2,3 distribution; Pin 4 ground connection.
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| CN201510175438.8A CN104749078A (en) | 2015-04-13 | 2015-04-13 | PM2.5 concentration detector |
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| CN201510175438.8A CN104749078A (en) | 2015-04-13 | 2015-04-13 | PM2.5 concentration detector |
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| WO2018023407A1 (en) * | 2016-08-02 | 2018-02-08 | 张阳 | Method for pushing information when issuing smog early warning and early warning device |
| CN106442242A (en) * | 2016-09-12 | 2017-02-22 | 苏州工业园区职业技术学院 | Sampling circuit of air quality detection instrument |
| CN106485281A (en) * | 2016-10-19 | 2017-03-08 | 葛嘉豪 | A kind of detection method of the Air haze class of pollution |
| CN108181217A (en) * | 2018-01-17 | 2018-06-19 | 攀枝花学院 | Detection of Air Quality circuit |
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Application publication date: 20150701 |