CN206177926U - Indoor air quality tester - Google Patents
Indoor air quality tester Download PDFInfo
- Publication number
- CN206177926U CN206177926U CN201621240103.6U CN201621240103U CN206177926U CN 206177926 U CN206177926 U CN 206177926U CN 201621240103 U CN201621240103 U CN 201621240103U CN 206177926 U CN206177926 U CN 206177926U
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- China
- Prior art keywords
- fixed value
- chip
- led display
- air quality
- value resistance
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The utility model discloses an indoor air quality tester, including the detector body, the LED display screen is installed on the upper portion of detector body, and formaldehyde sensor and TVOC sensor are installed respectively to the both sides end of LED display screen, and alarm indicator is installed to the lower extreme of LED display screen, and the inner chamber of detector body is provided with the circuit board, is provided with motor -drive circuit and supervisory circuits on the circuit board, last singlechip chip, AD conversion chip and the display chip of installing of motor -drive circuit. This indoor air quality tester through setting up the content that air matter level sensor can detect some harmful gas in the air, conveys among the display chip again to through display chip with the data display on the LED display screen, detection efficiency is higher, the numerical value that detects simultaneously exceedes the safe numerical value of setting for, can automatic alarm, guarantee workman's life safety.
Description
Technical field
This utility model is related to testing equipment technical field, specially a kind of determining instrument of indoor air quality.
Background technology
With the development and the progress of science and technology of human society, people increasingly pay attention to the air quality of oneself living environment.
However, the air quality problems being on the rise have become global disaster, the body for spreading unchecked the directly harm people of atmospheric pollution
Heart health, and bring huge threat to economic growth and social progress.What now people were more deep recognizes air quality
Material impact of the situation to live and work, in current weather forecast program, much has been added in the pre- of Air Quality
Report, in order to people outdoor Air Quality is grasped.
When people are while outdoor quality condition is paid attention to, IAQ (indoor air quality) situation is but more despised, it is believed that Interior Space
Makings amount is good, and in fact really not so, the air quality in its office affects to a great extent their healthy.
But it is at present also universal for the monitoring situation of these local inner air quality, to air in the formaldehyde for retaining and
The standard that the material being detrimental to health also is not detected, it is therefore desirable to a kind of indoor monitoring instrument is set, it is ensured that air quality, is carried
The life security of high employee.
Utility model content
The purpose of this utility model is to provide a kind of determining instrument of indoor air quality, harmful with automatic detection formaldehyde etc.
The characteristics of material, efficiency high, solve the problems, such as to be solved in above-mentioned background technology.
For achieving the above object, this utility model provides following technical scheme：A kind of determining instrument of indoor air quality, including
Detector body, the top of the detector body is provided with LED display, and the two side ends of LED display are respectively mounted free
Makings quantity sensor, LED display lower end is provided with regulation button, and the lower end for adjusting button is provided with power control switch and report
Alert display lamp；The inner chamber of the detector body is provided with circuit board, the outfan of circuit board respectively with LED display, air
Mass sensor, regulation button and alarm lamp are electrically connected with, and motor-drive circuit and supervisory circuit are provided with circuit board；
Singlechip chip, A/D conversion chips and display chip, one end pin of singlechip chip are installed on the motor-drive circuit
It is electrically connected with display chip, the other end pin of singlechip chip is electrically connected with one end pin of A/D conversion chips, A/D
The other end pin of conversion chip is electrically connected with air mass sensor, is also connected on one end pin of singlechip chip
Controllable regulated power supply is connected to, controllable regulated power supply is electrically connected with power control switch；Definite value is provided with the supervisory circuit
Resistance R1, R2 and R3, electric capacity C1 and C2, amplifier IC1 and isolating diode VD, one end of fixed value resistance R1 is connected to air matter
On quantity sensor 12, the other end of fixed value resistance R1 is parallel with electric capacity C1 and fixed value resistance R2, and on fixed value resistance R2 electricity is parallel with
Hold C2, and be connected on the reverse input end of amplifier IC1, fixed value resistance R3 is connected with the positive input of amplifier IC1,
Fixed value resistance R3 is grounded；The outfan of the amplifier IC1 is defeated with isolating diode VD, alarm lamp and electric capacity C1, C2's
Go out end in parallel, and be connected respectively on the terminal of air mass sensor；Between the isolating diode VD and alarm lamp
It is serially connected.
Preferably, the alarm lamp is the electrical device with voice broadcast and blinking red lamp.
Preferably, the electric capacity C1 and C2 is anti-tampering electric capacity.
Compared with prior art, the beneficial effects of the utility model are as follows：
Determining instrument of indoor air quality of the present utility model, can be detected in air by arranging air mass sensor
The content of some harmful gass, such as formaldehyde, stupid and ammonia etc., air mass sensor turns detection signal Jing A/D conversion chips
It is transferred to after changing on singlechip chip and is processed, then be sent in display chip, and data display is existed by display chip
On LED display, during this, data can be compared with setting value, after exceeding, alarm lamp can be made to report to the police, and make work
Make personnel to take measures in time, to ensure safety of workers, it is also automatic detection in detection process, need to only be placed sensor
In room, detection efficiency is compared higher during manual detection.
Description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is that network of the present utility model controls connection figure；
Fig. 3 is circuit fundamental diagram of the present utility model.
In figure：1 detector body, 11LED display screens, 12 air mass sensors, 13TVOC sensors 13 adjust button,
14 power control switch, 15 alarm lamps, 2 circuit boards, 3 motor-drive circuits, 31 singlechip chips, 32A/D conversion chips,
33 display chips, 4 supervisory circuits, 41 infrarede emitting diodes, 5 controllable regulated power supplys.
Specific embodiment
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of this utility model, rather than whole
Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment for being obtained, belongs to the scope of this utility model protection.
Fig. 1-3, a kind of determining instrument of indoor air quality, including detector body 1 are referred to, the detector body 1
Top is provided with LED display 11, and the two side ends of LED display 11 are separately installed with air mass sensor 12, air quality
Sensor 12 can detect the air quality in room, and the content of the harmful gass such as formaldehyde, stupid and ammonia is detected at any time, be passed through
LED display 11 shows, so that people adjust in time and improve air, reaches the standard to health, LED display
11 lower ends are provided with regulation button 13, and adjusting button 13 can adjust the limit value of sensor detection, to adjust at any time not
Examination criteria with the case of, the purpose of being optimal, the lower end for adjusting button 13 is provided with power control switch 14 and report
Alert display lamp 15, electrical device of the alarm lamp 15 with voice broadcast and blinking red lamp, when detecting the first in whole room
When the content value of the harmful gass such as aldehyde, stupid and ammonia is above standard, alarm lamp 15 will produce the effect of alarm lamp flicker, language
Sound reports out detected numerical value；The inner chamber of the detector body 1 is provided with circuit board 2, the outfan difference of circuit board 2
It is electrically connected with LED display 11, air mass sensor 12, regulation button 13 and alarm lamp 15, air quality sensing
After the completion of device 12 is detected, it is transported on LED display 11 by circuit board 2, when detected value exceedes setting value, alarm lamp
15 can produce alarm function, conversely, would not report to the police, motor-drive circuit 3 and supervisory circuit 4 are provided with circuit board 2；It is described
Singlechip chip 31, A/D conversion chips 32 and display chip 33 be installed on motor-drive circuit 3, the one of singlechip chip 31
End pin is electrically connected with display chip 33, the other end pin of singlechip chip 31 and one end pin of A/D conversion chips 32
It is electrically connected with, the other end pin of A/D conversion chips 32 is electrically connected with air mass sensor 12, singlechip chip
Controllable regulated power supply 5 is also associated with 31 one end pin, controllable regulated power supply 5 is electrically connected with power control switch 14；Need
To pass through the conversion of A/D conversion chips 32, be transmitted on singlechip chip 31, be then transferred to by display chip 33
On LED display 11, the numerical value for detecting is shown；Controllable voltage stabilizing is also associated with one end pin of singlechip chip 31
Power supply 5, controllable regulated power supply 5 is electrically connected with power control switch 15, and controllable voltage stabilizing is controlled by power control switch 15
The power supply situation of power supply 5 so as to singlechip chip 31 is carried out and is powered, reach the purpose for voluntarily controlling；Arrange in supervisory circuit 4
There are fixed value resistance R1, R2 and R3, electric capacity C1 and C2, amplifier IC1 and isolating diode VD, one end of fixed value resistance R1 is connected to
On air mass sensor 12, the other end of fixed value resistance R1 is parallel with electric capacity C1 and fixed value resistance R2, on fixed value resistance R2 simultaneously
Electric capacity C2 is associated with, and is connected on the reverse input end of amplifier IC1, on the positive input of amplifier IC1 definite value is connected with
Resistance R3, fixed value resistance R3 are grounded；The outfan of amplifier IC1 and isolating diode VD, alarm lamp 15 and electric capacity C1, C2
Outfan it is in parallel, and be connected respectively on the terminal of air mass sensor 12；Isolating diode VD and alarm lamp 15
Between be serially connected, alarm lamp 15 is the electrical device with voice broadcast and blinking red lamp, and electric capacity C1 and C2 are anti-dry
Disturb electric capacity.
Operation principle：Under normal circumstances, monitored environmental air is clean, that is, endanger gas and be no more than setting value
When, infrarede emitting diode 41 is lighted with the initial current for mixing up in advance, and phototriode by illumination resistance because being reduced so that electricity
Road electric current increase, this electric current flows through infrarede emitting diode 41 makes its luminous intensity increase, and re-radiation is to phototriode so as to
Resistance is less, and so circulation defines strong positive feedback process, and the electric current of series circuit rapidly rises to maximum, air matter
Quantity sensor 12 can detect the content of some harmful gass in air, such as formaldehyde, stupid and ammonia etc., certainly in normal condition
Under, the positive input of amplifier IC1 is 0 so that forward end is short with backward end void, and it is identical that whole circuit flows through electric current, process
Electric capacity C1, in returning to air mass sensor 12, and detects after these signals, can convert thereof into the signal of telecommunication, transmission
To in fixed value resistance R1, then by fixed value resistance R2, due to conversion after, it is forward and reverse between voltage there is difference, because
This defines amplification, and the signal of telecommunication is transmitted across into alarm lamp 15 through isolating diode VD by outfan, completes inspection
The warning function surveyed after signal.
The low current signal of correspondence gas concentration is obtained by air mass sensor 12, then by a kind of new height
Precision signal process circuit and based on the analog to digital conversion circuit of FPGA obtain correspondence gas initial concentration value, with reference to indoor environment
Air pressure, humiture situation and correction algorithm obtain more accurately concentration value. and also there is the instrument concentration over-standard to report to the police, measurement data
The functions such as printout and accuracy of detection are high, speed is fast, good stability, it is easy to carry the advantages of.
To sum up：After by pressing power control switch 14, detector body 1 enters normal operating conditions, and operator can
, by the limit value of the control and regulation setting sensor detection process of button 13, now passed by air quality with varied situations
The numerical value that sensor 12 is detected is transferred on singlechip chip 31 after the conversion of A/D conversion chips 32 and is processed, then is transmitted
To in display chip 33, and there is display chip 33 by data display on LED display 11, during this, data can be with setting
Value is compared, and after exceeding, alarm lamp 15 can be made to report to the police, and makes staff take measures in time, to ensure that workman pacifies
Entirely.
While there has been shown and described that embodiment of the present utility model, for the ordinary skill in the art,
It is appreciated that these embodiments can be carried out various changes in the case of without departing from principle of the present utility model and spirit, repaiies
Change, replace and modification, scope of the present utility model is defined by the appended claims and the equivalents thereof.
Claims (3)
1. a kind of determining instrument of indoor air quality, including detector body (1), it is characterised in that：The detector body (1)
Top is provided with LED display (11), and the two side ends of LED display (11) are separately installed with air mass sensor (12), LED
Display screen (11) lower end is provided with regulation button (13), and the lower end for adjusting button (13) is provided with power control switch (14) and report
Alert display lamp (15)；The inner chamber of the detector body (1) is provided with circuit board (2), the outfan of circuit board (2) respectively with
LED display (11), air mass sensor (12), regulation button (13) and alarm lamp (15) are electrically connected with, circuit board
(2) motor-drive circuit (3) and supervisory circuit (4) are provided with；Singlechip chip is installed on the motor-drive circuit (3)
(31), A/D conversion chips (32) and display chip (33), one end pin of singlechip chip (31) is with display chip (33) electrically
Connection, the other end pin of singlechip chip (31) is electrically connected with one end pin of A/D conversion chips (32), A/D conversion cores
The other end pin of piece (32) is electrically connected with air mass sensor (12), one end pin of singlechip chip (31)
On be also associated with controllable regulated power supply (5), controllable regulated power supply (5) is electrically connected with power control switch (14)；The monitoring
Fixed value resistance R1, R2 and R3, electric capacity C1 and C2, amplifier IC1 and isolating diode VD, fixed value resistance are provided with circuit (4)
One end of R1 is connected on air mass sensor (12), and the other end of fixed value resistance R1 is parallel with electric capacity C1 and fixed value resistance
R2, is parallel with electric capacity C2 on fixed value resistance R2, and is connected on the reverse input end of amplifier IC1, and amplifier IC1's is positive defeated
Enter and fixed value resistance R3 is connected with end, fixed value resistance R3 ground connection；The outfan of the amplifier IC1 and isolating diode VD, report
The outfan of alert display lamp (15) and electric capacity C1, C2 is in parallel, and is connected respectively on the terminal of air mass sensor (12)；Institute
State and be serially connected between isolating diode VD and alarm lamp (15).
2. a kind of determining instrument of indoor air quality according to claim 1, it is characterised in that：The alarm lamp (15)
It is the electrical device with voice broadcast and blinking red lamp.
3. a kind of determining instrument of indoor air quality according to claim 1, it is characterised in that：The electric capacity C1 and C2 is anti-
Interference capacitors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621240103.6U CN206177926U (en) | 2016-11-18 | 2016-11-18 | Indoor air quality tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621240103.6U CN206177926U (en) | 2016-11-18 | 2016-11-18 | Indoor air quality tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206177926U true CN206177926U (en) | 2017-05-17 |
Family
ID=58685340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621240103.6U Expired - Fee Related CN206177926U (en) | 2016-11-18 | 2016-11-18 | Indoor air quality tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206177926U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108020270A (en) * | 2018-02-01 | 2018-05-11 | 攀枝花学院 | Detection of Air Quality circuit |
| CN108226393A (en) * | 2017-12-27 | 2018-06-29 | 合肥睿致新科技有限公司 | A kind of Household vertical air quality detector |
-
2016
- 2016-11-18 CN CN201621240103.6U patent/CN206177926U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108226393A (en) * | 2017-12-27 | 2018-06-29 | 合肥睿致新科技有限公司 | A kind of Household vertical air quality detector |
| CN108020270A (en) * | 2018-02-01 | 2018-05-11 | 攀枝花学院 | Detection of Air Quality circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170517 Termination date: 20211118 |