CN204740222U - Gaseous detector in room - Google Patents
Gaseous detector in room Download PDFInfo
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- CN204740222U CN204740222U CN201520382690.1U CN201520382690U CN204740222U CN 204740222 U CN204740222 U CN 204740222U CN 201520382690 U CN201520382690 U CN 201520382690U CN 204740222 U CN204740222 U CN 204740222U
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- mcu microprocessor
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- conversion
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Abstract
The utility model relates to a gaseous detector in room, including gaseous detection module, humiture detection module, MCU microprocessor, display module and voice module, gaseous detection module's output signal transmits AD conversion module to, the output signal of AD conversion module and temperature and humidity measurement module conveys to MCU microprocessor, MCU microprocessor respectively with display module, the two -way data communication of voice module, the utility model discloses choose for use the MQ138 formaldehyde sensor based on the electrochemistry principle to gather gaseous signal with MQ -5 gas sensor, its principle of MQ138 formaldehyde sensor is that the formaldehyde in the air takes place the oxidation reaction under the electrode, diffusion electrode current who produces and the formaldehyde in the air are directly proportional, through send MCU microprocessor behind the signal amplification circuit again after the AD conversion module conversion, detect and show gas strength and temperature/humidity information by the on -the -spot automatic control of MCU microprocessor, show and voice broadcast.
Description
Technical field
The utility model relates to the technical field of detector, particularly be a kind of room gas detecting instrument.
Background technology
Formaldehyde Pollution of Indoor Air and natural gas leakage larger to person health effect, the method overwhelming majority that standard specifies is chemical analysis, and the means of use are that laboratory analytical instrument mainly contains tintmeter, spectrophotometer, chemistry titration, gas phase and liquid chromatography.But these methods effort is time-consuming, cost is high, the low process of automaticity is complicated, most of process is that manual operation is difficult to accomplish the on-the-spot development controlled in real time along with sensor and computer technology, now there has been SCM Based air quality detector, and test test specification, resolution, precision, stability and to be near the mark requirement.
Utility model content
The purpose of this utility model is to provide a kind of room gas detecting instrument.
The utility model solves the technical scheme that its technical matters adopts: room gas detecting instrument, include gas detection module, Temperature and Humidity module, MCU microprocessor, display module and voice module, the output signal of described gas detection module is transferred to AD conversion module, the output signal of described AD conversion module and Temperature and Humidity module is sent to MCU microprocessor, described MCU microprocessor respectively with display module, voice module bidirectional data communication.
Further, described gas detection module adopts MQ-5 gas sensor and MQ138 formaldehyde sensor collection signal, and this signal is sent to AD conversion module through signal amplification circuit.
Further, described Temperature and Humidity module adopts DHT11 digital hygro sensor.
Further, described MCU microprocessor adopts AT89c51 single-chip microcomputer.
Further, described display module adopts LED display.
Further, described voice module is made up of the ISD400408 voice module connected successively, LM386 note amplifier and loudspeaker LS1.
By adopting above-mentioned technical scheme, the beneficial effects of the utility model are: the utility model is selected and gathered gas signal based on the MQ138 formaldehyde sensor of electrochemical principle and MQ-5 gas sensor, its principle of MQ138 formaldehyde sensor is that the formaldehyde in air under the electrodes oxidation reaction occurs, the diffusion electrode electric current produced is directly proportional to the concentration of formaldehyde in air, by sending MCU microprocessor again after AD conversion module conversion after signal amplification circuit, detected by on-the-spot automatically control of MCU microprocessor and shown gas concentration and humiture information, display is voice broadcast also.
Accompanying drawing explanation
Fig. 1 is frame assumption diagram of the present utility model;
Fig. 2 is circuit theory diagrams of the present utility model.
Embodiment
The utility model is further illustrated below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, room of the present utility model gas detecting instrument, include gas detection module, Temperature and Humidity module, MCU microprocessor, display module and voice module, the output signal of described gas detection module is transferred to AD conversion module, the output signal of described AD conversion module and Temperature and Humidity module is sent to MCU microprocessor, described MCU microprocessor respectively with display module, voice module bidirectional data communication.
As shown in Figure 2, described gas detection module adopts MQ-5 gas sensor and MQ138 formaldehyde sensor collection signal, this signal is sent to AD conversion module through signal amplification circuit, MQ-5 gas sensor is by miniature AL2O3 ceramic pipe, SnO2 sensitive layer, the sensitive element composition that potential electrode and well heater are formed, its principle of MQ138 formaldehyde sensor is that the formaldehyde in air under the electrodes oxidation reaction occurs, the diffusion electrode electric current produced is directly proportional to the concentration of formaldehyde in air, by sending AT89c51 single-chip microcomputer again after AD conversion module conversion after signal amplification circuit.
Described Temperature and Humidity module adopts DHT11 digital hygro sensor, and due to this built-in chip type AD conversion, output signal is required binary code.Signal pins is driven high through resistance R2 to VCC, and when exporting " 0 ", electric current flows into AT89c51 single-chip microcomputer, becomes low level with AT89c51 single-chip microcomputer connecting line.When exporting as " 1 ", be high level with AT89c51 single-chip microcomputer connecting line.Data are read from Temperature Humidity Sensor internal storage region by clock control by AT89c51 single-chip microcomputer, send after the process of AT89c51 single-chip microcomputer internal data to LED display display, LED display is shown as external display interface, and displaying contents is CO, Ch2O, the information such as humiture.
Described voice module is made up of the ISD400408 voice module connected successively, LM386 note amplifier and loudspeaker LS1.ISD400408 voice module adopts CMOS technology, includes crystal oscillator, antialiasing filter, smoothing filter, automatic silencing, audio-frequency power amplifier and high density many electrical level flash storage array.
Above-describedly be only a preferred embodiment of the present utility model, the scope that the utility model is implemented can not be limited, every equalization change of doing according to the utility model claim and decoration, all should still belong in scope that the utility model contains.
Claims (6)
1. room gas detecting instrument, it is characterized in that: include gas detection module, Temperature and Humidity module, MCU microprocessor, display module and voice module, the output signal of described gas detection module is transferred to AD conversion module, the output signal of described AD conversion module and Temperature and Humidity module is sent to MCU microprocessor, described MCU microprocessor respectively with display module, voice module bidirectional data communication.
2. room according to claim 1 gas detecting instrument, its feature exists: described gas detection module adopts MQ-5 gas sensor and MQ138 formaldehyde sensor collection signal, and this signal is sent to AD conversion module through signal amplification circuit.
3. room according to claim 1 and 2 gas detecting instrument, its feature exists: described Temperature and Humidity module adopts DHT11 digital hygro sensor.
4. room according to claim 1 gas detecting instrument, its feature exists: described MCU microprocessor adopts AT89c51 single-chip microcomputer.
5. room according to claim 1 gas detecting instrument, its feature exists: described display module adopts LED display.
6. room according to claim 1 gas detecting instrument, its feature exists: described voice module is made up of the ISD400408 voice module connected successively, LM386 note amplifier and loudspeaker LS1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520382690.1U CN204740222U (en) | 2015-06-04 | 2015-06-04 | Gaseous detector in room |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520382690.1U CN204740222U (en) | 2015-06-04 | 2015-06-04 | Gaseous detector in room |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204740222U true CN204740222U (en) | 2015-11-04 |
Family
ID=54421953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520382690.1U Expired - Fee Related CN204740222U (en) | 2015-06-04 | 2015-06-04 | Gaseous detector in room |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204740222U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105842310A (en) * | 2016-05-23 | 2016-08-10 | 南宁市茂百科技有限公司 | Portable formaldehyde tester |
| CN106290739A (en) * | 2016-08-30 | 2017-01-04 | 江苏艾倍科科技股份有限公司 | A kind of indoor formaldehyde concentration monitoring system based on photovoltaic generation |
-
2015
- 2015-06-04 CN CN201520382690.1U patent/CN204740222U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105842310A (en) * | 2016-05-23 | 2016-08-10 | 南宁市茂百科技有限公司 | Portable formaldehyde tester |
| CN106290739A (en) * | 2016-08-30 | 2017-01-04 | 江苏艾倍科科技股份有限公司 | A kind of indoor formaldehyde concentration monitoring system based on photovoltaic generation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151104 Termination date: 20160604 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |