CN206756783U - A kind of TVOC monitoring terminals of controllable constant humidity - Google Patents
A kind of TVOC monitoring terminals of controllable constant humidity Download PDFInfo
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- CN206756783U CN206756783U CN201720561259.2U CN201720561259U CN206756783U CN 206756783 U CN206756783 U CN 206756783U CN 201720561259 U CN201720561259 U CN 201720561259U CN 206756783 U CN206756783 U CN 206756783U
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- tvoc
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Abstract
A kind of TVOC monitoring terminals of controllable constant humidity, including detection part and control circuit, it is characterised in that：The detection part includes collection cavity, collection pump and TVOC sensors, air inlet, sensing hole and gas outlet are provided with the collection cavity, dehumidification module is provided with the air inlet, Temperature Humidity Sensor is provided with the sensing hole, the gas outlet connects with collection pump；The TVOC sensors are fixed on collection cavity and sensor probe stretches into collection inside cavity, and TVOC sensors, dehumidification module and the Temperature Humidity Sensor are connected with control circuit.The utility model compact structure, it is easy to use, can be widely applied to various places, can be in the TVOC contents during air is accurately detected in the case that humidity is unstable, solve TVOC sensor probes is easily influenceed by humidity, so as to cause detection result inaccuracy the problem of.
Description
Technical field
It the utility model is related to air detection instrument, and in particular to a kind of TVOC monitoring terminals of controllable constant humidity.
Background technology
Total volatile organism TVOC refers to that saturated vapour pressure at room temperature has exceeded 133.32pa organic matter, and its boiling point exists
50 DEG C to 250 DEG C, the form that can be evaporated at normal temperatures is present in air, its toxicity, excitant, carcinogenicity and special
It is odor profiles, skin and mucous membrane can be influenceed, acute damage is produced to human body.TVOC source outdoor essentially from fuel combustion and
Communications and transportation, and indoors then essentially from combustion product, smoking, heating and the cookings such as coal-fired and natural gas etc. smog and build
Build with the adhesive in ornament materials, coating, paint, sheet material, wallpaper etc.；Indoors in decoration process, TVOC is essentially from oil
Paint, coating and adhesive.It is reported that indoor TVOC concentration is generally in 0.2mg/m3To 2mg/m3Between, and in improper decoration construction
In, or even decades of times can be higher by.It is generally believed that normal, subcommercial indoor environment TVOC concentration levels are also unlikely to lead
Cause the tumour and cancer of human body.TVOC can have odor, irritant, and some compounds have genotoxicity, when TVOC is dense
Spend for 3.0-25mg/m3When, stimulation and uncomfortable can be produced, during with other factors synergy, in fact it could happen that headache；When TVOC is dense
Degree is more than 25 mg/m3When, in addition to headache, in fact it could happen that other neurotoxic effects.TVOC excessive concentrations can cause body to be exempted from
Epidemic disease off-leveling, central nervous system function is influenceed, the subjective symptoms such as dizzy, headache, drowsiness, powerless, uncomfortable in chest occurs, it is also possible to
Influence digestive system, poor appetite, nausea etc. occur, when serious can liver injury and hemopoietic system, there is allergy etc., institute
It is very necessary to prevent from being exposed in high concentration TVOC environment, but the TVOC detectors of main flow mainly pass through gas at present
Sampling pump gathers gas to detect, and this detection mode can more accurately detect air in the case of humidity is metastable
In TVOC contents, but for TVOC detection sensor probe easily influenceed by humidity, so as to cause detection result forbidden
The problem of true.
Utility model content
For the problems of in the prior art, the utility model provides a kind of TVOC monitorings of controllable constant humidity eventually
End, the sensor probe for solving current TVOC detection are influenceed by humidity, the problems such as so as to cause the result inaccuracy of detection.
To achieve the above object, present invention employs following technical scheme：
The utility model proposes a kind of TVOC monitoring terminals of controllable constant humidity, including detection part and control circuit, institute
Stating detection part includes collection cavity, collection pump and TVOC sensors, is provided with air inlet, sensing hole on the collection cavity and goes out
Gas port, dehumidification module is provided with the air inlet, Temperature Humidity Sensor, the gas outlet and collection pump are provided with the sensing hole
Connection；The TVOC sensors are fixed on collection cavity and sensor probe stretches into collection inside cavity, the TVOC sensings
Device, dehumidification module and Temperature Humidity Sensor are connected with control circuit.
Further, the collection cavity is provided with the groove to match with dehumidification module, the acquisition cavity at air inlet
Body is provided with the rectangular channel to match with Temperature Humidity Sensor at sensing hole.
Further, the collection cavity is provided with multiple installation pylons for being used to fix TVOC sensors, the TVOC
Sensor is provided with step cutting pattern land on the end face away from TVOC sensor probes, and the TVOC sensors are in step cutting pattern
Land one end is provided with pressure strip, and the pressure strip is by being connected in step cutting pattern land and affixed by TVOC with installation pylon
Sensor is fixed.
Further, the mounting post number of units amount is 3, and the installation pylon is bolted with pressure strip.
Further, it is provided with sealing ring between the dehumidification module and collection cavity.
Further, the TVOC sensors, dehumidification module and Temperature Humidity Sensor connection has control circuit, the control
Circuit processed includes MCU processors, EEPROM and wireless module, the MCU processors collection moisture signal and TVOC signals, and deposits
Store up EEPROM；The wireless module is by USART interfaces and MCU processor bidirectional data communications, the wireless biography for data
Defeated and reception.
Further, the TVOC sensors use output energy as 10.6evPID photoion sensors,
Further, the Temperature Humidity Sensor is using SHT15 Temperature Humidity Sensors.
Further, the MCU processors are low-power consumption STM32L151 single-chip microcomputers.
Technical principle of the present utility model is that collection pump is operated, and outside air enters collection cavity by air inlet
Inside, Temperature Humidity Sensor detect the air humidity in acquisition cavity body by sensing hole, and inside cavity humidity is gathered when detecting
When within the scope of being set in MCU processors, MCU processors control TVOC sensors start in acquisition cavity body
The air in portion is detected, and is transferred to MCU processors and is handled, and MCU processors can be to the TVOC and humidity in air
Data are acquired, transmit, stored, and when the humidity in acquisition cavity body is too high, MCU processors control dehumidification module starts
Air in acquisition cavity body is dehumidified, the principle of dehumidification module, which is, to be hydrogen molecule and oxygen point by water-molecule dissociation
Son；Oxygen molecule in hydrogen molecule and free electron and dehumidification module external environment condition combines generation hydrone；So as to enter
Enter the hydrone gathered in cavity to remove, reach the humidity for reducing air in acquisition cavity body, when the air in acquisition cavity body is wet
When degree has been reached within the humidity range of MCU processors setting, MCU processors control TVOC sensors start in acquisition cavity body
Air detected, and be transferred to MCU processors and handled, MCU processors can be to the TVOC and humiture in air
Data are acquired, transmit, stored, and the situation in Real-time Feedback detection place is to server admin platform.
Usefulness of the present utility model is：Compact structure, it is easy to use, can be widely applied to various places, Neng Gou
The TVOC contents in air are accurately detected in the case that humidity is unstable, solve the sensor probe for TVOC detections
Easily influenceed by humidity, so as to cause detection result inaccuracy the problem of.
Brief description of the drawings
Fig. 1 is detection part overall structure diagram of the present utility model；
Fig. 2 is detection part decomposition texture schematic diagram of the present utility model；
Fig. 3 is collection cavity structural representation of the present utility model.
Specific reference is as follows：1st, cavity is gathered, 101, groove, 102, rectangular recess, 103, gas outlet, 2, collection
Pump, 3, Temperature Humidity Sensor, 4, TVOC sensors, 5, dehumidification module, 6, sealing ring, 7, pressure strip, 8, signal connecting plate, 9, peace
Fill pylon
Embodiment
1-3 and preferred embodiment are further described with regard to the technical solution of the utility model below in conjunction with the accompanying drawings.
The utility model provides a kind of TVOC monitoring terminals of controllable constant humidity, including collection cavity 1, gathers on cavity 1
Air inlet, sensing hole and gas outlet 103 are provided with, what is set at air inlet has dehumidification module 5, is additionally provided with and dehumidification module 5
The groove 101 that size matches so that detection part seems more succinct, clean, and dehumidification module 5 is bolted to acquisition cavity
On body 1, what is set between dehumidification module 5 and the collection connection of cavity 1 has sealing ring 6, sets the effect of sealing ring 6 mainly to protect
The seal of whole device is demonstrate,proved, is improved the operating efficiency of collection pump 2, sensing hole is provided with collection cavity 1 top, is sensing
Sensor 3 is provided with hole, the rectangular channel 102 that the size of Temperature Humidity Sensor 3 matches is additionally provided with, whole detection part can be caused
It is more attractive in appearance, it is not burdensome, by sensing hole Temperature Humidity Sensor 3 can be made to detect the air humidity inside collection cavity 1,
TVOC sensors 4 are fixed on collection cavity 1, the bore size size at the middle part of collection cavity 1 and the size phase of TVOC sensors 4
Matching, the probe of TVOC sensors 4 have been stretched into inside collection cavity 1 so that and it can detect the air inside collection cavity 1,
The three installation pylons 9 for having fixed TVOC sensors 4 set on collection cavity 1, TVOC sensors 4 are visited away from TVOC sensors 4
The end face of head is provided with step cutting pattern land, and what TVOC sensors 4 were set in step cutting pattern land one end has solid with installation pylon 9
The pressure strip 7 connect, pressure strip 7 is by being connected in step cutting pattern land, and pressure strip 7 and the installation bolt connection of pylon 9,
So as to have the function that to be fixed TVOC sensors 4, there is circular hole what the centre of pressure strip 7 was opened, TVOC can be allowed to pass
The pin of sensor 4 is passed through, and the circular hole of the pin of TVOC sensors 4 through pressure strip 7 is connected with signal connecting plate 8, and control can be made electric
Road is controlled to TVOC sensors 4, and a relief hole is also provided with collection cavity 1, prevents from gathering the air pressure mistake in cavity 1
Big or too small damage Temperature Humidity Sensor 3 or TVOC sensors 4, so as to have influence on Temperature Humidity Sensor 3 or TVOC sensors 4
Measurement accuracy.
Control circuit includes MCU processors, EEPROM and wireless module, the TVOC of MCU processors collection TVOC sensors 4
The moisture signal of signal and Temperature Humidity Sensor 3, and store data into EEPROM, it is laggard that MCU processors receive signal
Row is handled and by real-time storage after humidity data and TVOC data processings into EEPROM, prevents loss of data caused by power down.
Wireless module is by USART interfaces and MCU processor bidirectional data communications, being wirelessly transferred and receiving for data, wherein
USART interfaces are a full duplex universal synchronous/asynchronous serial transceiver modules, and the interface is the serial communication of a high flexible
Equipment, it is ensured that the quick and accuracy of data exchange.MCU processors pass through data while data storage is carried out
Wireless module is transferred in radio network gateway, then passes through network transmission to server admin platform.Server admin platform feedback system
System real-time time information is calibrated to MCU processors, MCU processors to its temporal, to ensure to transmit the real-time of data.
TVOC in air and humidity data are acquired, transmit, stored, the situation in Real-time Feedback detection place is to server pipe
Platform.
In the further preferred scheme of the present embodiment, TVOC sensors 4 use PID photoion sensors, PID light from
The output energy of PID lamps used in sub- sensor is 10.6ev, and the principle of PID photoion sensors is to have used a uviol lamp
(UV) light source breaks into organic matter the negative ions (ionization) that can be detected by the detector, and can detect in most air
Gas, such as benzene homologues such as benzene,toluene,xylene, methanol, ethanol alcohol, acetone, phenolic aldehyde, raw material of industry methanol, dichloromethane
Alkane, they can be output the PID photoion sensors that energy is 10.6ev and measure, moreover it is possible to detect hydrogen sulfide h2s, ammonia
NH3, nitric oxide NO, nitrogen dioxide NO2.
In the further preferred scheme of the present embodiment, Temperature Humidity Sensor 3 passes using SHT15 sensors, SHT15
Sensor is the sensor of the quasi- numeral output relative humidity of a monolithic whole school being made up of multiple sensor assemblies and temperature, and it is adopted
With distinctive technical grade CMOS technology, ensure that high reliability and remarkable long-time stability, and with high accuracy,
High integration, small size, exchange, be swift in response entirely, low-power consumption the advantages that.
In the further preferred scheme of the present embodiment, MCU processors are low-power consumption STM32L151 single-chip microcomputers.
STM32L151 single-chip microcomputers have super low-power consumption, have a 10uA low power operation pattern, and power supply voltage range can 1.65~
3.6V, adaptive temperature scope are -40 DEG C to 105 DEG C, and ensure that can be in the needs that low temperature environment is operated, it is most important that
Chip has STOP park modes, is arranged to periodically wake up work, so that power consumption be preferably minimized, saves electric energy, make be
Run duration of uniting is longer.
Technical principle of the present utility model is that collection pump 2 is started working, because gas outlet of the collection pump 2 with gathering cavity 1
Connection, so when collection pump 2 works, outside air is entered inside collection cavity 1 by air inlet, and Temperature Humidity Sensor 3 is logical
Cross sensing hole to start to detect the air humidity in collection cavity 1, when the humidity detected is in the model being set in MCU processors
When within enclosing, MCU processors control TVOC sensors 4 proceed by be detected to the air in collection cavity 1, and
It is transferred to MCU processors to be handled, MCU processors are acquired the TVOC in air and humidity data, transmit, deposited
Storage, when Temperature Humidity Sensor 3 detect collection cavity 1 inside humidity it is too high when, MCU processors control dehumidification module 5
Start to dehumidify to the air inside collection cavity 1, the principle of dehumidification module 5, which is, to be hydrogen molecule by water-molecule dissociation
And oxygen molecule；Oxygen molecule in hydrogen molecule and the external environment condition of free electron and dehumidification module 5 combines generation moisture
Son；Removed so as to which the hydrone gathered in cavity 1 will be entered, reached the humidity for reducing air in collection cavity 1, worked as acquisition cavity
Air in body 1 gathers air humidity in cavity 1 and reached within the humidity range of MCU processors setting after processing
When, MCU processors control TVOC sensors 4 proceed by be detected to the air in collection cavity 1, and is transferred at MCU
Reason device is handled, and MCU processors can be acquired to the TVOC in air and data of the Temperature and Humidity module, transmit, store, anti-in real time
The situation in feedback detection place is to server admin platform.Can be in the case where humidity be unstable accurately by such mode
The TVOC contents in air are detected, solve easily is influenceed for the sensor probe of TVOC detections by humidity, so as to cause to detect
Result inaccuracy the problem of.And the utility model does not have to be powered to TVOC sensors 4 always, so that whole device
Power consumption is smaller, enables to the battery powered time longer, greatly reduces power consumption levels and is adapted to various environment bars
The TVOC of part detection.
Above-described is only principle of the present utility model and preferred embodiment.It should be pointed out that the common skill to this area
For art personnel, on the premise of the utility model principle is not departed from, moreover it is possible to make some variations and modifications, should be regarded as belonging to yet
In the scope of protection of the utility model.
Claims (9)
1. a kind of TVOC monitoring terminals of controllable constant humidity, including detection part and control circuit, it is characterised in that：The test section
Part includes collection cavity, collection pump and TVOC sensors, and air inlet, sensing hole and gas outlet, institute are provided with the collection cavity
State and dehumidification module is provided with air inlet, Temperature Humidity Sensor is provided with the sensing hole, the gas outlet connects with collection pump；Institute
State that TVOC sensors are fixed on collection cavity and sensor probe stretches into collection inside cavity, the TVOC sensors, dehumidifying
Module and Temperature Humidity Sensor are connected with control circuit.
A kind of 2. TVOC monitoring terminals of controllable constant humidity according to claim 1, it is characterised in that:The collection cavity exists
The groove to match with dehumidification module is provided with air inlet, the collection cavity is provided with and Temperature Humidity Sensor phase at sensing hole
The rectangular channel of matching.
A kind of 3. TVOC monitoring terminals of controllable constant humidity according to claim 1, it is characterised in that:On the collection cavity
Provided with multiple installation pylons for being used to fix TVOC sensors, the TVOC sensors are in the end face away from TVOC sensor probes
Step cutting pattern land is provided with, the TVOC sensors are provided with pressure strip in step cutting pattern land one end, and the pressure strip passes through
It is connected in step cutting pattern land and pylon is affixed is fixed TVOC sensors with installation.
A kind of 4. TVOC monitoring terminals of controllable constant humidity according to claim 3, it is characterised in that:The mounting post number of units
Measure as 3, the installation pylon is bolted with pressure strip.
A kind of 5. TVOC monitoring terminals of controllable constant humidity according to claim 1, it is characterised in that:The dehumidification module with
Sealing ring is provided between collection cavity.
A kind of 6. TVOC monitoring terminals of controllable constant humidity according to claim 1, it is characterised in that:The control circuit bag
MCU processors, EEPROM and wireless module, the MCU processors collection moisture signal and TVOC signals are included, and stores and arrives
EEPROM；The wireless module by USART interfaces and MCU processor bidirectional data communications, for data be wirelessly transferred with
Receive.
A kind of 7. TVOC monitoring terminals of controllable constant humidity according to claim 1, it is characterised in that：The TVOC sensors
Use photoion sensor of the output energy for 10.6evPID.
A kind of 8. TVOC monitoring terminals of controllable constant humidity according to claim 1, it is characterised in that：The temperature and humidity sensing
Device is using SHT15 Temperature Humidity Sensors.
A kind of 9. TVOC monitoring terminals of controllable constant humidity according to claim 6, it is characterised in that：The MCU processors
For low-power consumption STM32L151 single-chip microcomputers.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720561259.2U CN206756783U (en) | 2017-05-19 | 2017-05-19 | A kind of TVOC monitoring terminals of controllable constant humidity |
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| CN201720561259.2U CN206756783U (en) | 2017-05-19 | 2017-05-19 | A kind of TVOC monitoring terminals of controllable constant humidity |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109507011A (en) * | 2018-11-19 | 2019-03-22 | 汇众翔环保科技股份有限公司 | A kind of monitoring of volatile organic matter and alarm system |
| CN109959759A (en) * | 2017-12-25 | 2019-07-02 | 研能科技股份有限公司 | The detection alarming method for power of volatile organic compounds |
-
2017
- 2017-05-19 CN CN201720561259.2U patent/CN206756783U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109959759A (en) * | 2017-12-25 | 2019-07-02 | 研能科技股份有限公司 | The detection alarming method for power of volatile organic compounds |
| CN109507011A (en) * | 2018-11-19 | 2019-03-22 | 汇众翔环保科技股份有限公司 | A kind of monitoring of volatile organic matter and alarm system |
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