CN203101273U - Portable formaldehyde concentration detecting device - Google Patents
Portable formaldehyde concentration detecting device Download PDFInfo
- Publication number
- CN203101273U CN203101273U CN 201320080469 CN201320080469U CN203101273U CN 203101273 U CN203101273 U CN 203101273U CN 201320080469 CN201320080469 CN 201320080469 CN 201320080469 U CN201320080469 U CN 201320080469U CN 203101273 U CN203101273 U CN 203101273U
- Authority
- CN
- China
- Prior art keywords
- formaldehyde
- concentration
- optical sensor
- voltage signal
- portable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The utility model discloses a portable formaldehyde concentration detecting device. The portable formaldehyde concentration detecting device comprises a drawing fan, a transparent container, photo sensors, a light emitting diode (LED), a microprocessor and a display device, wherein the drawing fan is used for absorbing the air to be detected; the transparent container is used for storing a phenol reagent solution, and formaldehyde in the air is reacted with the phenol reagent solution to generate piperazine; the quantity of the photo sensors is two, one photo sensor is used for detecting the reflected light of the solution color after the reaction and converting the reflected light to a voltage signal, and the other photo sensor is used as a reference; the LED is used for providing the illumination for the photo sensor to detect the solution color; the microprocessor is used for processing the voltage signal transmitted by the photo sensor; and the display device is used for displaying a numerical value of the formaldehyde concentration. The portable formaldehyde concentration detecting device has the beneficial effects that the formaldehyde concentration in the air of a given volume can be precisely and rapidly calculated, and portability can be realized.
Description
Technical field
The utility model relates to the technical field of harmful gas detection, is specifically related to a kind of portable concentration of formaldehyde pick-up unit.
Background technology
Formaldehyde (HCHO) is a kind of colourless at normal temperatures, and the gas of penetrating odor is arranged, soluble in water, pure and mild ether.Formaldehyde all has strong harm, Long contact time can cause the tissue distortion to people's eyes, respiratory system, nervous system etc. and causes canceration, so it is a kind of potential dangerous carcinogenic substance and important environmental contaminants, and is seriously harmful to human body.
The GB detection method of formaldehyde mainly contains chemical method and instrumental method two big classes at present.Chemical method mainly contains phenol reagent process, acetylacetone method, variable color acid system, hydrochloric para-rosaniline method etc.Instrumental method mainly comprises vapor-phase chromatography, the chromatography of ions, oscillographic polarography determination method etc.These methods have advantage separately, all satisfy degree of certainty height, the requirement that measurement range is wide generally.But these methods all are to belong to offline inspection, analyze after just the laboratory being gone back in the gaseous sample collection; So carry out according to the method described above that sense cycle is long, cost is high, complex steps, can not directly carry out at scene to be detected, can't reflect room air formaldehyde pollution degree in real time and satisfy the monitoring needs of on-the-spot large quantities of measuring points.
The existing air formaldehyde box low price of testing oneself, simple to operate, but error is big, because naked eyes are judged differing greatly of color, therefore can not reflect actual content of formaldehyde fully really; Portable detector accuracy of detection height, but cost an arm and a leg, be not suitable for mass marketing.
The utility model content
For solving the problems of the technologies described above, the purpose of this utility model is to provide a kind of portable concentration of formaldehyde pick-up unit, the airborne concentration of formaldehyde of measurement that can be quick, accurate, portable.
For achieving the above object, the technical solution of the utility model is as follows: a kind of portable concentration of formaldehyde pick-up unit comprises:
Drawing fan is used to absorb air to be detected;
Transparent vessel is used to hold phenol reagent solution, and airborne formaldehyde and phenol reagent solution reaction generate piperazine, and oxidation reaction generates the blue-green compound in the presence of ferric ion, and solution colour changes;
Optical sensor, described optical sensor are two pieces, and one piece of reflected light that is used for solution colour after the detection reaction is converted into voltage signal, and one piece is played reference role;
LED is for described light sensors solution colour provides illumination;
Eyeglass, the reflected light of solution colour by described eyeglass optically focused after direct projection to detecting with in the optical sensor;
Catoptron reflects the optical sensor that described reference role given in described LED illumination, and the optical sensor of described reference role produces reference voltage signal;
Microprocessor is handled the voltage signal that described two pieces of optical sensors transmit, and compares the voltage signal that described two pieces of optical sensors transmit, and extrapolates the content of piperazine, converts and learns the content of air formaldehyde concentration;
Display is used to show the numerical value of concentration of formaldehyde, and described display shows the numerical value of 1-4 position.
Preferably, described device also comprises:
Gas outlet is used to discharge formaldehyde gas in addition.
Preferably, described drawing fan is set rotation time by microprocessor, the control suction air volume.
Preferably, described display is 7 n segment display ns or liquid crystal display display.
Preferably, described device also comprises:
Power-supply device, described power-supply device are dry cell or built-in lithium battery external charge device, are used to described device that power supply is provided.
Adopt the beneficial effect of above technical scheme to be: owing to set the rotation time of drawing fan by microprocessor, can strictly control the inhaled air volume, and compare the voltage signal that optical sensor transmits by microprocessor, extrapolate concentration of formaldehyde, thereby can extrapolate the concentration of formaldehyde in this volumes of air accurately, and show concentration of formaldehyde numerical value by display; Because formaldehyde and phenol reagent reaction produce change color, the depth of color is directly proportional with content of formaldehyde, is swift in response, and can measure concentration of formaldehyde fast; Owing to be provided with power-supply device, can both measure airborne concentration of formaldehyde in any place behind the starter gear switch, will the gaseous sample collection not take back lab analysis, more portable like this.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the utility model embodiment technology, to do to introduce simply to the accompanying drawing of required use in the embodiment technical description below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of portable concentration of formaldehyde pick-up unit of the utility model.
Fig. 2 is the vertical view of a kind of portable concentration of formaldehyde pick-up unit of the utility model.
Fig. 3 is the structured flowchart of a kind of portable concentration of formaldehyde pick-up unit of the utility model.
Fig. 4 is that the light intensity of a kind of portable concentration of formaldehyde pick-up unit of the utility model is measured structural representation.
The represented corresponding component title of numeral among the figure:
1, gas outlet 2, transparent vessel 3, drawing fan 4, electric loop portion 5, reference optical sensor 6, catoptron 7, specimen 8, eyeglass 9, test optical sensor 10, LED.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figures 1 to 4, the portable concentration of formaldehyde pick-up unit in the present embodiment comprises: drawing fan 3 is used to absorb air to be detected; Transparent vessel 2, be used to hold phenol reagent solution, this solution is by phenol reagent, ammonium ferric sulfate and water proportioning by a certain percentage, and airborne formaldehyde and phenol reagent solution reaction generate piperazine, oxidation reaction generates the blue-green compound in the presence of ferric ion, and solution colour changes; Eyeglass 8, the reflected light of solution colour is used in the optical sensor to detecting by direct projection behind eyeglass 8 optically focused; LED10 is for two pieces of light sensors solution colours provide illumination; Two pieces of optical sensors, be respectively with reference to using optical sensor 9 with testing with optical sensor 5, test is used to measure the color of current solution with optical sensor 9, with reference to using 5 reference roles of optical sensor, the reflected light of solution colour produced current signal after test used optical sensor 9 by eyeglass 8 detection chemical reactions, was converted into voltage signal again by amplifier, produce current signal with reference to receiving LED10 illumination by catoptron 6, be converted into reference voltage signal again by amplifier with optical sensor 5; Gas outlet 1 is used to discharge formaldehyde gas in addition; Electric loop portion 4, be provided with microprocessor in the electric loop portion 4, display and power-supply device, described power-supply device is a dry cell, dry cell provides power supply for the concentration of formaldehyde pick-up unit, display is 7 n segment display ns, the numerical value that can show the 1-4 position, the rotation time of microprocessor control drawing fan 3, the control suction air volume, drawing fan 3 absorbs the air to be detected of certain volume, microprocessor also provides the enabling signal of LED10, handle the voltage signal that two pieces of optical sensors transmit, contrastive test is extrapolated the content of piperazine with optical sensor 9 with reference to the voltage signal with optical sensor 5, convert again and learn the content of air formaldehyde concentration, and this numerical value is shown by 7 n segment display ns.
Introduce the concrete principle of work of this device below:
Start keyswitch, the concentration of formaldehyde pick-up unit is started working, set the rotation time of drawing fan 3 by microprocessor, the control suction air volume, drawing fan 3 absorbs the air to be detected of certain volume, phenol reagent solution reaction in formaldehyde in the specimen 7 and the transparent vessel 2 generates piperazine, oxidation reaction generates the blue-green compound in the presence of ferric ion, solution colour changes, LED10 provides ruddiness illumination, wavelength coverage is at 600-640nm, irradiation solution, the reflected light of solution colour is used in the optical sensor 9 to test by direct projection behind eyeglass 8 optically focused, produce current signal, current signal is converted into voltage signal by amplifier, with reference to receiving LED10 illumination by catoptron 6 with optical sensor 5, produce current signal, current signal is converted into reference voltage signal by amplifier, the voltage signal that two pieces of optical sensors of microprocessor processes transmit, contrastive test is extrapolated the content of piperazine with optical sensor 9 with reference to the voltage signal with optical sensor 5, convert again and learn the content of air formaldehyde concentration, and this numerical value shown by 7 n segment display ns, show 0.808 as numerical value, represent that the content of formaldehyde in this volumes of air is 0.808mg/m
3, test finishes, and gas outlet 1 is discharged the gas beyond the formaldehyde in the air.
All the other are identical with embodiment 1, and difference is that described power-supply device also can be the mode of built-in lithium battery external charge device, power supply are provided for the concentration of formaldehyde pick-up unit.
All the other are identical with embodiment 1, and difference is that described display is the liquid crystal display display.
Owing to set the rotation time of drawing fan by microprocessor, can strictly control the inhaled air volume, and compare the voltage signal that optical sensor transmits by microprocessor, extrapolate concentration of formaldehyde, thereby can extrapolate the concentration of formaldehyde in this volumes of air accurately, and show concentration of formaldehyde numerical value by display; Because formaldehyde and phenol reagent reaction produce change color, the depth of color is directly proportional with content of formaldehyde, is swift in response, and can measure concentration of formaldehyde fast; Owing to be provided with power-supply device, can both measure airborne concentration of formaldehyde in any place behind the starter gear switch, will the gaseous sample collection not take back lab analysis, more portable like this.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the utility model.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined herein General Principle can realize under the situation that does not break away from spirit or scope of the present utility model in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (5)
1. a portable concentration of formaldehyde pick-up unit is characterized in that, comprising:
Drawing fan is used to absorb air to be detected;
Transparent vessel is used to hold phenol reagent solution, and airborne formaldehyde and phenol reagent solution reaction generate piperazine, and oxidation reaction generates the blue-green compound in the presence of ferric ion, and solution colour changes;
Optical sensor, described optical sensor are two pieces, and one piece of reflected light that is used for solution colour after the detection reaction is converted into voltage signal, and one piece is played reference role;
LED is for described light sensors solution colour provides illumination;
Eyeglass, the reflected light of solution colour by described eyeglass optically focused after direct projection to detecting with in the optical sensor;
Catoptron reflects the optical sensor that described reference role given in described LED illumination, and the optical sensor of described reference role produces reference voltage signal;
Microprocessor is handled the voltage signal that described two pieces of optical sensors transmit, and compares the voltage signal that described two pieces of optical sensors transmit, and extrapolates the content of piperazine, converts and learns the content of air formaldehyde concentration;
Display is used to show the numerical value of concentration of formaldehyde, and described display shows the numerical value of 1-4 position.
2. portable concentration of formaldehyde pick-up unit according to claim 1 is characterized in that, also comprises gas outlet, is used to discharge formaldehyde gas in addition.
3. portable concentration of formaldehyde pick-up unit according to claim 1 is characterized in that described drawing fan is set rotation time by microprocessor, the control suction air volume.
4. portable concentration of formaldehyde pick-up unit according to claim 1 is characterized in that, described display is 7 n segment display ns or liquid crystal display display.
5. according to the arbitrary described portable concentration of formaldehyde pick-up unit of claim 1-4, it is characterized in that described device also comprises:
Power-supply device, described power-supply device are dry cell or built-in lithium battery external charge device, are used to described device that power supply is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320080469 CN203101273U (en) | 2013-02-21 | 2013-02-21 | Portable formaldehyde concentration detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320080469 CN203101273U (en) | 2013-02-21 | 2013-02-21 | Portable formaldehyde concentration detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203101273U true CN203101273U (en) | 2013-07-31 |
Family
ID=48852664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320080469 Expired - Fee Related CN203101273U (en) | 2013-02-21 | 2013-02-21 | Portable formaldehyde concentration detecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203101273U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149202A (en) * | 2013-02-21 | 2013-06-12 | 苏州智能泰克有限公司 | Portable formaldehyde concentration detection apparatus and method |
| CN107525801A (en) * | 2017-07-17 | 2017-12-29 | 贵州金洋检测工程有限公司 | A kind of formaldehyde in air content assaying method |
| CN107833515A (en) * | 2017-12-04 | 2018-03-23 | 上海申得欧有限公司 | A kind of device for being used to detect catalysis material degraded pernicious gas effect |
| CN108072646A (en) * | 2016-11-08 | 2018-05-25 | 中国科学院大连化学物理研究所 | The pen-type detector and its detection method of toxic and harmful gas detection |
-
2013
- 2013-02-21 CN CN 201320080469 patent/CN203101273U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149202A (en) * | 2013-02-21 | 2013-06-12 | 苏州智能泰克有限公司 | Portable formaldehyde concentration detection apparatus and method |
| CN108072646A (en) * | 2016-11-08 | 2018-05-25 | 中国科学院大连化学物理研究所 | The pen-type detector and its detection method of toxic and harmful gas detection |
| CN107525801A (en) * | 2017-07-17 | 2017-12-29 | 贵州金洋检测工程有限公司 | A kind of formaldehyde in air content assaying method |
| CN107833515A (en) * | 2017-12-04 | 2018-03-23 | 上海申得欧有限公司 | A kind of device for being used to detect catalysis material degraded pernicious gas effect |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203101273U (en) | Portable formaldehyde concentration detecting device | |
| CN203949857U (en) | Hand-held colloidal gold strip card reader | |
| CN202735325U (en) | Handheld suction type volatile gas detector | |
| CN105510266A (en) | Harmful gas monitoring system based on infrared absorption spectrum | |
| CN203561586U (en) | Ammonia nitrogen-total phosphorus integrated rapid detector | |
| CN103512988A (en) | Portable natural gas and methane gas optical detection device and identification method for natural gas and methane gas | |
| CN204462027U (en) | A kind of water environment field quick detection instrument based on color sensing | |
| CN201368847Y (en) | Test paper reflective detector | |
| CN103376252A (en) | Portable gas detector based on multi-detector-tube color information identification | |
| CN202404061U (en) | Anti-interference analyzer for detecting trace formaldehyde in air | |
| CN204028089U (en) | Environment foul gas detector | |
| CN103149202A (en) | Portable formaldehyde concentration detection apparatus and method | |
| CN201517956U (en) | Infrared double wave SF6 gas quantifying leak detector | |
| CN102175627A (en) | Multi-wavelength multi-light-source diffuse reflection type colorimetric device and reflectivity measuring method | |
| CN208888104U (en) | A kind of portable automobile tail-gas analyzer | |
| CN102735683A (en) | Reading instrument of pH test paper | |
| CN204228602U (en) | Crop leaf physiological moisture monitoring system | |
| CN210571936U (en) | SO2On-line content analysis and detection device | |
| CN202562849U (en) | Air pollution detector | |
| CN202204751U (en) | Detector for fast measuring liquid specific gravity, turbidity and color | |
| CN202033293U (en) | Chloramphenicol concentration quantitative detection device based on test strip | |
| CN209280566U (en) | A kind of dry air formaldehyde in-situs tester | |
| CN201681070U (en) | New-generation rapid food physical and chemical detection case | |
| CN103398946B (en) | A kind of color of liquid with reference transmission method pick-up unit | |
| CN105486617A (en) | Fine particle fast detector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130731 Termination date: 20140221 |