CN216525445U - Smoke intensity detection device - Google Patents
Smoke intensity detection device Download PDFInfo
- Publication number
- CN216525445U CN216525445U CN202122978734.5U CN202122978734U CN216525445U CN 216525445 U CN216525445 U CN 216525445U CN 202122978734 U CN202122978734 U CN 202122978734U CN 216525445 U CN216525445 U CN 216525445U
- Authority
- CN
- China
- Prior art keywords
- laser
- measuring chamber
- gas
- light
- detection device
- 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.)
- Active
Links
Images
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model relates to a smoke intensity detection device, and belongs to the field of gas opacity detection and analysis. A smoke intensity detection device comprises a measuring chamber, wherein the measuring chamber is provided with a measuring channel for gas circulation and laser reciprocation, the measuring channel is provided with a light inlet and a light reflecting port which are used for gas outlet at the same time, the side wall of the measuring chamber is provided with a gas inlet communicated with the measuring channel, and one end of the measuring chamber, which is provided with the light inlet, is provided with a laser emitting element and a laser receiving element; the end of the measuring chamber, which is provided with the reflected light port, is provided with a reflecting element for reflecting the laser emitted by the laser emitting element back to the laser receiving element; the laser emitting element and the laser receiving element are electrically connected with each other through a control board. The utility model utilizes the principle of transmitting, receiving and reflecting laser, shortens the length of a measuring chamber and a measuring channel on the premise of meeting the national standard, reduces the volume of the device, and is beneficial to the integration and the portability of the device.
Description
Technical Field
The utility model relates to the field of gas opacity detection and analysis, in particular to a smoke intensity detection device.
Background
The pollution of mobile sources such as motor vehicles and the like becomes an important source of air pollution in China, serious pollution is brought to the atmospheric environment where human beings live, effective monitoring measures must be taken to monitor the opacity of tail gas of motor vehicles and non-road mobile machinery and various pollutant gases, and a direct basis is provided for environment law enforcement and decision making.
The present market mainly uses light-tight smoke meter product to detect the light-tight luminosity detection of diesel vehicle, and this kind of equipment is mainly applicable to the test station, is not suitable for the light-tight luminosity of convenient real-time measurement motor vehicle exhaust, to the road examine with the non-road remove mechanical detection, use the light-tight smoke meter product of tradition ground comparatively to influence detection efficiency.
Therefore, in the production of an apparatus for diesel vehicle exhaust opacity measurement, which is intended to simplify the constitution of the apparatus, for example, in the patent publication No. CN101949788A found by search, an air channel system for diesel vehicle exhaust smoke intensity measurement is disclosed, which injects laser light into a measurement light channel through a photo cell and a collimator lens, receives the laser light through a receiving lens and the photo cell, and determines the opacity of the exhaust gas based on the light absorption coefficient K value and the light absorption ratio N. The device has a simple structure, the volume of the light-tight detection equipment is reduced, but according to the requirements of JJG 976-.
SUMMERY OF THE UTILITY MODEL
1. Problems to be solved
Aiming at the problems of long length and large volume of a measuring channel in the prior art, the utility model provides the smoke intensity detection device, which improves the emission and the reception of laser, shortens the length of the measuring channel, reduces the volume of the device, and is convenient for device integration and carrying.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
A smoke intensity detection device comprises a measuring chamber, wherein the measuring chamber is provided with a measuring channel for gas circulation and laser reciprocation, the measuring channel is provided with a light inlet and a light reflecting port which are used for gas outlet at the same time, the side wall of the measuring chamber is provided with a gas inlet communicated with the measuring channel, and one end of the measuring chamber, which is provided with the light inlet, is provided with a laser emitting element and a laser receiving element; the measuring chamber is provided with a reflecting element at one end provided with a reflected light port and used for reflecting the laser emitted by the laser emitting element to the laser receiving element; the laser device also comprises a control board electrically connected with the laser emitting element and the laser receiving element.
Preferably, one end of the measuring chamber, which is provided with the light inlet, is provided with a photoelectric conversion plate which is electrically connected with the laser emitting element, the laser receiving element and the control plate.
Preferably, the reflecting element is a corner cube prism.
Preferably, one end of the measuring chamber, which is provided with the light inlet, is provided with a collimating lens for refracting the emitted laser light of the laser emitting element into parallel light.
Preferably, one end of the measuring chamber, which is provided with the light inlet, is provided with a first fan for forming a first air curtain; a second fan is arranged at one end of the measuring chamber, which is provided with a light reflecting port, and is used for forming a second air curtain; the first fan and the second fan are both electrically connected with the control panel.
Preferably, the measuring chamber is provided with a temperature sensor and a heater, both of which are electrically connected with the control board.
3. Advantageous effects
Compared with the prior art, the utility model has the beneficial effects that:
(1) the utility model utilizes the principle of transmitting, receiving and reflecting laser, shortens the length of a measuring chamber and a measuring channel on the premise of meeting the national standard, reduces the volume of the device, and is beneficial to the integration and the portability of the device.
(2) The fans at the two ends of the measuring chamber form two air curtains, so that dust can be prevented from being stained on the mirror surface, the detection precision is improved, and the gas can be promoted to be discharged; the temperature sensor arranged in the measuring chamber can be matched with the heater to keep the temperature in the measuring chamber within a proper range, and the water vapor in the exhaust gas is prevented from being condensed into fog to influence the measuring result.
Drawings
FIG. 1 is a connection diagram of the internal structure of a gas concentration detection unit according to the present invention;
FIG. 2 is a diagram illustrating the connection relationship between the interior of the conventional smoke detection unit;
FIG. 3 is a block diagram of the internal connection structure of the data processor of the present invention;
FIG. 4 is a block diagram of the internal connections of the power supply of the present invention;
FIG. 5 is a diagram of the circuit connection according to the present invention;
fig. 6 is a structural diagram of the smoke density detection unit of the present invention.
In the figure:
1. a sample gas input pipeline;
2. a filtering mechanism;
21. a pre-condensing filter; 22. a water filter;
3. a smoke intensity detection unit;
31. a measurement chamber; 311. a measurement channel; 312. a light inlet; 313. a reflected light port; 314. an air inlet;
32. a pyramid prism; 33. a photoelectric conversion panel; 34. a first fan; 35. a second fan;
36. a laser emitting element; 37. a laser receiving element; 38. a collimating lens;
4. a gas concentration detection unit;
41. an electromagnetic directional valve; 42. a standard gas inlet; 43. a gas concentration detection mechanism;
431. an infrared optical sensor; 432. o is2An electrochemical sensor; 433. a NO electrochemical sensor;
5. a control panel;
6. a printer;
7. a touch screen;
8. a smoke detection air inlet; 9. a gas concentration detection inlet.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the effects of the utility model easy to understand, the utility model is further described with the embodiment.
As shown in fig. 5, a portable integrated motor vehicle exhaust analyzer is mainly composed of an air intake system, a smoke intensity detection unit 3 and a gas concentration detection unit 4, wherein the unit systems are controlled by a control board 5 and are powered by the same power supply system, and the power supply system also supplies power to the control board 5. The smoke intensity detection unit 3 is mainly used for detecting the smoke intensity of the tail gas sampling gas. The gas concentration detection unit 4 mainly detects HC (hydrocarbon), CO (carbon monoxide), and CO in the exhaust gas sample gas2(carbon dioxide), O2(oxygen) and NO (nitric oxide).
The air inlet system mainly comprises a sample gas input pipeline 1 and a filtering mechanism arranged on the sample gas input pipeline 1. The filtering mechanism 2 comprises a preposed condensing filter 21 arranged at the initial end of the sample gas input pipeline 1 and is used for filtering dust in tail gas, cooling flue gas and preventing gas entering the analysis optical platform from generating condensed water; the preposed condensing filter 21 is communicated with a water filter 22, and the water filter 22 separates oil and water in the sample gas to be measured and filters out dust; the water filter 22 and the condensing filter 21 are both communicated with the air pump, thereby discharging the moisture. Wherein the gas concentration detection inlet 9 is arranged at the gas outlet of the water filter 22, and the smoke intensity detection inlet 8 is arranged at the gas outlet on one side of the preposed condensing filter 21. With this realization through appearance gas input pipeline 1 suction tail gas, again with leading-in smoke intensity detecting element 3 and gas concentration detecting element 4 simultaneously of tail gas to the smoke intensity and the component gas concentration of simultaneous detection tail gas have promoted detection efficiency greatly.
As shown in fig. 1 and 5, the gas concentration detecting unit 4 is mainly used for detecting five-component gas, and includes an electromagnetic directional valve 41 communicated with the gas concentration detecting gas inlet 9 for switching between zero gas and sampling gas, wherein the electromagnetic directional valve 41 can beIs a three-way electromagnetic valve. One end of the electromagnetic directional valve 41 is provided with a standard gas inlet 42 for adjusting the zero value of the gas concentration detection mechanism 43, and a zero gas filter is arranged behind the standard gas inlet 42 and used for removing dust in air; the other end of the electromagnetic directional valve 41 is communicated with a gas concentration detection mechanism 43, the gas concentration detection mechanism 43 comprises an infrared optical sensor 431 communicated with one end of the electromagnetic directional valve 41, and the infrared optical sensor 431 is sequentially connected with O2Electrochemical sensor 432 and NO electrochemical sensor 433; besides, a second air pump is arranged behind the electromagnetic directional valve 41, and a calibration air interface is arranged. Wherein the infrared optical sensor 431 is used for measuring CO and CO in real time2And HC concentration, NO electrochemical sensor 433 for measuring NO concentration, O2Electrochemical sensor 432 for measuring O2Wherein, the infrared optical sensor 431 adopts the principle of non-spectroscopic infrared absorption method, after the infrared radiation emitted by the infrared light source is absorbed by the gas to be measured with a certain concentration, the spectrum intensity in direct proportion to the gas concentration will change, therefore, the concentration of the gas to be measured can be inverted by obtaining the variation of the spectrum light intensity. The air inlet end of the infrared optical sensor 431 is also connected with a calibration air interface. The control panel 5 controls the air pump 24 to be switched with standard air (standard air) through the electromagnetic directional valve 41.
The smoke detection measures the smoke value of the tail gas by utilizing the principle that the tail gas absorbs light mainly according to the Lambert-beer law, and comprises the following steps: the light absorption coefficient K value and the light absorption ratio N value. The optical channel length is specified by JJG 976-. As shown in fig. 2, a conventional smoke intensity detecting device is generally provided with a laser transmitter at one end of a detecting channel and a laser receiver at the other end of the detecting channel, so that the length of the detecting channel is limited, and the standard length of 0.430m is still inconvenient for the whole device to carry about, and therefore, the utility model is further improved as follows:
as shown in fig. 5 and 6, the main body of the smoke density detection unit 3 is a measurement chamber 31 communicating with the smoke density detection intake port 8, and the pre-condensation filter 21 is separated from the other exhaust port on the basis of the above-described device, and led to the measurement chamber 31 having a cavity structure. The measurement chamber 31 is provided with a measurement channel 311 for gas circulation and laser reciprocation, the measurement channel 311 is provided with a light inlet 312 and a reflected light inlet 313, the side wall of the measurement chamber 31 is provided with a gas inlet 314 communicated with the measurement channel, one end of the measurement chamber 31 provided with the light inlet 312 is provided with a photoelectric conversion plate 33, the photoelectric conversion plate 33 is a smoke intensity plate in the prior art, and accessories contained in the device refer to the description of the prior art and are not repeated herein; the photoelectric conversion plate 33 is provided with a laser emitting element 36 and a laser receiving element 37, and the photoelectric conversion plate 33 is used for transmitting or converting electric signals for the laser emitting element 36 and the laser receiving element 37; a collimator lens 38 is provided between the photoelectric conversion plate 33 and the end of the measurement chamber 31 to refract the laser light emitted from the laser emitting element 36 into a parallel beam passing through the measurement channel 311; one end of the measuring chamber 31, which is provided with the reflected light port 313, is provided with a reflecting element for reflecting the laser light emitted by the laser emitting element 36 back to the laser receiving element 37, and the reflecting element can be a pyramid prism 32, and can be a prism specifically; the laser emitting element 36 and the laser receiving element 37 are electrically connected to the control board 5.
The scheme is further improved, a first fan 34 is arranged between the corner cube 32 and the measuring chamber 31, and therefore a first air curtain is formed by the air curtain formed by air blowing of the first fan; a second fan 35 is provided between the photoelectric conversion panel 33 and the measurement chamber 31, thereby forming a second air curtain; the first fan 34 and the second fan 35 are both in control connection with the control board 5. The formation of the air curtain avoids the nearby lens from being contaminated by soot particles and influencing the measurement result. The photoelectric conversion plate 33 is connected with a smoke intensity sampling circuit in the control plate 5. The measuring chamber 31 is provided with a temperature sensor, mainly a measuring chamber wall temperature sensor which is arranged on the side wall and connected with the control panel 33 and used for monitoring the temperature of the measuring chamber, and a flue gas temperature sensor which is arranged in the measuring chamber 31 and connected with the control panel 33 and used for measuring the temperature of the flue gas; the measuring chamber 31 is also provided with a heater electrically connected with the control board 33, and the heater is used for heating the measuring chamber 31 to keep the temperature of the measuring chamber above 70 ℃, so that the water vapor in the tail gas is prevented from being condensed into fog to influence the measuring result.
The technical scheme utilizes the reflection principle of laser, shortens the lengths of the measuring chamber and the measuring channel on the premise of meeting the national standard, reduces the volume of the device, and is beneficial to the integration and carrying of the device.
As shown in fig. 3 and 5, the control board 5 includes a data processing board, and a solenoid valve assembly connected to the data processing board. The solenoid valve set is used for controlling the start and stop of the air pump 24. And the data processing board is also connected with a touch screen 7 for controlling the data processing board by personnel. The data processing board is also connected to a printer 6 for printing the analysis report generated by the data processor. And the data processing board is also connected with a 4G or 5G communication module for dynamically transmitting the analysis to the remote corollary equipment. The data processing board is also connected with a rotating speed sensor which is used for being installed on the tested automobile and monitoring the running speed of the automobile engine in real time. The data processing board is also connected with an oil temperature sampling circuit, and an oil temperature sensor connected with the data processing board is used for monitoring the real-time oil temperature of the automobile. The data processing board is also connected with an environment temperature and humidity sampling circuit, and the temperature sensor and the humidity sensor which are connected with the data processing board are used for monitoring the environment temperature.
As shown in fig. 4, the power supply system includes an AC/DC charger, which is connected to a 12V lithium battery, and the 12V lithium battery is connected to a voltage sampling and power supply circuit serial port on the data processing board to implement power supply control.
The working principle of the utility model is as follows: in the smoke intensity detection unit 3, a sampling probe is connected to the measurement chamber 31 through a sampling tube, receives the exhaust gas discharged from the pre-condensation filter 21, and then introduces the exhaust gas into the measurement chamber 31. The photoelectric conversion board 33 emits a light source to pass through the measuring chamber 31, the light source is refracted by the corner cube prism 32 and then reflected to a photoelectric receiving circuit board of the photoelectric conversion board 33 in parallel, the receiving result is converted into an analog data signal to be transmitted to the smoke intensity sampling circuit for processing, the processing result is printed by a printer 6 controlled by a data processor, and meanwhile, the touch screen 7 displays the processing result.
In the gas concentration detection unit 4, the tail gas sampling gas passes through the preposed condensing filter 21, the preposed condensing filter 21 filters dust in the tail gas, and the flue gas is cooled to prevent the gas entering the analysis optical platform from generating condensed water. Then, the water filter 22 separates oil and water in the sample gas to be measured, and filters off dust. The air pump 24 is used for condensing the front partThe water in the filter 21 and the water filter 22 is discharged. The air filter 23 is used to filter dust in the air. The electromagnetic directional valve 41 is used for switching between zero gas and sampling gas. Infrared optical sensor 431 measures CO and CO in real time2And HC concentration, NO electrochemical sensor 433 measures the concentration of NO, O2Electrochemical sensor 432 measures O2The concentration of (c). The final detection result is printed by a printer 6 controlled by the data processor and displayed by a touch screen 7.
In this patent, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.
The foregoing shows and describes the general principles, principal features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the utility model, but that various changes and modifications may be made without departing from the spirit and scope of the utility model, which shall fall within the scope of the claimed invention. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (6)
1. A smoke intensity detection device comprises a measurement chamber (31), wherein the measurement chamber (31) is provided with a measurement channel (311) for gas circulation and laser reciprocation, the measurement channel (311) is provided with a light inlet (312) and a reflected light port (313) which are used for gas outlet at the same time, and the side wall of the measurement chamber (31) is provided with a gas inlet (314) communicated with the measurement channel (311), and the smoke intensity detection device is characterized in that one end of the measurement chamber (31) provided with the light inlet (312) is provided with a laser emitting element (36) and a laser receiving element (37); one end of the measuring chamber (31) provided with a reflected light port (313) is provided with a reflecting element for reflecting the laser emitted by the laser emitting element (36) back to the laser receiving element (37); and a control board (5) electrically connected with the laser emitting element (36) and the laser receiving element (37).
2. A smoke detection device according to claim 1, wherein the end of the measuring chamber (31) where the light inlet (312) is arranged is provided with a photoelectric conversion plate (33) electrically connected with the laser emitting element (36), the laser receiving element (37) and the control plate (5).
3. A smoke detection device according to claim 1, wherein said reflecting element is a corner cube prism (32).
4. A smoke intensity detecting apparatus according to claim 1, wherein an end of said measuring chamber (31) provided with said light inlet (312) is provided with a collimating lens (38) for refracting the emitted laser light of said laser emitting element (36) into parallel light.
5. A smoke detection device according to claim 1, wherein the end of said measuring chamber (31) provided with said light inlet (312) is provided with a first fan (34) for forming a first air curtain; one end of the measuring chamber (31) provided with the light reflecting port (313) is provided with a second fan (35) for forming a second air curtain; the first fan (34) and the second fan (35) are both electrically connected with the control board (5).
6. A smoke detection device according to claim 1, wherein said measuring chamber (31) is provided with a temperature sensor and a heater, both of which are electrically connected to the control board (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122978734.5U CN216525445U (en) | 2021-11-26 | 2021-11-26 | Smoke intensity detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122978734.5U CN216525445U (en) | 2021-11-26 | 2021-11-26 | Smoke intensity detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216525445U true CN216525445U (en) | 2022-05-13 |
Family
ID=81466024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122978734.5U Active CN216525445U (en) | 2021-11-26 | 2021-11-26 | Smoke intensity detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216525445U (en) |
-
2021
- 2021-11-26 CN CN202122978734.5U patent/CN216525445U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106383097B (en) | Remote sensing detection system and method for motor vehicle tail gas based on tunable laser | |
| EP1176412A2 (en) | Vehicle emission sampling and analysis assembly | |
| CN101936896B (en) | Alcohol gas concentration laser telemetering device | |
| CN101551326B (en) | Intelligent wireless vehicular embedded analytical equipment for automobile exhaust | |
| CN102253012B (en) | Device and method for measuring extinction coefficient of black carbon aerosol | |
| CN201269854Y (en) | Optical sensor for automobile exhaust | |
| WO2022267963A1 (en) | Comprehensive detection apparatus for composite gas | |
| CN209764825U (en) | Gaseous detection device and have this gaseous detection device's unmanned aerial vehicle | |
| CN102608010A (en) | Particulate matter (PM) detecting method and equipment | |
| CN216525445U (en) | Smoke intensity detection device | |
| CN204008445U (en) | A kind of infrared optics three component vehicle exhaust concentration sensors | |
| CN209247619U (en) | A kind of multi-beam laser multi-lane motor vehicle tail gas remote sensing detection system | |
| CN105300889B (en) | The method and device of trace gas concentration is measured as photoacoustic cell using diffusing reflection integral chamber | |
| CN216525444U (en) | Portable integrated motor vehicle tail gas analyzer | |
| WO2010135006A2 (en) | Sensitive gas-phase fluorimeter at ambient pressure for nitrogen dioxide | |
| CN106525737B (en) | The parallel trace detection fire disaster alarming device of more gases and method | |
| CN209821059U (en) | On-site smoke detection device based on spectrum technology | |
| CN112067521A (en) | Shooting type smoke intensity detection device for diesel machinery | |
| CN104502313B (en) | Novel optical platform of transmission type smoke meter | |
| CN110567912A (en) | Carbon monoxide concentration detection module, carbon monoxide concentration telemeter and application | |
| CN113804641A (en) | Laser-based atmospheric carbon emission detection method | |
| CN212301229U (en) | Shooting type smoke intensity detection device for diesel machinery | |
| CN215493144U (en) | Series-type detection device for diesel engine exhaust gas and exhaust particulate matter | |
| CN213580665U (en) | Air gas monitoring device based on cavity ring-down technology | |
| CN211235406U (en) | Motor vehicle exhaust emission monitoring system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |