CN213933492U - Single-cylinder double-laser-head dust concentration sensor - Google Patents
Single-cylinder double-laser-head dust concentration sensor Download PDFInfo
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- CN213933492U CN213933492U CN202023053480.8U CN202023053480U CN213933492U CN 213933492 U CN213933492 U CN 213933492U CN 202023053480 U CN202023053480 U CN 202023053480U CN 213933492 U CN213933492 U CN 213933492U
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- 238000012545 processing Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 25
- 206010070834 Sensitisation Diseases 0.000 abstract description 6
- 230000008313 sensitization Effects 0.000 abstract description 6
- 238000005286 illumination Methods 0.000 abstract description 4
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- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
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- 238000011161 development Methods 0.000 description 1
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Abstract
A single-cylinder double-laser-head dust concentration sensor relates to the technical field of dust concentration detection and solves the problem of limitation of a laser irradiation area in a detection area, and comprises a laser emission circuit board, a laser head I, a laser head II, a laser emission cavity, a mounting base, a laser receiving circuit board, a photosensitive chip, an optical filter and a laser receiving cavity, wherein the mounting base is of a trapezoidal structure, the laser emission cavity and the laser receiving cavity are respectively arranged on two side edges of the mounting base, the laser head I and the laser head II are arranged on the laser emission circuit board in parallel in a welding mode, and the laser receiving circuit board is connected with the laser receiving cavity through bolts; two laser heads of laser emission circuit board drive transmit parallel laser beam, can enlarge the dust detection area, increase laser illumination intensity, and then the sensitization chip in the laser receiver board can be more accurate the laser intensity of detection dust scattering, improve the precision that detects.
Description
Technical Field
The utility model relates to a dust concentration sensor especially relates to a two laser head dust concentration sensor of single cylinder.
Background
With the economic development and the improvement of life quality, the air quality is concerned in recent years, and particularly in industrial environments such as coal mines, building sites and the like, a dust concentration value in the air becomes a supervision index of the industrial sites. The dust concentration sensor is a device capable of rapidly detecting the value of dust in the air, and becomes a necessary sensing device for industrial places. Although the existing civil laser dust concentration sensors are more, the measuring range is smaller, so that the method is not suitable for industrial environment. The laser dust sensor designed for industrial environment mostly adopts a detection mode of one laser head and one laser receiver, and because the irradiation range of one laser head is limited and the angle is single, the dust detection area is smaller, and the dust concentration in the air cannot be accurately detected.
The Chinese patent application No. 201710221303.X discloses a dust sensor, which comprises a laser, a reflector and a sampling detection cavity, wherein the laser emits laser beams, the reflector reflects the laser beams to form reflected beams, the reflected beams enter the sampling detection cavity, and a photosensitive element in the sampling detection cavity detects the laser beams scattered by dust and is used for calculating the dust concentration in air. The invention adopts a laser and a photosensitive element detection mode, has limited detection range and small detectable dust concentration range, and is not suitable for industrial environment. The Chinese patent application No. 201710706719.0 discloses a double-laser-head dust detection method and a sensor, wherein two laser heads are adopted to alternately emit laser to the same detection area, the laser irradiates the dust particles in the detection area to be scattered, and a photoelectric receiver captures the scattered laser so as to calculate the dust concentration in the air. The method adopts a mode of alternately using two laser heads, can prolong the service life of the laser heads, but is also a one-to-one detection mode of the laser heads and the photoelectric receivers, and the detection area is limited by the laser irradiation area.
Disclosure of Invention
In order to solve the problem, the utility model provides a two laser head dust concentration sensor of single section of thick bamboo provides a detection area wider, detects the higher dust concentration sensor of precision. In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a two laser head dust concentration sensor of single section of thick bamboo, includes laser emission circuit board, laser head I, laser head II, laser emission chamber, mounting base, laser receiving circuit board, sensitization chip, light filter, laser receiving chamber, mounting base set up to trapezium structure, laser emission chamber, laser receiving chamber set up respectively on two sides of mounting base, the laser emission circuit board be connected with the laser emission chamber through the bolt, laser head I, laser head II through welded mode parallel arrangement on the laser emission circuit board, the laser receiving circuit board be connected with the laser receiving chamber through the bolt, the sensitization chip set up the middle part at the laser receiving circuit board through the welded mode, the light filter setting in the inside in laser receiving chamber.
Furthermore, the laser emitting circuit board is parallel to one side edge of the mounting base, the laser receiving circuit board is parallel to the other side edge of the mounting base, the included angle between the two side edges of the mounting base is set to be alpha, and the angle value of the alpha is set to be 90-120 degrees, namely the included angle between the laser emitting circuit board and the laser receiving circuit board is 90-120 degrees.
Furthermore, the distance between the laser head I and the laser head II is set to be 1mm-10mm, and the laser emitting circuit board drives the two laser heads to emit parallel laser beams, so that the detection area and the illumination intensity are enlarged.
Furthermore, the laser emission cavity and the laser receiving cavity are arranged to be cylindrical structures, and an included angle formed by the laser emission cavity and the laser receiving cavity is set to be 60-90 degrees.
Furthermore, the laser receiving circuit board comprises a microcontroller, an analog-to-digital conversion chip and a communication module, wherein the analog-to-digital conversion chip is electrically connected with the photosensitive chip through a signal processing circuit, the analog-to-digital conversion chip is electrically connected with the microcontroller, and the microcontroller is electrically connected with the communication module. The photosensitive chip detects the laser intensity scattered by the dust particles, then analog signals output by the photosensitive chip are converted into digital signals through the analog-to-digital conversion chip, the microcontroller calculates corresponding dust concentration values according to the read digital values, and finally the detected dust concentration values are output through the serial port communication module or the frequency signals.
Furthermore, the laser head I and the laser head II share one laser emitting cavity to emit laser beams, and the single-cylinder double-laser head does not need to additionally increase the volume of the laser dust sensor.
Further, the laser receiving cavity is provided with a groove, and the optical filter is arranged in the groove.
Compared with the prior art, the utility model discloses following beneficial effect has: the laser emission circuit board drives the two laser heads to emit parallel laser beams, so that a dust detection area can be enlarged, the laser illumination intensity is increased, the laser intensity of dust scattering can be more accurately detected by the photosensitive chip in the laser receiving board, and the detection accuracy is improved; in addition, the single-cylinder double-laser head design does not increase the volume of the sensor additionally, and the single-cylinder double-laser head is convenient to install in the dust detection device.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic top view of the mounting base;
FIG. 3 is a schematic circuit diagram of a laser emitting circuit board;
FIG. 4 is a schematic circuit diagram of a laser receiving circuit board;
in the drawings: 1. laser emission circuit board, 2, laser head I, 3, laser head II, 4, laser emission chamber, 5, mounting base, 6, laser receiving circuit board, 7, sensitization chip, 8, light filter, 9, laser receiving chamber, 10, dust detection zone.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described with reference to fig. 1, fig. 2, fig. 3, fig. 4 and specific embodiments.
As shown in figure 1, the single-cylinder double-laser-head dust concentration sensor comprises a laser emission circuit board 1, a laser head I2, a laser head II 3, a laser emission cavity 4, a mounting base 5, a laser receiving circuit board 6, a photosensitive chip 7, a light filter 8 and a laser receiving cavity 9, the installation base 5 is in a trapezoidal structure, the laser emission cavity 4 and the laser receiving cavity 9 are respectively arranged on two side edges of the installation base 5, the laser emitting circuit board 1 is connected with the laser emitting cavity 4 through a bolt, the laser head I2 and the laser head II 3 are arranged on the laser emitting circuit board 1 in parallel in a welding mode, the laser receiving circuit board 6 is connected with the laser receiving cavity 9 through a bolt, the photosensitive chip 7 is arranged in the middle of the laser receiving circuit board 6 in a welding mode, and the optical filter 8 is arranged inside the laser receiving cavity 9.
Further, the laser emitting circuit board 1 is parallel to one side edge of the mounting base 5, the laser receiving circuit board 6 is parallel to the other side edge of the mounting base 5, an included angle between the two side edges of the mounting base 5 is set to be alpha, and the value of the angle of the alpha is set to be 90-120 degrees, namely the included angle between the laser emitting circuit board 1 and the laser receiving circuit board 6 is 90-120 degrees.
Furthermore, the distance between the laser head I2 and the laser head II 3 is set to be 1mm-10mm, and the laser emitting circuit board 1 drives the two laser heads to emit parallel laser beams, so that the detection area and the illumination intensity are enlarged.
Furthermore, the laser emission cavity 4 and the laser receiving cavity 9 are arranged in a cylindrical structure, and the included angle formed by the laser emission cavity 4 and the laser receiving cavity 9 is set to be 60-90 degrees.
Furthermore, the laser head I2 and the laser head II 3 share the laser emission cavity 4 to emit laser beams, and the single-cylinder double-laser head does not need to additionally increase the volume of the laser dust sensor.
Further, the laser receiving cavity 9 is provided with a groove in which the optical filter 8 is disposed.
As shown in fig. 2, the mounting base 5 is provided with a positioning hole for fixing the laser emitting circuit board 1 and the laser receiving circuit board 6, and a laser emitting cavity and a laser receiving cavity mounting hole of a cylindrical structure are respectively arranged below the circuit boards.
As shown in fig. 3, the laser emitter board circuit board includes a power module, a voltage regulator circuit and two pulse generating circuits. The power supply module is used for converting voltage and converting power supply voltage into voltage adapted to the laser transmitting circuit; the voltage stabilizing circuit outputs stable direct-current voltage through the voltage stabilizing chip, and if the voltage is unstable, the intensity of laser emitted by the laser head is influenced, so that the dust detection accuracy is influenced; the pulse generating circuit builds an oscillating circuit through a timer to generate rectangular waves and drive the laser head to emit laser, and the pulse generating circuit is divided into two paths to respectively drive the laser head I2 and the laser head II 3.
As shown in fig. 4, the laser receiving circuit board 6 includes a microcontroller, an analog-to-digital conversion chip and a communication module, the analog-to-digital conversion chip is electrically connected to the photosensitive chip through a signal processing circuit, the analog-to-digital conversion chip is electrically connected to the microcontroller, and the microcontroller is electrically connected to the communication module. The photosensitive chip detects the laser intensity scattered by the dust particles, then analog signals output by the photosensitive chip are converted into digital signals through the analog-to-digital conversion chip, the microcontroller calculates corresponding dust concentration values according to the read digital values, and finally the detected dust concentration values are output through the serial port communication module or the frequency signals.
The utility model discloses a working process and theory of operation: laser emission circuit board 1 drive laser head I2, laser head II 3 transmission pulsed laser, and pulsed laser sees through laser emission chamber 4 and shines and take place the scattering in the dust granule of dust detection zone 10, and the laser of scattering gets into laser receiving chamber 9 and shines sensitization chip 7 through light filter 8, and sensitization chip 7 detects the laser intensity of scattering, and then calculates the dust concentration in the air.
The dust concentration calculation formula is determined by a dust calibration device, the dust concentration value in the air is determined by the dust calibration device, then a corresponding digital value is obtained by a dust concentration sensor, and finally the dust concentration calculation formula is calculated according to the dust concentration value and the digital value acquired by the microcontroller.
The laser head is a laser with the wavelength of 650nm, the optical filter 8 is a band-pass filter of BP650nm, the allowed wavelength bandwidth is 620nm-680nm, the photosensitive chip 7 can detect the spectrum signal with the wavelength of 400nm-1100nm, the BP650nm band-pass filter 8 allows the laser beam with the wavelength of 650nm to penetrate through, the beams with other wavelengths are filtered, and the interference of outdoor light is reduced.
Utilize technical scheme, or technical personnel in the field are in the utility model discloses under technical scheme's the inspiration, design similar technical scheme, and reach above-mentioned technological effect, all fall into the utility model discloses a protection scope.
Claims (7)
1. A single-cylinder double-laser-head dust concentration sensor comprises a laser emission circuit board (1), a laser head I (2), a laser head II (3), a laser emission cavity (4), a mounting base (5), a laser receiving circuit board (6), a photosensitive chip (7), a light filter (8) and a laser receiving cavity (9), and is characterized in that the mounting base (5) is of a trapezoidal structure, the laser emission cavity (4) and the laser receiving cavity (9) are respectively arranged on two sides of the mounting base (5), the laser emission circuit board (1) is connected with the laser emission cavity (4) through bolts, the laser head I (2) and the laser head II (3) are arranged on the laser emission circuit board (1) in parallel in a welding mode, and the laser receiving circuit board (6) is connected with the laser receiving cavity (9) through bolts, the photosensitive chip (7) is arranged in the middle of the laser receiving circuit board (6) in a welding mode, and the optical filter (8) is arranged inside the laser receiving cavity (9).
2. The single-cylinder double-laser-head dust concentration sensor according to claim 1, characterized in that the laser emitting circuit board (1) is parallel to one side of the mounting base (5), the laser receiving circuit board (6) is parallel to the other side of the mounting base (5), the angle between the two sides of the mounting base (5) is set to be α, and the value of the angle α is set to be 90 ° to 120 °.
3. The single-cylinder double-laser-head dust concentration sensor according to claim 1, wherein the distance between the laser head I (2) and the laser head II (3) is set to be 1mm to 10 mm.
4. The single-cylinder double-laser-head dust concentration sensor of claim 1, wherein the laser emission cavity (4) and the laser receiving cavity (9) are arranged in a cylindrical structure, and an included angle formed by the laser emission cavity (4) and the laser receiving cavity (9) is set to be 60-90 degrees.
5. The single-cylinder double-laser-head dust concentration sensor according to claim 1, wherein the laser head I (2) and the laser head II (3) share one laser emission cavity (4) to emit laser beams.
6. The single-cylinder double-laser-head dust concentration sensor according to claim 1, wherein the laser receiving chamber (9) is provided with a groove, and the optical filter (8) is disposed in the groove.
7. The single-cylinder double-laser-head dust concentration sensor according to claim 1, wherein the laser receiving circuit board (6) comprises a microcontroller, an analog-to-digital conversion chip and a communication module, the analog-to-digital conversion chip is electrically connected with the photosensitive chip (7) through a signal processing circuit, the analog-to-digital conversion chip is electrically connected with the microcontroller, and the microcontroller is electrically connected with the communication module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023053480.8U CN213933492U (en) | 2020-12-17 | 2020-12-17 | Single-cylinder double-laser-head dust concentration sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023053480.8U CN213933492U (en) | 2020-12-17 | 2020-12-17 | Single-cylinder double-laser-head dust concentration sensor |
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| Publication Number | Publication Date |
|---|---|
| CN213933492U true CN213933492U (en) | 2021-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023053480.8U Active CN213933492U (en) | 2020-12-17 | 2020-12-17 | Single-cylinder double-laser-head dust concentration sensor |
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| Country | Link |
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| CN (1) | CN213933492U (en) |
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- 2020-12-17 CN CN202023053480.8U patent/CN213933492U/en active Active
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Denomination of utility model: A Single Cylinder Double Laser Head Dust Concentration Sensor Effective date of registration: 20231007 Granted publication date: 20210810 Pledgee: China Postal Savings Bank Co.,Ltd. Jining Branch Pledgor: Shandong Dongda Mechanical and Electrical Co.,Ltd. Registration number: Y2023980059968 |