Dust removal light transceiver device for coal quality analysis and method for coal quality analysis

Abstract

The application provides a dust-removing light transceiver device for coal quality analysis and a coal quality analysis method. The dust-removing light transceiver device comprises a shell, a light source mechanism, a reflected light collector, a support frame, a window sheet and a dust-removing mechanism. The support frame is fixed in the shell and is used for supporting the light source mechanism and the reflected light collector. The light source mechanism and the reflected light collector are both arranged obliquely relative to the window sheet. The window sheet is embedded in the bottom surface of the shell. The dust-removing mechanism is arranged outside the bottom surface of the shell. The light emitted by the light source mechanism is irradiated on a coal sample after passing through the window sheet. The reflected light of the coal sample is outputted outward after being converged by the reflected light collector after passing through the window sheet. The dust-removing mechanism is used for removing dust from the window sheet. The application prevents dust pollution, guarantees the stability of the light source, expands the recovery range of the reflected light of the coal sample and improves the light intensity.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal quality analysis, in particular to a dust removal light transceiver device for coal quality analysis and a coal quality analysis method. BACKGROUND

[0002] Coal is widely used in various industries as a fuel. Coal quality indicators include moisture, ash content, volatile matter, total sulfur, total moisture, and calorific value. Different coal qualities have different prices and applications, so coal quality analysis is needed.

[0003] The existing coal quality analysis technology uses on-site sampling and manual sample preparation in the laboratory for testing, which has a long detection time, low efficiency, and cannot adapt to coal quality detection of on-site coal dust with high dust.

[0004] The existing technology also uses a near-infrared spectrometer to detect the coal quality of coal samples. Specifically, coal dust is first sampled, and a near-infrared spectrometer is used in the laboratory to generate a spectrum of the coal sample. Then, a computer is used to analyze the coal quality of the spectrum. First, the above-mentioned near-infrared spectrometer also needs to pre-sample the coal dust, and the coal quality analysis of the coal sample cannot be performed online. In addition, the coal dust is usually dusty on site, and the dust falling on the window sheet of the light source will cause errors in the coal dust spectrum. Furthermore, the light source of the near-infrared spectrometer is perpendicular to the sample, and a lot of reflected light returns to the light source, and the reflected light entering the optical fiber is less.

[0005] Application No. 201610574583.8, entitled "Coal dust online analysis method and device", discloses an online analysis of coal dust. However, the light source and the detection probe of the patent application are separately arranged, and the light source is easily affected by dust, thereby affecting the stability of the light irradiated onto the coal sample. In addition, two light sources are used to irradiate the coal sample from different angles, so that the light spots of the coal sample detected by the detection probe do not completely overlap or even partially overlap, and the light intensity of the overlapping and non-overlapping parts is different, thereby affecting the accuracy of the coal quality analysis. SUMMARY

[0006] In view of one or more of the problems existing in the prior art, the present application provides a dust removal light transceiver device for coal quality analysis, comprising a shell, a light source mechanism, a reflected light collector, a support frame, a window sheet and a dust removal mechanism, the support frame is fixed in the shell, the support frame is used for supporting the light source mechanism and the reflected light collector, the light source mechanism and the reflected light collector are both arranged obliquely relative to the window sheet, the window sheet is embedded in the bottom surface of the shell, the dust removal mechanism is arranged outside the bottom surface of the shell, the light emitted by the light source mechanism is irradiated on the coal sample after passing through the window sheet, the reflected light of the coal sample is outputted outward after converging by the reflected light collector after passing through the window sheet, the dust removal mechanism is used for dust removal of the window sheet, the inclination angle of the light source mechanism relative to the window sheet is arranged to prevent the reflected light of the coal sample from returning to the light source mechanism after passing through the window sheet, and the inclination angle of the reflected light collector relative to the window sheet is arranged to make the reflected light of the coal sample transmitted through the window sheet to coincide in light spot in the reflected light collector.

[0007] According to one aspect of the present application, the dust removal mechanism comprises a scraper, one end of the scraper is provided with a brush towards the window sheet, and the window sheet is dusted by the brush.

[0008] According to one aspect of the present application, the scraper is rotatably connected with the bottom surface of the shell.

[0009] According to one aspect of the present application, the dust removal mechanism further comprises a motor, a rotor of the motor is connected with the scraper, and the scraper is rotated by the motor.

[0010] According to one aspect of the present application, the motor is a stepping motor.

[0011] According to one aspect of the present application, the dust removal mechanism further comprises a motor support seat for supporting the motor.

[0012] According to one aspect of the present application, the dust removal mechanism further comprises a limiting device for limiting the rotation angle of the scraper.

[0013] According to one aspect of the present application, the limiting device comprises a baffle, at least one photoelectric sensor and at least one limit switch, the baffle is gap-fitted with the rotor of the motor, the photoelectric sensor is provided with a groove, the scraper and the baffle are simultaneously rotated by driving the motor, the baffle enters the groove, the photoelectric sensor triggers the limit switch, and the motor stops rotating.

[0014] According to an aspect of the present application, the limiting device comprises a first photoelectric sensor, a first limit switch, a second photoelectric sensor, and a second limit switch, the second photoelectric sensor and the second limit switch are used to define the starting position of the wiper, when the stopper is located in the groove of the second photoelectric sensor, the second limit switch limits the wiper to the starting position, which is the position of the wiper away from the window sheet; the first photoelectric sensor and the first limit switch are used to define the rotation angle of the wiper during the dust removal process of the wiper rotating on the window sheet by the brush, when the stopper is located in the groove of the first photoelectric sensor, the first limit switch is triggered and the stopper stops rotating.

[0015] According to an aspect of the present application, the motor is wirelessly or wiredly connected with the first limit switch and the second limit switch, and is used to control the first limit switch and the second limit switch to switch between the limiting state and the opening state, when the second limit switch is in the opening state, the stopper moves towards the groove of the first photoelectric sensor, when the stopper is located in the groove of the first photoelectric sensor, the first limit switch is triggered, the first limit switch is in the limiting state, after a set time, the first limit switch is in the opening state, the stopper moves towards the groove of the second photoelectric sensor, when the stopper is located in the groove of the second photoelectric sensor, the second limit switch is triggered, and the second limit switch is in the limiting state.

[0016] According to an aspect of the present application, the height of the support frame is set so that the irradiation spot of the light source mechanism on the coal sample and the collection spot of the reflector on the coal sample overlap.

[0017] According to an aspect of the present application, the support frame further comprises a reference plate, which is arranged between the support frame and the bottom plate and coaxially arranged with the window sheet.

[0018] According to an aspect of the present application, the height of the support frame is set so that the irradiation spot of the light source mechanism on the reference plate and the collection spot of the reflector on the reference plate overlap, and the irradiation spot of the light source mechanism on the coal sample and the collection spot of the reflector on the coal sample overlap.

[0019] According to an aspect of the present application, the light source mechanism comprises a light source support seat, a light source, a reflector cup, and a collimating lens, the light source support seat is used to support the light source, the reflector cup is used to converge the light emitted by the light source to the collimating lens, and the collimating lens converts the convergent light beam into a parallel light beam.

[0020] According to an aspect of the present application, the light source mechanism further comprises a focal length adjusting mechanism, which is used to adjust the distance between the light source and the first collimating lens, so that the light emitted by the light source becomes a parallel light beam after passing through the collimating lens.

[0021] According to one aspect of the present application, the focal length adjusting mechanism comprises a lamp holder and a screw rod, the light source support seat is in a ring structure, the lamp holder is arranged in the light source support seat, the lamp holder is threadedly connected with the screw rod, and the screw rod is rotatably connected with the light source support seat. The lamp holder is made close to or away from the collimating lens by rotating the screw rod clockwise or counterclockwise.

[0022] According to one aspect of the present application, one end of the screw rod extends out of the light source support seat and is provided with a knob.

[0023] According to one aspect of the present application, the reflected light collector comprises a first converging lens, a light barrel and a second converging lens, the first converging lens is used for converging the reflected light of the sample passing through the window sheet into the light barrel, and the second converging lens is used for converging the light in the light barrel into the light transmission device for outward transmission.

[0024] According to one aspect of the present application, a collector support seat is further included, the collector support seat comprises a base and a rotating seat, one end of the base is fixed on the support frame, the other end of the base is rotatably connected with one end of the rotating seat, and the other end of the rotating seat is fixedly connected with the reflected light collector.

[0025] According to another aspect of the present application, a method for coal quality analysis by using the above-mentioned dust-removing light transceiver device for coal quality analysis is provided, which comprises:

[0026] When there is no coal sample under the dust-removing light transceiver device, the window sheet is dusted one or more times by the dust-removing mechanism;

[0027] When there is a coal sample under the dust-removing light transceiver device, the dust-removing mechanism is moved away from the window sheet;

[0028] The light emitted by the light source mechanism is transmitted through the window sheet and then irradiated on the coal sample;

[0029] The reflected light of the coal sample is transmitted through the window sheet and then enters the reflected light collector;

[0030] The reflected light of the sample collected by the reflected light collector generates a spectrum of the coal quality, and the coal quality is analyzed by the spectrum;

[0031] After the coal quality analysis is completed, the window sheet is dusted one or more times by the dust-removing mechanism.

[0032] According to another aspect of the present application, the step that the light emitted by the light source mechanism is transmitted through the window sheet and then irradiated on the coal sample further comprises a step of calibrating the dust-removing light transceiver device, and the step of calibrating the dust-removing light transceiver device comprises:

[0033] The light is irradiated on a standard substance by the light source mechanism;

[0034] Adjust the tilt angle of the light source mechanism, and obtain the spectrum of the standard substance under different tilt angles;

[0035] Compare the above spectrum with the standard spectrum of the standard substance, and take the tilt angle corresponding to the spectrum with the most similar peak shape of the absorbance characteristic peak as the optimal tilt angle of the light source mechanism;

[0036] Adjust the tilt angle of the reflected light collector, and obtain the signal-to-noise ratio of the spectrum of the standard substance under different tilt angles of the reflected light collector;

[0037] Take the tilt angle corresponding to the highest signal-to-noise ratio as the optimal tilt angle of the reflected light collector.

[0038] According to another aspect of the present application, the step of irradiating light on the standard substance by the light source mechanism further comprises:

[0039] Adjust the distance between the light source and the collimating lens so that the light emitted by the light source becomes a parallel light beam after passing through the collimating lens.

[0040] The dust removal light transceiver device for coal quality analysis in the present application is independent of the monochromator or interferometer for generating the spectrum, and in different application occasions, the dust removal light transceiver device can be connected with the monochromator or interferometer. In addition, the dust removal light transceiver device in the present application can be arranged above the coal sample on the conveying belt to realize online continuous collection of the coal sample, and the monochromator or interferometer can be connected with the dust removal light transceiver device through an optical fiber, away from the coal sample, to prevent the influence of dust on interference.

[0041] The present application adopts a single light source built-in in the dust removal light transceiver device, which prevents dust from polluting the light source while ensuring the stability of the light source.

[0042] The present application adopts a dust removal mechanism to remove dust from the window sheet, which prevents the influence of dust on the optical path on the window sheet, ensures the stability of the optical path, and improves the accuracy of coal sample spectrum and coal quality analysis.

[0043] The light source mechanism in the present application is inclined relative to the window sheet, which prevents the reflected light of the coal sample from returning to the light source mechanism after passing through the window sheet, so that the reflected light collector can recover almost all the reflected light of the coal sample; the reflected light collector in the present application is also inclined relative to the window sheet, so that the reflected light of the coal sample coincides in the reflected light collector after passing through the window sheet, which prevents the influence of partial overlap and non-overlap of the light spots on the light intensity of the coal sample spectrum, and improves the accuracy of coal sample analysis. BRIEF DESCRIPTION OF DRAWINGS

[0044] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, which together with the embodiments of the present application serve to explain the present application, and do not constitute a limitation on the present application. In the drawings:

[0045] Figure 1is a perspective view of the dust-removing light transceiver device for coal quality analysis according to the present application;

[0046] Figure 2 is a schematic view of the internal structure of the dust-removing light transceiver device for coal quality analysis according to the present application;

[0047] Figure 3 is a semi-sectional view of the dust-removing light transceiver device for coal quality analysis according to the present application;

[0048] Figure 4 is a plan view of the relative position of the dust-removing mechanism, the housing and the window sheet according to the present application;

[0049] Figure 5 is a perspective view of the dust-removing mechanism according to the present application;

[0050] Figure 6 is an exploded view of the dust-removing mechanism according to the present application;

[0051] Figure 7 is a schematic view of the collector support according to the present application;

[0052] wherein the housing 100, the bottom surface 101, the light source mechanism 200, the light source support 201, the light source 202, the light-reflecting cup 203, the collimating lens 204, the lamp holder 205, the screw 206, the knob 207, the light-reflecting collector 300, the first converging lens 301, the light cylinder 302, the second converging lens 303, the collector support 400, the base 401, the rotating seat 402, the support frame 500, the window sheet 600, the window sheet pressing plate 601, the dust-removing mechanism 700, the scraper 701, the brush 702, the pressing plate 703, the motor 704, the motor connector 705, the blocking sheet 706, the first photoelectric sensor 707, the first limit switch 708, the second photoelectric sensor 709, the second limit switch 710, the motor support 711. DETAILED DESCRIPTION

[0053] In the following, only certain exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting.

[0054] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. Of course, they are merely examples and are not intended to limit the present application. Preferred embodiments of the application are described below in connection with the appended drawings, and it is understood that the embodiments described in the context of these preferences merely for illustrative purposes and are not intended to limit the present application.

[0055] Figure 1is a perspective view of the dust-removing light receiving and transmitting device for coal quality analysis according to the present application, Figure 2 is a schematic view of the internal structure of the dust-removing light receiving and transmitting device for coal quality analysis according to the present application; Figure 3 is a semi-sectional view of the dust-removing light receiving and transmitting device for coal quality analysis according to the present application, as shown in Figure 1 , Figure 2 and Figure 3 , the dust-removing light receiving and transmitting device comprises a housing 100, a light source mechanism 200, a reflected light collector 300, a support frame 500, a window sheet 600 and a dust-removing mechanism 700, the support frame 500 is fixed in the housing 100, the support frame 500 is used to support the light source mechanism 200 and the reflected light collector 300, the light source mechanism 200 and the reflected light collector 300 are both arranged obliquely relative to the window sheet 600, the window sheet 600 is embedded in the bottom surface 101 of the housing 100, the dust-removing mechanism 700 is arranged outside the bottom surface 101 of the housing 100, the light emitted by the light source mechanism 200 is irradiated on the coal sample after passing through the window sheet 600, the reflected light of the coal sample is outputted outward after converging by the reflected light collector 300 after passing through the window sheet 600, the dust-removing mechanism is used to remove dust from the window sheet 600, the oblique angle of the light source mechanism 200 relative to the window sheet 600 is arranged to prevent the reflected light of the coal sample from returning to the light source mechanism 200 after passing through the window sheet 600, the oblique angle of the reflected light collector 300 relative to the window sheet 600 is arranged to make the reflected light of the coal sample transmitted through the window sheet 600 to coincide in the reflected light collector 300.

[0056] Figure 4 is a plan view of the relative positions of the dust-removing mechanism and the housing 100 and the window sheet 600 according to the present application, Figure 5 is a perspective view of the dust-removing mechanism 700 according to the present application, Figure 6 is an exploded view of the dust-removing mechanism 700 according to the present application, as shown in Figure 4 , Figure 5 and Figure 6 , the dust-removing mechanism 700 comprises a scraper 701, one end of the scraper 701 towards the window sheet 600 is provided with a brush 702, and the window sheet 600 is dusted by the brush 702.

[0057] In one embodiment, the dust-removing mechanism 700 further comprises a pressing plate 703, the pressing plate 703 is used to press the brush 702 into the scraper 701, facilitating the replacement of the brush 702.

[0058] In one embodiment, the scraper 701 is rotatably connected with the bottom surface 101 of the housing 100.

[0059] As shown in Figure 4 , Figure 5 and Figure 6As shown, the dust removal mechanism 700 further comprises a motor 704, a rotor of the motor 704 being connected with the scraper 701, and the motor 704 drives the scraper 701 to rotate through electrical rotation.

[0060] In one embodiment, the dust removal mechanism 700 further comprises a limiting device for limiting the rotation angle of the scraper 701.

[0061] As shown in Figure 4 , Figure 5 and Figure 6 , the limiting device comprises a baffle 706, at least one photoelectric sensor and at least one limit switch, the baffle 706 is in clearance fit with the rotor of the motor 704, the photoelectric sensor is provided with a groove, the motor 704 drives the scraper 701 and the baffle 706 to rotate at the same time, the baffle 706 enters the groove, the photoelectric sensor triggers the limit switch, and the motor 704 stops rotating.

[0062] Preferably, the dust removal mechanism 700 further comprises a motor support seat 711 for supporting the motor 704, and for supporting the limit switch and the photoelectric sensor, the limit switch is arranged on the side of the motor support seat 711 facing the support frame 500, and the photoelectric sensor is embedded in the motor support seat 711, and the groove of the photoelectric sensor faces the bottom surface 101 of the housing 100.

[0063] In one embodiment, as shown in Figure 4 , Figure 5 and Figure 6 , the limiting device comprises a first photoelectric sensor 707, a first limit switch 708, a second photoelectric sensor 709 and a second limit switch 710, the second photoelectric sensor 709 and the second limit switch 710 are used to define the starting position of the scraper 701, when the baffle 706 is located in the groove of the second photoelectric sensor 709, the second limit switch 710 limits the scraper 701 to the starting position, and the starting position is the position of the scraper 701 away from the window pane 600; the first photoelectric sensor 707 and the first limit switch 708 are used to define the rotation angle of the scraper 701 during the dust removal process of the scraper 701 rotating on the window pane 600 through the brush 702, when the baffle 706 is located in the groove of the first photoelectric sensor 707, the first limit switch 708 is triggered, and the baffle 706 stops rotating.

[0064] Preferably, the motor 704 is wirelessly or wired connected with the first limit switch 708 and the second limit switch 710 for controlling the first limit switch 708 and the second limit switch 710 to switch between the limit state and the open state, when the second limit switch is in the open state, the baffle 706 moves towards the groove of the first photoelectric sensor 707, when the baffle 706 is in the groove of the first photoelectric sensor 707, the first limit switch 708 is triggered, the first limit switch 708 is in the limit state, after a set time, the first limit switch 708 is in the open state, the baffle 706 moves towards the groove of the second photoelectric sensor 709, when the baffle 706 is in the groove of the second photoelectric sensor 709, the second limit switch 710 is triggered, the second limit switch 710 is in the limit state.

[0065] The above-mentioned limit device makes the brush 702 on the scraper 701 continuously dust the window sheet 600, prevents the brush 702 on the scraper 701 from being separated from the window sheet 600 during the dusting process, and makes the scraper 701 automatically return to the initial position after the brush 702 is dusted.

[0066] In an embodiment, the motor 704 is a stepper motor 704.

[0067] In an embodiment, the limit switch is a photoelectric limit switch.

[0068] In an embodiment, as shown in Figure 6 , the window sheet pressing plate 601 is further included, and the window sheet is fixed in the bottom surface of the shell through the window sheet pressing plate 601.

[0069] Preferably, the window sheet is in a stepped structure, the step of the window sheet faces the outside of the shell, facilitates the pressing of the window sheet pressing plate 601, and facilitates the dusting of the dusting mechanism 700.

[0070] In an embodiment, as shown in Figure 1 and Figure 2 , the dusting mechanism 700 further includes a motor connector 705, and the motor connector 705 is used for power supply of the motor 704.

[0071] Preferably, the motor connector 705 is fixed on the bottom surface 101 of the shell 100.

[0072] Preferably, one end of the motor connector 705 is connected with a power supply (for example, connected with the power supply through a USB interface), and the other end of the motor connector 705 is connected with the motor 704.

[0073] In an embodiment, as shown in Figure 3As shown, the height of the support frame 500 is set such that the irradiation spot of the light source mechanism 200 on the coal sample coincides with the collection spot of the reflected light collector 300 on the coal sample.

[0074] Preferably, a reference plate (not shown) is further included, which is disposed between the support frame 500 and the bottom plate and coaxially disposed with the window sheet 600.

[0075] Further, the height of the support frame 500 is set such that the irradiation spot of the light source mechanism 200 on the reference plate overlaps with the collection spot of the reflected light collector 300 on the reference plate and such that the irradiation spot of the light source mechanism 200 on the coal sample coincides with the collection spot of the reflected light collector 300 on the coal sample.

[0076] In one embodiment, as shown in Figure 3 The light source mechanism 200 includes a light source support seat 201 for supporting a light source 202, a light cup 203 for converging light emitted by the light source 202 to a collimating lens 204, and the collimating lens 204 for converting the converging light beam into a parallel light beam.

[0077] In one embodiment, as shown in Figure 3 The light source mechanism 200 further includes a focal length adjustment mechanism for adjusting the distance between the light source 202 and the first collimating lens 204, so that the light emitted by the light source 202 becomes a parallel light beam after passing through the collimating lens 204.

[0078] As shown in Figure 3 The focal length adjustment mechanism includes a lamp holder 205 and a screw rod 206, the light source support seat 201 is in a ring structure, the lamp holder 205 is disposed in the light source support seat 201, the lamp holder 205 is threadedly connected with the screw rod 206, the screw rod 206 is rotatably connected with the light source support seat 201, and rotating the screw rod 206 clockwise or counterclockwise causes the lamp holder 205 to move closer to or farther away from the collimating lens 204.

[0079] Preferably, one end of the screw rod 206 extends out of the light source support seat 201 and is provided with a knob 207.

[0080] In one embodiment, as shown in Figure 3 The reflected light collector 300 includes a first converging lens 301 for converging the reflected light of the sample passing through the window sheet 600 into a light cylinder 302, a second converging lens 303 for converging the light in the light cylinder 302 into a light transmission device (such as an optical fiber) for outward transmission.

[0081] As shown in Figure 7As shown, the dust-removing light transceiver device further comprises a collector support seat 400, which comprises a collecting base 401 and a rotating seat 402. One end of the collecting base 401 is fixed on the support frame 500, and the other end of the collecting base 401 is rotatably connected to one end of the rotating seat 402. The other end of the rotating seat 402 is fixedly connected to the reflected light collector 300.

[0082] The method for coal quality analysis by the dust-removing light transceiver device for coal quality analysis comprises the following steps.

[0083] When there is no coal sample under the dust-removing light transceiver device, the window sheet 600 is dusted one or more times by the dust-removing mechanism 700.

[0084] When there is a coal sample under the dust-removing light transceiver device, the dust-removing mechanism 700 is moved away from the window sheet 600.

[0085] The light emitted by the light source mechanism 200 is transmitted through the window sheet 600 and then shines on the coal sample.

[0086] The reflected light of the coal sample is transmitted through the window sheet 600 and then enters the reflected light collector 300.

[0087] The reflected light of the sample collected by the reflected light collector 300 generates a spectrum of the coal quality, and the coal quality is analyzed by the spectrum.

[0088] After the coal quality analysis is completed, the window sheet 600 is dusted one or more times by the dust-removing mechanism 700.

[0089] In an embodiment, the step of the light emitted by the light source mechanism 200 being transmitted through the window sheet 600 and then shining on the coal sample further comprises a step of calibrating the dust-removing light transceiver device, which comprises the following steps.

[0090] The light is irradiated on the standard substance by the light source mechanism 200.

[0091] The inclination angle of the light source mechanism 200 is adjusted to obtain the spectrum of the standard substance at different inclination angles.

[0092] The above spectrum is compared with the standard spectrum of the standard substance, and the inclination angle corresponding to the spectrum with the most similar peak shape of the absorbance characteristic peak is taken as the optimal inclination angle of the light source mechanism 200.

[0093] The inclination angle of the reflected light collector 300 is adjusted to obtain the signal-to-noise ratio of the spectrum of the standard substance at different inclination angles of the reflected light collector 300.

[0094] The inclination angle corresponding to the highest signal-to-noise ratio is taken as the optimal inclination angle of the reflected light collector 300.

[0095] Preferably, the step of irradiating the standard substance with light by the light source mechanism 200 further comprises, before the step:

[0096] The distance between the light source 202 and the collimating lens 204 is adjusted so that the light emitted by the light source 202 becomes a parallel light beam after passing through the collimating lens 204.

[0097] The present application adopts a single light source built-in and dust removal mechanism to remove dust from the window sheet to prevent dust pollution, ensure the stability of the light path, and through the light source mechanism and the reflected light collector, the light source mechanism and the reflected light collector are inclined relative to the window sheet, which not only expands the recovery range of the reflected light of the coal sample, but also improves the light intensity.

[0098] The above is the preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A dust-collecting optical transceiver for coal quality analysis, characterized in that, The device includes a housing, a light source mechanism, a reflective light collector, a support frame, a window, and a dust removal mechanism. The support frame is fixed inside the housing and supports the light source mechanism and the reflective light collector. Both the light source mechanism and the reflective light collector are inclined relative to the window. The window is embedded in the bottom surface of the housing, and the dust removal mechanism is located on the outside of the bottom surface of the housing. The light emitted by the light source mechanism shines on the coal sample after passing through the window. The reflected light from the coal sample passes through the window and is converged by the reflective light collector before being output outward. The dust removal mechanism is used to remove dust from the window. The tilt angle of the light source mechanism relative to the window is set to prevent the reflected light from the coal sample from returning to the light source mechanism after passing through the window. The tilt angle of the reflective light collector relative to the window is set to make the reflected light from the coal sample transmitted through the window overlap the light spots inside the reflective light collector. The reflected light collector includes a first converging lens, a light tube, and a second converging lens. The first converging lens is used to converge the reflected light from the sample passing through the window into the light tube, and the second converging lens is used to converge the light in the light tube into the outward-transmitting light transmission device. The dust removal optical transceiver device for coal quality analysis further includes a collector support base, which includes a base and a rotating base. One end of the base is fixed to a support frame, and the other end of the base is rotatably connected to one end of the rotating base. The other end of the rotating base is fixedly connected to a reflected light collector. The dust-removing optical transceiver device for coal quality analysis uses a light source mechanism to irradiate light onto a standard substance. By adjusting the tilt angle of the light source mechanism, the spectra of standard substances at different tilt angles can be obtained; By comparing the above spectrum with the standard spectrum of the standard substance, the tilt angle corresponding to the spectrum with the most similar absorbance characteristic peak shape is taken as the optimal tilt angle of the light source mechanism. Adjust the tilt angle of the reflected light collector to obtain the signal-to-noise ratio of the spectrum of the standard material at different tilt angles; The tilt angle corresponding to the highest signal-to-noise ratio is taken as the optimal tilt angle of the reflected light collector.

2. The dust-collecting optical transceiver device for coal quality analysis according to claim 1, characterized in that, The dust removal mechanism includes a scraper, and a brush is provided at one end of the scraper facing the window slat to remove dust from the window slat.

3. The dust-collecting optical transceiver device for coal quality analysis according to claim 2, characterized in that, The scraper is rotatably connected to the bottom surface of the outer casing.

4. The dust-collecting optical transceiver device for coal quality analysis according to claim 2, characterized in that, The dust removal mechanism also includes a motor, the rotor of which is connected to the scraper and drives the scraper to rotate via electric rotation.

5. The dust-collecting optical transceiver device for coal quality analysis according to claim 4, characterized in that, The motor is a stepper motor.

6. The dust-collecting optical transceiver for coal quality analysis according to claim 4, characterized in that, The dust removal mechanism also includes a motor support base for supporting the motor.

7. The dust-collecting optical transceiver for coal quality analysis according to claim 2, characterized in that, The dust removal mechanism also includes a limiting device, which is used to limit the rotation angle of the scraper.

8. The dust-collecting optical transceiver for coal quality analysis according to claim 7, characterized in that, The limiting device includes a baffle, at least one photoelectric sensor, and at least one limit switch. The baffle is in clearance fit with the rotor of the motor. The photoelectric sensor is provided with a groove. The drive motor drives the scraper and the baffle to rotate simultaneously. The baffle enters the groove, and the photoelectric sensor triggers the limit switch, causing the motor to stop.

9. The dust-collecting optical transceiver for coal quality analysis according to claim 7, characterized in that, The limiting device includes a first photoelectric sensor and a first limit switch, a second photoelectric sensor and a second limit switch. The second photoelectric sensor and the second limit switch are used to limit the starting position of the scraper. When the baffle is located in the groove of the second photoelectric sensor, the second limit switch restricts the scraper to the starting position, which is the position where the scraper is away from the window slat. The first photoelectric sensor and the first limit switch are used to limit the rotation angle of the scraper during the dust removal process by the scraper rotating on the window slat through the brush. When the baffle is located in the groove of the first photoelectric sensor, the first limit switch is triggered, and the baffle stops rotating.

10. The dust-collecting optical transceiver for coal quality analysis according to claim 9, characterized in that, The motor is wirelessly or wiredly connected to the first and second limit switches to control the switching between the first and second limit switches in a limited state and an open state. When the second limit switch is in the open state, the baffle moves toward the groove of the first photoelectric sensor. When the baffle is located in the groove of the first photoelectric sensor, it triggers the first limit switch, and the first limit switch is in the limited state. After a set time, the first limit switch is in the open state, the baffle moves toward the groove of the second photoelectric sensor, and when the baffle is located in the groove of the second photoelectric sensor, it triggers the second limit switch, and the second limit switch is in the limited state.

11. The dust-collecting optical transceiver for coal quality analysis according to claim 1, characterized in that, The height of the support frame is set so that the illumination spot of the light source mechanism on the coal sample coincides with the collection spot of the reflected light collector on the coal sample.

12. The dust-collecting optical transceiver for coal quality analysis according to claim 11, characterized in that, It also includes a reference plate, which is disposed between the support frame and the base plate and is coaxial with the window slab.

13. The dust-collecting optical transceiver for coal quality analysis according to claim 12, characterized in that, The height of the support frame is set such that the illumination spot of the light source mechanism on the reference plate overlaps with the collection spot of the reflected light collector on the reference plate, and the illumination spot of the light source mechanism on the coal sample coincides with the collection spot of the reflected light collector on the coal sample.

14. The dust-collecting optical transceiver for coal quality analysis according to claim 1, characterized in that, The light source mechanism includes a light source support, a light source, a reflector, and a collimating lens. The light source support is used to support the light source, the reflector is used to converge the light emitted by the light source to the collimating lens, and the collimating lens converts the converged light beam into a parallel light beam.

15. The dust-collecting optical transceiver for coal quality analysis according to claim 14, characterized in that, The light source mechanism also includes a focal length adjustment mechanism, which is used to adjust the distance between the light source and the first collimating lens, so that the light emitted by the light source becomes a parallel beam after passing through the collimating lens.

16. The dust-collecting optical transceiver for coal quality analysis according to claim 15, characterized in that, The focus adjustment mechanism includes a lamp holder and a screw. The light source support is in the form of a ring structure. The lamp holder is disposed inside the light source support. The lamp holder is threadedly connected to the screw. The screw is rotatably connected to the light source support. The lamp holder moves closer to or further away from the collimating lens by rotating the screw clockwise or counterclockwise.

17. The dust-collecting optical transceiver for coal quality analysis according to claim 16, characterized in that, One end of the screw extends out of the light source support and is equipped with a knob.

18. A method for coal quality analysis using the dust-collecting optical transceiver device for coal quality analysis as described in any one of claims 1-17, characterized in that, include: When there is no coal sample under the dust removal optical transceiver, the window is dusted once or multiple times by the dust removal mechanism. When there is a coal sample under the dust removal optical transceiver, move the dust removal mechanism away from the window. The light emitted by the light source mechanism shines onto the coal sample after being transmitted through the window. The reflected light from the coal sample is transmitted through the window and then enters the reflected light collector. The reflected light from the sample collected by the reflected light collector generates a spectrum of coal quality, which is then used for coal quality analysis. After the coal quality analysis is completed, the window panes are dusted once or multiple times by a dust removal mechanism.

19. The method for coal quality analysis according to claim 18, characterized in that, Before the step of the light emitted by the light source mechanism shining on the coal sample after being transmitted through the window, the method further includes a step of calibrating the dust removal optical transceiver device. The calibration step of the dust removal optical transceiver device includes: Light is shone onto the standard substance through a light source mechanism; By adjusting the tilt angle of the light source mechanism, the spectra of standard substances at different tilt angles can be obtained; By comparing the above spectrum with the standard spectrum of the standard substance, the tilt angle corresponding to the spectrum with the most similar absorbance characteristic peak shape is taken as the optimal tilt angle of the light source mechanism. Adjust the tilt angle of the reflected light collector to obtain the signal-to-noise ratio of the spectrum of the standard material at different tilt angles; The tilt angle corresponding to the highest signal-to-noise ratio is taken as the optimal tilt angle of the reflected light collector.

20. The method for coal quality analysis according to claim 19, characterized in that, Prior to the step of irradiating the standard material with light through the light source mechanism, the following also includes: Adjust the distance between the light source and the collimating lens so that the light emitted by the light source becomes a parallel beam after passing through the collimating lens.

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