CN220438203U - Tobacco material moisture content online detection system based on space transmission microwave method - Google Patents
Tobacco material moisture content online detection system based on space transmission microwave method Download PDFInfo
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- CN220438203U CN220438203U CN202321997484.2U CN202321997484U CN220438203U CN 220438203 U CN220438203 U CN 220438203U CN 202321997484 U CN202321997484 U CN 202321997484U CN 220438203 U CN220438203 U CN 220438203U
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- 235000002637 Nicotiana tabacum Nutrition 0.000 title claims abstract description 29
- 244000061176 Nicotiana tabacum Species 0.000 title 1
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Abstract
The utility model provides a tobacco material moisture content online detection system based on a space transmission microwave method, which comprises a front laser radar, a middle laser radar, a rear laser radar, a material gathering mechanism, a material flattening mechanism, a microwave moisture detection device and a control system, wherein the front laser radar is arranged in the middle; the front laser radar is arranged in front of the material gathering mechanism and is used for detecting the initial thickness of the material; the middle laser radar is arranged behind the material gathering mechanism and in front of the material flattening mechanism and is used for detecting the middle thickness of the material after the material flows through the gathering; the rear laser radar is arranged behind the material flattening mechanism and is used for detecting the actual thickness of the flattened material; the control system is used for controlling the furling degree of the material furling mechanism, the flattening degree of the material flattening mechanism and the detection distance between the microwave moisture detection device and the material respectively. The system has the advantages of being suitable for measuring the moisture content of tobacco materials by a space transmission microwave method, high in detection precision and suitable for tobacco production line application.
Description
Technical Field
The utility model relates to the technical field of tobacco manufacturing, in particular to a tobacco material moisture content online detection system based on a space transmission microwave method.
Background
At present, a plurality of parts on a material conveying line in the cigarette processing process are required to detect moisture of tobacco leaves or tobacco shreds so as to ensure the related moisture content requirement.
The method for detecting the moisture of the tobacco materials is divided into a direct detection method and an indirect detection method. The direct detection method is to directly remove or extract water in the sample by a drying or chemical method, and detect the water content of the sample. However, the direct detection method is suitable for laboratory scenes and is not suitable for online detection. The indirect measurement method is a detection method for determining the water content by detecting the change of physical quantities such as electric quantity or non-electric quantity related to the water content of materials. Currently, an infrared moisture meter is generally adopted for online indirect detection of moisture of leaves or tobacco shreds, but the online indirect detection has limitations: 1) The near infrared method collects spectrum information on the surface of the sample, so that the water content in the material is difficult to detect; 2) The spectrum signal is interfered by the surface color of the sample, so that the water content detection precision is affected; 3) The size of the particle size of the material can influence the detection precision.
The microwave detection technology can detect through space radiation or a mode of penetrating through the inside of a medium, the principle of detecting moisture by a microwave method is to calculate the moisture content of the material by utilizing the microwave characteristics of water and the power change, amplitude change, phase change or frequency change information generated by the action of microwaves on the material, wherein the measured value is volume total water instead of surface water, the moisture detection result is good in representativeness, and the moisture detection method is not influenced by factors such as environmental dust, light, sample color and the like, so that the method is very suitable for the detection environment of tobacco moisture.
However, the microwave detection technology is not applied to the moisture detection of tobacco at present, the encountered obstacle is mainly the design of a measurement mode, the measurement mode of the microwave detection is divided into a space wave method, a transmission line method and a resonant cavity method, wherein the space wave transmission method is used for detecting through the mode that space radiation passes through the inside of a medium, and the method has the advantages of non-contact measurement, no influence on the grain production and processing process, representativeness of measurement results and the like, but the method is a technical problem which needs to be solved urgently at present when the method is applied to a tobacco transmission line.
In order to solve the above problems, an ideal technical solution is always sought.
Disclosure of Invention
The utility model aims at overcoming the defects of the prior art, and provides the tobacco material moisture content online detection system based on the space transmission microwave method, which is adaptive to the space transmission microwave method for measuring the tobacco material moisture content, has high detection precision and is suitable for tobacco production line application.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the system comprises a front laser radar, a middle laser radar, a rear laser radar, a material gathering mechanism, a material flattening mechanism, a microwave moisture detection device and a control system;
the material gathering mechanism, the material flattening mechanism and the microwave moisture detection device are sequentially arranged along the material conveying direction;
the front laser radar is arranged in front of the material gathering mechanism and is used for detecting the initial thickness of the material and sending the initial thickness to the control system;
the middle-arranged laser radar is arranged behind the material gathering mechanism and in front of the material flattening mechanism, and is used for detecting the thickness of the material flowing through the middle after gathering and before flattening and sending the material flowing through the middle thickness to the control system;
the rear laser radar is arranged behind the material flattening mechanism, is used for detecting the actual thickness of flattened materials and is sent to the control system;
the control system adjusts the furling degree of the material furling mechanism according to the initial thickness of the material; the control system controls the flattening degree of the material flattening mechanism according to the thickness of the material after being gathered; the control system controls the detection distance between the microwave moisture detection device and the material according to the thickness of the flattened material.
The microwave moisture detection device comprises a detection main body, a pair of microwave transmitting antennas and a movement mechanism, wherein the detection main body is respectively connected with the pair of microwave transmitting antennas, the pair of microwave transmitting antennas are oppositely arranged above and below the material, and the movement mechanism is used for driving the pair of microwave transmitting antennas to be close to or far away from each other.
The motion mechanism comprises a detection screw rod transmission mechanism which moves reversely and symmetrically, and a pair of microwave transmitting antennas are respectively fixedly connected with two nuts which move reversely of the detection screw rod transmission mechanism.
The material gathering mechanism comprises a pair of gathering panels and a gathering screw rod transmission mechanism which moves reversely and symmetrically, and the pair of gathering panels are respectively fixedly connected with two nuts which move reversely of the gathering screw rod transmission mechanism.
The pair of folding panels are arranged in a horn mouth shape, and the opening direction of the horn mouth is opposite to the material moving direction.
The material folding mechanism further comprises a folding height adjusting mechanism, and the folding height adjusting mechanism and the folding screw rod transmission mechanism form a two-stage motion platform.
The material flattening mechanism comprises a flattening lifting mechanism and a flattening panel, the bottom surface of the flattening panel is a pushing plane, the pushing plane is obliquely arranged from the front upper part to the rear lower part, and the flattening lifting mechanism drives the flattening panel to adjust the flattening height.
Based on the above, the moving parts of the material gathering mechanism and the microwave moisture detection device are both screw rod transmission mechanisms; the moving parts of the folding height adjusting mechanism and the material flattening mechanism are both ball screw mechanisms.
Compared with the prior art, the utility model has substantial characteristics and progress, and in particular has the following advantages:
1. the method comprises the steps of carrying out on-line detection on the moisture content of tobacco materials by means of a space transmission microwave method, wherein in order to overcome the influence of the thickness of the materials on the space transmission microwave method, a front laser radar is respectively arranged to detect initial thickness, a material gathering mechanism is arranged to adjust thickness, then a middle laser radar is arranged to carry out secondary detection on the adjusted thickness, then the upper surface of the materials is flattened by a material flattening mechanism, finally the rear laser radar is used for detection, the height of a transmitting antenna of a microwave moisture detection device from the surface of the materials is determined, and finally the accuracy of on-line detection of moisture is guaranteed.
2. The material gathering mechanism adopts a pair of gathering panels which can be relatively far away or close to each other and are in a horn mouth shape, and the thickness of the material is adjusted by gathering the material.
3. The material flattening mechanism adopts a liftable flattening panel, the bottom of the flattening panel is an inclined pushing plane, and the surface of the gathered material can be flattened so as to meet the requirement of the microwave moisture detection device on the shape of the material.
4. The high-precision online detection of the system can assist the existing infrared moisture meter to conduct online calibration, and the high-precision online detection and the online calibration participate in detection together, so that the efficiency and the precision are improved.
Drawings
Fig. 1 is a schematic structural diagram of an online detection system for the moisture content of tobacco materials based on a space transmission microwave method.
Fig. 2 is a schematic structural diagram of an online detection system for the moisture content of tobacco materials based on a space transmission microwave method.
Fig. 3 is a schematic structural view of a material gathering mechanism in the present utility model.
FIG. 4 is a schematic view of the material flattening mechanism of the present utility model.
Fig. 5 is a schematic structural view of a microwave moisture detecting device in the present utility model.
In the figure: 1. a front laser radar; 2. a laser radar is arranged in the middle; 3. a rear laser radar; 4. a material gathering mechanism; 5. a material flattening mechanism; 6. a microwave moisture detection device; 7. a frame; 8. a conveyor belt;
41. folding the panel; 42. a folding screw rod transmission mechanism; 43. a folding height adjusting mechanism; 51. a flattening lifting mechanism; 52. flattening the panel; 53. pushing a plane; 61. a microwave transmitting antenna; 62. a movement mechanism; 63. and detecting the main body.
Detailed Description
The technical scheme of the utility model is further described in detail through the following specific embodiments.
As shown in fig. 1-5, the tobacco material moisture content online detection system based on the space transmission microwave method comprises a rack 7, a front laser radar 1, a middle laser radar 2, a rear laser radar 3, a material gathering mechanism 4, a material flattening mechanism 5, a microwave moisture detection device 6 and a control system, wherein the front laser radar 1, the middle laser radar 2, the rear laser radar 3, the material gathering mechanism 4, the material flattening mechanism 5 and the microwave moisture detection device 6 are all installed based on the rack 7.
The material gathering mechanism 4, the material flattening mechanism 5 and the microwave moisture detecting device 6 are sequentially arranged along the material conveying direction, and in the embodiment, are all installed based on the conveying belt 8.
The front laser radar 1 is arranged in front of the material gathering mechanism 4 and is used for detecting the initial thickness of the material and sending the initial thickness to the control system, the detection direction is from top to bottom, the laser radar can detect the section information of the material, including thickness, wave crest information, wave trough information and the like, and the thickness of the material under the current section can be obtained by sending the information to the control system, so that a basis is provided for adjustment of the material gathering mechanism 4.
The central laser radar 2 is arranged behind the material gathering mechanism 4 and in front of the material flattening mechanism 5, and is used for detecting the thickness of the material flowing through the middle after gathering and before flattening and sending the material to the control system, the principle is the same as that of the front laser radar 1, the main function of the central laser radar is to provide a basis for adjusting the flattening height of the material flattening mechanism 5, and the flattening of the material surface is the detection requirement of a space transmission microwave method.
The rear laser radar 3 is arranged behind the material flattening mechanism 5 and is used for detecting the actual thickness of flattened materials and sending the actual thickness to the control system, and the principle is the same as that of the front laser radar 1, and the main function of the rear laser radar is to provide adjustment basis for the detection work of the microwave moisture detection device 6, so that the distance between the transmitting antenna of the microwave moisture detection device 6 and a detection object is required to be controlled, and the detection accuracy is improved.
Specifically, the material gathering mechanism 4 includes a pair of gathering panels 41 and a gathering screw transmission mechanism 42 that moves in a reverse symmetry, the pair of gathering panels 41 are respectively and fixedly connected with two nuts that move in a reverse direction of the gathering screw transmission mechanism 42, the pair of gathering panels 41 are arranged in a horn mouth shape, and the opening direction of the horn mouth is opposite to the material moving direction.
The horn mouth shape design can gather materials from two sides to the middle, so that the stacking height of the materials is improved; the folding screw rod transmission mechanism 42 with reverse symmetrical movement specifically refers to a screw rod mechanism formed by a screw rod with reverse threads at two ends and two matched nuts with reverse movement, other accessories also comprise a driving motor, a track, a sliding block, a supporting seat and the like, and in other embodiments, the folding screw rod transmission mechanism 42 can also be replaced by two independent screw rod mechanisms, a linear motor, an electric telescopic rod and the like.
The material folding mechanism further comprises a folding height adjusting mechanism 43, the folding height adjusting mechanism 43 and the folding screw rod transmission mechanism 42 form a two-stage motion platform, the adjustment of the height and the folding distance can be completed, and the folding height adjusting mechanism 42 adopts a ball screw transmission mechanism in the embodiment and specifically comprises a bottom plate, a motor, a coupler, a guide rail sliding block, a ball screw, a support and the like.
The control system adjusts the furling degree and the adjusting height of the material furling mechanism according to the initial thickness of the material detected by the front laser radar 1, and carries out real-time furling adjustment on the material.
The material flattening mechanism 5 comprises a flattening lifting mechanism 51 and a flattening panel 52, the bottom surface of the flattening panel 52 is a pushing plane 53, the pushing plane 53 is obliquely arranged from the front upper part to the rear lower part, the flattening lifting mechanism drives the flattening panel to adjust the flattening height, and in the embodiment, the flattening lifting mechanism 51 adopts a ball screw transmission mechanism and specifically comprises a bottom plate, a motor, a coupler, a guide rail sliding block, a ball screw, a support and the like.
The control system controls the flattening degree, namely the flattening height, of the material flattening mechanism 5 according to the thickness of the material after being gathered, measured by the central laser radar 2, on one hand, the thickness of the material is further adjusted, more importantly, the upper surface of the material is flattened, and the lower surface of the material is flattened by virtue of a conveying belt, so that the whole flatness of the material can be ensured under the combined action of the two materials, and the detection is convenient.
The microwave moisture detection device 6 comprises a detection main body 63, a pair of microwave transmitting antennas 61 and a movement mechanism 62, wherein the detection main body 63 is respectively connected with the pair of microwave transmitting antennas 61, the pair of microwave transmitting antennas 61 are oppositely arranged above and below a material, the movement mechanism is used for driving the pair of microwave transmitting antennas 61 to be close to or far away from each other, the movement mechanism comprises a detection screw rod transmission mechanism which moves reversely and symmetrically, the structural principle of the movement mechanism is the same as that of a material gathering mechanism, and the movement mechanism comprises a bottom plate, a motor, a coupler, a guide rail sliding block, nut screws with reversely symmetrical two ends, a support and the like, and the pair of microwave transmitting antennas are respectively fixedly connected with two nuts which move reversely of the detection screw rod transmission mechanism.
The control system controls the detection distance between the microwave moisture detection device and the material according to the thickness of the flattened material detected by the rear laser radar 3.
The working flow is as follows:
based on related parameters of the space transmission microwave sensor, designing a material thickness threshold and detecting surface flatness requirements, and judging whether the material thickness distribution state meets the requirements or not;
when the material thickness distribution does not meet the related requirements, based on the material thickness distribution information detected by the front laser radar 1, the control system calculates the height of the material gathering mechanism and the size of the bell mouth, and controls the motor movement of the material gathering mechanism to adjust.
When the flatness of the material surface does not meet the related requirements, the control system calculates the height of the flattening mechanism and controls the motor to move based on the thickness distribution information of the material detected by the middle-set laser radar.
And detecting the thickness distribution state of the folded and flattened material by a rear laser radar, calculating the height between the microwave transmitting antenna and the conveying belt, and controlling the movement of the microwave transmitting antenna.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical scheme of the present utility model and are not limiting; while the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present utility model or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the utility model, it is intended to cover the scope of the utility model as claimed.
Claims (8)
1. A tobacco material moisture content on-line measuring system based on space transmission microwave method, its characterized in that: the system comprises a front laser radar, a middle laser radar, a rear laser radar, a material gathering mechanism, a material flattening mechanism, a microwave moisture detection device and a control system;
the material gathering mechanism, the material flattening mechanism and the microwave moisture detection device are sequentially arranged along the material conveying direction;
the front laser radar is arranged in front of the material gathering mechanism and is used for detecting the initial thickness of the material and sending the initial thickness to the control system;
the middle-arranged laser radar is arranged behind the material gathering mechanism and in front of the material flattening mechanism, and is used for detecting the thickness of the material flowing through the middle after gathering and before flattening and sending the material flowing through the middle thickness to the control system;
the rear laser radar is arranged behind the material flattening mechanism, is used for detecting the actual thickness of flattened materials and is sent to the control system;
the control system adjusts the furling degree of the material furling mechanism according to the initial thickness of the material; the control system controls the flattening degree of the material flattening mechanism according to the thickness of the material after being gathered; the control system controls the detection distance between the microwave moisture detection device and the material according to the thickness of the flattened material.
2. The tobacco material moisture content online detection system based on the space transmission microwave method according to claim 1, wherein the system is characterized in that: the microwave moisture detection device comprises a detection main body, a pair of microwave transmitting antennas and a movement mechanism, wherein the detection main body is respectively connected with the pair of microwave transmitting antennas, the pair of microwave transmitting antennas are oppositely arranged above and below a material, and the movement mechanism is used for driving the pair of microwave transmitting antennas to be close to or far away from each other.
3. The tobacco material moisture content online detection system based on the space transmission microwave method according to claim 2, wherein the system is characterized in that: the motion mechanism comprises a detection screw rod transmission mechanism which moves reversely and symmetrically, and a pair of microwave transmitting antennas are respectively fixedly connected with two nuts which move reversely of the detection screw rod transmission mechanism.
4. A tobacco material moisture content online detection system based on a space transmission microwave method according to any one of claims 1-3, wherein: the material gathering mechanism comprises a pair of gathering panels and a gathering screw rod transmission mechanism which moves reversely and symmetrically, and the pair of gathering panels are respectively fixedly connected with two nuts which move reversely of the gathering screw rod transmission mechanism.
5. The online detection system for moisture content of tobacco materials based on a space transmission microwave method as claimed in claim 4, wherein the online detection system is characterized in that: the pair of folding panels are arranged in a horn mouth shape, and the opening direction of the horn mouth is opposite to the material moving direction.
6. The online detection system for moisture content of tobacco materials based on a space transmission microwave method as claimed in claim 5, wherein the system is characterized in that: the material folding mechanism further comprises a folding height adjusting mechanism, and the folding height adjusting mechanism and the folding screw rod transmission mechanism form a two-stage motion platform.
7. The online detection system for the moisture content of tobacco materials based on the space transmission microwave method according to claim 6, wherein the online detection system is characterized in that: the material flattening mechanism comprises a flattening lifting mechanism and a flattening panel, the bottom surface of the flattening panel is a pushing plane, the pushing plane is obliquely arranged from the front upper part to the rear lower part, and the flattening lifting mechanism drives the flattening panel to adjust the flattening height.
8. The online detection system for moisture content of tobacco materials based on a space transmission microwave method as claimed in claim 7, wherein the system comprises: the moving parts of the material gathering mechanism and the microwave moisture detection device are both screw rod transmission mechanisms; the moving parts of the folding height adjusting mechanism and the material flattening mechanism are both ball screw mechanisms.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321997484.2U CN220438203U (en) | 2023-07-27 | 2023-07-27 | Tobacco material moisture content online detection system based on space transmission microwave method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321997484.2U CN220438203U (en) | 2023-07-27 | 2023-07-27 | Tobacco material moisture content online detection system based on space transmission microwave method |
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| CN220438203U true CN220438203U (en) | 2024-02-02 |
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| CN202321997484.2U Active CN220438203U (en) | 2023-07-27 | 2023-07-27 | Tobacco material moisture content online detection system based on space transmission microwave method |
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- 2023-07-27 CN CN202321997484.2U patent/CN220438203U/en active Active
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