CN204555922U - Online circumference detecting device - Google Patents

Abstract

The utility model discloses an online circumference detector. The online circumference detector comprises a positioning device, a casing, a mounting plate, a guiding device and a detection channel. The opposite sides of the casing are respectively provided with a mounting plate and a guiding device inlaid on the casing. ;The positioning device is embedded on the mounting plate; the detection channel runs through the mounting plate, the shell and the guide device; the positioning device, the mounting plate, the shell and the guide device together form an annular cavity; there is a laser path between the positioning device and the guide device, and the laser path The annular cavity is connected; a laser and an image sensor are arranged in the annular cavity, and the laser and the image sensor are located at both ends of the laser path, and the axis of the laser path is perpendicular to and intersects with the axis of the detection channel; a component plate is arranged on the mounting plate, and the laser and image sensor are fixed on the component board. The online circumference detector disclosed by the utility model solves the problem that the detection accuracy is affected by the complex structure of the detection equipment.

Description

Online circumference detector

technical field

The utility model relates to the technical field of instrument measurement, in particular to an online circumference detector.

Background technique

The current bar circumference detection methods are generally divided into two methods: offline detection and online detection. The off-line detection method means that after the rod-shaped finished product (such as cigarettes) is produced on the production line, the circumference (including the circumference length and roundness) of the rod-shaped finished product is detected by the testing equipment alone; however, the offline detection method cannot be detected in time when the rod-shaped finished product has problems Feedback to the operator, resulting in failure to deal with problems in the rod-shaped finished product in time, resulting in quality accidents. Therefore, the online detection method is usually adopted in the prior art.

The on-line detection method is to set up detection equipment on the production line, and conduct circumferential detection on each rod-shaped finished product produced on the production line. The online detection method usually used is the laser detection method. The laser detection method is to install laser detection equipment on the production line, and detect the circumference of the rod-shaped finished product through the laser detection signal sent by the laser detection equipment.

However, the laser detection equipment of the laser detection method is relatively complicated in structure and is not easy to install. After a long period of use, the parts of the laser detection equipment may become loose. Since the laser is more sensitive, when the position of the laser detection equipment changes , it will affect the detection accuracy of the bar circumference.

Utility model content

The purpose of the utility model is to provide an online circumference detector to solve the problem that the detection accuracy is affected by the complex structure of the detection equipment mentioned in the background art.

In order to solve the above technical problems, the utility model provides the following technical solutions:

An online circumference detector, characterized in that the online circumference detector includes a positioning device, a housing, a mounting plate, a guide device and a detection channel, wherein,

The mounting plate and the guiding device inlaid on the housing are respectively provided on opposite sides of the housing, and the mounting plate is not connected to the guiding device;

A positioning device is inlaid on the mounting plate, and the positioning device corresponds to the guiding device;

The detection channel runs through the positioning device, the mounting plate, the housing and the guide device;

The positioning device, the mounting plate, the housing and the guiding device jointly form an annular cavity;

There is a laser path between the positioning device and the guiding device, and the laser path communicates with the annular cavity;

A laser and an image sensor are arranged in the annular cavity, the laser and the image sensor are located at both ends of the laser path, and the axis of the laser path is perpendicular to and intersects the axis of the detection channel;

An element board is arranged on the installation board, and the laser and the image sensor are both fixed on the element board.

Preferably, in the above-mentioned online circumference detector, there are three sets of the lasers and the image sensors, and the three sets of the lasers and the image sensors are all installed on the element board.

Preferably, in the above-mentioned wire circumference detector, a ventilation device is provided on the casing, and the ventilation device communicates with the annular cavity.

Preferably, in the above-mentioned online circumference detector, the ventilation device is an L-shaped gas joint, and the L-shaped gas joint communicates with the annular cavity.

Preferably, in the above-mentioned line circumference detector, the laser is a semiconductor laser, and the semiconductor laser is arranged on the element board.

Preferably, in the above-mentioned line circumference detector, the image sensor is a CCD sensor, and the CCD sensor is arranged on the element board.

Preferably, in the above-mentioned wire circumference detector, a seal is provided between the guide device and the housing.

Preferably, in the above-mentioned line circumference detector, a gasket is provided between the mounting plate and the element plate.

The embodiment of the utility model provides an online circumference detector, the opposite sides of the casing of the online circumference detector are respectively provided with the installation plate and the guide device embedded in the casing, and the The mounting plate is not connected to the guiding device; the positioning device is inlaid on the mounting plate, and the positioning device corresponds to the guiding device; the guiding device, the housing, the mounting plate and the positioning device A closed annular cavity is formed together, an element board is arranged on the mounting board, and a laser and an image sensor are arranged on the element board. When the rod-shaped finished product enters the detection channel, the laser emits a laser beam, and the laser beam passes through the laser channel to irradiate the beam on the rod-shaped finished product, and the rod-shaped finished product will block the laser beam irradiated on the rod-shaped finished product, and then the image sensor will receive the above-mentioned The laser beam blocked by the rod-shaped product forms an image with the shadow of the rod-shaped product, and finally the image sensor uploads the above image to the computer, and the computer calculates the circumference and roundness of the rod-shaped product. Since both the laser and the image sensor are fixed on the component board, and the component board is connected to the mounting board, as long as the positions of the component board and the mounting board do not change, the The position of the laser and the image sensor will not change, and then the position of the laser beam emitted by the laser will not change, so that the accuracy of the circumference of the rod-shaped finished product will not be affected, and finally solve the problem of the detection equipment described in the background technology. The problem that the structure is complex and affects the detection accuracy.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, no creative work Other drawings can also be obtained based on these drawings.

Fig. 1 is the perspective view of the online circumference detector that the utility model embodiment provides;

Fig. 2 is the sectional view of the A-A direction of the online circumference detector provided by the embodiment of the present invention;

Fig. 3 is a schematic diagram of the laser detection of the online circumference detector provided by the embodiment of the present invention.

Graphical description:

1-positioning device, 2-mounting plate, 3-gasket, 4-element plate, 5-housing, 6-laser, 7-image sensor, 8-seal, 9-guiding device, 10-connecting device, 11- Ventilation device, 12-detection channel, 13-laser channel, 14-rod-shaped finished product, 15-laser beam.

Detailed ways

The purpose of this utility model is to provide an online circumference detector to solve the problem of affecting the detection accuracy due to the complex structure of the detection equipment described in the background art.

In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the utility model, and to make the above-mentioned purposes, features and advantages of the embodiments of the utility model more obvious and easy to understand, the following describes the embodiments of the utility model in conjunction with the accompanying drawings The technical scheme in is described in further detail.

Please refer to accompanying drawings 1 and 2 , the online circumference detector provided by the embodiment of the present invention includes a positioning device 1 , a housing 5 , a mounting plate 2 , a guiding device 9 and a detection channel 12 .

The positioning device 1 is embedded on the mounting plate 2, and the positioning device 1 can make the rod-shaped finished product 14 (such as a cigarette) smoothly enter the online circumference detector at a certain position.

The casing 5 is an external protection component of the online circumference detector, and protects various internal components of the online circumference detector.

The mounting plate 2 is connected to one side of the housing 5 through screws, and plays a role of fixing the installation of the housing 5 .

The guide device 9 is inlaid on the other side of the housing 5 corresponding to the mounting plate 2, the guide device 9 and the mounting plate 2 are not connected and a certain gap is left, and the positions of the guide device 9 and the positioning device 1 are corresponding, The guide device 9 is used to guide the rod-shaped finished product 14 out of the online circumference detector provided by the embodiment of the utility model.

The detection channel 12 runs through the positioning device 1, the mounting plate 2, the housing 5 and the guide device 9, and the detection channel 12 provides a channel for the detection of the rod-shaped finished product 14 in the online circumference detector provided by the embodiment of the present invention.

The above-mentioned positioning device 1 , the above-mentioned mounting plate 2 , the above-mentioned housing 5 and the above-mentioned guiding device 9 jointly form an annular cavity. The mounting plate 2 is provided with a component plate 4, and the laser 6 and the image sensor 7 located inside the annular cavity are all fixed on the component plate 4, between the positioning device 1 and the guide device 9 There is one for the laser beam emitted by the laser 6 to pass through. The laser 6 and the image sensor 7 are respectively located on two sides of the detection channel 12 , and the axis of the laser path 13 and the axis of the detection channel 12 are perpendicular and intersect. Since the laser 6 and the image sensor 7 are all arranged on the element board 4, and the element board 4 is fixed on the mounting board 2, as long as the mounting board 2 and the element board If there is no relative movement, the positions of the laser 6 and the image sensor 7 will not change, and the image received by the image sensor 7 with the shadow of the rod-shaped finished product 14 will not be deformed, thus Improve the accuracy of the circumference detection of the rod-shaped finished product 14 .

Please refer to accompanying drawing 2 and accompanying drawing 3, the working process of the on-line circumference detector that the utility model embodiment provides is as follows: the air supply device sends wind into the annular cavity through the ventilation device 11, and the wind passes through the annular cavity and the circular cavity. The connected laser path 13 enters the detection channel 12 and is finally discharged through the detection channel 12 . The rod-shaped finished product 14 produced on the production line accurately enters the detection passage 12 through the positioning device 1, and the wind sent to the detection passage 12 lifts the rod-shaped finished product 14, and the rod-shaped finished product 14 and the inner wall of the detection passage 12 have no contact with each other. touch. When the rod-shaped finished product 14 is sent into the detection channel 12, the laser 6 and the image sensor 7 are turned on, the laser 6 emits a laser beam 15, and the laser beam 15 enters the detection channel 12 through the laser passage 13 The range of the laser beam 15 that passes through the laser path 13 will cover the range of the detection channel 12 that the laser path 13 contacts and communicates with, and the laser beam 15 is irradiated on the circumferential surface of the rod-shaped finished product 14, so that the The image sensor 7 can receive an image with the shadow of the rod-shaped finished product 14 . The image sensor 7 uploads the received image to the computer, and the computer calculates the diameter of the rod-shaped finished product 14 according to the shadow width in the image, and calculates the circumference length from the diameter. The aforementioned circumference length is displayed by an embedded display interface of the online circumference detector.

Preferably, there are three groups of the lasers 6 and the image sensors 7, and the three groups of the lasers 6 and the image sensors 7 are installed on different positions of the element board 4, and the three groups of the lasers 6 and the image sensors 7 The image sensor 7 can measure projection images of three different positions on the same cross section of the rod-shaped finished product 14, and the computer calculates three different diameters of the rod-shaped finished product 14 according to the projection widths in the above three different projected images, and by The diameter calculates the circumference length. The computer will also compare and calculate the maximum diameter difference based on the above three different diameters of the rod-shaped finished product 14 , and then obtain the roundness value of the rod-shaped finished product 14 .

Preferably, the above-mentioned laser 6 is a semiconductor laser, which is small in size and light in weight, and can be better fixed on the element board 4 . At the same time, semiconductor lasers consume less power and have high efficiency, and can adapt to long-term and continuous production lines.

Preferably, the above-mentioned image sensor 7 adopts a CCD sensor (i.e. Charge Coupled Device, charge-coupled device image sensor). The special process of the CCD sensor can ensure that the data will not be distorted during transmission, thus ensuring that the data of the circumference length calculated by the computer will not have errors and ensure the accuracy of the data.

When the rod-shaped finished product 14 produced is a cigarette, the detection accuracy of the cigarette is extremely strict. If there is dust in the detection channel 12 or the latex carried on the tobacco-shaped tobacco rod accumulates at the detection port, the image sensor 7 will The width of the shadow portion in the received image deviates from the actual cigarette diameter. In order to eliminate the above deviation, the embodiment of the utility model provides a ventilation device 11 on the casing 5 of the online circumference detector. The device 11 communicates with the annular cavity, so that the outside wind enters the detection channel 12 through the ventilation device 11 and is finally discharged into the air from the guide device 9 . The wind entering the detection channel 12 can hold up the cigarettes without contacting the inner wall of the detection channel 12, and can also blow away the dust in the detection channel 12 to achieve the purpose of automatic dust removal. Preferably, the ventilation device 11 adopts an L-shaped air joint, and the unique bend of the L-shaped air joint can change the connection direction of the external equipment to save installation space.

After the online circumference detector provided by the embodiment of the utility model has been used for a long time, dust may enter the connection between the housing 5 and the guide device 9, and then the dust will enter the annular cavity, and the annular cavity The laser 6 and the image sensor 7 will affect the detection accuracy of the rod-shaped finished product 14 due to the entry of dust. For this reason, the online circumference detector provided by the embodiment of the utility model is provided with a seal 8 between the casing 5 and the guide 9, and the seal 8 can prevent foreign dust or water and other impurities from entering the annular space. inside of the cavity.

The online circumference detector provided by the embodiment of the utility model is provided with a gasket 3 between the mounting plate 2 and the element plate 4 . In the industrial production process, due to the change of the external environment temperature or the continuous operation of the equipment for a long time, the temperature of the online circumference detector will also change, so that the mounting plate 2 and the element plate 4 will be relatively deformed, The positions of the laser 6 and the image sensor 7 will change, thereby affecting the detection accuracy of the online circumference detector. The gasket 3 can prevent the mounting plate 2 and the element plate 4 from moving relative to each other when the external temperature changes, and ultimately ensure the detection accuracy of the online circumference detector.

Table 1 below shows the circumference length data of cigarette detection by the offline detection method and the online detection method provided by the embodiment of the present invention, and the unit of the circumference length is mm.

Table 1: Circumferential lengths for cigarette testing.

First group Second Group The third group off-line assay 24.128 24.175 24.135 On-line detection method 24.125 24.179 24.130

It can be seen that the data detected by the online circumference detector provided by the embodiment of the utility model is the same as that detected by the off-line detection method by comparing the circumference length data obtained by the online detection method provided by the offline detection method and the embodiment of the utility model to the cigarette detection. The difference of the obtained data is between 0.005mm, and the standard of the circumference length of the cigarette is 24.2±0.18mm, which shows that the online circumference detector provided by the embodiment of the utility model has very high detection accuracy.

Although the utility model has been described in the form of specific embodiments, for those skilled in the art, the utility model can be implemented without departing from the spirit and scope of the utility model defined by the appended claims. Various changes and modifications are also included within the scope of the present invention.

Claims (8)

1. an online circumference detecting device, it is characterized in that, described online circumference detecting device comprises locating device (1), shell (5), installing plate (2), guide piece (9) and sense channel (12), wherein

The upper relative both sides of described shell (5) arrange described installing plate (2) respectively and are embedded in the described guide piece (9) on described shell (5), and described installing plate (2) is not connected with described guide piece (9);

Described installing plate (2) is inlayed locating device (1), and described locating device (1) corresponds to described guide piece (9);

Described sense channel (12) runs through described locating device (1), installing plate (2), described shell (5) and described guide piece (9);

Described locating device (1), described installing plate (2), described shell (5) and described guide piece (9) form toroidal cavity jointly;

Be provided with laser via (13) between described locating device (1) and described guide piece (9), and described laser via (13) is communicated with described toroidal cavity;

Laser instrument (6) and imageing sensor (7) is provided with in described toroidal cavity, described laser instrument (6) and described imageing sensor (7) are positioned at the two ends of described laser via (13), and the axes normal of the axis of described laser via (13) and described sense channel (12) and crossing;

Described installing plate (2) is provided with element board (4), described laser instrument (6) and described imageing sensor (7) are all fixed on described element board (4).

2. online circumference detecting device according to claim 1, it is characterized in that, described laser instrument (6) and described imageing sensor (7) have three groups, and laser instrument (6) described in three groups and described imageing sensor (7) are installed on described element board (4).

3. online circumference detecting device according to claim 1, is characterized in that, described shell (5) is provided with air-breather (11), and described air-breather (11) is connected with described toroidal cavity.

4. online circumference detecting device according to claim 3, is characterized in that, described air-breather (11) is L-type gas joint, and described L-type gas joint is connected with described toroidal cavity.

5. online circumference detecting device according to claim 1 and 2, is characterized in that, described laser instrument (6) is semiconductor laser, and described semiconductor laser is arranged on described element board (4).

6. online circumference detecting device according to claim 1 and 2, is characterized in that, described imageing sensor (7) is ccd sensor, and described ccd sensor is arranged on described element board (4).

7. online circumference detecting device according to claim 1, is characterized in that, is provided with seal (8) between described guide piece (9) and described shell (5).

8. online circumference detecting device according to claim 1, is characterized in that, is provided with pad (3) between described installing plate (2) and described element board (4).