Probe and gram weight detection equipment

Abstract

The utility model discloses a probe and gram weight detection equipment. The probe comprises a probe shell, a ray unit and a calibration assembly, and the ray unit and the calibration assembly are fixed in the probe shell; a calibration space is arranged between the ray unit and the inner wall of the probe shell corresponding to the ray emitting direction of the ray unit; the calibration assembly comprises a driving unit and a fan-shaped calibration plate, the driving unit is fixed in the probe shell and connected with the fan-shaped calibration plate, the fan-shaped calibration plate is rotationally arranged in the calibration space through the driving unit, at least one calibration hole is formed in the end, away from the end connected with the driving unit, of the fan-shaped calibration plate, and at least one calibration hole is provided with a calibration piece; at least one of the calibration holes has a corresponding rotation angle range and is at least partially overlapped with a ray path of the ray unit in the corresponding rotation angle range. The defects of time consumption, inconvenience, unreasonability, unscientificity and the like of mounting and dismounting an external calibration device when gram weight detection equipment needs to be calibrated irregularly each time can be overcome.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of gram weight detection, and specifically relates to a probe and gram weight detection equipment BACKGROUND

[0002] In the production link of sheet material products such as paper, non-woven fabric and copper foil, gram weight detection equipment plays a key role, which can accurately detect the gram weight of sheet material and realize feedback control. The gram weight detection equipment mainly uses X-rays or beta rays to penetrate the sheet material, and calculates the gram weight by comparing the values before and after the ray penetration. However, due to the inevitability of ray attenuation and the aging of sensor performance over time, the gram weight detection equipment needs to be calibrated regularly in the actual production process.

[0003] The common calibration method is to calibrate the gram weight for each specification product produced. The specific operation is as follows: each time the calibration is carried out, the production line needs to produce products of each gram weight specification, and the gram weight detection equipment measures these different specification products to obtain the gram weight measurement value. Then, the gram weight specification products are cut and sampled, and weighed to obtain the true value of the gram weight. By comparing and analyzing the correlation between the gram weight measurement value and the true value, the calibration of the gram weight detection equipment is completed.

[0004] Another conventional calibration method is to add a special calibration device outside the ray emission probe of the gram weight detection equipment. The calibration device contains standard sample sheets simulating different specification products, which are used to replace the actual products to calibrate the gram weight detection equipment, which improves the efficiency of the calibration work to some extent. For example, patent CN113031042A discloses a kind of ray calibration equipment and method, and the equipment includes: movement platform and two calibration components installed on the movement platform. Each calibration component has a plurality of calibration samples. When the ray calibration equipment calibrates the radiation energy in multiple directions of the calibration radiation source, the movement platform can translate and / or rotate the at least one calibration component to allow the combination of multiple calibration samples to be directly opposite the radiation in each direction.

[0005] However, the above two conventional calibration methods still have the following problems:

[0006] In the first conventional calibration method, since each specification product needs to go through the process of production, sampling and calibration, the sampled products are destroyed and cannot be used continuously, resulting in a large amount of material waste. Moreover, the whole production, sampling and calibration process not only consumes time, but also consumes a large amount of manpower, resulting in high cost and low efficiency.

[0007] In the second conventional calibration mode, the calibration device is additionally installed outside the ray emitting probe. The installation and dismounting of the calibration device are required in the calibration of each gram weight detection equipment, which undoubtedly increases the labor amount. In addition, during the installation or dismounting of the calibration device, the production line equipment has to be stopped for safety, which conflicts with the requirement of the gram weight detection equipment to be calibrated regularly. Either the calibration cannot be performed or the production line is forced to stop, which not only may damage the production line equipment, but also is not conducive to the effective control of product quality and affects the overall production of the production line. Practical new type content

[0008] In view of the defects in the prior art, the present utility model provides a probe and a gram weight detection equipment. The time-consuming, inconvenience, irrationality and unscientific defects in the installation and dismounting of the external calibration device during the periodic calibration of the gram weight detection equipment can be solved.

[0009] In the first aspect, the present utility model provides a probe of a gram weight detection equipment, which comprises a probe shell, a ray unit and a calibration assembly, the ray unit and the calibration assembly being fixed in the probe shell;

[0010] The ray unit and the inner wall of the probe shell corresponding to the direction of the ray emitted by the ray unit are provided with a calibration space;

[0011] The calibration assembly comprises a driving unit and a sector-shaped calibration plate, the driving unit being fixed in the probe shell and connected to the sector-shaped calibration plate, the sector-shaped calibration plate being rotatably arranged in the calibration space through the driving unit, at least one calibration hole being provided at the end of the sector-shaped calibration plate away from the driving unit, and at least one of the calibration holes being provided with a calibration sheet;

[0012] At least one of the calibration holes has a corresponding rotation angle range, and at least partially overlaps with the ray path of the ray unit within the corresponding rotation angle range.

[0013] Further, the calibration assembly further comprises a detection unit and a driving positioning unit signal connected to the detection unit, the detection unit being fixed to the probe shell, the detection unit completing the position detection of the sector-shaped calibration plate and reaching the maximum rotation angle of the sector-shaped calibration plate when the detection unit partially overlaps with the sector-shaped calibration plate, and the driving positioning unit being fixedly connected to the driving unit and positioning the angle of the sector-shaped calibration plate rotated by the driving unit.

[0014] Further, the detection unit is an optical sensor, and the driving positioning unit is an encoder.

[0015] Further, the driving unit and the ray unit are arranged in parallel along the movement direction of the probe.

[0016] Further, the driving unit and the ray unit are arranged in parallel along the movement direction of the probe.

[0017] Further, distances from all the calibration holes to the connection position of the driving unit on the fan-shaped calibration plate are equal; all the calibration holes are uniformly arranged on the fan-shaped calibration plate.

[0018] Further, the ray emitted by the ray unit is X-ray or beta ray.

[0019] Further, the material of the calibration sheet is PET, stainless steel sheet or aluminum foil.

[0020] Further, the fan-shaped calibration plate is provided with at least two calibration holes, and one of the calibration holes is not provided with a calibration sheet.

[0021] Further, the fan-shaped calibration plate is provided with at least three calibration holes, one of the calibration holes is not provided with a calibration sheet, and the plurality of calibration sheets have different grammage specifications.

[0022] In the second aspect, the utility model also provides a grammage detection equipment, including at least one above-mentioned probe.

[0023] The probe and the grammage detection equipment have at least the following beneficial effects:

[0024] (1) By arranging the calibration assembly in the probe, the time-consuming, inconvenience, irrationality, unscientificity and other defects of installing and dismounting the external calibration device during irregular calibration of each grammage detection equipment can be solved.

[0025] (2) By limiting the position of the calibration assembly, the driving unit and the ray unit are arranged in parallel along the movement direction of the probe, so that the probe size of the same type of grammage detection equipment is more compact and smaller, more space can be left for increasing the product detection width, so that the grammage detection equipment has the advantages of smaller floor area and more economical cost.

[0026] (3) By directly connecting the fan-shaped calibration plate and the driving unit, the structure of the calibration assembly is more simplified, the transmission link is less, and the number of parts assembly is less, which is beneficial to improve the reliability of the product, reduce the failure probability, and thus meet the higher requirements of the service life of the product.

[0027] (4) By setting the fan-shaped calibration plate, and the calibration assembly and the ray unit are arranged side by side along the probe movement direction, the size of the probe shell in the probe movement direction can be reduced, and the detection width can meet the predetermined requirements. BRIEF DESCRIPTION OF DRAWINGS

[0028] Fig. 1 A schematic view of a probe of a gram weight detection equipment provided by the present application is shown in the figure.

[0029] Fig. 2 A structure schematic view of the inside of the probe provided by an embodiment of the present application is shown in the figure.

[0030] Fig. 3 A structure schematic view of the calibration assembly provided by an embodiment of the present application is shown in the figure.

[0031] Explanation of reference signs: 11-calibration assembly, 111-driving unit, 112-driving positioning unit, 113-motor mounting plate, 114-detection unit, 115-fan-shaped calibration plate, 1151-calibration hole, 12-ray unit, 21-lower bottom plate, 2-probe shell. DETAILED DESCRIPTION

[0032] In order to better understand the above technical solutions, the above technical solutions will be described in detail in combination with the drawings of the specification and specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0033] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates otherwise. "Multiple" generally includes at least two.

[0034] It should also be noted that the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the goods or devices including a series of elements not only include those elements, but also include other elements not explicitly listed, or include elements inherent to such goods or devices. Without more limitation, the element defined by the sentence "including a" does not exclude the presence of other identical elements in the goods or devices including the element.

[0035] As Figs. 1 to 3As shown, the utility model provides a kind of probe of grammage detection equipment, can include probe shell 2, ray unit 12 and calibration assembly 11, ray unit 12 and calibration assembly 11 are fixed in probe shell 2;

[0036] Ray unit 12 and the inner wall of probe shell 2 corresponding to the direction of the ray it emits are provided with calibration space;Wherein, the ray emitted by ray unit 12 can be X-ray or beta ray, Fig. 2 The device showing beta ray;Ray unit 12 includes ray tube and its accessory device;Calibration space is the area between ray unit 12 and lower bottom plate 21, such as Fig. 2 And Fig. 3 As shown;

[0037] Calibration assembly 11 includes drive unit 111 and sector calibration plate 115, drive unit 111 is fixed in probe shell 2 and is connected sector calibration plate 115, sector calibration plate 115 is rotated in calibration space by drive unit 111, sector calibration plate 115 is provided with at least one calibration hole 1151 away from one end connected with drive unit 111, at least one of calibration hole 1151 is provided with calibration piece;Wherein, calibration piece is the reference piece when calibration, and its material is PET, stainless steel sheet or aluminum foil;

[0038] The rotation range of sector calibration plate 115 in calibration space, at least one of calibration hole 1151 has corresponding rotation angle range, and at least partially overlaps with the ray path of ray unit 12 in corresponding rotation angle range. Wherein, when there are multiple calibration holes 1151 with respective corresponding rotation angle range, multiple rotation angle ranges do not overlap;In addition, the rotation angle range of multiple calibration holes 1151 is determined with sector calibration plate 115 in a certain preset position as the rotation starting point, for example, the rotation starting point can be the position of sector calibration plate 115 when located at the boundary of calibration space. The ray path of ray unit 12 is the path formed after ray unit 12 emits ray according to the direction of ray.

[0039] Wherein, the shape of sector calibration plate 115 is not specifically limited, and it is a plate member with one end width greater than the other end width, which can be a sector structure formed by solid plate member, or a sector structure formed by hollow plate member, and the sector structure is formed diverging in the direction away from drive unit 111 along its fixed position with drive unit 111. In addition, sector calibration plate 115 can also be a T-shaped sector structure formed by the intersection of two straight plates or the intersection of straight plate and arc plate.

[0040] The probe shell 2 can include a lower bottom plate 21 and a probe cover which is fixed with the lower bottom plate 21 to form an internal space of the probe shell 2. The ray unit 12 and the calibration assembly 11 are fixed in the probe shell 2 (i.e. in the internal space) and on the lower bottom plate 21. The probe cover is fixed with the mounting plate, the moving frame and other structures of the grammage detection device to realize the movement of the probe and the grammage detection through the ray unit 12. In addition, a through hole is arranged on the lower bottom plate 21, which is matched with the ray center of the ray unit 12, i.e. the rays emitted by the ray unit 12 can pass through the through hole on the lower bottom plate 21 and act on the paper, non-woven fabric, copper foil and other products, and finally realize the grammage detection of the corresponding products.

[0041] In order to meet the regular calibration of the grammage detection device in the actual production process, the calibration assembly 11 can further include a detection unit 114 and a driving positioning unit 112 connected with the detection unit 114, the detection unit 114 is fixed with the probe shell 2, the detection unit 114 detects the position of the sector calibration plate 115 when the detection unit 114 partially overlaps with the sector calibration plate 115, and the maximum rotation angle of the sector calibration plate 115 is reached, the driving positioning unit 112 is fixedly connected with the driving unit 111 and positions the angle of the driving unit 111 driving the sector calibration plate 115 to rotate. The detection unit 114 is an optical sensor, and the driving positioning unit 112 is an encoder. When the detection unit 114 partially overlaps with the sector calibration plate 115 (i.e. the detection unit 114 detects the sector calibration plate 115), the sector calibration plate 115 reaches the maximum rotation angle, at this time, the current rotation position of the motor is the zero rotation position, and the angle positioning of the driving unit 111 by the driving positioning unit 112 can ensure that the position of the calibration hole 1151 is clear when the driving unit 111 drives the sector calibration plate 115 to rotate different angles, and can also ensure that the calibration pieces on the sector calibration plate 115 all pass through the rays emitted by the ray unit 12, thereby improving the calibration effect of the ray unit 12.

[0042] In order to reduce the size of the probe after the calibration assembly 11 is arranged in the probe, and to ensure that the probe has a larger detection width, the driving unit 111 and the ray unit 12 can be arranged in parallel along the movement direction of the probe on the basis of the fan-shaped calibration plate. In an actual application scenario, the calibration assembly 11 and the ray unit 12 can be arranged in parallel, the geometric center of the calibration assembly 11 and the geometric center of the ray unit 12 are connected in parallel to the movement direction of the probe; wherein the geometric center of the calibration assembly 11 can be determined when the fan-shaped calibration plate 115 is rotated to a certain angle, so that the projection width of the fan-shaped calibration plate 115 in the movement direction of the probe is maximum; or the geometric center of the calibration assembly 11 can be determined when the fan-shaped calibration plate 115 is in the initial position or is rotated to the maximum angle. In addition, the width of the calibration assembly 11 is not greater than the width of the ray unit 12, that is, during the process that the fan-shaped calibration plate 115 of the calibration assembly 11 is rotated from the initial position to the maximum angle, the calibration assembly 11 is located within the width range of the ray unit 12 along the vertical direction of the movement of the probe, and the specific meaning is that the left boundary and the right boundary of the ray unit 12 in the vertical direction of the movement of the probe form a left boundary surface and a right boundary surface perpendicular to the movement direction of the probe, and the calibration assembly 11 is located in the region between the left boundary surface and the right boundary surface; correspondingly, the width of the calibration assembly 11 and the width of the ray unit 12 are both the shortest distance between the left boundary and the right boundary of itself along the vertical direction of the movement of the probe, that is, the distance between the left boundary surface and the right boundary surface. Through the above arrangement, it can be ensured that the calibration assembly 11 arranged in the probe shell 2 does not occupy additional space, thereby ensuring that the probe has a proper size.

[0043] Further, the driving unit 111 and the ray unit 12 are arranged side by side along the movement direction of the probe, that is, the driving unit 111 and the ray unit 12 are closely arranged in the movement direction of the probe. During the rotation period of the fan-shaped calibration plate 115, since the calibration holes 1151 thereon need to pass through the rays emitted by the ray unit 12 in turn, the closer the driving unit 111 is to the ray unit 12, the smaller the size of the calibration assembly 11 occupies in the movement direction of the probe, thereby making the probe have a larger detection range, that is, further improving the detection width. Wherein the driving unit 111 is a motor, which is fixed to the lower bottom plate 21 through a motor mounting plate 113; wherein the cross section of the motor mounting plate 113 is Z-shaped, and when the fan-shaped calibration plate 115 is fixed with the driving shaft of the driving unit 111, the projection of the fan-shaped calibration plate 115 along the driving shaft of the driving unit 111 partially overlaps the motor mounting plate 113.

[0044] The fan-shaped calibration plate 115 is provided with at least two calibration holes 1151, one of which is not provided with a calibration sheet. More specifically, the fan-shaped calibration plate is provided with at least three calibration holes, one of which is not provided with a calibration sheet. By arranging calibration sheets in at least two calibration holes 1151, multiple calibration comparisons can be achieved in a single rotation period of the fan-shaped calibration plate 115, thereby improving calibration accuracy. Further, the calibration sheets in each calibration hole 1151 have different grammage specifications. Among them, the calibration hole 1151 not provided with a calibration sheet matches the position of the ray unit 12 when the probe detects the grammage of the product, that is, the rays emitted by the ray unit 12 pass through the calibration hole 1151 not provided with a calibration sheet to detect the grammage of the product. In addition, the distances from the multiple calibration holes 1151 on the fan-shaped calibration plate 115 to the driving shaft of the driving unit 111 are equal. At the same time, the distances between adjacent calibration holes 1151 on the fan-shaped calibration plate 115 are equal, thereby ensuring that the driving unit 111 and the driving positioning unit 112 cooperate to rotate by a predetermined angle to achieve calibration switching of adjacent calibration holes 1151 to the ray unit 12, which can further improve calibration accuracy. In addition, the distances from all calibration holes 1151 to the connection position of the fan-shaped calibration plate 115 and the driving unit 111 are equal, which can ensure that all calibration holes 1151 pass through the rays emitted by the ray unit 12 as much as possible; all calibration holes 1151 are uniformly arranged on the fan-shaped calibration plate 115, which can enable the driving unit 111 to drive the fan-shaped calibration plate 115 to rotate by a predetermined angle to complete the switching of adjacent calibration holes 1151 to the same position, thereby improving control accuracy.

[0045] In actual application scenarios, the calibration and detection process of the probe of the present application is as follows:

[0046] The driving unit 111 drives the fan-shaped calibration plate 115 to rotate around the rotation axis (driving shaft) of the driving unit, and the driving positioning unit 112 (encoder) detects the rotation angle of the driving unit 111 during rotation. Among them, the calibration sheet material adopts materials with stable performance such as PET, stainless steel sheet, aluminum foil, etc. In the probe assembly process, the real value of the grammage is obtained by cutting, weighing in advance, and then placed in the calibration hole 1151 on the fan-shaped calibration plate 115, and one calibration hole 1151 at the end is left without a calibration sheet.

[0047] In the calibration preparation stage, the driving unit 111 drives the fan-shaped calibration plate 115 to rotate counterclockwise, and the detection unit 114 detects the left side of the fan-shaped calibration plate 115. Once the left side of the fan-shaped calibration plate 115 triggers the detection unit 114, the driving unit 111 stops rotating (as shown in Fig. 3 ), that is, the rotation zero point position of the driving unit 111 can be determined, and the angle of the subsequent clockwise rotation of the driving unit 111 can be determined by the driving positioning unit 112.

[0048] In the calibration process, as the fan-shaped calibration plate 115 rotates clockwise, the calibration pieces in the calibration holes 1151 of the fan-shaped calibration plate 115 rotate around the rotating shaft of the driving unit 111, and the calibration pieces pass the rays emitted by the ray unit 12 one by one. After the fan-shaped calibration plate 115 rotates by a certain angle, all the calibration pieces in the calibration holes 1151 of the fan-shaped calibration plate 115 have been measured, and the driving unit 111 stops rotating. At this time, the grammage measurement values of all the calibration pieces are obtained, and the correlation analysis is performed on the real values of the grammage of each calibration piece obtained in the probe assembly process, so that the mechanism operation of the grammage detection equipment calibration is completed.

[0049] In the product grammage detection stage, the driving unit 111 drives the fan-shaped calibration plate 115 to stop at a certain angle, so that the last material-free hole (calibration hole 1151 without calibration pieces) in the fan-shaped calibration plate 115 is aligned with the rays emitted by the ray unit 12. At this time, the rays pass through the fan-shaped calibration plate 115 without obstruction, which is used for product grammage detection.

[0050] The utility model can at least achieve the following effects:

[0051] 1. The reference quantity piece (calibration piece) is used to replace the product to calibrate the grammage detection equipment, and the production, sample making, calibration of each product of each equipment is not needed, so that the calibration time and labor are saved, the product material is not wasted, and the cost is saved.

[0052] 2. The calibration assembly and the reference quantity piece are placed in the probe, the calibration device and the reference quantity piece are not needed to be installed and disassembled during the calibration of the grammage detection equipment, the data indexes such as the quantitative monitoring of the ray attenuation and the sensor performance aging can be monitored, the calibration of the grammage detection equipment can be carried out on line at the right moment, the calibration can be completed when the probe is returned to the warehouse, the calibration time is very short, the production line does not need to be stopped, and the operation of the grammage detection equipment is not affected.

[0053] 3. The fan-shaped calibration plate is used instead of the whole disc, which is beneficial to save space, reduce the volume of the probe, increase the product detection width under the condition of the same type of grammage detection equipment, reduce the number of calibration holes of the fan-shaped calibration plate, reduce the number of reference quantity pieces needed for calibration, and further improve the calibration speed. The motor directly drives the fan-shaped calibration plate, reduces the gear transmission link, the mechanism is more simple, the transmission link is less, the number of parts assembly is less, which is beneficial to the reliability of the product and reduces the failure probability.

[0054] The utility model also provides a grammage detection equipment which comprises at least one probe.

[0055] While the preferred embodiments of the application have been described, those skilled in the art will note that various modifications and changes can be made thereto without departing from the spirit and scope of the application. Accordingly, it is intended that all such modifications and changes be included within the scope of the application. Obviously, many modifications and variations of the present application are possible in light of the above teachings. It is, therefore, to be understood that within the scope of the appended claims and their equivalents, the application can be practiced otherwise than as specifically described.

Claims

1. A probe of a grammage detection apparatus, characterized in that, The probe comprises a probe shell, a ray unit and a calibration assembly, the ray unit and the calibration assembly are fixed in the probe shell; The calibration space is arranged between the ray unit and the inner wall of the probe shell corresponding to the direction of the ray emitted by the ray unit; The calibration assembly comprises a driving unit and a sector-shaped calibration plate, the driving unit is fixed in the probe shell and connected to the sector-shaped calibration plate, the sector-shaped calibration plate is arranged in the calibration space through the driving unit, at least one calibration hole is arranged on the sector-shaped calibration plate away from the end connected to the driving unit, and at least one calibration piece is arranged in the calibration hole; At least one of the calibration holes has a corresponding rotation angle range, and the calibration hole at least partially overlaps the ray path of the ray unit in the corresponding rotation angle range.

2. The probe of the basis weight detection apparatus of claim 1, wherein, The calibration assembly further comprises a detection unit and a driving positioning unit connected to the detection unit, the detection unit is fixed to the probe shell, the detection unit completes the position detection of the sector-shaped calibration plate and reaches the maximum rotation angle of the sector-shaped calibration plate when the detection unit partially overlaps the sector-shaped calibration plate, and the driving positioning unit is fixedly connected to the driving unit and positions the angle at which the driving unit drives the sector-shaped calibration plate to rotate.

3. The probe of the basis weight detection apparatus of claim 2, wherein, The detection unit is an optical sensor, and the driving positioning unit is an encoder.

4. The probe of the basis weight detection apparatus of claim 1, wherein, The driving unit and the ray unit are arranged in series along the movement direction of the probe, and the width of the calibration assembly is not greater than the width of the ray unit.

5. The probe of the basis weight detection apparatus of claim 1, wherein, The driving unit and the ray unit are arranged side by side along the movement direction of the probe.

6. The probe of the basis weight detection apparatus of claim 1, wherein, The distance from all the calibration holes to the connection position of the sector-shaped calibration plate and the driving unit is equal, and all the calibration holes are uniformly arranged on the sector-shaped calibration plate.

7. The probe of the basis weight detection apparatus of claim 1, wherein The material of the calibration piece is PET, stainless steel sheet or aluminum foil.

8. The probe of the basis weight detection apparatus of claim 1, wherein, At least two calibration holes are arranged on the sector-shaped calibration plate, and one of the calibration holes is not provided with a calibration piece.

9. The probe of the basis weight detection apparatus of claim 1, wherein, At least three calibration holes are arranged on the sector-shaped calibration plate, one of the calibration holes is not provided with a calibration piece, and a plurality of calibration pieces have different grammage specifications.

10. A grammage detection device, characterized in that, The probe comprises at least one probe as claimed in any one of claims 1-9.

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