Ultrasonic displacement sensor calibration device

Abstract

The utility model discloses an ultrasonic wave displacement sensor calibration device, an ultrasonic wave displacement sensor is arranged above a conveying channel, a conveying surface is arranged in the conveying channel, the conveying surface is used for conveying tobacco shreds, the ultrasonic wave displacement sensor is used for detecting the height of the tobacco shreds on the conveying surface, the calibration device comprises a mounting rack; the reflecting plate is arranged on the mounting frame, is parallel to the conveying surface, is positioned between the conveying surface and the ultrasonic displacement sensor, and is used for reflecting the ultrasonic waves emitted by the ultrasonic displacement sensor; the graduated scale is arranged on the mounting frame, the extension direction of the graduated scale is perpendicular to the conveying surface, and the graduated scale is used for measuring the distance between the upper surface of the reflecting plate and the conveying surface. According to the utility model, whether the detection value of the ultrasonic displacement sensor is accurate or not can be quickly and conveniently verified, so that the calibration efficiency of the ultrasonic displacement sensor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of detection devices, in particular to an ultrasonic displacement sensor calibration device. Background Art

[0002] Ultrasonic displacement sensor is a sensor that uses ultrasonic technology for measurement. It consists of an ultrasonic generator, an ultrasonic detector and a measurement circuit. Ultrasonic displacement sensor is a new type of measuring instrument that can accurately and non-contactly measure the position, displacement and other changes of the measured object.

[0003] In the tobacco industry's tobacco processing production line, ultrasonic displacement sensors are installed on the conveying channel of the shredding process to detect the height of tobacco on the conveying channel to control the amount of tobacco feed. Usually, ultrasonic displacement sensors need to be calibrated before use to ensure their detection accuracy. At present, due to the lack of fast and convenient calibration devices, the calibration of ultrasonic displacement sensors is time-consuming and inefficient. Utility Model Content

[0004] The purpose of the utility model is to solve the problem that the calibration of ultrasonic displacement sensors is time-consuming and inefficient due to the lack of a fast and convenient calibration device. The utility model provides an ultrasonic displacement sensor calibration device that can quickly and conveniently verify whether the detection value of the ultrasonic displacement sensor is accurate, thereby improving the calibration efficiency of the ultrasonic displacement sensor.

[0005] In order to solve the above technical problems, the embodiment of the utility model discloses an ultrasonic displacement sensor calibration device, wherein the ultrasonic displacement sensor is arranged above the conveying channel, a conveying surface is arranged in the conveying channel, the conveying surface is used to convey tobacco, and the ultrasonic displacement sensor is used to detect the height of tobacco on the conveying surface. The calibration device comprises:

[0006] Mounting frame;

[0007] A reflector is provided on the mounting frame, the reflector is parallel to the conveying surface, the reflector is located between the conveying surface and the ultrasonic displacement sensor, and the reflector is used to reflect the ultrasonic wave emitted by the ultrasonic displacement sensor;

[0008] The scale is arranged on the mounting frame, the extension direction of the scale is perpendicular to the conveying surface, and the scale is used to measure the distance between the upper surface of the reflective plate and the conveying surface.

[0009] When in use, the ultrasonic displacement sensor can detect the distance between the upper surface of the reflector and the conveying surface, recorded as A; the scale can directly read the actual distance between the upper surface of the reflector and the conveying surface, recorded as B. If A and B are not equal, it means that there is an error in the ultrasonic displacement sensor, and the ultrasonic displacement sensor needs to be adjusted to improve its detection accuracy. The above technical solution can quickly and conveniently verify whether the detection value of the ultrasonic displacement sensor is accurate, which can shorten the calibration time and improve the calibration efficiency.

[0010] Optionally, the mounting frame comprises:

[0011] Base;

[0012] The vertical pole is arranged on the base, the vertical pole is perpendicular to the conveying surface, the scale is arranged on the vertical pole, and the reflective plate is directly or indirectly connected to the vertical pole.

[0013] Optionally, the reflective plate can slide on the vertical pole along a first direction, and the first direction is an extension direction of the vertical pole.

[0014] Optionally, a strip hole is provided on the vertical pole, and the strip hole extends along the first direction, and the mounting frame further includes:

[0015] A connecting rod extending in a second direction perpendicular to the first direction, one end of the connecting rod being connected to the reflecting plate, a first threaded hole being provided on an end surface of the other end of the connecting rod, and an axis of the first threaded hole extending in the second direction;

[0016] The first bolt passes through the strip hole and is threadedly connected with the first threaded hole.

[0017] Optionally, the reflective plate is movable along a second direction relative to the vertical pole.

[0018] Optionally, the connecting rod comprises:

[0019] A rod body, one end of which is connected to the vertical rod, and the rod body is provided with a plurality of second threaded holes which are sequentially spaced along a second direction;

[0020] A sleeve is sleeved on the rod body, one end of the sleeve is connected to the reflector, and a through hole is provided on the side wall of the sleeve;

[0021] The second bolt passes through the through hole and is threadedly connected with the second threaded hole.

[0022] Optionally, the first bolt is a butterfly bolt.

[0023] Optionally, a copper bar chain is provided in the conveying channel, and the upper surface of the copper bar chain constitutes the conveying surface.

[0024] Optionally, the mounting frame and the reflective plate are made of stainless steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The figure shows the installation position of the ultrasonic displacement sensor in the background technology;

[0026] Figure 2 A schematic diagram showing the structure of a calibration device in an embodiment of the utility model is shown;

[0027] Figure 3 A schematic diagram showing the calibration device in the embodiment of the utility model when in use.

[0028] Figure numerals: 1. ultrasonic displacement sensor, 2. conveying channel, 3. conveying surface, 4. mounting frame, 5. reflector, 6. scale, 8. base, 9. vertical pole, 10. strip hole, 11. connecting rod, 12. rod body, 13. second threaded hole, 14. sleeve, 15. through hole, 16. second bolt, 17. copper bar chain, 18. first bolt, 19. counterweight. DETAILED DESCRIPTION

[0029] The following is an explanation of the implementation of the present invention by specific specific embodiments. Those skilled in the art can easily understand other advantages and functions of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation. On the contrary, the purpose of introducing the utility model in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0030] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0031] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0032] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0033] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0034] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0035] The embodiment of the utility model discloses an ultrasonic displacement sensor calibration device, which is used to calibrate the detection accuracy of the ultrasonic displacement sensor. Figure 1 , the ultrasonic displacement sensor 1 is arranged above the conveying channel 2, and a conveying surface 3 is arranged in the conveying channel 2, and the conveying surface 3 is used to convey tobacco. Specifically, a copper bar chain 17 is arranged in the conveying channel 2, and the upper surface of the copper bar chain 17 constitutes the conveying surface 3, and the tobacco is conveyed through the copper bar chain 17. The ultrasonic displacement sensor 1 is used to detect the height of the tobacco on the conveying surface 3. It can be known from the tobacco processing technology that the height of the tobacco in the conveying channel 2 is generally between 30-60cm. Therefore, in actual installation, the ultrasonic displacement sensor 1 is generally arranged at a position 100cm away from the conveying surface 3, and the ultrasonic displacement sensor 1 is electrically connected to the control system of the peripheral device. When the ultrasonic wave sent by the ultrasonic displacement sensor 1 is reflected by the upper surface of the tobacco, the control system electrically connected to the ultrasonic displacement sensor 1 will automatically calculate the distance between the upper surface of the tobacco and the sensor, and subtract the distance between the upper surface of the tobacco and the sensor from 100 to obtain the thickness value of the tobacco, and transmit the thickness value to the display unit for display. The operator can know the height of the tobacco by directly reading the numbers on the display unit. In addition, there is a reset button on the controller to reset the sensor to zero.

[0036] like Figure 2 and Figure 3As shown, the calibration device provided in the embodiment of the present application includes: a mounting frame 4, a reflector 5 and a scale 6. Among them, the reflector 5 is arranged on the mounting frame 4, the reflector 5 is parallel to the conveying surface 3, the reflector 5 is located between the conveying surface 3 and the ultrasonic displacement sensor 1, and the reflector 5 is used to reflect the ultrasonic wave emitted by the ultrasonic displacement sensor 1. The scale 6 is arranged on the mounting frame 4, the extension direction of the scale 6 is perpendicular to the conveying surface 3, and the scale 6 is used to measure the distance between the upper surface of the reflector 5 and the conveying surface 3. Specifically, since the actual height of the tobacco is 30-60cm, the measuring range of the scale 6 in this embodiment is set to 70cm.

[0037] When in use, the reflector 5 is used to simulate the upper surface of the tobacco, and the ultrasonic displacement sensor 1 can measure the distance between the upper surface of the reflector 5 and the sensor (such as Figure 3 The control system calculates the distance between the upper surface of the reflector 5 and the conveying surface 3 based on the distance C (as shown in the dimension C in FIG. Figure 3 At the same time, the operator can directly read the actual distance between the upper surface of the reflector 5 and the conveying surface 3 through the scale 6 (as shown in the dimension A in FIG. Figure 3 If the distance A is not equal to the distance B, it means that there is an error in the ultrasonic displacement sensor 1, and the ultrasonic displacement sensor 1 needs to be adjusted according to the actual situation to correct its detection result and improve its detection accuracy. The above technical solution can quickly and conveniently verify whether the detection value of the ultrasonic displacement sensor 1 is accurate, which can shorten the calibration time and improve the calibration efficiency. For example, in some embodiments, the ultrasonic displacement sensor 1 is connected to the side wall of the conveying channel through a bracket, and the bracket can be moved along a first direction (such as Figure 2 The ultrasonic displacement sensor 1 can be extended or retracted in the X direction (as shown) to facilitate adjusting the installation height of the ultrasonic displacement sensor 1.

[0038] How to adjust the ultrasonic displacement sensor 1 is described in detail below through two embodiments.

[0039] Embodiment 1:

[0040] When the actual distance between the upper surface of the reflector 5 and the conveying surface 3 is read by the scale 6 (eg Figure 3 When the dimension B is 30, that is, the actual distance between the upper surface of the reflector 5 and the sensor (as shown in FIG. Figure 3 If the display unit shows a value of 28, the distance between the upper surface of the reflector 5 and the conveying surface 3 calculated by the control system (as shown in the dimension D in FIG. 1 ) is 70 cm. Figure 3 As shown in the dimension A in FIG, 28 cm, the installation height of the ultrasonic displacement sensor 1 is 100 cm, and the distance between the upper surface of the reflector 5 detected by the ultrasonic displacement sensor 1 and the sensor can be deduced (as shown in FIG. Figure 3 At this time, the installation position of the ultrasonic displacement sensor 1 needs to be moved down by 2 cm along the first direction. After adjustment, the distance between the upper surface of the reflector 5 and the sensor detected by the ultrasonic displacement sensor 1 (as shown in the dimension C) is 72 cm. Figure 3 The dimension C in FIG. 1 is shown as a dimension C in FIG. 2 ) will be reduced by 2 compared to before the adjustment, and the distance between the upper surface of the reflector 5 and the conveying surface 3 (as shown in FIG. Figure 3 The dimension A shown in FIG. 1 is increased by 2 compared to the dimension A before adjustment, from 28 to 30, which is different from the actual distance between the upper surface of the reflector 5 and the conveying surface 3 (as shown in FIG. Figure 3 The dimensions B in the figure are equal, thus completing the calibration and correction of the sensor.

[0041] Embodiment 2:

[0042] When the actual distance between the upper surface of the reflector 5 and the conveying surface 3 is read by the scale 6 (eg Figure 3 When the actual distance between the upper surface of the reflector 5 and the sensor (as shown in the dimension B in FIG. 1 ) is 60, that is, the actual distance between the upper surface of the reflector 5 and the sensor (as shown in the dimension B in FIG. 1 ) is 60, Figure 3 If the display unit shows a value of 65, the distance between the upper surface of the reflector 5 and the conveying surface 3 calculated by the control system (as shown in the dimension D in FIG. 1 ) is 40 cm. Figure 3 As shown in the dimension A in FIG, 1 , the distance between the upper surface of the reflector 5 detected by the ultrasonic displacement sensor 1 and the sensor can be calculated as follows: Figure 3 At this time, the installation position of the ultrasonic displacement sensor 1 needs to be moved upward by 5 cm along the first direction. After the adjustment, the distance between the upper surface of the reflector 5 and the sensor detected by the ultrasonic displacement sensor 1 (as shown in the dimension C in FIG. 1 ) is 35 cm. Figure 3 As shown in the dimension C in FIG. 5 , the distance between the upper surface of the reflector plate 5 and the conveying surface 3 is increased by 5 (as shown in the dimension C in FIG. 5 ). Figure 3 The actual distance between the upper surface of the reflector 5 and the conveying surface 3 (as shown in the dimension A in FIG. 1 ) is reduced by 5 from 65 to 60, which is different from the actual distance between the upper surface of the reflector 5 and the conveying surface 3 (as shown in FIG. Figure 3 If the dimensions B are equal, the sensor calibration and correction is completed.

[0043] Optionally, the mounting frame 4 includes a base 8 and a vertical pole 9. When in use, the base 8 is used to be placed on the conveying surface 3, and a counterweight 19 is provided in the base 8 to balance the center of gravity of the entire device, thereby improving the stability of the entire device. Specifically, the thickness of the base 8 is set to 10 cm. The vertical pole 9 is arranged on the base 8, the vertical pole 9 is perpendicular to the conveying surface 3, and the scale 6 is arranged on the vertical pole 9. Specifically, in combination with the thickness of the base 8 and the height range of the tobacco, the minimum scale of the scale 6 is set to 10 cm, and the maximum scale is set to 60 cm. The reflector 5 is directly or indirectly connected to the vertical pole 9.

[0044] Optionally, the reflective plate 5 can slide on the vertical rod 9 along a first direction, where the first direction is an extension direction of the vertical rod 9 .

[0045] Alternatively, if Figure 2 As shown, the vertical rod 9 is provided with a strip hole 10, and the strip hole 10 extends along the first direction. The mounting frame 4 also includes a connecting rod 11 and a first bolt 18. Among them, the connecting rod 11 extends along the second direction (such as Figure 2 The first and second directions are perpendicular to the first direction. One end of the connecting rod 11 is connected to the reflector 5. A first threaded hole is provided on the end surface of the other end of the connecting rod 11. The axis of the first threaded hole extends along the second direction. The first bolt 18 passes through the strip hole 10 and is threadedly connected to the first threaded hole. Specifically, for easy disassembly, the first bolt 18 is a butterfly bolt.

[0046] By adopting the above technical solution, the distance between the reflective plate 5 and the conveying surface 3 can be adjusted after loosening the first bolt 18, so that the ultrasonic displacement sensor 1 can detect the position of the reflective plate 5 at any position, thereby facilitating the calibration of the distance between the upper surface of the reflective plate 5 at any height and the conveying surface 3.

[0047] Optionally, the reflective plate 5 can move along the second direction relative to the upright pole 9 .

[0048] Alternatively, if Figure 2 As shown, the connecting rod 11 includes: a rod body 12, a sleeve 14 and a second bolt 16. One end of the rod body 12 is connected to the vertical rod 9, and the rod body 12 is provided with a plurality of second threaded holes 13 arranged in sequence along the second direction. For example, the number of the second threaded holes 13 is four. The sleeve 14 is sleeved on the rod body 12, and one end of the sleeve 14 is connected to the reflector 5. A through hole 15 is provided on the side wall of the sleeve 14. The second bolt 16 passes through the through hole 15 and is threadedly connected to the second threaded hole 13.

[0049] By adopting the above technical solution, the distance between the reflector 5 and the upright 9 is adjusted by changing the relative position of the sleeve 14 and the rod body 12 to ensure that the ultrasonic wave emitted by the ultrasonic displacement sensor 1 can be projected onto the reflector 5 and reflected by the reflector 5 .

[0050] Optionally, the mounting frame 4 and the reflecting plate 5 are made of food-grade stainless steel to prevent contamination of the tobacco.

[0051] The ultrasonic displacement sensor 1 calibration device disclosed in the embodiment of the utility model can quickly and conveniently verify whether the detection value of the ultrasonic displacement sensor 1 is accurate, thereby improving the calibration efficiency of the ultrasonic displacement sensor 1.

[0052] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above contents are further detailed descriptions of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. An ultrasonic displacement sensor calibration device, wherein the ultrasonic displacement sensor is arranged above a conveying channel, a conveying surface is arranged in the conveying channel, the conveying surface is used to convey tobacco, and the ultrasonic displacement sensor is used to detect the height of the tobacco on the conveying surface, characterized in that: The calibration device comprises: Mounting frame; A reflective plate, arranged on the mounting frame, the reflective plate is parallel to the conveying surface, the reflective plate is located between the conveying surface and the ultrasonic displacement sensor, and the reflective plate is used to reflect the ultrasonic wave emitted by the ultrasonic displacement sensor; A scale is arranged on the mounting frame, the extension direction of the scale is perpendicular to the conveying surface, and the scale is used to measure the distance between the upper surface of the reflector and the conveying surface.

2. The ultrasonic displacement sensor calibration device according to claim 1, characterized in that: The mounting frame comprises: Base; A vertical pole is arranged on the base, the vertical pole is perpendicular to the conveying surface, the scale is arranged on the vertical pole, and the reflector is directly or indirectly connected to the vertical pole.

3. The ultrasonic displacement sensor calibration device according to claim 2, characterized in that: The reflective plate can slide on the vertical pole along a first direction, and the first direction is an extending direction of the vertical pole.

4. The ultrasonic displacement sensor calibration device according to claim 3, characterized in that: The vertical rod is provided with a strip hole, and the strip hole extends along the first direction. The mounting frame further includes: A connecting rod extending in a second direction, the second direction being perpendicular to the first direction, one end of the connecting rod being connected to the reflecting plate, a first threaded hole being provided on an end surface of the other end of the connecting rod, and an axis of the first threaded hole extending in the second direction; A first bolt passes through the strip-shaped hole and is threadedly connected to the first threaded hole.

5. The ultrasonic displacement sensor calibration device according to claim 4, characterized in that: The reflective plate can move relative to the vertical pole along the second direction.

6. The ultrasonic displacement sensor calibration device according to claim 5, characterized in that: The connecting rod comprises: A rod body, one end of which is connected to the vertical rod, and the rod body is provided with a plurality of second threaded holes which are sequentially spaced along the second direction; A sleeve, sleeved on the rod body, one end of the sleeve is connected to the reflector, and a through hole is provided on the side wall of the sleeve; A second bolt passes through the through hole and is threadedly connected to the second threaded hole.

7. The ultrasonic displacement sensor calibration device according to claim 4, characterized in that: The first bolt is a butterfly bolt.

8. The ultrasonic displacement sensor calibration device according to claim 1, characterized in that: A copper bar chain is arranged in the conveying channel, and the upper surface of the copper bar chain constitutes a conveying surface.

9. The ultrasonic displacement sensor calibration device according to claim 1, characterized in that: The mounting frame and the reflecting plate are made of stainless steel.

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