An empty bag detection device

Abstract

This utility model proposes an empty bag detection device, including a mounting frame, a first pressure plate, a second pressure plate, and a driving structure. The first pressure plate is mounted on the mounting frame, and the first and second pressure plates are arranged opposite to each other, forming an installation gap between them. The driving structure is connected to the second pressure plate to drive the second pressure plate to move closer to or away from the first pressure plate. Multiple pressure sensors are provided at the end of the first pressure plate facing the second pressure plate. By analyzing the pressure feedback from the multiple pressure sensors at the first pressure plate, it is possible to determine whether the bagged product contains an empty bag, effectively detecting empty products. Subsequently, when an empty bag is detected, the empty bagged product can be rejected, preventing the outflow of empty products.

Description

Technical Field

[0001] This utility model relates to the field of empty bag detection technology, specifically to an empty bag detection device. Background Technology

[0002] In the production of packaged food containing granules and other materials, after packaging, a clamping inspection device is used to inspect the product online. If the gap between the two clamps is less than a certain size, the bag can be determined to be an empty bag without material and will be rejected in the next process to prevent empty bags from flowing into the final product. Because some products are filled with nitrogen during packaging to achieve an aesthetically pleasing appearance and to isolate the product from oxygen and prevent oxidation, the gap between the clamping inspection device and the empty bag is smaller during online inspection. This causes the clamping inspection device to fail to detect the empty bag. Utility Model Content

[0003] This utility model addresses one of the problems existing in the prior art to a certain extent. Therefore, one objective of this utility model is to provide an empty bag detection device that can effectively detect empty package products.

[0004] The above objective is achieved through the following technical solution: An empty bag detection device includes a mounting frame, a first pressure plate, a second pressure plate, and a driving structure. The first pressure plate is mounted on the mounting frame, and the first pressure plate and the second pressure plate are arranged opposite to each other, with an installation gap between them. The driving structure is connected to the second pressure plate to drive the second pressure plate to move towards or away from the first pressure plate. A plurality of pressure sensors are provided at one end of the first pressure plate facing the second pressure plate.

[0005] As a further improvement of this utility model, a mounting groove is provided at one end of the first pressure plate facing the second pressure plate, and the pressure sensor is disposed at the mounting groove.

[0006] As a further improvement of this utility model, there are 6-12 pressure sensors on the first pressure plate.

[0007] As a further improvement of this utility model, the drive structure includes a drive motor, a drive gear, and a transmission rod. The drive gear is mounted on the motor shaft of the drive motor, and the transmission rod has gear teeth. The drive gear meshes with the transmission rod through the gear teeth on the transmission rod, and the transmission rod is connected to the second pressure plate.

[0008] As a further improvement of this utility model, it also includes an integrated circuit, an input line, and an output line. One end of the input line is connected to the pressure sensor, and the other end is connected to the integrated circuit. One end of the output line is connected to the pressure sensor, and the other end is connected to the integrated circuit.

[0009] As a further improvement of this utility model, the pressure sensor includes a sensor body and a voltage-conducting block disposed at the upper end of the sensor body. The input line and the output line are respectively connected to the sensor body, and the connection point between the input line and the sensor body is a first connection point, and the connection point between the output line and the sensor body is a second connection point. A connection gap is formed between the first connection point and the second connection point, and the voltage-conducting block is above the connection gap.

[0010] As a further improvement of this utility model, it also includes a controller, which is electrically connected to the integrated circuit and the drive structure respectively.

[0011] As a further improvement of this utility model, the installation spacing is 2-5cm.

[0012] Compared with the prior art, the present invention has at least the following beneficial effects: 1. This utility model proposes an empty bag detection device. By setting multiple pressure sensors at the first pressure plate to provide feedback on the pressure, it can determine whether the bagged product is empty, effectively detecting empty products. Subsequently, when the bagged product is detected to be empty, the empty bagged product can be rejected to prevent the outflow of empty products. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of an empty bag detection device in one embodiment; Figure 2 This is a schematic diagram of the driving structure in the embodiment; Figure 3 This is a schematic diagram of the structure of the first pressure plate in the embodiment; Figure 4 yes Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the pressure sensor, integrated circuit, input line, and output line in the embodiment. Figure 6 This is a schematic diagram of the pressure sensor in the embodiment; Figure 7 This is a schematic diagram showing the distribution of pressure sensors on the first pressure plate in the embodiment. Detailed Implementation

[0014] The following embodiments illustrate the present invention, but the present invention is not limited to these embodiments. Modifications to the specific implementation of the present invention or equivalent substitutions for some technical features, without departing from the spirit of the present invention, should all be covered within the scope of the technical solution claimed by the present invention.

[0015] like Figure 1-7 An empty bag detection device includes a mounting frame, a first pressure plate 1, a second pressure plate 2, and a driving structure 3. The first pressure plate 1 is mounted on the mounting frame, and the first pressure plate 1 and the second pressure plate 2 are arranged opposite to each other, with an installation gap 6 between them. The driving structure 3 is connected to the second pressure plate 2 to drive the second pressure plate 2 to move towards or away from the first pressure plate 1. A plurality of pressure sensors 4 are provided at one end of the first pressure plate 1 facing the second pressure plate 2.

[0016] This utility model proposes an empty bag detection device. The strip package product 5 is placed in the installation gap 6 formed by the first pressure plate 1 and the second pressure plate 2. The second pressure plate 2 is driven to move closer to the first pressure plate 1 by the driving structure 3. When the second pressure plate 2 presses the strip package product 5 between the first pressure plate 1 and the second pressure plate 2, if there is material in the strip package product 5, that is, there is particulate material or other material, then in the pressure sensor 4 on the first pressure plate 1, there will be a situation where some pressure sensors 4 are pressed and some pressure sensors 4 are not pressed. If the packaged product 5 is empty and filled with nitrogen or other inert gas, the second pressure plate 2 will press evenly against the first pressure plate 1, and the multiple pressure sensors 4 on the first pressure plate 1 will sense the pressure.

[0017] By setting multiple pressure sensors 4 at the first pressure plate 1 to provide feedback on the pressure, it can be determined whether the packaged product 5 is empty, effectively detecting empty products. Subsequently, when the packaged product 5 is detected to be empty, the empty packaged product 5 can be removed to prevent empty products from entering the market.

[0018] In this embodiment, the installation spacing 6 is 2-5 cm. The installation spacing 6 is used to accommodate the strip package product 5. In the initial state, when the strip package product 5 is placed within the installation spacing 6, there is a first gap between the strip package product 5 and the first pressure plate 1, and a second gap between the strip package product 5 and the second pressure plate 2.

[0019] When the packaged product 5 is placed in the installation spacing 6, the particles or other materials inside the packaged product 5 will settle at the lower end of the product under the action of gravity. The first pressure plate 1 and the second pressure plate 2 will be at both ends of the lower end of the packaged product 5.

[0020] A mounting groove 41 is provided at one end of the first pressure plate 1 facing the second pressure plate 2, and the pressure sensor 4 is disposed at the mounting groove 41.

[0021] In this embodiment, when the pressure sensor 4 is installed in the mounting groove 41, the gap distance H1 between the pressure sensor 4 and the groove opening is 1-1.5mm.

[0022] The first pressure plate 1 is provided with 6-12 pressure sensors 4. In this embodiment, the first pressure plate 1 is provided with 8 pressure sensors 4.

[0023] In the case of an empty package, when the second pressure plate 2 moves closer to the first pressure plate 1 and presses the empty package product onto the first pressure plate 1, since the empty package product is filled with inert gas, the empty package product with inert gas will press and fill into the mounting groove 41, further pressing the pressure sensor 4, so that all the pressure sensors on the pressure plate will be under pressure. When the package is not empty, as the second pressure plate 2 moves closer to the first pressure plate 1 and presses the packaged product 5 containing material onto the first pressure plate 1, the packaged product 5 is uneven during the pressing process due to the material. The bulging parts of the packaged product will resist the further movement of the second pressure plate towards the first pressure plate. At this time, the bulging parts of the packaged product will also press against the first pressure plate, while the flattened parts will not. Therefore, the pressure sensors on the first pressure plate are partially pressed and partially unpressed. In other words, due to the material touching the packaged product 5 or its unevenness, the packaged product containing material cannot be completely pressed into each pressure sensor, resulting in a difference in the sensing effect between the packaged product containing material and the empty packaged product.

[0024] In some embodiments, a package is considered empty if all pressure sensors or more than 90% of pressure sensors detect pressure. The rest are considered packages containing material.

[0025] The pressure sensors 4 are irregularly distributed on the first pressure plate 1, or randomly distributed on the first pressure plate 1. That is, the pressure sensors 4 are randomly and dispersedly distributed on the first pressure plate 1. In other words, the pressure sensors 4 are not evenly distributed on the first pressure plate 1. This random distribution of the pressure sensors 4 means that only when the package is empty will the randomly distributed sensors all feel the pressure under the pressure of the second pressure plate 2. However, when the packaged product 5 is not empty, due to the unevenness of the material inside the packaged product 5, under the pressure of the second pressure plate 2, some pressure sensors 4 will feel the pressure, while others will not.

[0026] In some embodiments, the eight pressure sensors 4 are respectively a first pressure sensor, a second pressure sensor, a third pressure sensor, a fourth pressure sensor, a fifth pressure sensor, a sixth pressure sensor, a seventh pressure sensor, and an eighth pressure sensor.

[0027] The first pressure sensor 401 and the second pressure sensor 402 are at the first height; The third pressure sensor 403, the fourth pressure sensor 404, and the fifth pressure sensor 405 are located at the second height. The sixth pressure sensor 406, the seventh pressure sensor 407, and the eighth pressure sensor 408 are located at the third height. Furthermore, the first height is greater than the second height, and the second height is greater than the third height. Therefore, the pressure sensors will be distributed at different heights.

[0028] Furthermore, the lateral distance between the first pressure sensor and the left edge is the first distance, and the lateral distance between the second pressure sensor and the left edge is the second distance, with the second distance being greater than the first distance; The lateral distance between the third pressure sensor and the left edge is the third distance; the lateral distance between the fourth pressure sensor and the left edge is the fourth distance; the lateral distance between the fifth pressure sensor and the left edge is the fifth distance, and the fifth distance is greater than the fourth distance, and the fourth distance is greater than the third distance. The lateral distance between the sixth pressure sensor and the left edge is the sixth distance, the lateral distance between the seventh pressure sensor and the left edge is the seventh distance, and the lateral distance between the eighth pressure sensor and the left edge is the eighth distance. The eighth distance is greater than the seventh distance, and the seventh distance is greater than the sixth distance. That is, pressure sensors at the same height will be located at different lateral distances; and pressure sensors at different heights will also be located at the same or different lateral distances. This results in an irregular distribution of pressure sensors.

[0029] The drive structure 3 includes a drive motor 31, a drive gear 32, and a transmission rod 33. The drive gear 32 is mounted on the motor shaft of the drive motor 31. The transmission rod 33 has teeth. The drive gear 32 meshes with the transmission rod 33 through the teeth on the transmission rod 33. The transmission rod 33 is connected to the second pressure plate 2.

[0030] The drive motor 31 drives the drive gear 32 to rotate. Since the drive gear 32 meshes with the gear teeth on the transmission rod 33, the rotation of the drive gear 32 will drive the transmission rod 33 to move closer to or away from the first pressure plate 1, thereby driving the second pressure plate 2 to move closer to or away from the first pressure plate 1.

[0031] It also includes an integrated circuit 71, an input line 72, and an output line 73. One end of the input line 72 is connected to the pressure sensor 4, and the other end is connected to the integrated circuit 71. One end of the output line 73 is connected to the pressure sensor 4, and the other end is connected to the integrated circuit 71.

[0032] In this embodiment, the integrated circuit 71 is located within the first pressure plate 1 and is connected to a plurality of pressure sensors 4 on the first pressure plate 1.

[0033] One end of the input line 72 and the output line 73 are connected to the pressure sensor 4, and the other end is connected to the integrated circuit 71. That is, the input line 72 and the output line 73 are not connected to each other, so that the input line 72 and the output line 73 are not conductive to the integrated circuit 71.

[0034] The pressure sensor 4 includes a sensor body 42 and a voltage-conducting block 43 disposed at the upper end of the sensor body 42. The input line 72 and the output line 73 are respectively connected to the sensor body 42, and the connection point between the input line 72 and the sensor body 42 is the first connection point, and the connection point between the output line 73 and the sensor body 42 is the second connection point. A connection gap 44 is formed between the first connection point and the second connection point, and the voltage-conducting block 43 is above the connection gap 44.

[0035] In this embodiment, the first connection point connecting the input line 72 and the sensor body 42 is located at the bottom of the sensor body 42; the second connection point connecting the output line 73 and the sensor body 42 is also located at the bottom of the sensor body 42. Furthermore, a connection gap 44 exists between the first and second connection points, meaning that the input line 72 and the output line 73 are not normally connected.

[0036] When the first pressure plate 1 presses close to the second pressure plate 2, the second pressure plate 2 will press the strip product 5 onto the first pressure plate 1. When the strip product 5 presses down to the voltage conducting block 43, the voltage conducting block 43 will press down to the bottom of the sensor body 42, connecting the first connection point and the second connection point.

[0037] It also includes a controller, which is electrically connected to the integrated circuit 71 and the drive structure 3 respectively.

[0038] The controller can control the drive motor 31 of the drive structure 3 to rotate, so as to drive the second pressure plate 2 to move closer to or further away from the first pressure plate 1.

[0039] Integrated circuit 71 is connected to multiple pressure sensors 4. Integrated circuit 71 can receive information about pressure detected by the pressure sensors 4 and feed the received information back to the controller to detect whether the package is empty. The controller can also be connected to a rejection device to reject empty packages and prevent them from being shipped out.

[0040] In some embodiments, when testing the same product, the distance the second pressure plate moves toward the first pressure plate is set to be constant.

[0041] The above preferred embodiments should be regarded as illustrative examples of the embodiments of the present application. Any technical deductions, substitutions, improvements, etc. that are similar to or based on the present application should be considered within the scope of protection of this patent.

Claims

1. A bag empty detection device characterized by comprising: The device includes a mounting bracket, a first pressure plate, a second pressure plate, and a driving structure. The first pressure plate is mounted on the mounting bracket. The first pressure plate and the second pressure plate are arranged opposite to each other and a mounting gap is formed between the first pressure plate and the second pressure plate. The driving structure is connected to the second pressure plate to drive the second pressure plate to move towards or away from the first pressure plate. A plurality of pressure sensors are provided at one end of the first pressure plate facing the second pressure plate.

2. The empty bag detection device according to claim 1, characterized in that, A mounting groove is provided at one end of the first pressure plate facing the second pressure plate, and the pressure sensor is disposed at the mounting groove.

3. The empty bag detection device according to claim 1, characterized in that, There are 6-12 pressure sensors on the first pressure plate.

4. The empty bag detection device according to claim 1, characterized in that, The drive structure includes a drive motor, a drive gear, and a transmission rod. The drive gear is mounted on the motor shaft of the drive motor. The transmission rod has teeth. The drive gear meshes with the transmission rod through the teeth on the transmission rod, and the transmission rod is connected to the second pressure plate.

5. The empty bag detection device according to claim 1, characterized in that, It also includes an integrated circuit, an input line, and an output line. One end of the input line is connected to the pressure sensor, and the other end is connected to the integrated circuit. One end of the output line is connected to the pressure sensor, and the other end is connected to the integrated circuit.

6. The empty bag detection device according to claim 5, characterized in that, The pressure sensor includes a sensor body and a voltage-conducting block disposed at the upper end of the sensor body. The input line and the output line are respectively connected to the sensor body, and the connection point between the input line and the sensor body is a first connection point, and the connection point between the output line and the sensor body is a second connection point. A connection gap is formed between the first connection point and the second connection point, and the voltage-conducting block is above the connection gap. It also includes a controller, which is electrically connected to the integrated circuit and the drive structure, respectively.

7. The empty bag detection device according to claim 1, characterized in that, The installation spacing is 2-5cm.

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