Bamboo chip front and back recognition device

Abstract

The utility model discloses a bamboo chip front and back recognition device which comprises a support, a bamboo chip rotating contact mechanism arranged on the support, a reset mechanism used for resetting the bamboo chip rotating contact mechanism and an electronic ruler connected with the bamboo chip rotating contact mechanism. According to the utility model, a mechanical structure is matched with the electronic ruler, so that the identification accuracy of the front and back surfaces of the bamboo chips is greatly improved with a relatively simple structure and relatively low cost, the misjudgment rate is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of bamboo product processing technology, specifically a device for identifying the front and back of bamboo strips. Background Technology

[0002] In bamboo processing, bamboo needs to be processed into bamboo strips. Automatic bamboo strip feeding machines require front-to-back identification to facilitate feeding according to actual needs. Existing identification methods, such as the bamboo strip front-to-back detection method and system disclosed in Chinese invention patent CN202210452303.1, include: irradiating the bamboo strip with a linear laser at an inclined angle to acquire an image of the reflected laser on the bamboo strip; identifying the reflected arc-shaped laser in the image and acquiring the pixel positions of the arc-shaped laser; performing differential processing on the pixels at the arc-shaped laser positions to remove abnormal pixels; and performing quadratic polynomial regression on the pixels at the differentially processed arc-shaped laser positions to determine the front-to-back of the bamboo strip based on the quadratic polynomial coefficients. This method and system, after processing the linear laser image, constructs a quadratic polynomial for regression, and further determines the front-to-back of the bamboo strip based on the sign of the regression quadratic polynomial coefficients. Using software algorithms for this determination can effectively reduce the cost of hardware-based identification and improve the success rate of detection. However, this method is not only relatively expensive, but also has a low success rate in recognition, which affects production efficiency. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a bamboo strip front and back identification device, which solves the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: a bamboo strip front and back identification device, including a bracket, a bamboo strip rotation contact mechanism disposed on the bracket, a reset mechanism for resetting the bamboo strip rotation contact mechanism, and an electronic ruler connected to the bamboo strip rotation contact mechanism.

[0005] As a further preferred technical solution of this utility model, the bamboo strip rotating contact mechanism includes at least three swing contact plates rotatably mounted on the bracket, and each of the swing contact plates is connected to one of the electronic rulers.

[0006] As a further preferred technical solution of this utility model, the swing contact plate is hinged to the bracket via a hinge shaft.

[0007] As a further preferred technical solution of this utility model, the reset mechanism includes a tension spring, and the swing contact plate is provided with a connecting hole that cooperates with the tension spring.

[0008] As a further preferred technical solution of this utility model, multiple swing contact plates are installed on the bracket at the same height.

[0009] As a further preferred technical solution of this utility model, the reset mechanism is a spring that is integrated into the electronic ruler.

[0010] As a further preferred technical solution of this utility model, the electronic ruler is a rod-type linear displacement sensor.

[0011] As a further preferred technical solution of this utility model, the end of the swing contact plate away from the electronic ruler is provided with a bamboo strip transition contact surface.

[0012] As a further preferred technical solution of this utility model, the swing contact plate is mounted on the hinge shaft by a bearing.

[0013] As a further preferred technical solution of this utility model, the number of the swing contact plates is 3, 4 or 5.

[0014] This invention provides a device for identifying the front and back of bamboo strips. Compared with the prior art, it has the following advantages:

[0015] By employing a mechanical structure in conjunction with an electronic ruler, and with a relatively simple structure and relatively low cost, the accuracy of identifying the front and back of bamboo strips has been significantly improved, the misjudgment rate has been reduced, and production efficiency has been increased. Attached Figure Description

[0016] Figure 1 This is a first-view structural schematic diagram of the present invention;

[0017] Figure 2 This is a structural schematic diagram of the present invention from a second perspective;

[0018] Figure 3 This is a schematic diagram of the structure of the end of the swing contact plate of this utility model;

[0019] Figure 4 for Figure 1 Enlarged structural diagram at point A;

[0020] Figure 5 for Figure 2 Enlarged structural diagram at point B.

[0021] In the diagram: 1. Bracket; 2. Reset mechanism; 3. Electronic ruler; 4. Hinge shaft; 5. Bearing; 6. Swinging contact plate; 7. Connecting hole; 8. Bamboo strip transition contact surface. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0023] Please see Figure 1-5In the earliest bamboo processing, manual operation was used. Identification and conveying were done by workers, resulting in relatively low efficiency. With the development of automated industrial equipment, many tasks, including bamboo strip conveying, are now automated, such as automated bamboo strip feeders. During automated bamboo strip feeding, it is necessary to identify the front and back of the bamboo strips. Currently used identification systems, as described in the background section, have an efficiency of around 99%, which is insufficient for actual production. Therefore, the applicant has developed the bamboo strip identification system described in this application. This reverse identification device simplifies the structure, reduces costs, and, more importantly, improves the efficiency of identifying the front and back of bamboo strips. In this embodiment, it includes a support 1, which can be a welded frame, connected by connecting screws as shown in the accompanying drawings, or other known structures. A bamboo strip rotation contact mechanism is provided on the support 1, allowing it to rotate. Simultaneously, there is a reset mechanism 2 for resetting the bamboo strip rotation contact mechanism, and an electronic ruler 3 connected to the bamboo strip rotation contact mechanism. In this embodiment, the bamboo strip rotation contact mechanism and the electronic ruler 3 are rotatably connected. The electronic ruler, also known as a linear displacement sensor, can be a wire-type linear displacement sensor, a rod-type linear displacement sensor, etc. The electronic ruler is an outsourced component, such as a GEFRAN linear displacement sensor / electronic ruler, selected according to actual needs. The bamboo strip rotation contact mechanism includes at least three rotatably mounted swing contact plates 6 on the support 1. Each swing contact plate 6 is connected to one electronic ruler 3, which can be fixed as needed, either to a frame or a fixed plate. Each swing contact plate 6 can rotate independently. The number of swing contact plates 6 is generally... There are 3, 4, or 5, but at least 3. Each swing contact plate 6 is connected to an electronic ruler, and the connecting end of the corresponding electronic ruler is hinged to the swing contact plate 6. The swing contact plate 6 can be hinged to the bracket 1 via a hinge shaft 4, that is, multiple swing contact plates 6 can be hinged to a hinge shaft. In this case, the hinge shaft is fixed to the bracket 1, and each swing contact plate 6 can rotate independently. Alternatively, each hinge shaft can be used in conjunction with one swing contact plate 6 to be installed on the bracket. To enable better rotation of the swing contact plate 6, a bearing 5 that mates with the swing contact plate 6 can be provided. As in this embodiment, two side plates and two connecting studs are used to form the entire bracket. Nuts are screwed to both sides of each side plate for fixation. At the same time, the swing contact plate is installed on one of the connecting studs via a bearing 5, and nuts are provided on both sides of the bearing for limiting and fixing. Of course, spacers can also be used for limiting.

[0024] Furthermore, multiple swing contact plates 6 are installed at the same height on the bracket 1. Preferably, the swing contact plates installed on the bracket 1 are at the same height to ensure the accuracy of identification. The end of the swing contact plate 6 away from the electronic ruler 3 is provided with a bamboo strip transition contact surface 8, which is preferably an inclined surface or a rounded surface. When the bamboo strip passes through the end of the swing contact plate 6, the presence of the transition contact surface allows the bamboo strip to pass through more smoothly. The end face of the swing contact plate 6 with the transition contact surface 8 adopts a rounded surface transition.

[0025] Furthermore, the reset mechanism 2 includes a tension spring. A connecting hole 7 that mates with the tension spring is provided on the swing contact plate 6. One end of the tension spring is connected to the connecting hole, and the other end is connected to a connecting plate or connecting frame (not shown in the drawing) to achieve the reset of the swing contact plate 6. Since the specific connection position and connecting parts are determined according to the actual situation, the specific connecting plate or connecting parts are not shown in this embodiment. This will be understood by those skilled in the art. In addition, when we use a self-resetting electronic ruler, the reset mechanism 2 is a spring that comes with the electronic ruler 3, so there is no need to set an additional tension spring. For example, if we use a GEFRAN self-resetting linear displacement sensor / electronic ruler, which has a built-in reset function, then we can choose not to set an additional tension spring for reset.

[0026] Working Principle: Taking three swing contact plates 6 in conjunction with three electronic rulers as an example, we will describe the working principle of this application. The bamboo strip has two sides, one concave (a), which is recessed inwards, and the other convex (c), which is protruding outwards. Additionally, bamboo nodes (b) are present on the bamboo strip. These are the structural characteristics of the bamboo strip. During identification, when the swing contact plate 6 contacts the concave surface of the bamboo strip, it drives the electronic ruler to move. This process is as follows: when contacting one edge of the concave surface, the electronic ruler's travel is long; when contacting the bottom surface, the travel is short; and when contacting the other edge, the travel is long again. This travel can be simply summarized as long-short-long. Different travel lengths result in different electrical signals generated by the electronic ruler. These electrical signals are sent to the PLC control system in the background for judgment, specifically, the determination of two of the electronic rulers... If the electrical signals from two different rulers are consistent, the surface can be identified as concave. This is because it ensures accurate identification even in situations where bamboo joints or other parts can cause confusion. When the swing contact plate 6 contacts the convex surface of the bamboo strip, it moves the electronic ruler. The movement is as follows: when it contacts one edge of the convex surface, the electronic ruler's travel is short; when it contacts the top of the convex surface, the travel is long; and when it contacts the other edge of the convex surface, the travel is short. This travel can be summarized as short-long-short. The different travels produce different electrical signals from the electronic ruler. These signals are sent to the PLC control system for judgment. If the electrical signals from two electronic rulers are consistent, the surface can be identified as concave. This is because it ensures accurate identification even in situations where bamboo joints or other parts can cause confusion. Of course, when using a tension spring to identify the front and back of the bamboo strip, as in this embodiment, the tension spring is used to reset the swing contact plate. In practice, four or five swing contact plates can also be used in conjunction with corresponding electronic rulers for identification.

[0027] In addition, let me describe a relatively special case in the identification process: when two bamboo strips arrive at once, there are two scenarios. If the two bamboo strips arrive side-by-side, the identification method is simply two consecutive concave surfaces, two consecutive convex surfaces, or one concave surface plus one convex surface. This is equivalent to identifying two separate bamboo strips simultaneously. The measurement method is the same as for individual bamboo strips; the data obtained by measuring the concave and convex surfaces of the bamboo strips using an electronic ruler is different. Therefore, we know the convex surface (green side) and concave surface (yellow side) of the bamboo strip, thus achieving the effect of identifying the bamboo strip. However, when two bamboo strips are stacked, a thickness sensor can be added. Since the thickness of two stacked bamboo strips is different from that of a single bamboo strip, the thickness can be used to identify the stacked bamboo strips.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A device for identifying the front and back of bamboo strips, characterized in that, It includes a bracket (1), a bamboo strip rotation contact mechanism disposed on the bracket (1), a reset mechanism (2) for resetting the bamboo strip rotation contact mechanism, and an electronic ruler (3) connected to the bamboo strip rotation contact mechanism.

2. The bamboo strip front and back identification device according to claim 1, characterized in that, The bamboo strip rotating contact mechanism includes at least three swing contact plates (6) rotatably mounted on the bracket (1), and each of the swing contact plates (6) is connected to an electronic ruler (3).

3. The bamboo strip front and back identification device according to claim 2, characterized in that, The swing contact plate (6) is hinged to the bracket (1) via the hinge shaft (4).

4. The bamboo strip front and back identification device according to claim 2, characterized in that, The reset mechanism (2) includes a tension spring, and the swing contact plate (6) is provided with a connecting hole (7) that cooperates with the tension spring.

5. The bamboo strip front and back identification device according to claim 2, characterized in that, Multiple swing contact plates (6) are mounted at the same height on the bracket (1).

6. The bamboo strip front and back identification device according to claim 2, characterized in that, The reset mechanism (2) is a spring that comes with the electronic ruler (3).

7. The bamboo strip front and back identification device according to claim 1, characterized in that, The electronic ruler (3) is a rod-type linear displacement sensor.

8. The bamboo strip front and back identification device according to claim 2, characterized in that, The end of the swing contact plate (6) away from the electronic ruler (3) is provided with a bamboo strip transition contact surface (8).

9. The bamboo strip front and back identification device according to claim 3, characterized in that, The swing contact plate (6) is mounted on the hinge shaft (4) via a bearing (5).

10. The bamboo strip front and back identification device according to claim 2, characterized in that, The number of the swing contact plates (6) is 3, 4 or 5.

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