Detection methods for measuring the length and width of zongzi leaves

Abstract

A method for detecting the length and width of zongzi leaves involves continuously conveying the zongzi leaves to be tested using a feeding belt. The zongzi leaves on the feeding belt are single and spaced apart, placed along the conveying direction. When the zongzi leaves are conveyed to the anti-slip belt, the anti-slip belt and the feeding belt work together to clamp and convey the zongzi leaves. When the zongzi leaves reach the first straightening baffle, the edges of the zongzi leaves curl up towards the center, and the first and second baffles work together to straighten the zongzi leaves. As the zongzi leaves continue to be transported and pass through the second and third straightening baffles, the zongzi leaves gradually return to their natural state. The straightening baffle device straightens the zongzi leaves by squeezing and concentrating them and then releasing them again. The width of the zongzi leaves is measured using a rectangular fiber optic probe. The length of the zongzi leaves is calculated by detecting the time it takes for a single zongzi leaf to pass through the rectangular fiber optic probe and the speed at which the zongzi leaves are conveyed.

Description

[0001] This invention is a divisional application of "Detection device and detection method for detecting the length and width of zongzi leaves" (application number: 2021112350788; application date: 2021-10-22). Technical Field

[0002] This invention belongs to the field of quality screening technology for zongzi leaves, and specifically relates to a detection method for detecting the length and width of zongzi leaves. Background Technology

[0003] In the production of zongzi (sticky rice dumplings), bamboo leaves are an indispensable raw material. Zongzi production is time-sensitive, with high demand during specific periods. To date, there is no good bamboo leaf quality screening device (quality screening includes screening the length and width of bamboo leaves) to improve the efficiency of bamboo leaf screening. Currently, most bamboo leaf screening is done manually, resulting in low automation of bamboo leaf sorting, high labor intensity, and thus affecting the production efficiency of zongzi. Summary of the Invention

[0004] In view of the technical problems existing in the background art, the detection method for detecting the length and width of zongzi leaves provided by the present invention uses a regular baffle device to straighten the zongzi leaves before measuring them with a rectangular optical fiber detection device, which improves the detection accuracy and reduces the labor intensity of manual labor.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A method for detecting the length and width of zongzi leaves employs a device for detecting the length and width of zongzi leaves. The device for detecting the length and width of zongzi leaves includes a regularizing baffle device (1), a size detection device, a first feeding conveyor belt (21), and a second feeding conveyor belt (22). The detection method is as follows: S1: The zongzi leaves to be tested are continuously conveyed by the feed belt (5). The zongzi leaves on the feed belt (5) are single and spaced apart, and the zongzi leaves are placed in the direction of conveying. S2: When the bamboo leaves are conveyed to the anti-slip belt (6), the anti-slip belt (6) and the feeding belt (5) work together to clamp and convey the bamboo leaves; S3: When the bamboo leaf reaches the first regularizing baffle, since the width of the regularizing opening (11.3) of the first regularizing baffle is smaller than the width of the reference bamboo leaf, when the bamboo leaf passes through the regularizing opening (11.3), the edge of the bamboo leaf will roll up towards the center. At the same time, the first baffle (11.1) and the second baffle (11.2) work together to straighten the bamboo leaf. S4: When the bamboo leaves continue to be transported and pass through the second and third regularizing baffles, the bamboo leaves gradually return to their natural state due to their own elasticity; the regularizing baffle device (1) regularizes the bamboo leaves by squeezing and concentrating them and then releasing them again, so that the position of the bamboo leaves remains parallel to the transport direction. S5: When the zongzi leaf passes through the rectangular optical fiber detection device (3), the width of the zongzi leaf is measured using the rectangular optical fiber probe; S6: The length of the zongzi leaf is calculated by using a rectangular fiber optic probe to detect the time it takes for a single zongzi leaf to pass through the probe and the speed at which the leaf is transported.

[0006] Preferably, in step S5: the width of the zongzi leaf is measured using multiple pairs of rectangular fiber optic probes, and the average value of multiple sets of data is taken as the final width detection value.

[0007] Preferably, a detection gap is provided between the first feeding conveyor belt (21) and the second feeding conveyor belt (22), and a size detection device is provided at the detection gap; a regular baffle device (1) is provided above the first feeding conveyor belt (21), the regular baffle device includes multiple sets of regular baffle components (11), each set of regular baffle components (11) includes a first baffle (11.1) and a second baffle (11.2), a regular opening (11.3) is provided between the first baffle (11.1) and the second baffle (11.2), and the width of the regular opening (11.3) of the multiple sets of regular baffle components (11) gradually widens along the conveying direction of the zongzi leaves; The regular baffle component (11) includes at least three sets, with the first baffle (11.1) and the second baffle (11.2) forming a trumpet-shaped regular channel; The regularizing baffle (11) includes a first regularizing baffle, a second regularizing baffle and a third regularizing baffle. The first regularizing baffle, the second regularizing baffle and the third regularizing baffle are arranged in the direction of conveying the zongzi leaves. The width of the regularizing opening (11.3) of the first regularizing baffle is less than the width of the reference zongzi leaf, and the width of the regularizing opening (11.3) of the third regularizing baffle is equal to the width of the reference zongzi leaf.

[0008] Preferably, the input end of the first feeding conveyor belt (21) is provided with a feeding belt (5), and an anti-slip belt (6) is provided above the feeding belt (5). The feeding belt (5) and the anti-slip belt (6) work together to transport the zongzi leaves to the first feeding conveyor belt (21).

[0009] Preferably, the distance between the anti-slip belt (6) and the first feeding conveyor belt (21) is less than the reference length of the zongzi leaf.

[0010] Preferably, the size detection device is a rectangular optical fiber detection device (3), which includes at least a pair of rectangular optical fiber probes, which are respectively set at the upper and lower ends of the detection gap.

[0011] This patent can achieve the following beneficial effects: This invention proposes an automated detection device for measuring the quality parameters of zongzi leaves. Before measuring the leaves using a rectangular fiber optic detection device, a straightening baffle device is used to align the leaves, improving detection accuracy. Due to the relatively soft nature of zongzi leaves, traditional straightening methods cannot meet the detection requirements; the leaf's orientation is difficult to control, resulting in poor straightening effect and slow speed. This invention utilizes a first straightening baffle to roll and compress the zongzi leaf, narrowing its width and increasing its toughness. After quickly passing through the first straightening baffle, the leaf gradually returns to its natural state. The first, second, and third straightening baffles work together to provide positioning, thus ensuring the leaf is properly aligned. In contrast, traditional workpiece straightening methods typically involve setting the width of the straightening openings of the first, second, and third straightening baffles to gradually decrease. This method is only suitable for workpieces with high hardness and is not suitable for straightening zongzi leaves. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a flowchart illustrating the detection method for detecting the length and width of zongzi leaves according to the present invention. Figure 1 ; Figure 2 This is a flowchart illustrating the detection method for detecting the length and width of zongzi leaves according to the present invention. Figure 2 ; Figure 3 This is a flowchart illustrating the detection method for detecting the length and width of zongzi leaves according to the present invention. Figure 3 ; Figure 4 This is a flowchart illustrating the detection method for detecting the length and width of zongzi leaves according to the present invention. Figure 4 ; Figure 5 This is a diagram illustrating the combined effect of the feed belt and anti-slip belt of the device for detecting the length and width of zongzi leaves in this invention. Figure 6 This is a connection diagram of the first feeding conveyor belt, the second feeding conveyor belt, the rectangular optical fiber detection device, and the fixed support frame of the device for detecting the length and width of zongzi leaves according to the present invention.

[0013] In the figure: 1. Regularizing baffle device, 11. Regularizing baffle component, 11.1. First baffle, 11.2. Regularizing opening, 11.3. First feeding conveyor belt, 21. Second feeding conveyor belt, 22. Rectangular fiber optic detection device, 3. Fixed support frame, 4. Feeding belt, 5. Anti-slip belt, 6. Zongzi leaf, 7. Detailed Implementation Preferred solutions include Figures 1 to 6 As shown, a method for detecting the length and width of zongzi leaves employs a device for detecting the length and width of zongzi leaves. The specific structure of the device for detecting the length and width of zongzi leaves is as follows: The device for detecting the length and width of zongzi leaves includes a first feeding conveyor belt 21, a second feeding conveyor belt 22, and a size detection device. A detection gap is provided between the first and second feeding conveyor belts 21 and 22, and the size detection device is located at this gap. A leveling baffle device 1 is installed above the first feeding conveyor belt 21. This leveling baffle device includes multiple sets of leveling baffle components 11. Each set of leveling baffle components 11 includes a first baffle 11.1 and a second baffle 11.2. A leveling opening 11.3 is provided between the first baffle 11.1 and the second baffle 11.2. The width of the leveling opening 11.3 of the multiple sets of leveling baffle components 11 gradually widens along the zongzi leaf conveying direction. Since the zongzi leaves on the conveyor belts are placed manually, and their placement direction is roughly towards the conveyor belt's conveying direction, it is not possible to achieve perfect alignment with the conveying direction. Without the leveling baffle device 1, the measurement error of the size detection device is relatively large. The conveyor belts include the first feeding conveyor belt 21, the second feeding conveyor belt 22, and the feed belt 5. The aligning baffle 11 is fixed on the support of the conveyor belt, and the lower edge of the aligning baffle 11 is in contact with the upper surface of the conveyor belt.

[0014] Furthermore, the aligning baffle 11 includes at least three sets, with the first baffle 11.1 and the second baffle 11.2 forming a trumpet-shaped aligning channel. The opening size of the trumpet-shaped aligning channel gradually narrows along the conveying direction.

[0015] Furthermore, the straightening baffle 11 includes a first straightening baffle, a second straightening baffle, and a third straightening baffle, which are arranged according to the direction of the bamboo leaf conveying. The width of the straightening opening 11.3 of the first straightening baffle is less than the width of the reference bamboo leaf, and the width of the straightening opening 11.3 of the third straightening baffle is equal to the width of the reference bamboo leaf. The reference bamboo leaf width is a standard bamboo leaf width selected manually, which is set manually according to the requirements of selecting bamboo leaves. Preferably, the width of the straightening opening 11.3 of the first straightening baffle is less than 0.5 times the width of the straightening opening 11.3 of the third straightening baffle. If the bamboo leaf is not squeezed and straightened, when the bamboo leaf enters the straightening opening 11.3, the bamboo leaf itself is relatively soft, the straightening direction is difficult to control, the straightening effect is poor, and the speed is slow. The most significant technical improvement in this solution is that the first regulating baffle is used to roll and compress the bamboo leaves, narrowing their width and increasing their toughness. After quickly passing through the first regulating baffle, the bamboo leaves gradually return to their natural state. The first, second, and third regulating baffles work together to position the bamboo leaves correctly. In contrast, traditional workpiece regulating methods would set the width of the regulating openings 11.3 of the first, second, and third regulating baffles to gradually decrease. This method is only suitable for workpieces with high hardness and is not suitable for regulating bamboo leaves.

[0016] Preferably, the first baffle 11.1 and the second baffle 11.2 are set in an inclined state, with the angle between the first baffle 11.1 and the second baffle 11.2 and the horizontal plane being approximately 45°. This allows the bamboo leaf to roll upwards along the inclined surfaces of the first baffle 11.1 and the second baffle 11.2. When the bamboo leaf is completely inside the area of ​​the first, second, and third regularizing baffles, the bamboo leaf returns to its original shape due to its own elasticity. Furthermore, under the positioning effect of the three regularizing openings 11.3, the bamboo leaf will automatically adjust during the unfolding process, and its final placement will match the positioning position of the three regularizing openings 11.3, thus achieving a regularizing effect.

[0017] Furthermore, the input end of the first feeding conveyor belt 21 is equipped with a feeding belt 5, and an anti-slip belt 6 is provided above the feeding belt 5. The feeding belt 5 and the anti-slip belt 6 work together to transport the bamboo leaves onto the first feeding conveyor belt 21. Because the bamboo leaves are lightweight, the friction between the bamboo leaves and the feeding belt 5 is insufficient. When the bamboo leaves pass through the straightening opening 11.3 of the first straightening baffle, slippage occurs, causing straightening failure. By using the feeding belt 5 and the anti-slip belt 6 to hold the bamboo leaves, the bamboo leaves can pass quickly through the straightening opening 11.3 of the first straightening baffle.

[0018] Furthermore, the distance between the anti-slip belt 6 and the first feeding conveyor belt 21 is less than the reference length of the bamboo leaf. This design is to ensure that the force of the feeding belt 5 and the anti-slip belt 6 can be applied to the bamboo leaf and allow the bamboo leaf to pass through the regular opening 11.3 of the first regularizing baffle.

[0019] Furthermore, the size detection device is a rectangular fiber optic detection device 3, which includes at least a pair of rectangular fiber optic probes, respectively positioned at the upper and lower ends of the detection gap. The rectangular fiber optic detection device 3 is mounted on a fixed support frame 4. The working principle of the rectangular fiber optic detection device 3 is as follows: the rectangular fiber optic probes emit strip-shaped light signals; when an object passes through the strip-shaped light area, the object blocks the light, and the length of the blocked area is the width of the object. This technical solution can utilize a fiber optic YIBOHNB sensor. In the preferred embodiment, the detection method for detecting the length and width of zongzi leaves includes the following steps: Before measuring the length and width of the bamboo leaves, a dust inspection device is used to check for dust on the bamboo leaves. Clean bamboo leaves are then used to measure the length and width.

[0020] S1: The zongzi leaves to be tested are continuously conveyed by the feeding belt 5. The zongzi leaves on the feeding belt 5 are single and spaced apart, and the zongzi leaves are placed in the direction of conveying. S2: When the bamboo leaves are conveyed to the anti-slip belt 6, the anti-slip belt 6 and the feeding belt 5 work together to clamp and convey the bamboo leaves; S3: When the bamboo leaf reaches the first straightening baffle, since the width of the straightening opening 11.3 of the first straightening baffle is smaller than the width of the reference bamboo leaf, when the bamboo leaf passes through the straightening opening 11.3, the edge of the bamboo leaf will curl up towards the center. At the same time, the first baffle 11.1 and the second baffle 11.2 work together to straighten the bamboo leaf. S4: As the bamboo leaves continue to be transported and pass through the second and third straightening baffles, the bamboo leaves gradually return to their natural state due to their own elasticity; the straightening baffle device 1 straightens the bamboo leaves by squeezing and concentrating them and then releasing them again, so that the position of the bamboo leaves remains parallel to the conveying direction. S5: When the zongzi leaf passes through the rectangular optical fiber detection device 3, the width of the zongzi leaf is measured using the rectangular optical fiber probe; Preferably, multiple pairs of rectangular fiber optic probes are used to measure the width of the zongzi leaf, and the average value of multiple sets of data is taken as the final width detection value.

[0021] S6: The length of a zongzi leaf is calculated by measuring the time it takes for a single leaf to pass through the rectangular fiber optic probe and the speed at which the leaf is transported. The speed at which the leaf is transported is known, and the time it takes for the leaf to pass through the probe is measurable; therefore, the length of the leaf is obtained by multiplying the speed by the time.

[0022] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A method for detecting the length and width of zongzi leaves, characterized in that: A device for detecting the length and width of zongzi leaves is adopted. The device for detecting the length and width of zongzi leaves includes a regularizing baffle device (1), a size detection device, a first feeding conveyor belt (21), and a second feeding conveyor belt (22). A detection gap is provided between the first feeding conveyor belt (21) and the second feeding conveyor belt (22), and a size detection device is provided at the detection gap. A regularizing baffle device (1) is provided above the first feeding conveyor belt (21). The regularizing baffle device includes three sets of regularizing baffle components (11). Each set of regularizing baffle components (11) includes a first baffle (11.1) and a second baffle (11.2). A regularizing opening (11.3) is provided between the first baffle (11.1) and the second baffle (11.2). The width of the regularizing opening (11.3) of the three sets of regularizing baffle components (11) gradually widens along the zongzi leaf conveying direction. The regular baffle component (11) includes three sets, with the first baffle (11.1) and the second baffle (11.2) forming a trumpet-shaped regular channel; The aligning baffle (11) includes a first aligning baffle, a second aligning baffle, and a third aligning baffle. The first aligning baffle, the second aligning baffle, and the third aligning baffle are arranged in the direction of conveying the zongzi leaves. The width of the aligning opening (11.3) of the first aligning baffle is less than the width of the reference zongzi leaf, and the width of the aligning opening (11.3) of the third aligning baffle is equal to the width of the reference zongzi leaf. The detection method is as follows: S1: The zongzi leaves to be tested are continuously conveyed by the feed belt (5). The zongzi leaves on the feed belt (5) are single and spaced apart, and the zongzi leaves are placed in the direction of conveying. S2: When the bamboo leaves are conveyed to the anti-slip belt (6), the anti-slip belt (6) and the feeding belt (5) work together to clamp and convey the bamboo leaves; S3: When the bamboo leaf reaches the first regularizing baffle, since the width of the regularizing opening (11.3) of the first regularizing baffle is smaller than the width of the reference bamboo leaf, when the bamboo leaf passes through the regularizing opening (11.3), the edge of the bamboo leaf will roll up towards the center. At the same time, the first baffle (11.1) and the second baffle (11.2) work together to straighten the bamboo leaf. S4: When the bamboo leaves continue to be transported and pass through the second and third regularizing baffles, the bamboo leaves gradually return to their natural state due to their own elasticity; the regularizing baffle device (1) regularizes the bamboo leaves by squeezing and concentrating them and then releasing them again, so that the position of the bamboo leaves remains parallel to the transport direction. S5: When the zongzi leaf passes through the rectangular optical fiber detection device (3), the width of the zongzi leaf is measured using the rectangular optical fiber probe; S6: The length of the zongzi leaf is calculated by using a rectangular fiber optic probe to detect the time it takes for a single zongzi leaf to pass through the probe and the speed at which the leaf is transported.

2. The detection method for detecting the length and width of zongzi leaves according to claim 1, characterized in that: In step S5: The width of the zongzi leaf is measured using multiple pairs of rectangular fiber optic probes, and the average value of multiple sets of data is taken as the final width detection value.

3. The detection method for detecting the length and width of zongzi leaves according to claim 1, characterized in that: The first feeding conveyor belt (21) has a feeding belt (5) at its input end and an anti-slip belt (6) above it. The feeding belt (5) and the anti-slip belt (6) work together to transport the zongzi leaves to the first feeding conveyor belt (21).

4. The detection method for detecting the length and width of zongzi leaves according to claim 3, characterized in that: The distance between the anti-slip belt (6) and the first feeding conveyor belt (21) is less than the reference length of the zongzi leaf.

5. The detection method for detecting the length and width of zongzi leaves according to claim 4, characterized in that: The size detection device is a rectangular fiber optic detection device (3). The rectangular fiber optic detection device (3) includes at least a pair of rectangular fiber optic probes, which are respectively set at the upper and lower ends of the detection gap.

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