A method and system for rapid quality detection of bottled milk

Abstract

The present invention relates to the technical field of milk detection, and discloses a method and system for rapid quality detection of bottled milk, the method comprising collecting multiple physical and chemical indicators and weight of bottled milk, judging whether its quality and weight are qualified, and then classifying it into qualified products or defective products; setting a standard range for each physical and chemical indicator, and comparing in real time to determine whether the bottled milk is qualified; the defective rejection strategy is executed according to the position adjustment and continuous occurrence, respectively, to ensure accurate rejection of defective products; including a transmission module, a milk detection module and a rejection device. A pressure sensor and a milk analyzer are used for weight detection and quality detection; the rejection device is composed of a push block and can work independently; a data acquisition module is used to obtain the parameters required for the rejection strategy; the system can efficiently detect the quality of bottled milk, and accurately reject defective products, thereby improving production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of milk detection, and in particular to a method and system for rapid quality detection of bottled milk. Background Art

[0002] In the bottled milk production industry, quality control has always been one of the key challenges; traditional quality inspection methods usually involve single parameters or rely on manual operations, which are at risk of inefficiency and subjective errors; these methods cannot comprehensively evaluate product quality, leading to uncertainty and instability in production line management; with the development of science and technology, people's demand for more efficient and accurate quality inspection methods is increasing; modern production lines need to integrate multiple inspection methods to ensure that product quality meets standards and improve production efficiency; integrating multiple physical and chemical indicators and weight inspection technologies has become an inevitable trend in modern quality management, but there is currently a lack of systems that comprehensively apply these technologies on the market.

[0003] With the development of automation technology, people have an increasing demand for more efficient and accurate methods of rejecting defective products. Modern production lines require fast and intelligent rejection systems that can accurately identify defective products and reject them in a timely manner to ensure the smooth production of qualified products. However, there is still a lack of systems that comprehensively apply rejection technology on the market. The current rejection technology is roughly divided into two types. One is manual rejection, which has a high error rate and low efficiency. The other is machine clamping rejection. Although this method solves the problem of low efficiency, defective products will fall during the clamping process, which will affect the transmission of qualified products. Therefore, how to successfully reject defective products while ensuring efficiency and success rate has become a major research topic in the industry. Summary of the invention

[0004] The present invention provides a method and system for quickly detecting the quality of bottled milk, which facilitates solving the problems mentioned in the above background technology.

[0005] The present invention provides the following technical solution: a method and system for rapid quality detection of bottled milk, comprising:

[0006] Collect multiple physical and chemical indicators of target bottled milk on the main conveyor belt;

[0007] The multiple physical and chemical indicators are specifically: fat, protein, lactose, non-fat solids, density, water addition rate, freezing point, ash content, milk temperature, pH and conductivity;

[0008] According to the collected physical and chemical indicators of the target bottled milk, determine whether the target bottled milk is a product of qualified quality;

[0009] Collect the weight of the target bottled milk on the main conveyor belt;

[0010] According to the collected weight of the target bottled milk, determine whether the target bottled milk is a product of qualified weight;

[0011] If the quality of the target bottled milk and the weight of the target bottled milk are both qualified, the target bottled milk will be identified as a qualified product;

[0012] If at least one of the quality of the target bottled milk and the weight of the target bottled milk is unqualified, the target bottled milk is identified as defective and is rejected according to the rejection strategy.

[0013] Optional: Based on the collected physical and chemical indicators of the target bottled milk, determine whether the target bottled milk is a qualified product, including:

[0014] For each physical and chemical indicator, set up the corresponding standard range;

[0015] Collect multiple physical and chemical indicators of the target bottled milk on the main conveyor belt as actual indicators;

[0016] For each physical and chemical index;

[0017] If the actual index is within the standard range of the corresponding physical and chemical index, this physical and chemical index will be considered qualified;

[0018] If the actual index is outside the standard range of the corresponding physical and chemical index, this physical and chemical index will be deemed unqualified;

[0019] If multiple physical and chemical indicators of bottled milk are determined to be qualified, the quality of the bottled milk is considered qualified;

[0020] If there are physical and chemical indicators among the multiple physical and chemical indicators of bottled milk that are determined to be unqualified, the quality of this bottled milk is deemed to be unqualified.

[0021] Optional: judging whether the target bottled milk is a product of qualified weight according to the collected weight of the target bottled milk includes:

[0022] Select bottled milk of qualified weight, collect the weight of the bottled milk, and use it as the standard weight, recorded as A;

[0023] Collect the weight of the target bottled milk on the main conveyor belt as the actual weight, recorded as B;

[0024] Calculate the error between the actual weight and the standard weight. The error between the actual weight and the standard weight is calculated using the following formula:

[0025] C = A-B, where C is the error between the actual weight and the standard weight, A is the standard weight, and B is the actual weight;

[0026] Set up a weight error threshold D;

[0027] If |C|≤D, the weight of the target bottled milk is deemed qualified;

[0028] If |C|>D, the weight of the target bottled milk is deemed unqualified.

[0029] Optionally, if at least one of the quality of the target bottled milk and the weight of the target bottled milk is unqualified, the target bottled milk is identified as defective and the defective product is rejected according to the rejection strategy, including:

[0030] Get the distance between the defective product and the first edge, recorded as E 1 ;

[0031] Get the width of the main conveyor belt, denoted as F;

[0032] Get the total number of push blocks in the rejection device, recorded as G;

[0033] H is the difference in extension length between two adjacent push blocks;

[0034] The extension length of the Xth push block is recorded as E X ;

[0035]

[0036] Get the conveying speed of the main conveyor belt, denoted as V;

[0037] Get the width of the push block in the rejection device, denoted as K;

[0038] The time required for each push block to extend remains the same, recorded as T;

[0039]

[0040] Optionally, if at least one of the quality of the target bottled milk and the weight of the target bottled milk is unqualified, the target bottled milk is identified as defective and the defective product is rejected according to the rejection strategy, including:

[0041] If the defective product appears alone;

[0042] Get the distance between the defective product and the entrance of the rejection device, recorded as M;

[0043] Obtain all push blocks in the rejection device, and sort the push blocks according to the conveying direction of the main conveyor belt, which is recorded as the push block order, namely the first push block, the second push block, and the Gth push block;

[0044] When M=K, the first push block in the rejection device extends;

[0045] After the first push block extends, the other push blocks in the rejection device extend in sequence at a fixed time interval, the time interval being T, until the extended length of the push block is equal to the width of the main conveyor belt;

[0046] During the rejection process, the projection surface of the defective products on the rejection device is obtained, and the projection direction of the projection surface is perpendicular to the conveying direction of the main conveyor belt;

[0047] As the defective products are transported on the main conveyor, the projection surface of the defective products on the rejection device also moves synchronously;

[0048] During the movement of defective products on the projection surface of the rejection device, if the push block covered by the projection leaves the projection coverage area, the push block is retracted.

[0049] Optionally, if at least one of the quality of the target bottled milk and the weight of the target bottled milk is unqualified, the target bottled milk is identified as defective and the defective product is rejected according to the rejection strategy, including:

[0050] If defective products appear continuously;

[0051] Each of the consecutive defective products is recorded in sequence as the first defective product, the second defective product, ... the Wth defective product in the direction opposite to the conveying direction of the main conveyor belt;

[0052] Draw an arbitrary horizontal straight line perpendicular to the first edge through the first sample, and record it as the first straight line;

[0053] Draw an arbitrary horizontal straight line perpendicular to the first edge through the Wth defective product, and record it as the second straight line;

[0054] Get the first straight line and the second straight line that are the farthest apart;

[0055] The space between the first and second straight lines, which are the farthest apart, is recorded as the space occupied by consecutive defective products;

[0056] Get the distance between each defective product and the first edge among the consecutive defective products, and select the minimum distance as Z;

[0057] Get the distance between the first product and the entrance of the rejection device, recorded as Y;

[0058] If Y=K, the first push block in the rejection device extends out, and the extension length is Z;

[0059] After the first push block extends, the other push blocks in the rejection device extend in sequence at a fixed time interval of T until the extended length of the push block is equal to the width of the main conveyor belt;

[0060] During the rejection process, the projection of the space occupied by the continuously appearing defective products on the rejection device is obtained, and the projection direction is perpendicular to the conveying direction of the main conveyor belt;

[0061] As the defective products are transported on the main conveyor, the projection of the space occupied by the continuously appearing defective products on the rejection device also moves synchronously;

[0062] During the movement of the projection of the space occupied by the continuously appearing defective products on the rejection device, if the push block covered by the projection leaves the projection coverage area, the push block is retracted.

[0063] Optional: Include:

[0064] During the rejection process, obtain the vertical downward projection of defective products on the main conveyor belt;

[0065] If the projection boundary close to the rejection device is not parallel to the inclined plane formed by the extension of the push block;

[0066] At this time, the push blocks covered by the real-time projection of the defective products on the rejection device are obtained and recorded as a push block set;

[0067] Select the push block that is the last to extend along the conveying direction of the main conveyor belt from the push block set and record it as the target push block;

[0068] Extending the target push block to push the defective products, thereby adjusting the position of the defective products on the main conveyor belt so that the projection boundary close to the rejection device is parallel to the inclined plane formed by the extension of the push blocks in the push block set before the target push block is extended;

[0069] After adjusting the position of defective products on the main conveyor belt, if the projection boundary close to the rejection device is parallel to the inclined plane formed by the extension of the push blocks in the push block set before the target push block is extended, the target push block is reset to the length before extension.

[0070] Optional: Include:

[0071] Transmission module;

[0072] The conveying module includes two conveyor belts, one of which is a main conveyor belt responsible for conveying qualified bottled milk;

[0073] The edge of the main conveyor belt closest to the reject device is recorded as the first edge;

[0074] The edge of the main conveyor belt farthest from the reject device is recorded as the second edge;

[0075] The other is a secondary conveyor belt, which has a conveying direction opposite to that of the main conveyor belt and is responsible for recycling defective products;

[0076] Milk testing module;

[0077] The milk detection module includes a pressure sensor and a milk analyzer;

[0078] The pressure sensor is used to obtain the weight of bottled milk and determine whether the weight of the bottled milk is qualified;

[0079] The milk analyzer is used to obtain multiple physical and chemical indicators of bottled milk to determine whether the quality of bottled milk is qualified;

[0080] The milk analyzer automatically cleans after obtaining multiple physical and chemical indicators of a bottle of bottled milk, ensuring that multiple physical and chemical indicators of the next bottle of bottled milk are accurate;

[0081] Rejection device;

[0082] The rejection device is composed of a plurality of push blocks, each of which has the same length and width; each push block works independently;

[0083] Data acquisition module;

[0084] Used to obtain the distance between the defective product and the first edge, the width of the main conveyor belt, the total number of push blocks in the rejection device, the conveying speed of the main conveyor belt, the width of the push blocks in the rejection device, and the distance between the defective product and the entrance of the rejection device.

[0085] The present invention has the following beneficial effects:

[0086] 1. The rapid quality detection method and system for bottled milk, during the rejection process, if the defective product is not close to the inclined surface formed by the extension of the push block, then the defective product will have excess resistance on the main conveyor belt, which may cause the defective product to get stuck during the rejection process, obtain the target push block, and continue to extend the target push block, adjust the position of the defective product on the main conveyor belt, make the projection boundary close to the rejection device parallel to the inclined surface formed by the extension of the push blocks in the push block set before the extension of the target push block, and then reset the target push block to the length before extension. No matter at what angle the defective product enters the rejection device, the angle of the defective product on the main conveyor belt can be adjusted in this way, effectively reducing the resistance of the defective product on the main conveyor belt, and completing the rejection operation more efficiently.

[0087] 2. The method and system for rapid quality detection of bottled milk: if there are unrejected defective products among the continuously appearing defective products, the push block will not be retracted after completing the rejection operation of the previous defective product. If it is retracted, it will need to be extended again when the next defective product is rejected, which will cause unnecessary operations of the rejection device. Therefore, the push block will be retracted in time after each of the continuously appearing defective products is rejected. If the push block that has completed the rejection operation is not retracted in time after each of the continuously appearing defective products is rejected, the push block that has completed the rejection operation will affect the subsequent qualified bottled milk transmitted by the main conveyor belt. The push block that is out of the projection coverage is immediately retracted. In this way, it will neither interfere with the rejection of defective products nor affect the transmission of qualified bottled milk on the main conveyor belt.

[0088] 3. In the method and system for rapid quality detection of bottled milk, the distance between each defective product and the first edge is different. The extended length of the first push block in the rejection device is determined according to the distance between each defective product and the first edge, so that the extended length of the first push block is equal to the distance between the defective product and the first edge. In this way, the rejection operation can be completed efficiently without affecting the rejection of defective products.

[0089] 4. The rapid quality detection method and system for bottled milk can accurately control the action of the push block in the rejection device by acquiring data such as the distance between the defective product and the first edge, the width of the main conveyor belt, the total number of push blocks in the rejection device, the conveying speed of the main conveyor belt, the width of the push block in the rejection device, and the distance between the defective product and the entrance of the rejection device. Regardless of whether the defective products appear alone or continuously, the rejection device can intelligently reject the defective products according to the preset rejection strategy. The independent operation and automatic reset function of the push block make the rejection process more flexible and efficient. Compared with traditional manual inspection and rejection methods, the intelligent rejection device greatly reduces labor costs and avoids errors and omissions that may be caused by manual operation, thereby improving the automation level and operating efficiency of the entire production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0090] Figure 1 It is a schematic diagram of the structure of the present invention.

[0091] Figure 2 It is a schematic diagram showing that the projection boundary near the rejection device and the inclined surface formed by the extension of the push block are not parallel to each other.

[0092] Figure 3 This is a schematic diagram of defective product position adjustment according to the present invention.

[0093] Figure 4 It is a schematic diagram of the parallel slope formed by the projection boundary close to the rejection device and the extension of the push block of the present invention. DETAILED DESCRIPTION

[0094] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0095] Example, see Figures 1 to 4 , a rapid quality detection method for bottled milk, comprising:

[0096] Collect multiple physical and chemical indicators of target bottled milk on the main conveyor belt;

[0097] The multiple physical and chemical indicators are specifically: fat, protein, lactose, non-fat solids, density, water addition rate, freezing point, ash content, milk temperature, pH and conductivity;

[0098] According to the collected physical and chemical indicators of the target bottled milk, determine whether the target bottled milk is a product of qualified quality;

[0099] Collect the weight of the target bottled milk on the main conveyor belt;

[0100] According to the collected weight of the target bottled milk, determine whether the target bottled milk is a product of qualified weight;

[0101] If the quality of the target bottled milk and the weight of the target bottled milk are both qualified, the target bottled milk will be identified as a qualified product;

[0102] If at least one of the quality and weight of the target bottled milk is unqualified, the target bottled milk will be identified as defective and will be eliminated according to the elimination strategy; at least one of the quality and weight of the target bottled milk is unqualified means the quality is unqualified, the quality is unqualified, or both the quality and the weight are unqualified; as long as one of the unqualified situations occurs, the target bottled milk will be identified as defective.

[0103] Based on the collected physical and chemical indicators of the target bottled milk, it is determined whether the target bottled milk is a qualified product, including:

[0104] For each physical and chemical indicator, set up the corresponding standard range;

[0105] Collect multiple physical and chemical indicators of the target bottled milk on the main conveyor belt as actual indicators;

[0106] For each physical and chemical index;

[0107] If the actual index is within the standard range of the corresponding physical and chemical index, this physical and chemical index will be considered qualified;

[0108] If the actual index is outside the standard range of the corresponding physical and chemical index, this physical and chemical index will be deemed unqualified;

[0109] If multiple physical and chemical indicators of bottled milk are determined to be qualified, the quality of the bottled milk is considered qualified;

[0110] If there are physical and chemical indicators that are determined to be unqualified among multiple physical and chemical indicators of bottled milk, the quality of this bottled milk is deemed to be unqualified; as long as there are unqualified physical and chemical indicators among all the physical and chemical indicators, the quality of the bottled milk is deemed to be unqualified.

[0111] The step of judging whether the target bottled milk is a product of qualified weight according to the collected weight of the target bottled milk comprises:

[0112] Select bottled milk of qualified weight, collect the weight of the bottled milk, and use it as the standard weight, recorded as A;

[0113] Collect the weight of the target bottled milk on the main conveyor belt as the actual weight, recorded as B;

[0114] Calculate the error between the actual weight and the standard weight. The error between the actual weight and the standard weight is calculated using the following formula:

[0115] C = A-B, where C is the error between the actual weight and the standard weight, A is the standard weight, and B is the actual weight;

[0116] Set up a weight error threshold D;

[0117] If |C|≤D, the weight of the target bottled milk is deemed qualified;

[0118] If |C|>D, the weight of the target bottled milk is deemed unqualified.

[0119] If at least one of the quality and weight of the target bottled milk is unqualified, the target bottled milk is identified as defective and is rejected according to a rejection strategy, including:

[0120] Get the distance between the defective product and the first edge, recorded as E 1 ; The length of the first push block in the rejection device is equal to the distance between the defective product and the first edge;

[0121] Get the width of the main conveyor belt, denoted as F;

[0122] Get the total number of push blocks in the rejection device, recorded as G;

[0123] H is the difference in extension length between two adjacent push blocks;

[0124] The extension length of the Xth push block is recorded as E X ;

[0125]

[0126] The length of each push block extending out is related to the distance between the defective product and the first edge;

[0127] The length of the first push block is equal to the distance between the defective product and the first edge. The lengths of the other push blocks are calculated by adding H to the length of the first push block in the order of the push blocks.

[0128] Get the conveying speed of the main conveyor belt, denoted as V;

[0129] Get the width of the push block in the rejection device, denoted as K;

[0130] The time required for each push block to extend remains the same, recorded as T;

[0131]

[0132] Since the conveying speed of the main conveyor belt is fixed and the width of each push block in the rejection device is also fixed, the time required for defective products to pass through each push block is equal. In order to ensure that each push block extends to the specified length within the same time interval, the extension speed of each push block is different.

[0133] If at least one of the quality and weight of the target bottled milk is unqualified, the target bottled milk is identified as defective and is rejected according to a rejection strategy, including:

[0134] If the defective product appears alone; the defective product appears alone means that the bottled milk before and after the defective product is qualified;

[0135] Get the distance between the defective product and the entrance of the rejection device, recorded as M;

[0136] Obtain all push blocks in the rejection device, and sort the push blocks according to the conveying direction of the main conveyor belt, which is recorded as the push block order, namely the first push block, the second push block, and the Gth push block;

[0137] When M=K, the first push block in the rejection device extends; when the distance between the defective product and the entrance of the rejection device is M, the first push block in the rejection device extends, and when the defective product reaches the entrance of the rejection device, the first push block in the rejection device just extends to the specified position;

[0138] After the first push block extends, the other push blocks in the rejection device extend in sequence at a fixed time interval, the time interval being T, until the extended length of the push block is equal to the width of the main conveyor belt;

[0139] For example, the distance between the defective product and the first edge is 1 cm, and the width of the main conveyor belt is 10 cm, so the first push block extends by 1 cm, the second push block extends by 2 cm, and the tenth push block extends by 10 cm. At this time, the length of the tenth push block is equal to the width of the main conveyor belt, so the push blocks after the tenth push block do not need to extend.

[0140] During the rejection process, the projection surface of the defective products on the rejection device is obtained, and the projection direction of the projection surface is perpendicular to the conveying direction of the main conveyor belt;

[0141] As the defective products are transported on the main conveyor, the projection surface of the defective products on the rejection device also moves synchronously;

[0142] During the movement of the defective product on the projection surface of the rejection device, if the push block covered by the projection leaves the projection coverage area, the push block is retracted;

[0143] If the push block that has completed the rejection operation is not recovered in time, it will affect the subsequent qualified bottled milk transmitted by the main conveyor belt. Immediately recover the push block that is out of the projection coverage. In this way, it will neither interfere with the rejection of defective products nor affect the transmission of qualified bottled milk on the main conveyor belt.

[0144] If at least one of the quality and weight of the target bottled milk is unqualified, the target bottled milk is identified as defective and is rejected according to a rejection strategy, including:

[0145] If defective products appear continuously;

[0146] Each of the consecutive defective products is recorded in sequence as the first defective product, the second defective product, ... the Wth defective product in the direction opposite to the conveying direction of the main conveyor belt;

[0147] Draw an arbitrary horizontal straight line perpendicular to the first edge through the first sample, and record it as the first straight line;

[0148] Draw an arbitrary horizontal straight line perpendicular to the first edge through the Wth defective product, and record it as the second straight line;

[0149] Get the first straight line and the second straight line that are the farthest apart;

[0150] The space between the first and second straight lines, which are the farthest apart, is recorded as the space occupied by consecutive defective products;

[0151] Get the distance between each defective product and the first edge among the consecutive defective products, and select the minimum distance as Z;

[0152] Get the distance between the first product and the entrance of the rejection device, recorded as Y;

[0153] If Y=K, the first push block in the rejection device extends out, and the extension length is Z;

[0154] Obtain the minimum distance between each defective product and the first edge among the defective products that appear continuously, and use the minimum distance as the extension length of the first push block. This method can efficiently complete the rejection operation without affecting the rejection of defective products.

[0155] After the first push block extends, the other push blocks in the rejection device extend in sequence at a fixed time interval of T until the extended length of the push block is equal to the width of the main conveyor belt;

[0156] For example: the minimum distance between each defective product and the first edge is 1 cm, and the width of the main conveyor belt is 10 cm, so the first push block extends by 1 cm, the second push block extends by 2 cm, and the tenth push block extends by 10 cm; at this time, the tenth push block extends by the same length as the width of the main conveyor belt, so the push blocks after the tenth push block do not need to extend;

[0157] During the rejection process, the projection of the space occupied by the continuously appearing defective products on the rejection device is obtained, and the projection direction is perpendicular to the conveying direction of the main conveyor belt;

[0158] As the defective products are transported on the main conveyor, the projection of the space occupied by the continuously appearing defective products on the rejection device also moves synchronously;

[0159] During the movement of the projection of the space occupied by the continuously appearing defective products on the rejection device, if the push block covered by the projection leaves the projection coverage area, the push block is retracted;

[0160] If there are defective products that have not been completely rejected among the defective products that appear continuously, the push block will not be retracted after completing the rejection operation of the previous defective product. If it is retracted, it will need to be extended again when the next defective product is rejected, resulting in a waste of resources. Therefore, the push block should be retracted in time after each of the defective products that appear continuously has been rejected.

[0161] After each of the consecutive defective products is rejected, if the push block that has completed the rejection operation is not retracted in time, the push block that has completed the rejection operation will affect the subsequent transmission of qualified bottled milk on the main conveyor belt. The push block that is out of the projection coverage is immediately retracted. In this way, it will neither interfere with the rejection of defective products nor affect the transmission of qualified bottled milk on the main conveyor belt.

[0162] include:

[0163] During the rejection process, obtain the vertical downward projection of defective products on the main conveyor belt;

[0164] If the projection boundary near the rejection device is not parallel to the inclined plane formed by the push block, refer to Figure 2 ;

[0165] At this time, the push blocks covered by the real-time projection of the defective products on the rejection device are obtained and recorded as a push block set;

[0166] Select the push block that is the last to extend along the conveying direction of the main conveyor belt from the push block set and record it as the target push block;

[0167] Extend the target push block to push the defective products, thereby adjusting the position of the defective products on the main conveyor belt so that the projection boundary close to the rejection device is parallel to the inclined plane formed by the push blocks in the push block set before the target push block is extended. Figure 3 ;

[0168] After adjusting the position of the defective product on the main conveyor, if the projection boundary close to the rejection device is parallel to the inclined plane formed by the extension of the push block in the push block set before the target push block is extended, the target push block is reset to the length before extension, and the reference Figure 4 ;

[0169] During the rejection process, if the defective products are not close to the inclined plane formed by the extension of the push block, there will be excess resistance on the main conveyor belt, which may cause the defective products to get stuck during the rejection process. The target push block is obtained and continues to be extended. The position of the defective products on the main conveyor belt is adjusted so that the projection boundary close to the rejection device is parallel to the inclined plane formed by the extension of the push blocks in the push block set before the extension of the target push block. The target push block is then reset to the length before extension. No matter at what angle the defective products enter the rejection device, the angle of the defective products on the main conveyor belt can be adjusted in this way, effectively reducing the resistance of the defective products on the main conveyor belt and completing the rejection operation more efficiently.

[0170] include:

[0171] Transmission module;

[0172] The conveying module includes two conveyor belts, one of which is a main conveyor belt responsible for conveying qualified bottled milk;

[0173] The edge of the main conveyor belt closest to the reject device is recorded as the first edge;

[0174] The edge of the main conveyor belt farthest from the reject device is recorded as the second edge;

[0175] The other is the secondary conveyor belt, which has the opposite conveying direction to the main conveyor belt and is responsible for recycling defective products. Figure 1 ;

[0176] Milk testing module;

[0177] The milk detection module includes a pressure sensor and a milk analyzer;

[0178] The pressure sensor is used to obtain the weight of bottled milk and determine whether the weight of the bottled milk is qualified;

[0179] The milk analyzer is used to obtain multiple physical and chemical indicators of bottled milk to determine whether the quality of bottled milk is qualified;

[0180] The milk analyzer automatically cleans after obtaining multiple physical and chemical indicators of a bottle of bottled milk, ensuring that multiple physical and chemical indicators of the next bottle of bottled milk are accurate;

[0181] Rejection device;

[0182] The rejection device is composed of a plurality of push blocks, each of which has the same length and width; each push block works independently;

[0183] Data acquisition module;

[0184] Used to obtain the distance between the defective product and the first edge, the width of the main conveyor belt, the total number of push blocks in the rejection device, the conveying speed of the main conveyor belt, the width of the push blocks in the rejection device, and the distance between the defective product and the entrance of the rejection device.

[0185] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0186] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for rapid quality detection of bottled milk, characterized in that: include: Collect multiple physical and chemical indicators of target bottled milk on the main conveyor belt; The multiple physical and chemical indicators are specifically: fat, protein, lactose, density, water addition rate, freezing point, ash content, milk temperature, pH and conductivity; According to the collected physical and chemical indicators of the target bottled milk, determine whether the target bottled milk is a product of qualified quality; Collect the weight of the target bottled milk on the main conveyor belt; According to the collected weight of the target bottled milk, it is judged whether the target bottled milk is a product of qualified weight, including: Select bottled milk of qualified weight, collect the weight of the bottled milk, and use it as the standard weight, recorded as A; Collect the weight of the target bottled milk on the main conveyor belt as the actual weight, recorded as B; Calculate the error between the actual weight and the standard weight. The error between the actual weight and the standard weight is calculated using the following formula: , where C is the error between the actual weight and the standard weight, A is the standard weight, and B is the actual weight; Set up a weight error threshold D; If |C| D, the weight of the target bottled milk is deemed qualified; If |C| D, the weight of the target bottled milk is deemed unqualified; If the quality of the target bottled milk and the weight of the target bottled milk are both qualified, the target bottled milk will be identified as a qualified product; If at least one of the target bottled milk quality and the target bottled milk weight is unqualified, the target bottled milk will be identified as defective and rejected according to the rejection strategy, including: Get the distance between the defective product and the first edge, recorded as ; Get the width of the main conveyor belt, denoted as F; Get the total number of push blocks in the rejection device, recorded as G; ; H is the difference in extension length between two adjacent push blocks; The extension length of the Xth push block is recorded as ; ； Get the conveying speed of the main conveyor belt, denoted as V; Get the width of the push block in the rejection device, denoted as K; The time required for each push block to extend remains the same, recorded as T; ； If the defective product appears alone; Get the distance between the defective product and the entrance of the rejection device, recorded as M; Obtain all push blocks in the rejection device, and sort the push blocks according to the conveying direction of the main conveyor belt, which is recorded as the push block order, namely the first push block, the second push block, and the Gth push block; When M=K, the first push block in the rejection device extends; After the first push block extends, the other push blocks in the rejection device extend in sequence at a fixed time interval, the time interval being T, until the extended length of the push block is equal to the width of the main conveyor belt; During the rejection process, the projection surface of the defective products on the rejection device is obtained, and the projection direction of the projection surface is perpendicular to the conveying direction of the main conveyor belt; As the defective products are transported on the main conveyor, the projection surface of the defective products on the rejection device also moves synchronously; During the movement of the defective product on the projection surface of the rejection device, if the push block covered by the projection leaves the projection coverage area, the push block is retracted; If defective products appear continuously; Each of the consecutive defective products is recorded in sequence as the first defective product, the second defective product, ... the Wth defective product in the direction opposite to the conveying direction of the main conveyor belt; Draw an arbitrary horizontal straight line perpendicular to the first edge through the first sample, and record it as the first straight line; Draw an arbitrary horizontal straight line perpendicular to the first edge through the Wth defective product, and record it as the second straight line; Get the first straight line and the second straight line that are the farthest apart; The space between the first and second straight lines, which are the farthest apart, is recorded as the space occupied by consecutive defective products; Get the distance between each defective product and the first edge among the consecutive defective products, and select the minimum distance as Z; Get the distance between the first product and the entrance of the rejection device, recorded as Y; If Y=K, the first push block in the rejection device extends out, and the extension length is Z; After the first push block extends, the other push blocks in the rejection device extend in sequence at a fixed time interval of T until the extended length of the push block is equal to the width of the main conveyor belt; During the rejection process, the projection of the space occupied by the continuously appearing defective products on the rejection device is obtained, and the projection direction is perpendicular to the conveying direction of the main conveyor belt; As the defective products are transported on the main conveyor, the projection of the space occupied by the continuously appearing defective products on the rejection device also moves synchronously; During the movement of the projection of the space occupied by the continuously appearing defective products on the rejection device, if the push block covered by the projection leaves the projection coverage area, the push block is retracted; During the rejection process, obtain the vertical downward projection of defective products on the main conveyor belt; If the projection boundary close to the rejection device is not parallel to the inclined plane formed by the extension of the push block; At this time, the push blocks covered by the real-time projection of the defective products on the rejection device are obtained and recorded as a push block set; The push block that is last extended along the conveying direction of the main conveyor belt in the push block set is selected and recorded as the target push block; Extending the target push block to push the defective products, thereby adjusting the position of the defective products on the main conveyor belt so that the projection boundary close to the rejection device is parallel to the inclined plane formed by the extension of the push blocks in the push block set before the target push block is extended; After adjusting the position of defective products on the main conveyor belt, if the projection boundary close to the rejection device is parallel to the inclined plane formed by the extension of the push blocks in the push block set before the target push block is extended, the target push block is reset to the length before extension.

Images