CN110270517A - A kind of fruit sorting system and its method based on fluorescence detection - Google Patents

Abstract

A kind of fruit sorting system based on fluorescence detection, including pigeonholes, fluorescence detection device, implementation mechanism, conveyer belt, stepper motor, detection plate, sorting frame, control system.The system is sequentially transmitted a fruit into detection plate by conveyer belt, fruit in detection plate is sent to fluorescence detection device, conveyer belt stops, stepper motor below the detection plate of front slowly rotates a circle, it has been detected after a week by fluorescence detection device, conveyer belt continues to start, and carrying out mechanism can according to testing result be pushed to fruit in corresponding sorting frame.The present invention can effectively solve the problem of fluorescence detection device point light source can not comprehensive detection defect and solve visual detection method and can not detect fruit internal quality, the detection and sorting to fruit provide a kind of good tool.

Description

A kind of fruit sorting system and method based on fluorescence detection

technical field

The invention relates to an agricultural product quality detection and sorting system, in particular to a fruit sorting system based on fluorescence detection and a method thereof.

Background technique

With the development of fine agriculture, a large number of agricultural automation equipment has emerged, and the sorting system of fruit quality has become a focus of development. In order to improve the economic benefits and user experience of fruits, a series of fruit quality testing methods and sorting equipment have come into being. pregnancy.

Most of the existing sorting equipment only sorts according to the obtained fruit surface image information. This method cannot detect the internal quality of the fruit, and can only sort according to the appearance. Some sorting equipment adopts a point light source fluorescence detection scheme. The disadvantage of this scheme is that it cannot detect fruits in all directions and can only detect a certain part. Therefore, the detection accuracy is not high, and there are still a large number of missed detection rates. In order to solve the problems of incomplete detection and low sorting accuracy, it is necessary to design a comprehensive detection system to reduce the missed detection rate, improve the quality of high-quality fruits, and improve economic benefits and user experience.

Contents of the invention

The purpose of the present invention is to provide a novel system and method for quickly and accurately sorting fruits.

In order to realize the above-mentioned purpose of the invention, the technical scheme of the present invention is specifically as follows:

A fruit sorting system based on fluorescence detection, including a sorting table, a fluorescent detection device, a push mechanism, a conveyor belt, a sorting frame and a control system. The conveyor belt runs on the sorting table, and several rotating devices are distributed at equal intervals on the conveyor belt. A detection disc is fixed above the device, and the rotating device is used to drive the detection disc to rotate horizontally. The fluorescence detection device and several pushing mechanisms are respectively fixed on the sorting table. The device is located at the initial position, and the distance between the fluorescence detection device and the pushing mechanism and between several pushing mechanisms is the same as the distance between the rotating devices. There is a detection probe on the fluorescence detection device. The sorting frames are equally spaced and distributed parallel to the sorting table on the other side of the conveyor belt. Each sorting frame corresponds to each pushing mechanism. The conveyor belt, fluorescence detection device, pushing mechanism, and rotating device are respectively connected to the control system. The rotating device is controlled Under the control of the system, the rotation drives the detection plate to rotate one circle. The detection probe on the fluorescence detection device scans the fruits on the detection plate and transmits the scanned data to the control system. The control system judges the sorting box corresponding to the scanned fruit according to the scanned data and controls the conveyor belt. Run a certain distance to transport the scanned fruit to between the corresponding sorting box and the corresponding pushing mechanism on the other side, and then the control mechanism controls the action of the corresponding pushing mechanism to push the scanned fruit into the corresponding sorting box.

Further, the rotating device is a stepping motor, the output shaft of the stepping motor is perpendicular to the conveyor belt, and the detection disc is fixed on the output shaft of the stepping motor.

Further, the number of the pushing mechanism and the number of the sorting boxes are three respectively.

A kind of fruit sorting method based on fluorescence detection, is characterized in that, comprises the following steps:

S1: Experimentally calibrate the fluorescence characteristic model under the sugar content, water content, color and total acidity of the fruit to be sorted and establish a database;

S2: Place the fruit to be sorted on the rotating device for one rotation, and obtain the average fluorescence spectrum information of the fruit for one rotation through the detection of the fluorescence detection device;

S3: call the model in the database, bring the obtained fluorescence spectrum information into the model, and judge the quality classification of the fruit to be sorted;

S4: Deliver the fruits to be sorted to the sorting box corresponding to the grading according to the grading results.

Further, the characteristic model in the step S1 is measured at a fluorescence excitation wavelength of 365 nm.

6 Further, the step S3 specifically includes: calling the model data in the database, bringing the obtained fluorescence spectrum information into the model, and calculating the sugar content, water content, Color and total acidity, the weighted calculation results are compared with the model data to judge the quality grading of the fruit to be sorted. .

Beneficial effects of the present invention:

A fruit sorting and method based on fluorescence detection of the present invention can detect multiple internal quality indicators of fruits at the same time, and can evenly detect fruits, improve detection and classification accuracy, improve user experience, promote graded sales of fruits, and improve economic benefits .

Description of drawings

Fig. 1 is the structural representation of a kind of fruit sorting system based on fluorescence detection in the embodiment of the present invention;

Fig. 2 is a kind of work flowchart of the fruit sorting system based on fluorescence detection of the embodiment of the present invention;

In the above figure 1, 1: sorting table, 2: conveyor belt, 3: stepping motor, 4: detection disc, 5: pushing mechanism 1, 6: pushing structure 2, 7: pushing structure 3, 8: fluorescent detection device, 9: Detection probe, 10: Sorting box 1, 11: Sorting box 2, 12: Sorting box 3.

Detailed ways:

Example 1

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

In this embodiment, a fruit quality sorting system based on a fluorescence detection device includes a sorting table 1, a fluorescence detection device 8, a pushing mechanism, a conveyor belt 2, a stepping motor, a detection disc, a sorting frame, and a control system. As shown in Figure 1, a conveyor belt 2 is arranged above the middle part of the sorting table 1, and several stepping motors 3 are evenly arranged on the conveyor belt 2, and a detection disc 4 is arranged directly above each stepping motor 3 . A fluorescence detection device 8 is arranged on the upper left corner of the conveyor belt 2 , and the detection probe 9 of the fluorescence detection device 8 faces the detection disk 4 . Three pushing mechanisms are arranged on the right side of the fluorescence detection device 8 . The pushing mechanism performs corresponding operations according to the classification signal of the control system, and pushes the fruit to the corresponding sorting box. The sorting frame is arranged at the lower end of the pushing mechanism, and corresponds to one of them, and the setting distance is the same as that of the pushing mechanism and the motor 3 . The control system is arranged under the sorting table 1, and is electrically connected to the conveyor belt, the stepping motor, the fluorescent detection device and the pushing mechanism.

As shown in Figure 2, it is the execution flowchart of the present invention, at first the fruit is placed in the detection tray manually or automatically, the control system controls the operation of the conveyor belt 2, and when the fluorescent detection device 8 detects that there is fruit directly ahead, the conveyor belt 2 stop running, the stepping motor 3 directly in front of the fluorescence detection device 8 slowly rotates one circle, the fluorescence detection device 8 transmits the detected data to the control system, and the control system transmits the classification signal of the fruit to the pushing mechanism, and the pushing mechanism executes the corresponding action according to the signal. The operation pushes the fruit to the corresponding sorting box to complete a sorting operation. The system continues to cycle according to the steps described above until the system is shut down.

The present invention also proposes a classification method based on a fluorescence detection device, comprising the following steps:

Step 1: Before the measurement, experimentally calibrate the fluorescence characteristic models of several kinds of fruits with different sugar content, water content, color and total acidity. Apple samples are irradiated by a unique excitation light source, and the reflected fluorescence spectral signals are received by the detection probe. After measuring 50 groups of samples, all spectral signals are removed by the SG algorithm. , color and total acidity were model-fitted with the characteristic spectrum, and weighted calculations were carried out on the sugar content, water content, color and total acidity of 50 groups of apple samples with a ratio of 4:3:2:1, and the results were divided into 2 standards on average , to classify the results into 3 categories. For calibration, Brix, Moisture, Color and Total Acidity are determined by other existing instruments.

Step 2: adopt the above-mentioned steps to measure the model of various fruits, and set up a database;

Step 3: Set the fruit information before detection, place the fruit in the detection plate, and obtain the average fluorescence spectrum information of one week after detection by the fluorescence detection device for one week;

Step 4: Call the model in the database, bring the fluorescence spectrum information into the model, and obtain the sugar content, water content, color and total acidity of the fruit;

Step 5: Calculate the sugar content, water content, color and total acidity of the fruit weighted according to the ratio of 4:3:2:1, and divide the data according to the two division standards of a certain fruit in the database;

Step 6: Send the division result to the pushing mechanism for sorting.

The above embodiments are only used to illustrate the design concept and characteristics of the present invention, and its purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. The protection scope of the present invention is not limited to the above embodiments. Therefore, all equivalent changes or modifications based on the principles and design ideas disclosed in the present invention are within the protection scope of the present invention.

Claims (6)

1. A fruit sorting system based on fluorescence detection, characterized in that it comprises a sorting table, a fluorescent detection device, a push mechanism, a conveyor belt, a sorting frame and a control system, the conveyor belt runs on the sorting table, and the conveyor belt is equidistant A number of rotating devices are distributed, and the detection disc is fixed above the rotating device. The rotating device is used to drive the detection disc to rotate horizontally. The fluorescence detection device and several pushing mechanisms are respectively fixed on the sorting table. On one side of the conveyor belt, the fluorescence detection device is located at the initial position, and the distance between the fluorescence detection device and the pushing mechanism and between several pushing mechanisms is the same as the distance between the rotating devices. There is a detection probe on the fluorescence detection device, and the detection probe faces the detection disk A number of sorting boxes are equally spaced and distributed parallel to the sorting table on the other side of the conveyor belt. Each sorting box corresponds to each pushing mechanism one by one. Connected, the rotating device rotates under the control of the control system to drive the detection plate to rotate one circle, the detection probe on the fluorescence detection device scans the fruit on the detection plate and transmits the scanning data to the control system, and the control system judges the corresponding fruit corresponding to the scanned fruit according to the scanning data. The sorting box controls the conveyor belt to run for a certain distance to transport the scanned fruit between the corresponding sorting box and the corresponding pushing mechanism on the other side, and then the control mechanism controls the action of the corresponding pushing mechanism to push the scanned fruit into the corresponding sorting box. 2. A kind of fruit sorting system based on fluorescence detection according to claim 1, wherein the rotating device is a stepping motor, the output shaft of the stepping motor is perpendicular to the conveyor belt, and the detection disc is fixed on the stepper. into the motor output shaft. 3 . The fruit sorting system based on fluorescence detection according to claim 1 , wherein the numbers of the pushing mechanism and the sorting frames are three respectively. 4 . 4. a kind of fruit sorting method based on fluorescence detection, is characterized in that, comprises the following steps: S1: Experimentally calibrate the fluorescence characteristic model under the sugar content, water content, color and total acidity of the fruit to be sorted and establish a database; S2: Place the fruit to be sorted on the rotating device for one rotation, and obtain the average fluorescence spectrum information of the fruit for one rotation through the detection of the fluorescence detection device; S3: call the model in the database, bring the obtained fluorescence spectrum information into the model, and judge the quality classification of the fruit to be sorted; S4: Deliver the fruits to be sorted to the sorting box corresponding to the grading according to the grading results. 5. A method for sorting fruits based on fluorescence detection according to claim 4, characterized in that the characteristic model in the step S1 is measured at a fluorescence excitation wavelength of 365nm. 6. A kind of fruit sorting method based on fluorescence detection according to claim 4, it is characterized in that, described step S3 specifically comprises: call the model data in the database, the fluorescent spectrum information that will obtain is brought into the model, Calculate the sugar content, water content, color and total acidity of the fruit according to the weight ratio of 4:3:2:1, compare the weighted calculation results with the model data, and judge the quality classification of the fruit to be sorted.