JP2006337255A - Apparatus for nondestructively determining residual agricultural chemical - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate the time required to adjust the focal point of light, maintain a constant focal length at all times, and shorten the time required to detect residual agricultural chemicals in a fruit sorting line system capable of detecting residual agricultural chemicals. <P>SOLUTION: The fruit sorting line system 1 includes a mounting stand 6 for mounting vegetables and fruits; a feeding transfer means 2 for transferring the mounting stand; and a light projection and reception part 3 for irradiating mid-infrared rays to agricultural chemical components in the surfaces of the vegetables and the fruits and detecting them by spectral analysis on their reflected light. By providing a hole part for a lower part of the mounting stand 6 and projecting and receiving light through the hole part, it is possible to detect agricultural chemical components while the vegetables and the fruits are mounted to the mounting stand. It is thereby possible to eliminate the need for the adjustment of the focal point of light for each individual since the distance from the light projection and reception part 3 to the surfaces of the vegetables and the fruits is constant and substantially shorten the time required to determine residual agricultural chemicals. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a fruit and vegetable residual pesticide determination apparatus, and more particularly, to an apparatus technology for detecting residual agricultural chemicals using an optical analysis technique while the fruit and vegetables are mounted on a mounting table.

In general, when shipping fruits and vegetables produced by each farmer, the size and weight are measured while transferring the fruits and vegetables in a fruit selection line device, and then each size or weight is measured. To sort out.
On the other hand, since the agricultural chemicals used at the time of cultivation are left in the fruits and vegetables produced in each farmhouse, it is necessary to measure the amount of residual agricultural chemicals in the fruits and vegetables.

However, in the past, pesticide residue in fruits and vegetables produced by each farm unit was measured in advance in a separate process, and only fruits and vegetables with residual pesticide values lower than the predetermined value were supplied to the fruit selection line device. . That is, the measurement of the residual agricultural chemical value in the fruits and vegetables and the sorting of the fruits and vegetables into various sizes or weights are performed separately. In this method, there is a problem that not only is inefficiency but also cost increases, and there is a high risk of damaging fruits and vegetables.
Therefore, Patent Document 1 introduces a diffuse reflection infrared spectrum method as a rapid analysis method for residual agricultural chemicals. Here, it is shown that the identification work of whether or not the fruits and vegetables satisfy the safety is possible in the distribution process of the agricultural products.

In the same field, a technique has also been proposed in which an agrochemical component on the surface of fruits and vegetables is irradiated with mid-infrared rays and detected by spectral analysis of the reflected light.
Here, a more specific selection line device is introduced. That is, a large number of fruits and vegetables of the same varieties produced by each farm are taken as a unit, and the fruits and vegetables in this unit are fed and transferred to the fruit selection line device in a state of being arranged in a line by the feeding and transferring means. The above-mentioned residual pesticide detection is carried out by using some of the fruits and vegetables in the unit at the beginning in the transfer direction as sample fruits and vegetables.
Further, in the fruit selection line device, a method for measuring the residual pesticide value in a state in which the speed of feeding and transporting to the fruit selection line device is reduced, or a measurement transfer means arranged in parallel with the fruit selection line device. Attempts have been made to improve measurement accuracy and work efficiency, including methods for detecting pesticide residues.
JP 2004-325135 A

However, judging the residual pesticides for many of the same varieties using only the above-mentioned samples cannot be said to guarantee the quality of the fruits and vegetables. desirable.
Here, if the pesticide residue is determined for all the fruits and vegetables to be shipped, in the fruit selection line device capable of detecting residual pesticides, the distance between the optical analyzer that projects and receives mid-infrared light and the fruits and vegetables changes for each individual. Therefore, it is desired to solve the problem that takes time to adjust the focus of light.
In addition, the distance between the optical analyzer and the fruit or vegetable, that is, the focal length, affects the spectral analysis that determines the standard for the residual pesticide value, and must always be constant.
Therefore, the problem to be solved is to eliminate the time for adjusting the focus of light in the selection line device capable of detecting the residual pesticide, and to reduce the time for detecting the residual pesticide by always keeping the focal length constant.

  The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.

  That is, in claim 1, a mounting table for mounting fruits and vegetables, means for transferring the mounting table, and agrochemical components on the surface of the fruits and vegetables are irradiated with mid-infrared rays and detected by spectral analysis of the reflected light In the fruit selection line device provided with a light projecting / receiving unit, a hole is provided in the lower part of the mounting table, the light is received and received from the hole, and the agricultural chemical component is detected while the fruits and vegetables are mounted on the mounting table. It is possible.

  In Claim 2, the mounting base which mounts fruit and vegetables, the means to transfer this mounting base, the agricultural chemical component in the surface of this fruit and vegetables are irradiated to this, and the infrared rays are irradiated to this, and it detects by the spectrum analysis of the reflected light. In the fruit selection line device provided with a light receiving part, it is provided with a placing table position-regulating means for maintaining a constant distance between the surface of the fruit and vegetables and the light receiving and receiving part, and the agricultural chemical is left on the placing table with the fruit and vegetables being placed. The component can be detected.

  As effects of the present invention, the following effects can be obtained.

In claim 1, since the distance from the optical analyzer to the surface of the fruits and vegetables is constant, it is possible to eliminate the focus adjustment of light for each individual, and the time required for determining the residual pesticide can be remarkably shortened. Moreover, since the focal length is always constant, the spectrum analysis can accurately determine the residual pesticide.
And since this requires a determination time in the residual pesticide determination device, only a part of the fruits and vegetables of the same variety to be transferred is determined as a sample, and the remaining determination is the same as the conventional determination method. On the other hand, it shows that all fruits and vegetables can be determined as residual agricultural chemicals, leading to improved quality of fruits and vegetables to be shipped.

  In the second aspect of the present invention, the same effect as in the first aspect can be obtained only by providing a mechanism for keeping the distance between the simple fruit and fruit surface and the light projecting / receiving unit constant in the existing fruit selection line device.

Next, embodiments of the invention will be described.
FIG. 1 is a side view showing an outline of a non-destructive pesticide residue determination apparatus according to Example 1 of the present invention, FIG. 2 (a) is a plan view of a mounting table according to an embodiment of the present invention, and FIG. Similarly, FIG. 3 is a plan view showing an outline of a residual pesticide nondestructive determination apparatus according to Example 2.

A first embodiment of the present invention will be described with reference to FIGS.
Here, the fruit selection line device 1 measures, for example, the size and weight while transferring a large number of fruits and vegetables such as vegetables or fruits, and then sorts them according to various sizes or weights. In the figure, only a part thereof is shown. Further, the feeding transfer means 2 bears a transfer means for the fruits and vegetables 6 placed on the mounting table 5, and the arrow A in the drawing is the traveling direction.

Here, the sending and transferring means 2 irradiates the fruit and vegetables 6 being transferred with mid-infrared rays from the light projecting / receiving unit 3 (arrow A in the figure), and the reflected light (arrow B in the figure) is sent to the light projecting / receiving unit. After the absorption at 3, the control unit 4 performs spectrum analysis to detect the type and amount of residual agricultural chemicals for all the fruits and vegetables to be transferred.
Here, in the spectrum analysis, the type of pesticide is determined by comparing the spectrum distribution of the reflected light with the peak distribution for each type of pesticide, and the residual pesticide value is determined by the maximum peak value in the spectrum distribution. To ask.

In addition, it should be noted that the above-described projecting and receiving unit 3 emits the mid-infrared ray (arrow A in the figure) and reflects (arrow B in the figure) from below the feeding and transferring means 2 and is detected from above. In this case, the measurement distance varies depending on the size and orientation of the fruits and vegetables and a detection error occurs. However, in the present invention, the distance between the bottom of the fruits and the light projecting / receiving unit 3 is always constant, and the detection error occurs. The error is also reduced. And in order to irradiate the mid-infrared rays to the fruits and vegetables from the lower side, the feeding and transferring means 2 is provided with a hole.
On the other hand, the mode of the mounting tray 5 will be described. The entire mounting tray 5 is made of a highly rigid material such as resin. The dish surface 12 on which the fruits and vegetables 6 are placed is made of a low-rigidity material such as silicon or rubber, and the bottom 13 at the bottom of the dish surface 12 is injected with a gel agent or the like that softens absorption. These structures prevent damage to the fruits and vegetables 6 being transferred.
Here, a hole portion 11 penetrating in the vertical direction is provided in the center of the placing plate 5 described above, and irradiation light (arrow A in the drawing) and reflected light (shown in the drawing) of the above-described light projecting and receiving portion 3 are provided. Pass the middle arrow B).

In other words, the mid-infrared irradiation (arrow A in the figure) and the reflection (arrow B in the figure) by the light projecting / receiving part 3 described above are formed in the hole part of the feeding and transferring means 2 and the center of the placing plate 5 described above. Passing through the part 11, the pesticide residue is detected.
This makes the distance between the light projecting / receiving unit 3 and the lower surface of the fruits and vegetables 6 detected by the residual agricultural chemicals constant for each fruits and vegetables, and does not require light focus adjustment. Moreover, since the focal length is always constant, the spectrum analysis can accurately determine the residual pesticide.

Next, Embodiment 2 of the present invention will be described with reference to FIG.
Here, since the selection line device 1 and the spectrum analysis are the same as those in the first embodiment, detailed description thereof is omitted. In the figure, the direction of arrow A is the traveling direction. Furthermore, in Example 2, the pesticide residue is detected by performing irradiation of the middle infrared rays (arrow A in the figure) and reflection (arrow B in the figure) from the side of the fruits and vegetables 6 by the light projecting and receiving unit 3, This is a configuration that can also be seen in the existing fruit selection line device 1.

Here, before the pesticide residue is detected, that is, before passing through the light projecting and receiving unit 3, the placement tray 5 on which the fruits and vegetables 6 are placed is corrected by the position restricting means 21 in the lateral direction. The position restricting means 21 plays a role like a partition plate, and may be a simple one that can guide the mounting tray 5 to a target position in the lateral direction while being transported.
By the position restricting means 21, the horizontal positions of the mounting tray 5 are all the same, and the distance between the fruits and vegetables 6 and the light projecting and receiving unit 3 is made constant. However, a configuration in which the position restriction means 21 directly corrects the position of the product may be used. In this case, the surface on the contact side of the position restricting means 21 is made of a low friction and flexible material that does not damage the fruits and vegetables.

The side view which showed the outline of the residual agrochemical nondestructive determination apparatus which concerns on Example 1 of this invention. (A) is a top view of the mounting base which concerns on Example 1 of this invention, (b) is a top view similarly. The top view which showed the outline of the residual agricultural chemicals nondestructive determination apparatus which concerns on Example 2. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fruit selection line apparatus 2 Feeding transfer means 3 Light projection light-receiving part 4 Control part 6 Mounting plate

Claims (2)

A mounting table for mounting fruits and vegetables, means for transferring the mounting table, and a light projecting / receiving unit that irradiates the agricultural chemical components on the surface of the fruits and vegetables with mid-infrared rays and detects the spectrum by analyzing the reflected light. In the selected fruit line device,
A hole is provided in the lower part of the mounting table, the light projecting / receiving unit is disposed below the mounting table so as to be able to irradiate upward, the light is received and received from the hole, and the fruits and vegetables are mounted on the mounting table. Non-destructive pesticide residue determination device, characterized in that the component can be detected. A mounting table for mounting fruits and vegetables, means for transferring the mounting table, and a light projecting / receiving unit that irradiates the agricultural chemical components on the surface of the fruits and vegetables with mid-infrared rays and detects the spectrum by analyzing the reflected light. In the selected fruit line device,
A placement table position regulating means for maintaining a constant distance between the fruit and vegetable surface and the light projecting and receiving unit is provided, and the light projecting and receiving unit is disposed in the vicinity of the mounting table so as to be able to irradiate the mounting table. A non-destructive pesticide residue determination device that enables the detection of pesticide components while the slag is placed.

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