JP2007333595A - Residual agricultural chemical detecting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a residual agricultural chemical detecting device, knowing whether or not the value of residual agricultural chemical in the process of detection is influenced by disturbance, and/or preventing the detection work from being continued in the state of being influenced by disturbance, and simple in structure. <P>SOLUTION: This residual agricultural chemicals detecting device 1 includes an irradiating part 2 and a light receiving part 3, wherein infrared rays detected by the light receiving part 2 is spectrum-analyzed to detect residual agricultural chemicals of a specimen T. The device includes a foreign matter detecting sensor 4 for detecting entering foreign matter P to detection areas L1, L2, wherein when entering of foreign matter P to the detection areas L1 L2 by the foreign matter detecting sensor 4, a warning is generated and/or irradiation of light from the irradiating part 2 to the specimen T is suspended. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a residual pesticide detection apparatus for detecting residual pesticides on the outer surface of an object to be detected such as fruits and vegetables.

  There has been proposed a residual pesticide detection apparatus that detects residual pesticides on the outer surface of fruits and vegetables by irradiating the fruits and vegetables with mid-infrared rays and spectrally analyzing the reflected light (see, for example, Patent Document 1).

  This conventional residual pesticide detection apparatus is useful in that it can detect residual pesticides efficiently without causing damage to the fruits and vegetables, because it can detect the residual pesticides of fruits and vegetables without contact, There was room for improvement in terms of detection accuracy.

  That is, the residual pesticide detection apparatus described in Patent Document 1 includes an irradiation unit that emits mid-infrared rays toward fruits and vegetables, and a light receiving unit that receives reflected light from the fruits and vegetables, and is received by the light receiving unit. Based on the spectral analysis of the reflected light, the type and residual value of the pesticide on the surface of the fruit and vegetable are determined.

By the way, in such a residual pesticide detection device, when a foreign substance enters the light irradiation path from the irradiation unit or the light reflection path from the fruits and vegetables to the light receiving unit, the residual pesticide cannot be detected normally.
However, in the conventional residual pesticide detection apparatus, sufficient consideration has not been made for such a viewpoint, and it has not been possible to confirm whether or not the detected value has been normally detected.

  In some cases, it is necessary to change the posture of the fruits and vegetables at the irradiation position by the irradiation unit. In the case where an infrared laser light source is used as the irradiating unit, when performing the work, in addition to the generation of detection errors caused by the worker, be careful not to irradiate the laser beam to the worker himself. Need to do work. In particular, when it is necessary to work with the face close to the irradiation position, there may be a problem that laser light is irradiated to the eyes of the operator.

JP 2005-177627 A

  The present invention has been made in view of the prior art, and can determine whether or not the residual pesticide value being detected is affected by a disturbance and / or is detected in a state affected by the disturbance. One object is to provide a pesticide residue detection device with a simple structure that can prevent the work from being continued.

  In order to achieve the above object, the present invention includes an irradiation unit that irradiates light including infrared rays toward a detected object positioned in a detection region, and a light receiving unit that receives reflected light from the detected object. A pesticide residue detecting device for detecting a pesticide residue in the detected object by spectroscopically analyzing infrared light received by the light receiving unit, wherein a foreign matter detection sensor for detecting entry of the foreign matter into the detection region An alarm is generated and / or irradiation of light from the irradiation unit to the detected object is interrupted when the foreign object detection sensor detects the entry of the foreign object into the detection area. There is provided a pesticide residue detecting apparatus characterized by the above.

In the residual agrochemical detection device according to the present invention, the detection region refers to a region including a light irradiation path from the irradiation unit and a light reflection path from the detection target to the light receiving unit.
In addition, the detection of a foreign substance entering the detection area by the foreign substance detection sensor is not only for detecting a foreign substance that has entered the detection area, but also for detecting a foreign substance entering the detection area. Is also included.
Further, the foreign matter detected by the foreign matter detection sensor includes a person such as an operator.

In addition, as a mode in which the irradiation of light from the irradiation unit to the detection target is interrupted, a mode in which the power supply to the irradiation unit is interrupted, or a state in which the irradiation unit is energized from the irradiation unit A mode in which light irradiated toward the detection object is shielded can be exemplified.
Moreover, as a mode in which the alarm is generated, for example, a mode in which alarm means is provided and the alarm is generated by the alarm means can be exemplified. Examples of the alarm means include a display device such as a display panel, an alarm sound generator such as a buzzer, an audio output device, and the like.
For example, when the alarm means is the display device, an alarm display can be output to the display device. Examples of the warning display include warning lights and character information including warning information. When the alarm means is an alarm sound generator, an alarm sound can be output from the alarm sound generator. When the alarm means is an audio output device, an alarm audio message can be output from the audio output device.

  The residual pesticide detection apparatus according to the present invention may further include a transport mechanism that transports the detection target so as to pass through the detection region. In this case, for example, when the foreign object detection sensor detects the entry of the foreign substance into the detection area, the conveyance mechanism can be configured to stop the conveyance of the detected object.

In the residual agrochemical detection device according to the present invention, the light including infrared light may be laser light including infrared light, for example. In this case, the irradiation unit may be configured to irradiate laser light including infrared rays.
In addition, the irradiation unit may be an object to be detected positioned at a position spaced apart from the irradiation unit in the horizontal direction and / or a target positioned at a position spaced horizontally from the irradiation unit and displaced in the vertical direction. The detection body may be configured to irradiate light.
For example, the irradiating unit is configured to irradiate laser light including infrared rays, and the irradiating unit is separated in the horizontal direction from the object to be detected or the irradiating unit positioned at a position separated in the horizontal direction from the irradiating unit. In the case where the detection target positioned at the position displaced in the vertical direction is irradiated with laser light, the irradiation unit irradiates the laser light in a direction including a horizontal vector. Can be configured.

In this case, the foreign matter detection sensor includes an upper foreign matter detection sensor that detects intrusion of foreign matter from a portion above the detected body in the detection region, and a foreign matter from a portion below the detected body in the detection region. A mode including a lower foreign matter detection sensor that detects the intrusion of the lower part can be exemplified.
In the case where the irradiation unit is configured to irradiate the laser beam in a direction including a horizontal vector, and the foreign matter detection sensor includes the upper foreign matter detection sensor and the lower foreign matter detection sensor, for example, the upper foreign matter When both the detection sensor and the lower foreign matter detection sensor detect the intrusion of foreign matter, an alarm is issued, and when only the lower foreign matter detection sensor detects the intrusion of foreign matter, the irradiating unit to the detected object The laser beam irradiation can be interrupted.
The irradiating unit may be an object to be detected positioned at a position spaced vertically from the irradiating unit and / or a target positioned at a position displaced vertically from the irradiating unit and displaced in the horizontal direction. You may comprise so that a detection body may be irradiated with light.

By the way, in the case where the irradiation unit is configured to irradiate the laser beam, once the energization to the irradiation unit is interrupted, until the light emission characteristics of the irradiation unit are stabilized when the energization is performed again. This requires a predetermined time (for example, about 30 minutes), which makes it difficult to detect agricultural chemicals until the light emission characteristics of the irradiated part are stabilized. Incurs a decline.
Therefore, in the residual agrochemical detection device according to the present invention, when the irradiation unit is configured to irradiate the laser beam, the interruption of the laser beam irradiation from the irradiation unit to the detection target is It is preferable that the irradiation is performed by shielding light irradiated from the irradiation unit toward the detection target in a state where the irradiation unit is energized.
Specifically, a shutter mechanism capable of selectively communicating or blocking a light path from the irradiation unit to the detection target, and interruption of laser light irradiation from the irradiation unit to the detection target is the It is preferable that the light path be blocked by a shutter mechanism.

In the residual agricultural chemical detection apparatus according to the present invention, the foreign matter detection sensor may be a non-contact sensor. Examples of the non-contact sensor include a sensor provided with an irradiation unit that irradiates light to a foreign substance that enters the detection region and a light receiving unit that receives reflected light from the foreign substance. In this case, the residual pesticide detection device may be configured to detect entry of a foreign substance into the detection region based on a detection signal from the light receiving unit.
The foreign object detection sensor may be an image recognition sensor. As the image recognition sensor, for example, a sensor provided with an imaging unit that reads a foreign substance entering the detection region as an image can be cited. In this case, the residual pesticide detection device stores a reference initial image (threshold image) in advance, and detects the detection based on the threshold image stored in advance and the detection image read by the imaging unit. It may be configured to detect the entry of foreign objects into the area.

According to the residual agrochemical detection device according to the present invention, the foreign matter detection sensor that detects the entry of foreign matter into the detection region, and when the foreign matter detection sensor detects the entry of foreign matter into the detection region, Since an alarm is generated and / or the irradiation of light from the irradiation unit to the detected object is interrupted, when the foreign object intrusion is detected by the foreign object detection sensor By generating an alarm, it becomes possible to know whether or not the residual agricultural chemical being detected is affected by disturbance.
In addition, when the foreign object detection sensor detects the entry of a foreign object into the detection area, the light irradiation from the irradiating unit to the detected object is interrupted, and the detection is performed under the influence of disturbance. It is possible to prevent the work from continuing.

  The apparatus further includes a conveyance mechanism that conveys the detection object so as to pass through the detection area. When the foreign object detection sensor detects the entry of the foreign substance into the detection area, the conveyance mechanism When configured to stop the conveyance, the detected body can be sequentially transported by the transport mechanism, and the residual pesticide in the detected body that is sequentially transported by the transport mechanism can be sequentially detected. It is possible to improve the efficiency of detection of residual agricultural chemicals, and when the foreign matter detection sensor detects the entry of foreign matter into the detection area, the detection target is sequentially transported by the transport mechanism. Thus, it becomes possible to recognize which of the detected bodies sequentially transported to the transport mechanism is subject to the influence of the disturbance. For example, the detected object located in the detection region when the conveyance of the detected object by the conveying mechanism is stopped can be the target of the influence of disturbance.

  In addition, when the irradiation unit is configured to irradiate laser light including infrared rays, it is possible to accurately detect residual agricultural chemicals using the laser light.

The irradiation unit is configured to irradiate the laser beam in a direction including a horizontal vector, and the foreign object detection sensor includes the upper foreign object detection sensor when the upper foreign object detection sensor and the lower foreign object detection sensor are included. When both the detection sensor and the lower foreign matter detection sensor detect the intrusion of foreign matter, an alarm is issued, and when only the lower foreign matter detection sensor detects the intrusion of foreign matter, the irradiating unit to the detected object In a case where the irradiation of the laser beam is interrupted, the condition for issuing an alarm and the condition for interrupting the irradiation of the laser beam from the irradiation unit to the detected object are defined as the target of the foreign object to be detected. It can be changed depending on the intrusion state from the upper part and the lower part of the detection body.
For example, when both the upper foreign matter detection sensor and the lower foreign matter detection sensor detect the intrusion of the foreign matter, it is determined that the person is in an upright posture and an alarm is issued, and only the lower foreign matter detection sensor detects the foreign matter. When an intrusion is detected, it is determined that the person is bent down to lower the head (in other words, the person's head is determined to be near the irradiation path or the reflection path) The irradiation with the laser beam from the irradiation unit to the detection target may be interrupted.
Thus, for example, when it is determined that a person entering the detection area is in an upright posture, an alarm is issued to know whether the residual agricultural chemical being detected is affected by disturbance. When it is determined that the person intruding into the detection region is in a posture bent down to lower the head, the irradiation of the laser beam from the irradiation unit to the detected object is interrupted. It is possible to prevent the laser light from being irradiated to the eyes of a person.

  In addition, when the irradiation of the laser beam from the irradiation unit to the detected object is performed by blocking the light path by the shutter mechanism, the irradiation unit is energized. The irradiation of the laser beam from the irradiation unit to the object to be detected can be interrupted, and thereby the energization to the irradiation unit is not interrupted, so the agrochemical detection work by interrupting the light irradiation of the irradiation unit It is possible to effectively prevent the deterioration of the property.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a schematic view of a residual pesticide detection apparatus 1 according to the present embodiment as viewed from above, and FIG. 2 is a view of the residual pesticide detection apparatus 1 shown in FIG. 1 as viewed from the upstream side in the conveyance direction of the detection target. It is a schematic diagram.

As shown in FIG. 1, the residual pesticide detection apparatus 1 according to the present embodiment includes an irradiation unit 2 that irradiates light including infrared rays toward a detection target T located in a detection region, and the detection target. And a light receiving unit 3 that receives reflected light from T, and is configured to detect residual pesticides on the detection target T by spectroscopic analysis of infrared light received by the light receiving unit 3.
Here, the detection region is an irradiation path L1 of light from the irradiation unit 2 and a reflection path L2 of light from the detected object T irradiated with light by the irradiation unit 2 to the light receiving unit 3. Yes.

The residual pesticide detection apparatus 1 includes a foreign matter detection sensor 4 that detects entry of the foreign matter P into the detection regions L1 and L2, and the foreign matter detection sensor 4 detects the foreign matter P in the detection regions L1 and L2. When an intrusion is detected, an alarm is generated and / or irradiation of light from the irradiation unit 2 to the detection target T is interrupted.
The foreign matter P detected by the foreign matter detection sensor 4 includes a person such as an operator.

According to the residual pesticide detection apparatus 1 having such a configuration, an alarm is generated when the foreign matter detection sensor 4 detects the entry of a foreign matter (for example, an operator) P into the detection areas L1 and L2. Thus, it is possible to know whether or not the residual agricultural chemical being detected is affected by disturbance (and whether or not the detection accuracy of the residual agricultural chemical has deteriorated).
Further, when the foreign matter detection sensor 4 detects the intrusion of the foreign matter P into the detection areas L1 and L2, the irradiation of light from the irradiating unit 2 to the detected object T is interrupted, thereby affecting the influence of disturbance. It is possible to prevent the detection operation from being continued in a state where the detection is received (and thus the detection accuracy of the residual pesticide is deteriorated).

More specifically, the residual pesticide detection apparatus 1 can be applied to a sorting apparatus 10 configured to sort the detection target T based on the residual pesticide on the outer surface of the detection target T such as fruits and vegetables.
In the present embodiment, the sorting apparatus 10 is incompatible with the conforming body (the detected object T whose residual agricultural chemical concentration is within the reference value) due to the residual agricultural chemical of the detected object T detected by the residual agricultural chemical detection apparatus 1. A sorting unit 11 configured to sort a body (a detected substance T having a residual pesticide concentration exceeding a reference value), and the residual pesticide in the transport direction of the detected object T (see arrow X in FIG. 1). A sorting unit 11 is provided on the downstream side of the detection device 1.
The sorting device 10 measures the external quality such as the size and weight of the detection target T and / or the internal quality such as sugar content and acidity of the detection target T, and detects the detection target based on the measurement result. It may be configured to sort the body T.
Examples of the fruits and vegetables include, but are not limited to, fruits such as strawberries, tangerines, oranges, melons, and tomatoes, and various vegetables.

The residual agrochemical detection device 1 according to the present embodiment further includes a control device 5. FIG. 3 is a block diagram showing a schematic configuration of a control system of the residual pesticide detection apparatus 1.
Here, the control device 5 includes a control unit 51 and a storage unit 52.

Specifically, the control unit 51 includes a central processing unit (CPU) and includes control calculation means for executing various calculation processes.
The storage unit 52 stores a control program and necessary functions, and includes, for example, a ROM and a RAM.
The storage unit 52 is configured to store a control program for controlling the residual pesticide detection apparatus 1 as a whole, or to store predetermined data relating to an arithmetic expression or a lookup table.

The irradiating unit 2 is electrically connected to an output system of the control device 5 so as to irradiate light including the infrared rays based on an operation signal from the control device 5, and the light receiving unit 3 It is electrically connected to the input system of the control device 5 so that a signal (information) related to the reflected light from the detection target T located in the detection regions L1 and L2 is transmitted to the control device 5. (See FIG. 3).
And the said control apparatus 5 irradiates the to-be-detected body T located in the said detection area L1, L2 with the light containing the said infrared rays from the said irradiation part 2, and this to-be-detected body received by the said light-receiving part 3 The pesticide residue in the detection target T is detected by spectroscopically analyzing a signal related to the reflected light from T.
Specifically, the control device 5 obtains a spectral distribution of the light intensity with respect to the wavelength of the reflected light based on a signal related to the reflected light received by the light receiving unit 3, and obtains a peak distribution for each type of agricultural chemical by the spectral distribution. The type of pesticide is determined by comparison, and the residual pesticide concentration is calculated from the maximum peak value in the spectral distribution.
As described above, the sorting unit 11 determines whether or not the residual pesticide of the detection target T obtained by the residual pesticide detection apparatus 1 is within a reference value, and based on the determination result. Thus, the detected object T is selected as the conforming body or the incompatible body.

In this Embodiment, the said irradiation part 2 is comprised so that the laser beam containing infrared rays may be irradiated.
By providing such a configuration, the residual agricultural chemical detection apparatus 1 can accurately detect residual agricultural chemicals using the laser light.
As long as this irradiation part 2 can irradiate the laser beam containing infrared rays, you may use any laser light source, For example, Although not limited to it, a semiconductor laser light source can be used.

Specifically, the irradiating unit 2 is configured to irradiate the detection target T positioned at a position spaced apart from the irradiating unit 2 in the horizontal direction, and the laser beam is emitted in a direction including a horizontal vector. It is comprised so that it may irradiate.
The light receiving unit 3 is configured to receive reflected light from the detection target T located at a position spaced apart from the irradiation unit 2 in the horizontal direction.

  The residual pesticide detection apparatus 1 according to the present embodiment includes an alarm unit 6 and when the foreign object detection sensor 4 detects the entry of the foreign substance P into the detection areas L1 and L2, the alarm unit 6 issues an alarm. It is configured to be output.

Here, the alarm means 6 is an alarm sound generator such as a buzzer, and an alarm sound is output when the foreign object detection sensor 4 detects the entry of the foreign object P into the detection areas L1 and L2. It has become so. The alarm means 6 may be a display device such as a display panel or an audio output device.
Specifically, the alarm means 6 is electrically connected to an output system of the control device 5 so that an alarm is output based on an operation signal from the control device 5 (see FIG. 3).

Then, the control device 5 determines whether or not the foreign object detection sensor 4 has detected the intrusion of the foreign object P into the detection areas L1 and L2, and when it is determined that the intrusion of the foreign object P has been detected. The alarm means 6 outputs an alarm.
By providing such a configuration, the residual agricultural chemical detection apparatus 1 is configured to issue an alarm from the alarm means 6 when the foreign object detection sensor 4 detects the entry of the foreign object P into the detection regions L1 and L2. Thus, it is possible to instantly know whether or not the residual agricultural chemical being detected is affected by disturbance.

Moreover, the residual pesticide detection apparatus 1 according to the present embodiment further includes a transport mechanism 8 that transports the detection objects T, T... So as to pass through the detection regions L1, L2, and the foreign matter detection sensor. When the entry of the foreign matter P into the detection areas L1, L2 is detected by 4, the transport of the detected bodies T, T... By the transport mechanism 8 is stopped.
By providing such a configuration, the residual pesticide detection apparatus 1 can sequentially convey the detection target T by the conveyance mechanism 8 and can also detect the detection target T, T ·, which is sequentially conveyed by the conveyance mechanism 8. .. The pesticide residue can be detected in sequence, thereby improving the work efficiency when detecting the pesticide residue and detecting the entry of foreign matter P into the detection areas L1, L2 by the foreign matter detection sensor 4. When this is done, the transport of the detected objects T, T,... Sequentially transported by the transport mechanism 8 can be interrupted immediately, whereby the detected objects T, It is possible to recognize which of the objects T is a target of the influence of disturbance. Here, in the residual pesticide detection apparatus 1, when the transport of the detected bodies T, T... By the transport mechanism 8 is stopped, the detected bodies T ′ located in the detection regions L1, L2 are detected. It can be recognized that it is subject to the influence of disturbance.

Specifically, as shown in FIG. 1, the transport mechanism 8 includes a belt conveyor 81 that transports the detected objects T, T..., And the belt conveyor 81 includes a frame 81 a, a rotary driven shaft 81 b, A rotation drive shaft 81c, a drive unit 81d, and a belt 81e are provided.
In the belt conveyor 81, the belt 81e is wound around the rotation driven shaft 81b and the rotation drive shaft 81c, and the rotation driven shaft 81b and the rotation drive shaft 81c are in a state where the belt 81e is wound. The frame 81a is pivotally supported so as to be rotatable about its axis. The rotational drive shaft 812c is rotationally driven by an actuator such as a motor provided in the drive unit 81d.
Further, here, the transport mechanism 8 transports the detected bodies T, T... Sequentially based on the operation signal from the control device 5 and transports the detected bodies T, T. Is electrically connected to the output system of the control device 5 (see FIG. 3).
Then, the control device 5 determines whether or not the foreign object detection sensor 4 has detected the intrusion of the foreign object P into the detection areas L1 and L2, and when it is determined that the intrusion of the foreign object P has been detected. The transport mechanism 8 is configured to switch to the stop operation.

Here, the foreign matter detection sensor 4 is a non-contact sensor, and irradiation units 411 and 421 for irradiating light L31 and L32 to the foreign matter P entering the detection regions L1 and L2, and the foreign matter P Light receiving portions 412 and 422 for receiving reflected light L41 and L42 from the light.
Specifically, the irradiation units 411 and 421 are electrically connected to an output system of the control device 5 so that the lights L31 and L32 can be irradiated based on an operation signal from the control device 5, and The light receiving units 412 and 422 are electrically connected to the input system of the control device 5 so that a signal (information) related to the reflected light from the foreign matter P entering the detection areas L1 and L2 is transmitted to the control device 5. (See FIG. 3).
And the said control apparatus 5 irradiates the said lights L31 and L32 from the said irradiation part 2, and the light from the said irradiation parts 411 and 421 is based on the signal regarding the reflected light from the said light-receiving parts 412 and 422, and the said light-receiving part The intrusion of the foreign matter P into the detection areas L1 and L2 is detected depending on whether the light is received by 412 and 422 or not.

More specifically, the foreign matter detection sensor 4 includes an upper foreign matter detection sensor 41 that detects intrusion of foreign matter P from a portion above the detected body T located in the detection regions L1 and L2 in the detection regions L1 and L2. And a lower foreign matter detection sensor 42 for detecting the intrusion of foreign matter P from a portion below the detected object T located in the detection regions L1 and L2 in the detection regions L1 and L2.
The upper foreign matter detection sensor 41 includes an irradiation unit 411 that emits light L31 to a foreign matter P that enters from a portion above the detection target T located in the detection regions L1 and L2 in the detection regions L1 and L2. A light receiving unit 412 that receives the reflected light L41 from the foreign matter P irradiated with the light L31 by the irradiation unit 411 is provided.
The lower foreign matter detection sensor 42 emits light L32 to the foreign matter P that enters from the lower part of the detection object T located in the detection regions L1 and L2 in the detection regions L1 and L2. And a light receiving unit 422 for receiving the reflected light L42 from the foreign matter P irradiated with the light L32 by the irradiation unit 421.

When the upper foreign matter detection sensor 41 and the lower foreign matter detection sensor 42 detect the entry of the foreign matter P (for example, the control device 5 determines that the worker P is in an upright posture). ) When an alarm is issued and only the lower foreign matter detection sensor 42 detects the intrusion of the foreign matter P (for example, the posture in which the worker P is bent to lower the head (see P ′ in FIG. 2)). In other words, it is determined that the head of the worker P is in the vicinity of the irradiation path L1 and the reflection path L2) and the irradiation of the laser beam from the irradiation unit 2 to the detected object T Is configured to be interrupted.
By providing such a configuration, the residual pesticide detection apparatus 1 is, for example, when an alarm is issued when it is determined that the worker P entering the detection areas L1, L2 is in an upright posture, When it is possible to know whether or not the residual agricultural chemical being detected is affected by disturbance, and when it is determined that the worker P intruding into the detection areas L1 and L2 is in a posture bent down to lower the head In this case, it is possible to prevent the laser light from being irradiated to the eyes of the operator P by interrupting the irradiation of the laser light from the irradiation unit 2 to the detection target T.

  The irradiation unit 2 configured to irradiate the laser beam in a direction including a horizontal vector is spaced apart from the irradiation unit 2 in the horizontal direction and vertically (in the illustrated example, downward) as shown in FIG. ) May be configured to irradiate light to the detected object T positioned at the position displaced in (). In this case, the light receiving unit 3 may be configured to receive the reflected light from the detection target T located at a position spaced apart from the irradiation unit 2 in the horizontal direction and displaced in the vertical direction.

Further, as shown in FIGS. 1 and 2, the residual pesticide detection apparatus 1 according to the present embodiment is a shutter that can selectively communicate or block the light path L1 ′ from the irradiation unit 2 to the detection target T. A mechanism 7 is provided, and the laser beam irradiation from the irradiation unit 2 to the detection target T is interrupted by the light path L1 ′ being blocked by the shutter mechanism 7.
Here, the shutter mechanism 7 includes a light shielding member 71. The light shielding member 71 blocks the light path L1 ′ and the light blocking position so as to communicate the light path L1 ′. It is comprised so that it can take the retreat position which retreats from.
FIG. 1 shows a state in which the light shielding member 71 indicated by a broken line is in the blocking position, and shows a state in which the light shielding member 71 indicated by a solid line is in the retracted position. FIG. 2 shows a state in which the light shielding member 71 is in the blocking position.

Specifically, the shutter mechanism 7 outputs the output system of the control device 5 so that the light shielding member 71 can be selectively switched between the blocking position and the retracted position based on an operation signal from the control device 5. Are electrically connected to each other (see FIG. 3).
Then, the control device 5 determines whether or not the foreign object detection sensor 4 has detected the intrusion of the foreign object P into the detection areas L1 and L2, and when it is determined that the intrusion of the foreign object P has been detected. The light shielding member 71 is configured to be switched to the blocking position.

By providing such a configuration, the residual pesticide detection apparatus 1 is configured so that the shutter mechanism 7 removes the irradiation unit 2 from the irradiation unit 2 when the foreign matter detection sensor 4 detects the entry of the foreign matter P into the detection regions L1 and L2. Since the irradiation of the laser beam to the detection target T is interrupted, it is possible to prevent the detection operation from being continued in the state of being affected by the disturbance.
In the residual agricultural chemical detection apparatus 1, the irradiation of the laser light from the irradiation unit 2 to the detection target T is interrupted by blocking the light path L 1 ′ by the shutter mechanism 7. 2 can interrupt the irradiation of the laser beam from the irradiating unit 2 to the detected object T in a state in which the current is applied to the detected object T, and thus the energization to the irradiating unit 2 is not interrupted (in other words, Since it is not necessary to wait until the light emission characteristics of the irradiation unit 2 are stabilized, it is possible to effectively prevent the work efficiency of the agrochemical detection work from being reduced due to the interruption of the light irradiation of the irradiation unit 2.

In the present embodiment, the foreign object detection sensor 4 is a non-contact sensor, but may be an image recognition sensor.
FIG. 5 shows an example 1 ′ in which a foreign matter detection sensor 4 ′ used as an image recognition sensor is provided in place of the foreign matter detection sensor 4 used as a non-contact sensor in the residual agricultural chemical detection apparatus 1 shown in FIG. It is the schematic diagram seen from the conveyance direction X upstream of T.
Further, in the residual pesticide detection apparatus 1 ′ shown in FIG. 5, a control device 5 ′ is provided in place of the control device 5 in the residual pesticide detection apparatus 1 shown in FIG. 1.
FIG. 6 is a block diagram showing a schematic configuration of a control system of the residual agricultural chemical detection apparatus 1 ′ shown in FIG.
5 and 6, substantially the same members in the residual agricultural chemical detection apparatus 1 shown in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.
The control device 5 ′ has substantially the same configuration as the control device 5 of the residual agrochemical detection device 1 shown in FIG. 1 except that the operation control is performed based on the detection result of the foreign matter detection sensor 4 ′ that is an image recognition sensor. It is said.

The foreign matter detection sensor 4 ′ shown in FIG. 5 includes an imaging unit 41 ′ that reads the foreign matter P entering the detection areas L1 and L2 as an image.
Specifically, the foreign matter detection sensor 4 ′ is electrically connected to the input system of the control device 5 ′ so that the detection image read by the imaging unit 41 ′ is transmitted to the control device 5. (See FIG. 6).

Here, the control device 5 ′ includes a storage unit 52 ′ instead of the storage unit 52. The storage unit 52 ′ stores in advance data of a reference initial image (that is, a threshold image that can be determined that no foreign matter has entered the detection areas L1 and L2).
Then, the control device 5 ′ determines whether or not the data of the detected image is within the threshold based on the data of the threshold image stored in advance and the data of the detected image read by the imaging unit 41 ′. Thus, the intrusion of the foreign matter P into the detection areas L1 and L2 is detected.

  When the foreign matter detection sensor 4 ′ detects the entry of the foreign matter P into the detection regions L1 and L2, the residual agricultural chemical detection device 1 ′ having such a configuration generates an alarm and / or the irradiation. Irradiation of light from the unit 2 to the detected object T is interrupted.

In the control device 5 ′, a predetermined image pattern corresponding to the intrusion state of the foreign matter is stored in advance in the storage unit 52 ′, and the image pattern stored in advance and read by the imaging unit 41 ′. Based on the detected image, the condition for issuing an alarm and the condition for interrupting the irradiation of light from the irradiation unit 2 to the detected object T can be changed depending on the intrusion state of the detected foreign matter. May be.
For example, a first image pattern that can determine that a person is in an upright posture and a second image pattern that can be determined to be in a posture in which the person is bent down so that the head is lowered are stored in advance in the storage unit 52 ′. When the control device 5 ′ determines that the detected image read by the imaging unit 41 ′ matches the first image pattern, the control device 5 ′ determines that the person is in an upright posture and issues an alarm. When it is determined that the detected image read by the unit 41 ′ matches the second image pattern, it is determined that the person is bent down so that the head is lowered (in other words, the head of the person May be configured so that the irradiation of light from the irradiation unit 2 to the detection target T is interrupted (in the vicinity of the irradiation path L1 and the reflection path L2).

FIG. 1 is a schematic view of the residual agricultural chemical detection apparatus according to the present embodiment as viewed from above. FIG. 2 is a schematic view of the residual pesticide detection apparatus shown in FIG. 1 as viewed from the upstream side in the transport direction of the detection target. FIG. 3 is a block diagram showing a schematic configuration of a control system of the residual pesticide detection apparatus shown in FIG. FIG. 4 shows the pesticide residue detecting apparatus shown in FIG. 1, wherein the irradiation unit is configured to irradiate light to a detection object positioned at a position that is horizontally separated from the irradiation unit and displaced in the vertical direction. It is the schematic diagram which looked at an example from the conveyance direction upstream of the to-be-detected body. FIG. 5 shows an example in which a foreign matter detection sensor as an image recognition sensor is provided in place of the foreign matter detection sensor as a non-contact sensor in the residual agricultural chemical detection apparatus shown in FIG. It is a schematic diagram. FIG. 6 is a block diagram showing a schematic configuration of a control system of the residual pesticide detection apparatus shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Residual pesticide detection apparatus 2 ... Irradiation part 3 ... Light-receiving part 4, 4 '... Foreign material detection sensor
41 ... Upper foreign matter detection sensor 42 ... Lower foreign matter detection sensor 7 ... Shutter mechanism
8 ... Conveying mechanism L1, L2 ... Detection region P ... Foreign matter T ... Detected object

Claims (8)

An irradiating unit that irradiates light including infrared rays toward an object to be detected located in a detection region and a light receiving unit that receives reflected light from the object to be detected, and the infrared rays received by the light receiving unit are spectrally separated. A pesticide residue detecting device for detecting a residue pesticide residue of the detected object by analyzing,
A foreign matter detection sensor for detecting the entry of foreign matter into the detection region;
An alarm is generated and / or irradiation of light from the irradiation unit to the detected object is interrupted when the foreign object detection sensor detects the intrusion of the foreign object into the detection area. A pesticide residue detection device. A transport mechanism that transports the detection object so as to pass through the detection region;
The apparatus for detecting residual agricultural chemicals according to claim 1, wherein when the foreign matter detection sensor detects the entry of foreign matter into the detection area, the transport mechanism stops the transport of the detected object. .   The residual agricultural chemical detection apparatus according to claim 1, wherein the irradiation unit is configured to irradiate laser light including infrared rays. The irradiation unit is configured to irradiate the laser light in a direction including a horizontal vector,
The foreign matter detection sensor includes an upper foreign matter detection sensor that detects entry of foreign matter from a portion above the detected body in the detection region, and foreign matter entry from a portion below the detected body in the detection region. 4. The residual agricultural chemical detection apparatus according to claim 3, further comprising a lower foreign matter detection sensor for detection. When both the upper foreign matter detection sensor and the lower foreign matter detection sensor detect the entry of foreign matter, an alarm is issued,
The residual according to claim 4, wherein when only the lower foreign matter detection sensor detects intrusion of foreign matter, irradiation of the laser beam from the irradiation unit to the detected object is interrupted. Pesticide detection device. A shutter mechanism capable of selectively communicating or blocking a light path from the irradiation unit to the detected object;
6. The residual pesticide detection apparatus according to claim 3, wherein the laser beam irradiation from the irradiation unit to the detection target is interrupted by blocking the light path by the shutter mechanism. .   The residual pesticide detection apparatus according to claim 1, wherein the foreign matter detection sensor is a non-contact sensor.   The residual pesticide detection apparatus according to claim 1, wherein the foreign matter detection sensor is an image recognition sensor.

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