EP4329486A1 - Procédé et système de détection de larves dans un palmier - Google Patents
Procédé et système de détection de larves dans un palmierInfo
- Publication number
- EP4329486A1 EP4329486A1 EP22719597.1A EP22719597A EP4329486A1 EP 4329486 A1 EP4329486 A1 EP 4329486A1 EP 22719597 A EP22719597 A EP 22719597A EP 4329486 A1 EP4329486 A1 EP 4329486A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- larvae
- probe
- detection
- khz
- plant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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- 241001133760 Acoelorraphe Species 0.000 title claims description 37
- 238000001514 detection method Methods 0.000 claims abstract description 55
- 239000000523 sample Substances 0.000 claims abstract description 47
- 230000033001 locomotion Effects 0.000 claims abstract description 41
- 208000015181 infectious disease Diseases 0.000 claims abstract description 19
- 230000005284 excitation Effects 0.000 claims abstract description 17
- 241000196324 Embryophyta Species 0.000 claims description 45
- 238000012545 processing Methods 0.000 claims description 20
- 241000254171 Curculionidae Species 0.000 claims description 13
- 230000005236 sound signal Effects 0.000 claims description 11
- 239000012855 volatile organic compound Substances 0.000 claims description 9
- 239000000835 fiber Substances 0.000 claims description 8
- 230000001418 larval effect Effects 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
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- 238000013461 design Methods 0.000 description 4
- 235000013601 eggs Nutrition 0.000 description 4
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- 241000233788 Arecaceae Species 0.000 description 3
- 238000011109 contamination Methods 0.000 description 3
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- 230000001976 improved effect Effects 0.000 description 3
- 241001078693 Rhynchophorus ferrugineus Species 0.000 description 2
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- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004060 metabolic process Effects 0.000 description 2
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- 239000000126 substance Substances 0.000 description 2
- 235000011202 Angiopteris lygodiifolia Nutrition 0.000 description 1
- 241000723185 Cyathea Species 0.000 description 1
- 241001448411 Dracaena draco Species 0.000 description 1
- 240000005561 Musa balbisiana Species 0.000 description 1
- 235000018290 Musa x paradisiaca Nutrition 0.000 description 1
- 241000607479 Yersinia pestis Species 0.000 description 1
- 241001532059 Yucca Species 0.000 description 1
- 235000004552 Yucca aloifolia Nutrition 0.000 description 1
- 235000012044 Yucca brevifolia Nutrition 0.000 description 1
- 235000017049 Yucca glauca Nutrition 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 210000003323 beak Anatomy 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 210000000080 chela (arthropods) Anatomy 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
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Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M29/00—Scaring or repelling devices, e.g. bird-scaring apparatus
- A01M29/16—Scaring or repelling devices, e.g. bird-scaring apparatus using sound waves
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M1/00—Stationary means for catching or killing insects
- A01M1/02—Stationary means for catching or killing insects with devices or substances, e.g. food, pheronones attracting the insects
- A01M1/026—Stationary means for catching or killing insects with devices or substances, e.g. food, pheronones attracting the insects combined with devices for monitoring insect presence, e.g. termites
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
- G01H11/08—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means using piezoelectric devices
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M29/00—Scaring or repelling devices, e.g. bird-scaring apparatus
- A01M29/16—Scaring or repelling devices, e.g. bird-scaring apparatus using sound waves
- A01M29/18—Scaring or repelling devices, e.g. bird-scaring apparatus using sound waves using ultrasonic signals
Definitions
- the present invention relates to methods and devices for detecting larvae in a stiped plant such as a palm tree.
- the invention relates to a method and system for detecting red weevil larvae in a palm tree.
- the red palm weevil (Rhynchophorus ferrugineus) of the palm tree is a daunting pest.
- the female red weevil lays a few hundred eggs in one of the vulnerable parts of the palm tree.
- These eggs after only a few days, give rise to larvae that attack the stem of the palm from the inside (soft part).
- the larvae have, at the level of the muzzle, pincers in the form of very sharp beaks. Thanks to the force of these claws, the larvae are able to cut the fibers that make up the soft part of the palm stem, and feed on the flowing sap.
- the larvae move inside the stem of the palm tree and/or in the branches by digging galleries. After a few weeks, the palm is hollow inside and ends up withering and falling.
- the larvae dig galleries to the end of the surface of the palm stem, which causes the sap to flow outwards and indicates the presence of possible contamination of the palm tree by the larvae.
- the present invention aims to detect early and well before the tree is irreparably withered, the existence of larvae inside the stem or in the palms. Another objective of the invention is to provide a method and a device making it possible to identify the presence of larvae in a plant in a reliable and precise manner.
- the invention proposes a method for detecting larvae in a stiped plant by means of a step of detecting movement inside the plant, said method being very advantageous in that it implements : - a step of excitation of the larvae by the emission of a sound signal in a frequency band stressing said larvae and stimulating their body movement, and
- the method of the invention thus makes it possible to reliably determine the presence of the larvae in the plant by means of a movement detection signal, and in particular because the movements of the larvae can be triggered under command by remission of a sound signal. stressing them.
- the method of the invention can advantageously be implemented for the detection of red weevil larvae in a palm tree.
- the frequency band for the excitation sound signal emission is between 1 kHz and 30 kHz, and the motion detection is performed in a frequency band between 10 Hz and 500 Hz.
- the accuracy of the larvae detection process can be advantageously improved by carrying out one, all or combinations of the following actions:
- results obtained from these actions, and all serving as an indicator of the presence of the larvae, are taken into consideration by a larvae detection algorithm to provide a result on said identification of the larvae.
- the invention also relates to a system for detecting larvae in a plant with a stipe, said system comprising a motion sensor, and being particular in that it comprises a probe intended to be inserted into the stipe of the plant, said probe housing an electronic circuit integrating said motion sensor, and a loudspeaker configured to emit a sound signal stressing the larvae.
- the probe of the invention is therefore very advantageous in that it comprises all of the components necessary to carry out the excitation and detection steps of the method for detecting larvae of the invention.
- the larvae detection system comprises an external module integrating a signal processing unit configured to implement a larvae detection algorithm, said external module being intended to be attached to the outside of the plant by means of a strap and to be close to the probe.
- the probe is configured to transmit a motion detection signal to said signal processing unit, which makes it possible to perform signal processing to identify the larvae outside the probe, and therefore to limit the dimensions of the probe.
- the invention proposes to provide the external module with a light indicator to indicate the state of infection of the plant.
- the invention proposes to design the external module as a loT connected object.
- the system includes a remote server such as a cloud server hosting a database and an application, and the external module integrates:
- radiofrequency communication module configured to send data transmitted by the probe and/or data on the identification of the larvae to the server, said server storing said data in the database, and said application being configured to transmit an alarm infection to a system user.
- the user of the system will thus be able to receive notifications on his laptop or computer, to intervene on a plant showing signs of infection.
- the external module is wired to the probe and includes a battery powered by a solar panel, said battery powering the external module and the probe.
- the motion sensor is sensitive to frequencies between 10 Hz and 500 Hz, and the sound signal includes a sound frequency between 1 kHz and 30 kHz. These frequencies allow respectively to detect the very low frequency vibrations emitted by the bodily movements of the larvae, being in particular stressed by said sound frequencies.
- the probe preferably has dimensions of the order of 20 mm by 60 mm and includes a power supply, a power interface to drive the loudspeaker, an accelerometer as a motion sensor, a circuit shaping the signal, an amplifier and a signal transmission unit configured to transmit the motion detection signal to the processing unit, said transmission being preferably carried out by means of a wired connection between the probe and the 'processing unit.
- the device comprises at least one additional sensor, such as a piezoelectric type sound detector configured to transmit a detected signal in a frequency band between 0.5 KHz and 10 KHz. It is thus advantageously possible to also identify the acoustic vibrations emitted by the larvae when they nibble and tear the fibers of the plant.
- a piezoelectric type sound detector configured to transmit a detected signal in a frequency band between 0.5 KHz and 10 KHz. It is thus advantageously possible to also identify the acoustic vibrations emitted by the larvae when they nibble and tear the fibers of the plant.
- the device can integrate several additional sensors chosen from a temperature sensor, a humidity sensor, a CO2 sensor and/or a VOC volatile organic compound sensor.
- the reliability of larval detection can thus be improved, but the device will also be used to collect data to understand the appearance and evolution of a larval infection.
- FIG. 1 A diagram of the method for detecting larvae according to one embodiment of the invention.
- FIG. 2 A diagram of the method for detecting larvae according to a second embodiment of the invention.
- FIG. 3 A simplified representation of the larval detection system of the invention.
- FIG. 4 A design diagram of the detection probe of the invention according to a three-stage functional architecture.
- FIG. 5 An example of a signature obtained by detecting the movement of larvae.
- the present invention provides a method and a system for identifying larvae in a stiped plant, and making it possible to identify the presence of said larvae reliably and during an initial state of infection of the plant.
- a stipe also known as false trunk, refers to the stem of land plants such as palms, yuccas, dragon trees, tree ferns or banana trees.
- the stipes differ from true trunks by the absence of significant growth in thickness, and by the absence of growth rings typical of the trunks of dicotyledonous trees.
- the stipes are characterized by an interlocking of leathery leaf sheaths. In the description of the invention, the word stipe and stem are used equivalently.
- the method and the system of the invention target the detection of red weevil in a palm tree.
- the principle of the invention can be applied to other plants with stems and the detection of its infection by larvae.
- fig. 1 shows a simplified diagram of the steps of the method for detecting larvae of the invention. This process is based on the detection of movement inside the palm tree, and in particular by the vibrations emitted by the movements of the larvae.
- the invention proposes a method for detecting larvae comprising an excitation step 10 by means of a sound signal comprising a predefined frequency to stress the larvae and/or stimulate their bodily movement;
- This excitation step proposed by the invention is very advantageous for identifying the larvae inside the plant at any time. Indeed, the Applicant has noticed that the emission of certain sound frequencies is capable of generating an erratic movement of the larvae, and more particularly:
- the invention proposes to stress the larvae with a sound frequency between 1 kHz and 30 kHz, and preferably between 2 kHz and 20 KHz, or between 4 and 18 kHz.
- the method targets the detection of red weevil in a palm tree and the excitation frequencies are between 12 and 15 KHz.
- the sound signal will have a sound level of at least 50 dB.
- the excitation step has a duration of at least 1 minute.
- the method also comprises a detection step 20, carried out consecutively or simultaneously with the excitation step, and in which the very low frequency vibrations emitted by the larvae during their movement are detected.
- these vibrations are detected by a motion sensor in a frequency band between 10 Hz and 500 Hz.
- This motion sensor 50 is for example a three-axis accelerometer.
- the detected signal is then amplified and transmitted in a step 30 to a signal processing unit to perform a step of processing said signal and identifying the larvae 40.
- the method for detecting larvae can also comprise a preliminary detection step, carried out before the step excitation and so as to be able to compare the profile of the signal before and after said excitation.
- the invention proposes to increase the accuracy and reliability of the results by carrying out one or more of the following additional detections or measurements: 1. Detection of vibrations in a frequency range between 0.5 KHz and
- the invention also relates to a system (FIG. 3) for the detection of larvae comprising a probe 100 intended to be introduced into the stem of a plant and comprising one or more sensors 50 for detecting movement.
- the probe 100 of the invention is very advantageous in that it also comprises an acoustic generator configured to emit a high frequency sound signal and in the ultrasound band. It is thus possible to implement the method for detecting larvae of the invention by means of this probe, and in particular to carry out the excitation step to detect the vibration emitted by the movement of the stressed larvae.
- the system of the invention also comprises an external module 200 advantageously incorporating a signal processing unit 80 comprising signal processing and data storage means intended to implement the larvae detection algorithm on the basis of the signals received from the sensors.
- the invention thus proposes to separate the signal processing unit 80 from the probe 200, which makes it possible to design the probe with reduced dimensions, and so as to facilitate its insertion into the stem of plants, in particular young plants n not yet having a very developed stem diameter.
- the probe has approximate dimensions of the order of 20mm by 60mm.
- the probe 100 is in the form of a tubular casing 20 comprising a first rear end comprising a power supply unit, a central part housing an electronic circuit 30 integrating all the electronic components for controlling the sensors 50 and the loudspeaker, the latter being preferably integrated in a front end of the probe having a conical shape.
- the casing of the probe 100 is made of a metallic material resistant to corrosion at acid pH values, such as those found inside the stem of a palm tree.
- the probe comprises a rear cover 15 receiving the power supply and electronic circuit cables 11, and a front cover 16 housing the sensors and the loudspeaker.
- the probe 100 is assembled in a sealed manner and has preferred dimensions of the order of 20 mm by 60 mm.
- Figure 4 shows a design diagram of the probe of the invention according to a three-stage functional architecture:
- a power supply stage 1 comprising the power supply unit supplying the electronic circuit, said unit being provided with a reference voltage input coming from an external power supply source. This power supply is used to distribute the necessary voltage and current supplies to each of the electronic components of the probe.
- a power stage 2 comprising a power interface which receives at its input a low-power alternating signal whose frequency can be between 1 kHz and 30 kHz. The power stage converts the received signal into a strong signal capable of driving the loudspeaker.
- the acoustic generator once controlled, is able to generate a sound signal propagating in the stem of the palm tree to stress the larvae.
- a detection stage 3 comprising one or more probe sensors, a signal shaping circuit, a signal amplifier, and a signal transmission unit preferably comprising a wired interface.
- the signal detected by the sensors is therefore converted into an electrical signal, before being amplified and transmitted to the signal processing unit 80.
- the signal processing unit 80 is present in the external module 200, and the transmission of the signal from the sensors is preferably done by means of a wired connection.
- the probe of the larvae detection system is introduced into a hole made in the stem of the plant, and the external module 200 is fixed to the stem near the probe 100 by a fastening means.
- the external module 200 is fixed by means of a strap to the stem of the plant, and the probe 100 and the external module 200 remain subsequently connected to said plant, and so as to monitor on the long term his state of health.
- a first sensor of the probe is a three-axis accelerometer configured to detect vibrations comprising a frequency band between 10 Hz and 500 Hz.
- This sensor of the accelerometer type is therefore capable of detecting the extremely low frequency and ultra low frequency vibrations emitted by the moving larvae, for example when they are stressed by the sound of excitation.
- Figure 5 illustrates an example of frequency signature related to said movements.
- the probe 100 also comprises the following sensors: - a piezoelectric type sound sensor configured to detect vibrations having a frequency between 0.5 KHz and 10 KHz, these vibrations being linked to the sound emissions of the nibbling movements of the larvae, as well as to the tearing of the fibers at the interior of the plant;
- the invention proposes to announce the result on the identification of larvae to the user of the system by at least two means.
- the first and simplest solution consists in providing an indicator light indicating by a color code the state of health of the plant, and therefore a need for intervention on this plant. This is for example an LED on the external module controlled by the signal processing unit.
- the second solution which can be deployed as an alternative or in addition to the first solution, consists in converting the external module 200 into a connected object loT.
- the external module therefore integrates a radiofrequency communication module 70 configured to send data from the sensors or data on the identification of the larvae to a remote server, such as a cloud server.
- the cloud server hosts a database storing the data transmitted by the processing unit 70, and/or an application to give the user access to some or all of the data stored by the server, as well as to the results of identification of larvae in a plant.
- the application is accessible from a smartphone or a computer, and is configured to emit an alarm when a plant monitored by the system of the invention is infected.
- the system of the invention comprises a plurality of probes and external modules communicating with the server, each pair of probe and external module being identified at the level of said server and by the application.
- a couple will be assigned to each palm tree and the user of the system will receive precise notifications on the state of health of his plantation, in particular he will be able to identify which plants show signs of infection. It is thus possible to intervene only on infected plants and save the rest of a plantation from its destruction.
- the system is also very advantageous in that it is energy self-sufficient.
- the external module 200 comprises a battery 60 powering said external module 200 as well as the probe 100, and on the other hand said battery 60 is advantageously powered by means of a solar panel (not shown).
- the external processing unit also includes a radio frequency communication module configured to report the results of the larvae identification process and/or a data history to a remote server.
- the invention thus proposes a method and a system for detecting larvae making it possible to effectively detect an infection of the larvae in a plant, and the precision of which can be improved by taking into account one or more additional measurements.
- the invention therefore makes it possible to intervene quickly and only on the infected palm trees to administer a treatment against the infection, such as an injection of a compound toxic to the larvae.
- a treatment against the infection such as an injection of a compound toxic to the larvae.
- the invention therefore represents a solution of paramount importance for saving individual plants, but also for preventing the spread of infection in a plantation, or even in a region or country.
- farmers are reassured and major economic losses due to larvae infections in stemmed plants are avoided, such as losses caused by red weevil in global palm production.
- the system of the invention has an optimal functional architecture to provide reliable results, as well as being robust and autonomous.
- the present invention therefore provides a solution that can be massively deployed to monitor the state of health of large plantations.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Engineering & Computer Science (AREA)
- Insects & Arthropods (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Birds (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Catching Or Destruction (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Cultivation Of Plants (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR2104560A FR3122319B1 (fr) | 2021-04-30 | 2021-04-30 | Procédé et système de détection de larves dans un palmier |
PCT/EP2022/060600 WO2022229001A1 (fr) | 2021-04-30 | 2022-04-21 | Procédé et système de détection de larves dans un palmier |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4329486A1 true EP4329486A1 (fr) | 2024-03-06 |
Family
ID=77710825
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP22719597.1A Pending EP4329486A1 (fr) | 2021-04-30 | 2022-04-21 | Procédé et système de détection de larves dans un palmier |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP4329486A1 (fr) |
FR (1) | FR3122319B1 (fr) |
WO (1) | WO2022229001A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020217160A1 (fr) * | 2019-04-22 | 2020-10-29 | King Abdullah University Of Science And Technology | Algorithme de traitement de signal pour détecter des charançons de palmier rouge en utilisant une fibre optique |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6801131B2 (en) * | 2001-06-01 | 2004-10-05 | Trustees Of Stevens Institute Of Technology | Device and method for detecting insects in structures |
US7271706B2 (en) * | 2002-10-09 | 2007-09-18 | The University Of Mississippi | Termite acoustic detection |
DE102013219474A1 (de) * | 2013-09-26 | 2015-03-26 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Vorrichtung und verfahren zum erhalten einer information über ein oder mehrere lebewesen |
FR3025318A1 (fr) * | 2014-08-26 | 2016-03-04 | Daniel Vinsonneau | Systeme de detection de larves d'insectes dans les plantes |
US11754532B2 (en) * | 2018-06-05 | 2023-09-12 | King Abdullah University Of Science And Technology | Beetle detection using optical fiber distributed acoustic sensor |
WO2020217160A1 (fr) * | 2019-04-22 | 2020-10-29 | King Abdullah University Of Science And Technology | Algorithme de traitement de signal pour détecter des charançons de palmier rouge en utilisant une fibre optique |
-
2021
- 2021-04-30 FR FR2104560A patent/FR3122319B1/fr active Active
-
2022
- 2022-04-21 EP EP22719597.1A patent/EP4329486A1/fr active Pending
- 2022-04-21 WO PCT/EP2022/060600 patent/WO2022229001A1/fr active Application Filing
Also Published As
Publication number | Publication date |
---|---|
WO2022229001A1 (fr) | 2022-11-03 |
FR3122319B1 (fr) | 2024-09-13 |
FR3122319A1 (fr) | 2022-11-04 |
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