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Growth stage detection for food consumption management in smart cricket farming using a deep learning technique
(2025-11-01)
Nutnoi, Nitipoom
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Yindeesuk, Witoon
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Kamoldilok, Surachart
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Srinuanjan, Keerayoot
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Limsuwan, Pichet
This research proposed a novel method for tracking and predicting the growth stages of two-spotted crickets, reared in a temperature-controlled box at different growth stages using the YOLOv5s model. The images of crickets feeding inside the rearing box were taken with an infrared camera above the feeding point every hour. Images of the cricket were used to train a YOLOv5s model to detect crickets for each growth stage in the rearing box. The experimental results showed that the trained deep learning had an average accuracy of 95.7%. The relationship between the ratio of crickets at each growth stage throughout the 45-day rearing period was plotted and discussed. The results also showed a clear relationship between the amount of food consumed by crickets per day and their growth stage, which could be useful for appropriately managing food consumption according to the growth stage of crickets.
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Electronic nose ammonia gas monitoring via IoT system for Chlorella sp. cultivation
(2023-01-01)
Srinuanjan, Keerayoot
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Kruakuanphet, Aphichaya
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Phongwisit, Phachara
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Yindeesuk, Witoon
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Kamoldilok, Surachart
In this paper, we present an electronic nose ammonia gas monitoring via IoT system for Chlorella sp. cultivation. The MQ–137 gas sensor module is selected as the primary sensor for measuring ammonia gas concentration. The pH sensor module is the sensor for measuring the pH levels in Chlorella sp. ponds. The MQ–137 gas sensors are calibrated with a known concentration of ammonia gas in the calibration box. Calibration conditions are set corresponding to low concentration of ammonia gas produced by Chlorella sp. cultivation. The pH sensor module is calibrated against a standard pH buffer. The calibration data obtained from the calibration method is input into computer programming and processed by the ESP8266 microprocessor. After calibration, the MQ–137 gas sensor and pH sensor modules are used to measure the ammonia gas concentration and pH levels in the Chlorella sp. ponds. Chlorella sp. is cultivated under three conditions of light intensity, natural light with an average light intensity of 1521 Lux, and artificial light with a light intensity of 1000 Lux and 2000 Lux, respectively. The ammonia gas concentration and pH levels of Chlorella sp. cultivation are transferred to the cloud system and displayed via the IoT system. And the system can also send a notification to a smartphone when ammonia gas concentration and the pH levels reach the specified value.
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An application of reflective holographic gratings for measurement of cylindrical curvature
(2022-01-07)
Inneam, Chanikan
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Srinuanjan, Keerayoot
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Yindeesuk, Witoon
This paper presented an application of reflective holographic gratings for the measurement of cylindrical curvature. The surface of the fabricated holographic grating was coated with gold by the sputtering method, where it became a reflective holographic grating. The grating was attached to the surface of various radius cylindrical objects. The diffraction pattern produced by the bent grating with different radius was observed by illuminating a laser beam normal to the grating surface. The gratings constant were calculated from the observed diffraction pattern. The relationship between the grating constants and the radius of cylindrical objects was obtained. The grating constant and the reciprocal of the radius of cylindrical objects was a linear relationship, with the least R-square between 0.85-0.97. Moreover, the y-intercept of the relationship between the grating constants and the reciprocal radius was consistent with the grating constant of the non-bended grating. As the radius of the grating approach is infinite, the reciprocal of the radius approaches zero, which is a non-bend grating. We can apply this method to measure the radius of cylindrical objects.
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Design and simulation of asymmetric Y-junction beam splitter with controllable splitting based on adjusted air-hole defect
(2022-01-01)
Phongwisit, Phachara
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Kamoldilok, Surachart
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Buranasiri, Prathan
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Srinuanjan, Keerayoot
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Limsuwan, Pichet
We report a construction of a new asymmetric Y-junction beam splitter with a controllable splitting ratio and simulate this splitter. The splitter is based on InP, has the area 65.0 µm<sup>2</sup> and operates at the light wavelengths 1.48 and 1.55 µm. Under condition of no air-hole defect, the splitting ratio for the output ports 1 and 2 is equal to 92/8 at the both wavelengths. To control the splitting ratio, air-hole defects with different (diamond, square and cylinder) shapes are introduced at the junction between the two output ports. Our simulations confirm that the splitting ratio of the beam splitter can be efficiently controlled by changing the size and the shape of the air-hole defect. The maximal splitting ratios at our operating wavelengths are equal to 10/90 and 14/86 and the appropriate average insertion losses amount to 0.36 and 0.31 dB for all of defect shapes.
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Dry film Holographic grating based on computer-generated mask Lithography
(2022-01-01)
Inneam, Chanikan
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Tipawan Khlayboonme, S.
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Kitiwan, Mettaya
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Yindeesuk, Witoon
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Srinuanjan, Keerayoot
This paper presented an alternative technique for fabricating the dry film holographic grating based on a mask generated by computer simulation and experimental results. The mask was generated by a fringe pattern which is created by the mathematical model of two beams interference with various angles. Computer simulation of the fringe pattern was printed on film, i.e., the holographic grating mask. The mask was attached on dry film and then illuminated by UV light, where the lithography technique was applied. According to the lithography technique, the computer-generated holographic grating mask was transferred to dry film. After fabrication, fringe patterns obtained from the grating were observed. Then, the grating period was analyzed and confirmed by Scanning Electron Microscope (SEM). Experimental results show that the method could apply to fabricate the dry film holographic grating.
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Multi-range Ammonia Gas Sensor Control and Monitor via IoT System
(2022-01-01)
Kruakuanphet, Aphichaya
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Phongwisit, Phachara
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Yindeesuk, Witoon
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Kamoldilok, Surachart
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Srinuanjan, Keerayoot
In this paper, we present a multi-range of ammonia gas concentration control and monitoring via IoT system. We can select the ammonia gas concentration measurement range by adjusting load resistance within the voltage divider circuit. The appropriate measurement range, which corresponds to the concentration of ammonia gas produced by agricultural and industrial activities, can control and monitor via Blynk application. The MQ-137 gas sensor is selected as the main sensor, and each load resistance condition within the voltage divider circuit is calibrated with known ammonia gas concentration inside a calibration box. The calibration data is input into computer programming and processed by ESP8266 microprocessor. After calibration, we obtained a multi-range ammonia gas sensor suitable for measuring the ammonia gas concentration for each concentration range. The experiment showed that load resistance affects the measurement accuracy of ammonia gas concentration. We can select the load resistance suitable for the ammonia gas concentration and display on a smartphone via IoT system.
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Fabrication of holographic grating by alternative setting of michelson interferometer
(2021-01-28)
Inneam, Chanikan
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Srinuanjan, Keerayoot
This paper presents the method and experimental results of the fabrication of holographic grating. The holographic grating was fabricated by using an alternative setting of Michelson Interferometer. In general, the interference pattern produces by Michelson interferometer is a circle fringe pattern. By an alternative setting of the interferometer, we could obtain a fringe pattern that has a linear shape. The angles between the two arms of Michelson interferometer, cross-beam angle, were adjusted until a linear interference pattern occurs. The interference pattern was projected onto a screen where a photoresist film is located. The photoresist film functional as a collective material of an interference pattern, i.e., a holographic grating. The film is developed and then fixed by a chemical process. By the chemical process, the holographic grating is permanence recorded on the film. After the fabrication process, we analyzed the physical properties of the holographic grating. We also measured the grating space by Scanning Electron Microscope (SEM). Relationships between cross-beam angles and grating space are shown and discussed. Experimental results show that we could apply the proposed method to fabricate a holographic grating.
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Characterization of blade Bragg grating modeling with different incident angle profiles for strain sensor applications
(2014-10-09)
Cheamanunkul, Niparat
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Srinuanjan, Keerayoot
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Yupapin, Preecha P.
This paper presents some preliminary results of sensing properties of single-mode silica blade Bragg gratings model which is coated by a poly(methyl methacrylate). The proposed mathematic model of blade Bragg gratings consists of alternated periodic slabs waveguide with inclined angle and is analyzed by using the principle of multilayer transfer matrix for photonic crystal. By varying the incident angle, the slabs angle, the proposed model is simulated for all of the parameters, regarding to the sensor applications. The simulation results were shown and discussed. According to the simulation results, this model can be used for sensitive stain sensor applications.
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Two dimension photonic crystal Y-branch beam splitter with variation of splitting ratio based on hybrid defect controlled
(2014-10-09)
Chantakit, Teanchai
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Srinuanjan, Keerayoot
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Yupapin, Preecha P.
This article represents a new Y-branch hybrid design of 2D photonic crystal with defect control. The structure is made of hexagonal arrays of InP nano-rods surrounded by air. This system is comprised of a modified add/change to a polymethylmethacrylate (PMMA) rod, which can be applied to the beam splitter selection device. The optical properties and radial of PMMA defect rods have been transfigured. By selecting an appropriate temperature, a change of refractive index and expanded radius are occurred. The obtained results have shown that the selected optical amplitude in a hybrid semiconductor-polymer Y-branch can be separated to 50–50, 60–40 and 67–33 % at wavelength 1.557 µm. Both of the photonic band gap and transmission spectra are calculated by using 2D finite different time domain (FDTD) method via OptiFDTD software. Such a device can be useful for photonic crystal switching devices in the integrated optical circuit.
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Accurate RMS calculations for periodic signals by Trapezoidal rule with the least data amount
(2013-11-12)
Poomjan, Sompop
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Taengtang, Thammarat
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Srinuanjan, Keerayoot
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Kamoldilok, Surachart
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Buranasiri, Prathan
The purpose of this research is to present a simple method using the least data amount to calculate root mean square (RMS) values of periodic signals (constructed from Fourier series) which the highest harmonic order is known or able to be estimated. In the research, trapezoidal rule with the least data amount was proved and tried to calculate definite integral values of sinusoidal signals from a lot of trial runs until a significant property was found. Then the property would be deployed to calculate RMS values. Results of the research can provide not only more convenient processes of simple trapezoidal rule but also more accurate results than the patented Simpson's rule in the same least data amount. © 2013 Sompop Poomjan et al.

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