Thanate Khaorapapong

Thanate Khaorapapong
Prince of Songkla University · Department of Computer Engineering

About

23
Publications
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95
Citations

Publications

Publications (23)
Article
Full-text available
Despite many applications of computer vision for agricultural harvesting robots that focus on fruit detection, some agricultural applications are not well-developed, especially for natural rubber latex production. Tapping is a method to harvest rubber latex from the natural rubber trees (Hevea brasiliensis) which involves operating at night in Sout...
Article
Recently, an autonomous vehicle with 3D sensors for the rubber tree (Hevea brasiliensis) plantation navigation has been presented. Therefore, we present a machine vision for detecting the tapping position and the rubber juice collecting cup in the images, which can be deployed onto an autonomous platform. Firstly, we show an RGB-D image acquisition...
Article
Full-text available
In a trading market, price of oil palm (Elaeis guineensis) is negotiated depending some key parameters of the fresh fruit bunch (FFB). Inspectors have been hired by a buyer to grade FFB to accept or reject. The classification results made by human inspection are skeptical and not very reliable if workload is high. We have developed a system to grad...
Conference Paper
Recently, the dispenser system has been widely used for holding the electronic manufacture of many devices. It also need an accurate control of the amount of fluid and volume from the semi-conductor. This paper represents the modeling of screw pump dispenser using dc motor used Simulink™ from MATLAB. In the screw pump dispenser there is a very impo...
Conference Paper
The purpose of this paper was to develop an efficient and accurate classification for flesh aromatic coconuts in daylight by using image processing technique. In actual implementation, the brightness of daylight was not constant as a major problem that is affecting for the classification flesh aromatic coconuts. So we need to adjust the brightness...
Article
The analysis and design of a differential six-port reflectometer (SPR) based on a sampled-line structure is presented in this paper. The practical differential SPR is realized in Coplanar Strip (CPS) transmission line form, using two baluns for interfacing with the RF source and device under test (DUT) and four baluns connected to the RF logarithmi...
Article
Full-text available
In this paper, it is shown that extensive characterization and modeling of dielectric permittivity of rubber latex enables dry rubber content (DRC) to be accurately determined using a measurement at a single microwave frequency. The model is demonstrated in a low-cost sensing system based on a six-port reflectometer that is suitable for application...
Conference Paper
Human gait analysis has been widely used in many fields of work. Numerous sensor types are applied in gait analysis. Accelerometer is a sensor that is famous to use. Gait was previously analyzed based on time-dependent data from an accelerometer. This will face some problems when a test subject is walking at different speeds. To correct such proble...
Article
Full-text available
An ultrasonic technique was proposed to predict the oil content in fresh palm fruit by measuring the attenuation based on the ultrasonic transmission mode. Several palm fruit samples with known oil content determined by Soxhlet extraction (ISO9001:2008) were tested using ultrasonic measurement. Amplitude attenuation data results for all palm sample...
Article
Abnormal gait leads to falling which can cause of human's injury. Normally human has resembled gait cycle between walking. But if human has falling or abnormal walking that gait cycle is not resemble the normal walking. The walking gait can calculate the locus of the Zero Moment Point (ZMP) and the ZMP can be estimated by the signal from low-cost F...
Article
In this paper, an ultrasonic technique is proposed to predict oil content in a fresh palm fruit. This is accomplished by measuring the attenuation based on ultrasonic transmission mode. Several palm fruit samples with known oil content by Soxhlet extraction (ISO9001:2008) were tested with our ultrasonic measurement. Amplitude attenuation data resul...
Article
This paper present the classification of fresh aromatic coconuts into 3 types: single layer, double layer and one and a half layer by inspecting colors at the bottom of coconuts. We take the photos the bottom of coconuts in RGB mode, change the colors into the HSV mode, and then place 4 circles into the image. The 20 photos of each type are used to...
Article
This paper first investigates the effect of substrate temperature dependence on performances of six-port reflectometer (SPR) designed for measuring complexity permittivity. The temperature-dependent effect on the substrate is described by the variation of dielectric constant (έr) and dissipation factor (tanδ). Here, two printed circuit boards (RO30...
Conference Paper
Full-text available
This paper describes a motor control system for Robocup (small-size league) robot. Our aim was to build high performance robots at a minimal cost. We achieved a low-cost design with the use of cheap motors and use of small DC motors for speed feedback. All controls were completed by a single microcontroller. We also established predictive controlle...
Conference Paper
This paper presents a fuzzy logic controller using in the position control of an induction motor for a bending and cutting machine. An 8-bit single chip microprocessor is used for low cost and high reliability. With help of MATLAB/Simulink, computer simulation is first done to assess the feasibility of the system proposed. Simulation results are ve...
Conference Paper
This paper presents the comparison between four fractional power order transfer function models of a rotor bar. The first model arises in the implicit form with one zero, one integer power pole and one fractional power order pole, the second model is in the explicit form with one integer power zero, the third model and the fourth model are in the e...
Article
Full-text available
The objective of this paper is to propose a synthesis of some Thai monophthongs by basic articulatory synthesis. In this paper we first describe human speech production mechanism. After that we mention articulatory synthesis method. Our basic idea is to model the human articulators and vocal cords. The articulators are usually modeled with a set of...
Article
Full-text available
Tone classification is a necessary part for Thai speech recognition. This paper present the work based on our former work described in our published paper ref. [1] and the published paper ref. [2]. Several configurations of tone classification front-end for large vocabulary Thai speech corpus are implemented and compared. They include the tone-crit...

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Projects

Projects (3)
Project
Tapping path detection and 3D path generation algorithms
Project
Develop a blueprint design for manufacturing DRC measurement system