Watanachaturaporn, Pakorn

Loading...
Thumbnail Image
Preferred name
Watanachaturaporn, Pakorn
Alternative Name
Watanachaturaporn, P.
Main Affiliation
Email
pakorn.wa@kmitl.ac.th

Settings

Now showing 1 - 2 of 2
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Temperature Compensation for Transformer-type Transducer
    (2021-01-01)
    Songsuwankit, Kanoknuch
    ;
    Riewruja, Vanchai
    ;
    Watanachaturaporn, Pakorn
    ;
    Rerkratn, Apinai
    ;
    Petchmaneelumka, Wandee
    A novel technique to compensate the temperature effect of a transformer-type transducer is proposed in this paper. The effect of the ambient temperature on the transformer-type transducer is investigated from a primary-winding current. The advantage of the proposed technique is that the temperature effect is compensated without requiring a temperature sensor, making it suitable for applications in robotic and automation systems operated in harsh environments. The primary-winding current of the transducer is generated using a second-generation current conveyor (CCII). The excitation signal of the transformer-type transducer is driven by the CCII and the current flowing through the primary winding is transferred to an output signal of the CCII. The deviation of the primary-winding current due to the temperature effect is evaluated from the output signal of the CCII. The temperature effect on the transducer is manipulated by a closed-loop principle using a subtract-and-sum action instead of a traditional proportional-plusintegral action to eliminate the deviation of the primary-winding current. Therefore, the temperature effect on the transducer is compensated. A linear variable differential transformer (LVDT) is used to demonstrate the proposed technique, whose performance is discussed in detail and confirmed experimentally. All devices used in this experiment are commercially available. Experimental results show that the measured error of the output signal from the LVDT at 70 C can be reduced from 6.2% without temperature compensation to 0.06% by using the proposed technique, which has the advantages of a low cost, simple configuration, and high performance.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    A Design and Implementation of an Emergency Message Beacon System Using APRS Protocol
    (2020-06-01)
    Hongyim, Nimit
    ;
    Watanachaturaporn, Pakorn
    A design and implementation of an Emergency Message Beacon System (EMBS) using the Automatic Position Reporting System (APRS) protocol is presented in this paper. The EMBS benefits from widely distributed radio network where modern wireless network infrastructure is unavailable such as on open seas or in the middle of jungle. The main concept of the design is that the system an immediate beacon containing current location is transmitted when activates the unit and automatically sends interval beacons to report location, system status, and an instant message. The unit works with either an existing or impromptu APRS ad-hoc networks. The system is designed to transmit low RF power and expected a minimum coverage of at least two kilometers in radius, which is the worst situation case of Line of Sight (LOS) communication. The experimental result shows that the unit can establish radio connection to another station at a range of 2.1 kms. Link budget analysis is theoretically validated the communication.