• Title/Summary/Keyword: Sensor transmitter

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A study on the design of the transmitter-receiver of fuze sensor for discriminating target position (표적위치식별 신관센서 송수신장치 설계에 관한 연구)

  • 최재현
    • Journal of the Korea Institute of Military Science and Technology
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    • v.5 no.2
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    • pp.159-168
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    • 2002
  • In this paper, a study on the design of the transmitter-receiver of fuze sensor for discriminating target position is presented. We propose the algorithm for detecting target distance/direction through investigating the operational concept and principle of fuze sensor. Based on the algorithm, We design transmitter-receiver, calculate various design variables and estimate the performance of that one. The estimated result shows that the required performance of fuze sensor is satisfied. Further research on confirming the performance of proposed algorithm through encounter simulation test with real target and resolving problem will be continued.

A Dust Detection Sensor System for Improvement of a Robot Vacuum Cleaner (청소 로봇 성능 향상을 위한 먼지 검출 시스템)

  • Kim, Dong-Hoe;Min, Byung-Cheol;Kim, Donghan
    • Journal of Institute of Control, Robotics and Systems
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    • v.19 no.10
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    • pp.896-900
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    • 2013
  • In this paper, we develop a dust detection sensor system capable of identifying types of dust for an improvement of a robot vacuum cleaner. The dust detection sensor system is composed of a set of infra-red sensors: a single transmitter and multiple receivers. Given the fixed amount of light transmitted from the transmitter, the amount of light coming in multiple receiver sensors varies, depending on the type and density of dust that is passing between the transmitter and the receivers. Therefore, the type of dust can be identified by means of observing the change of the amount of light from the receiver sensors. For experiments, we use two types of dust, rice and sesame, and validate the effectiveness of the proposed method.

A study on Non-contacted Transmitter Switch for Vehicle (비 접촉식 차량용 Transmitter Switch에 관한 연구)

  • Ahn, Jong-Young;Kim, Young-Sub;Kim, Sung-Su;Hur, Kang-In
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.10 no.5
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    • pp.245-249
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    • 2010
  • Now normally using a contact method of vehicle Inhibitor Switch that is use direct voltage level signal. This method is good solution for signal deliverly. but The contacted method have a short lifetime because of deterioration of contact surface. so we suggest to non-contacted method using magnetic sensor. The magnetic sensor is used to non-contacted method that is solution for problem of contacted method. In this paper using that of magnetic sensor feature, so we applied to Vehicle Transmitter switch that of non-contacting method. Sensor voltage outputs have variable electric potential that normally 0 mV to 150 mV, and it is depend on Switch Angle. we used two differential sin wave for switching of 5 state signal.

Development of a Pet Robot Chasing a Moving Person in Outdoor Environment

  • Ahn, Cheol-Ki;Lee, Min-Cheol;Aoshima, Nobuharu
    • International Journal of Precision Engineering and Manufacturing
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    • v.6 no.4
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    • pp.67-72
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    • 2005
  • In a park or street, we can see many people jogging or walking with their dogs that are chasing their masters. In this study, a pet robot that imitates dog's behavior is developed. The task of robot is to chase a person who is recognized as the master. The physical structure and the sensor system are designed for the task and environment. A three-wheel type locomotion system is designed as the robot's physical structure which can follow a person who is jogging in outdoor environment like a park. A sensor system, which can detect relative position of the master to the robot in highly dynamic and hazardous worlds, is developed. This sensor system consists of a signal transmitter which is held by the master and ultrasonic sensor array which are mounted on the robot. The transmitter emits RF (radio frequency) and ultrasonic signals simultaneously. The ultrasonic sensor array detects the signals and calculates direction and distance between the robot and the transmitter. The developed RF-ultrasonic sensor is evaluated through experiments. A purely reactive behavior-based control architecture is used for the robot. The behavior control performance of the robot is assessed in outdoor and indoor tests.

Developmemt of automobile sensor monitoring system (자동차 센서 모니터링 시스템 개발)

  • Choi, Nakg-Won;Lee, Sang-Hoon
    • Journal of Sensor Science and Technology
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    • v.14 no.3
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    • pp.150-155
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    • 2005
  • We propose a newly developed automobile sensor monitoring system incorporated with a tire pressure monitoring sensor(TPMS). The RF-transmitter based on a tire pressure sensor, sends a frame data about measured tire-pressure to RF receiver. And the various sensing signals based on sensors such as fuel-level sensor, engine oil level sensor and temperature sensors, are converted into 10-bit digital data. The microprocessor displays converting data such as tire pressure, trip distance, fuel quantity, coolant temperature and car-room temperature, on LCD panel. The proposed system can be successfully adapted to monitoring of the tire pressure and various automobile sensors.

A Study on Effective Output Control Technique for Rotational Transmission Beam Drive of Sonar Transmitter (소나 송신기의 회전 송신빔 구동을 위한 효율적인 출력 제어 기법 연구)

  • Lee, Byung-Hwa
    • The Journal of the Acoustical Society of Korea
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    • v.31 no.5
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    • pp.280-287
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    • 2012
  • This paper presents a study on the experimental analysis of the impedance characteristics according to the rotational direction of the transmission beam of a cylindrical sensor array. Besides, this suggests a real time control technique of the transmitter output for the effective maximum power transmission, in order to drive efficiently the rotational transmission beam of the active sonar transmitter. The output characteristics of the transmitter and the real-time impedance variations of the sensor array are analyzed under the overload conditions. They are caused by electric and acoustic boundary conditions when the rotational transmission beam is operated. From these results, a new output control method of the transmitter is proposed to protect the transmitter and its loads. It can maximize the output power without the transmission pause even if the transient phenomena occur. The proposed technique is verified from the experiment.

Wall and Corner Recognition Method for Indoor Autonomous Mobile Robot (실내 자율주행 로봇을 위한 벽과 모퉁이 인식방법)

  • Lee, Man-Hee;Cho, Whang
    • Proceedings of the KIEE Conference
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    • 2004.11c
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    • pp.529-531
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    • 2004
  • For localization, it is very important for an autonomous mobile robot to be able to recognize indoor environment and match an object it detect to an object within a map developed either online or offline. Given the map defining the locations of geometric beacons like wall and comer existing in the robot operation environment, this paper presents a stereo ultrasonic sensor based method that can be conveniently used in recognizing the geometric beacons. The stereo ultrasonic sensor used in the experiment consists of an ultrasonic transmitter and two ultrasonic receivers placed symmetrically about the transmitter. Experiment shows that the proposed method is more efficient in recognizing wall and coner than the conventional method of using multiple number of transmitter-receiver pairs.

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Indoor Environment Recognition Method for Indoor Autonomous Mobile Robot (실내 자율주행 로봇을 위한 실내 환경 인식방법)

  • Lee Man-Hee;Cho Whang
    • The Transactions of the Korean Institute of Electrical Engineers D
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    • v.54 no.6
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    • pp.366-371
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    • 2005
  • For an autonomous mobile robot localization, it is very important for the robot to be able to recognize indoor environment and match a detected object to an object defined within a map developed either online or of offline. Given the map defining the locations of geometric beacons like wall and corner existing in the robot operation environment, this paper presents a stereo ultrasonic sensor based method practically applicable in recognizing the geometric beacons in real-time. The stereo ultrasonic sensor used in the experiment consists of an ultrasonic transmitter and two ultrasonic receivers placed symmetrically about the transmitter Experimental results are provided to demonstrate that the proposed method is more efficient in recognizing wall and coner than the conventional method of using multiple number of transmitter-receiver pairs.

Design and Fabrication of 1.2GHz range RF Transmitter and Receiver for Bi-directional Capsule Endoscopes (양방향 캡슐형 내시경용 1.2GHz 대역 RF 송수신기 설계 및 제작)

  • 장경만;문연관;류원열;윤영섭;조진호;최현철
    • Proceedings of the IEEK Conference
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    • 2003.11c
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    • pp.81-85
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    • 2003
  • The Bi-directional Wireless Capsule endoscope con sists of CMOS Image sensor, FPGA, LED, Battery, DC to DC Converter, Transmitter, Receiver and Antennas. The RF transmitter at 1.2GHz range is designed and fabricated with 10 mm(diameter)x1.6 mm(thickness) dimension considering the maximum permission exposure(MPE), system size, power consumption, linearity and modulation method. The fabricated RF receiver at 400MHz range can demodulate the external signals so as to control the behavior of CMOS image sensor. four LEDs and Transmitter.

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A Study on the Transmitter Design for Transmitting Output Power Enhancement of Active Magnetic Sensor (능동형 자기센서의 송신출력 향상을 위한 송신기 설계에 관한 연구)

  • Chung, Hyun-Ju;Yang, Chang-Seob;Jeon, Jae-Jin
    • Journal of the Korean Magnetics Society
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    • v.23 no.5
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    • pp.159-165
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    • 2013
  • A active magnetic sensor has been widely used in the underwater guided weapon system because it is able to detect a target accurately in close range, but the target doesn't have any good countermeasure to overcome the threat from the active magnetic sensor. Recently, in order to increase the damage area of target by shock wave with explosion of the underwater weapon system and to detect small target, the maximum target detection range of the active magnetic sensor needs to be increased. One method for improving maximum target detection range is to improve output power from transmitter through demagnetization factor minimization of a transmitting core. Thus, in this paper, we describe the study results on the transmitter core shape design to enhance output power of the active magnetic sensor.