EP0450799A2 - Sender-Empfängeranlage für Fernsteuerung - Google Patents

Sender-Empfängeranlage für Fernsteuerung Download PDF

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Publication number
EP0450799A2
EP0450799A2 EP91302391A EP91302391A EP0450799A2 EP 0450799 A2 EP0450799 A2 EP 0450799A2 EP 91302391 A EP91302391 A EP 91302391A EP 91302391 A EP91302391 A EP 91302391A EP 0450799 A2 EP0450799 A2 EP 0450799A2
Authority
EP
European Patent Office
Prior art keywords
group
pulses
pulse
command signal
data pulses
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.)
Ceased
Application number
EP91302391A
Other languages
English (en)
French (fr)
Other versions
EP0450799A3 (en
Inventor
Kudo Takaaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHOWA R AND D CO Ltd
Original Assignee
SHOWA R AND D CO Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SHOWA R AND D CO Ltd filed Critical SHOWA R AND D CO Ltd
Publication of EP0450799A2 publication Critical patent/EP0450799A2/de
Publication of EP0450799A3 publication Critical patent/EP0450799A3/en
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C15/00—Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path
    • G08C15/06—Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path successively, i.e. using time division
    • G08C15/12—Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path successively, i.e. using time division the signals being represented by pulse characteristics in transmission link
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C23/00—Non-electrical signal transmission systems, e.g. optical systems
    • G08C23/04—Non-electrical signal transmission systems, e.g. optical systems using light waves, e.g. infrared

Definitions

  • This invention relates to a remote control transmit-receive system including a remote controller, capable of effecting high-quality transmission and reception of various command signals by using infrared rays, high-frequency waves, ultrasonic waves as a carrier wave irrespective of disturbance noises such as noises which are periodically generated from a fluorescent lamp or other possible atmospheric noises.
  • the invention further relates to a method of digital data transmission.
  • reference numeral 5 denotes a filter disposed in front of the sensor element 3.
  • the blocking member 4 as noted above would not necessarily be adapted to various situations in which the transmitter unit 6 is placed and is not satisfactory.
  • the aforementioned blocking member does not effectively shield the light from the fluorescent lamp.
  • the filter 5 disposed in front of the sensor element is not very useful because the wave length of the command signal is substantially equal to that of the light emitted from the fluorescent lamp.
  • the noises can be eliminated, whereas the command signal would be affected by the noise when the remote controller is further away from the receiving device.
  • the disturbance noise becomes large in intensity relative to the command signal the noise is superposed upon the command signal and makes it impossible to decode the command signal.
  • the conventional remote controlling method has suffered a disadvantage that the efficiency of decoding the command signal issued from the remote controller cannot be increased even if the number of repetitions of the command signal is increased.
  • An object of the present invention is to provide a remote control transmit-receive system capable of effecting high-quality transmission and reception of command signals without being affected by disturbance noises such as the light of a fluorescent lamp.
  • a remote transmit-receive system characterised in that it comprises a transmitter unit adapted to issue a command signal consisting of header pulses including a reference header pulse and data pulses subsequent to the header pulses, said data pulses each representing a digital value 1 or 0 so as to form a code pattern and occuring at inherent pulse intervals that are selected in accordance with their own digital values in such a manner that to each of a predetermined number of said code patterns there corresponds a given time length from a first pulse to a last pulse of a group of said data pulses defining the pattern, and a receiver unit adapted to receive and decode said command signal from said transmitter unit by finding said first pulse of said data pulses from said reference header pulse in said command signal and measuring said time length between said first and last pulses of said group of data pulses to reproduce said code pattern.
  • the time length from the first pulse to the last pulse of the data pulses is obtained by the sum total of the pulse intervals between the successive data pulses. Even if disturbance noise enters into the command signal to indispose one or more data pulses, the code pattern peculiar to the command signal transmitted from the transmitter unit can be decoded on the receiver side from the time length of the data pulses.
  • the first pulse of the data pulses can easily be perceived from the reference header pulse.
  • the code pattern of the command signal issued from the transmitter unit can readily be recognized from the time length between the first and last pulses of the data pulses even if one or more data pulses are affected by the disturbance noise, because each of the data pulses is formed with its own digital value 1 or 0 and transmitted at the inherently determined pulse interval significant of the digital value.
  • Figure 1 is an explanatory diagram showing the state in which a conventional remote-controller is used
  • Figures 2(A) and 2(B) are explanatory diagrams showing a train of data pulses and the results of decision in the prior art remote-controller
  • Figures 3(A), 3(B) and 3(C) are explanatory diagrams showing the waveforms of a command signal issued from a transmission side, a noise component, and the command signal received on a reception side in a system according to the present invention.
  • Figures 3(A), 3(B) and 3(C) show a command signal transmitted from a transmission side, noise component, and the command signal received on a reception side.
  • the command signal transmitted from a transmitter unit consists of a series of pulses such as four header pulses H1, H2, H3 and H4 and data pulses D1, D2 and D3 following the header pulses.
  • the data pulses are significant of a code pattern and repeatedly outputted several times.
  • the pulse intervals between the adjacent pulses of the header pulses H1-H4 and the time length in which the header pulses occur are previously determined.
  • the data pulses D1 to D3 are determined on the basis of the header pulse H4 serving as a reference header pulse so that the first data pulse D1 is positioned as separated from the reference header pulse H4 with the time length (A).
  • the data pulses D1 to D3 each representing a digital value 1 or 0 have their own inherent pulse intervals determined by the digital values and the sequence thereof so as to signify a code pattern of the command signal with the sum total of the pulse intervals (B) between the adjacent pulses of the data pulses.
  • TABLE 1 shows the pulse intervals of the data pulses D1-D3, which are prescribed according to the sequence and digital value 1 or 0 provided for each data pulse.
  • the pulse interval from the first pulse to the second pulse is determined to 1.8ms, and when the second pulse is "1", the pulse interval from the second pulse to the third pulse is 2.9ms.
  • TABLE 2 shows the relations between the code pattern of the command signal to be issued from the transmitter unit and the sum total of the pulse intervals from the first to the last pulses of the data pulses.
  • the sum total of the pulse intervals of the data pulses is peculiar to the command signal, and therefore, the code pattern of the command signal can be identified from the sum total of the pulse intervals mentioned above.
  • the code pattern of the command signal can be decoded by the sum total of the pulse intervals of the data pulses. That is to say, since the first pulse D1 of the data pulses is prescribed in position on the basis of the time length (A) from the reference header pulse H4 to the first pulse D1, the time length (B) for the data pulses D1 to D3 can be obtained by regarding the first pulse D1 of a second group of data pulses as the end point. From the time length (B) there can be identified the code pattern of the command signal in comparison with the prescribed code pattern as specified above.
  • the foregoing embodiment employs the data pulses consisting of three digits as one command, the number of digits is not restricted. Four or more digits may be of course used as a command.
  • TABLE 3 and TABLE 4 show another embodiment in which four digits are used as a command.
  • code patterns of a command signal issued from a transmitter unit are prescribed with the sum total of pulse intervals of data pulses constituting the command signal so as to determine a peculier time length for each code pattern. Therefore, the command signal can be decoded by collating the sum total of the pulse intervals of data pulses received by a receiver unit with predetermined reference code pattern represented by time lengths for data pulses, even if the command signal issued from the transmitter unit is affected by disturbance noise.
  • the first pulse of the data pulses issued as the command signal can easily be recognized from a reference header pulse of header pulses issued prior to the data pulses.
  • the reference code patterns are predetermined in the form of time lengths in accordance with the digit informations of "1" and "0" and the sequence of the respective data pulses so as to facilitate the formation of the code patterns for identifying the command signal.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Selective Calling Equipment (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
EP19910302391 1990-03-20 1991-03-20 Remote control transmit-receive system Ceased EP0450799A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP7118490A JPH03270596A (ja) 1990-03-20 1990-03-20 リモートコントロール送受信方式
JP71184/90 1990-03-20

Publications (2)

Publication Number Publication Date
EP0450799A2 true EP0450799A2 (de) 1991-10-09
EP0450799A3 EP0450799A3 (en) 1992-04-22

Family

ID=13453317

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910302391 Ceased EP0450799A3 (en) 1990-03-20 1991-03-20 Remote control transmit-receive system

Country Status (2)

Country Link
EP (1) EP0450799A3 (de)
JP (1) JPH03270596A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016127809A1 (zh) * 2015-02-09 2016-08-18 张春雨 一种基于微处理器的红外信号解码方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100694220B1 (ko) 2005-09-23 2007-03-14 삼성전자주식회사 잡음 방지를 위한 원격 제어 시스템 및 그 방법
CN101685576B (zh) * 2008-09-28 2013-01-02 康佳集团股份有限公司 红外线遥控器、红外线遥控信号的产生方法
CN109345806B (zh) * 2018-11-01 2020-11-17 常州弘度智能科技有限公司 一种应用于无线遥控器的抗干扰编解码方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2579038B1 (fr) * 1985-03-15 1987-05-22 Telecommunications Sa Perfectionnement aux systemes de reception de messages transmis par modulation en position d'impulsions (ppm)
JPS62267807A (ja) * 1986-05-16 1987-11-20 Alps Electric Co Ltd 自動車用遠隔制御装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016127809A1 (zh) * 2015-02-09 2016-08-18 张春雨 一种基于微处理器的红外信号解码方法

Also Published As

Publication number Publication date
EP0450799A3 (en) 1992-04-22
JPH03270596A (ja) 1991-12-02

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