COMMUNICATION DEVICE AND COMMUNICATION SYSTEM USING THE SAME

• Main Authors: ITO SUSUMU, LI RAN, MIZUTA TOMOAKI, OI MOTOHIRO, GOSHONOO KAZUHIKO
• Format: Patent
• Language: English; Japanese
• Published: 12.01.2017
• Subjects: ALARM SYSTEMS; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; ORDER TELEGRAPHS; PHYSICS; SIGNALLING; SIGNALLING OR CALLING SYSTEMS; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

PROBLEM TO BE SOLVED: To reduce the possibility of erroneously obtaining data included in a communication signal.SOLUTION: A communication device 10 (slave unit 1) comprises a reception unit 11 and a control unit 13. The reception unit 11 is electrically connected with a pair of electric wires 41A and 41B, receives a communication signal S1 transmitted by a change of voltage Vt1 applied to between the pair of electric wires 41A and 41B, and outputs a reception signal corresponding to the communication signal S1. The control unit 13 monitors the presence or absence of a rising edge of the reception signal in a first determination period, monitors the presence or absence of a falling edge of the reception signal in a second determination period, thereby determines a bit in data included in the communication signal S1, and obtains the data. Then, the control unit 13 sets timing of each of the first determination period and the second determination period on the basis of the pulse width of a start bit in the reception signal.SELECTED DRAWING: Figure 1 【課題】通信信号に含まれるデータを誤って取得する可能性を低減する。【解決手段】通信装置１０（子機１）は、受信部１１と、制御部１３とを備えている。受信部１１は、一対の電線４１Ａ，４１Ｂに電気的に接続され、一対の電線４１Ａ，４１Ｂ間に印加される電圧Ｖｔ１の変化により送信される通信信号Ｓ１を受信して通信信号Ｓ１に応じた受信信号を出力する。制御部１３は、第１判定期間での受信信号の立ち上がりの有無を監視し、かつ第２判定期間での受信信号の立ち下がりの有無を監視することで、通信信号Ｓ１に含まれるデータのビットを判定し、データを取得する。そして、制御部１３は、受信信号におけるスタートビットのパルス幅に基づいて、第１判定期間および第２判定期間の各々のタイミングを設定する。【選択図】図１