阅读说明：本技术 通信装置、通信方法以及程序 (Communication device, communication method, and program ) 是由 小竹弘晃 石原正裕 于 2017-06-16 设计创作，主要内容包括：通信装置(200)经由电源线(111)、信号线(113)以及共用线(112)与其它通信装置(300)连接。通信装置(200)具备检测部(220)和通信部(230)。检测部(220)检测在用于与电源线(111)连接的第1端子(201)和用于与共用线(112)连接的第2端子(202)之间施加的交流电压的相位。通信部(230)通过除了由检测部(220)检测的相位处于特定的范围内时以外,执行通过包括信号线(113)和共用线(112)的电路的开闭而生成的电流信号的发送和接收中的至少一方,由此与其它通信装置(300)进行通信。特定的范围是由于交流电压在信号线(113)中流过比基准值大的感应电流的范围。(The communication device (200) is connected to another communication device (300) via a power line (111), a signal line (113), and a common line (112). A communication device (200) is provided with a detection unit (220) and a communication unit (230). A detection unit (220) detects the phase of an alternating voltage applied between a 1 st terminal (201) for connection to a power supply line (111) and a 2 nd terminal (202) for connection to a common line (112). The communication unit (230) performs communication with another communication device (300) by performing at least one of transmission and reception of a current signal generated by opening and closing of a circuit including the signal line (113) and the common line (112), except when the phase detected by the detection unit (220) is within a specific range. The specific range is a range in which an induced current larger than a reference value flows in the signal line (113) due to the alternating voltage.)

1. A communication device connected to another communication device via a power line, a signal line, and a common line, the communication device comprising:

a detection unit that detects a phase of an alternating-current voltage applied between a 1 st terminal for connection with the power supply line and a 2 nd terminal for connection with the common line; and

a communication unit that performs communication with the other communication device by performing at least one of transmission and reception of a current signal generated by opening and closing of a circuit including the signal line and the common line, except when the phase detected by the detection unit is within a specific range,

the specific range is a range in which an induced current larger than a reference value flows in the signal line due to the alternating voltage.

2. The communication device of claim 1,

the communication means transmits the current signal except when the phase detected by the detection means is within the specific range, and transmits an invalid signal when the phase detected by the detection means is within the specific range, thereby performing communication with the other communication device.

3. The communication device of claim 1 or 2,

the communication unit receives the current signal except when the phase detected by the detection unit is within the specific range, and discards the received signal when the phase detected by the detection unit is within the specific range, thereby performing communication with the other communication device.

4. The communication device of any one of claims 1 to 3,

the communication unit adjusts the width of the specific range.

5. A communication method performed by a communication apparatus connected to other communication apparatus via a power line, a signal line, and a common line, wherein,

performing at least one of transmission and reception of a current signal generated by opening and closing of a circuit including the signal line and the common line, except when a phase of an alternating-current voltage applied between a 1 st terminal for connection with the power supply line and a 2 nd terminal for connection with the common line is within a specific range, thereby communicating with the other communication apparatus,

the specific range is a range in which an induced current larger than a reference value flows in the signal line due to the alternating voltage.

6. A program causing a computer connected to a communication device via a power line, a signal line, and a common line to execute:

performing at least one of transmission and reception of a current signal generated by opening and closing of a circuit including the signal line and the common line, except when a phase of an alternating-current voltage applied between a 1 st terminal for connection with the power supply line and a 2 nd terminal for connection with the common line is within a specific range, thereby communicating with the communication apparatus,

the specific range is a range in which an induced current larger than a reference value flows in the signal line due to the alternating voltage.

Technical Field

The invention relates to a communication device, a communication method and a program.

Background

Communication devices that operate by communicating with other devices are becoming widespread. For example, a technique has been proposed in which an indoor unit and an outdoor unit of an air conditioner constituting an air conditioning system communicate with each other to cooperatively operate the indoor unit and the outdoor unit (see, for example, patent document 1).

Patent document 1 describes a system in which an indoor unit and an outdoor unit are connected by a 3-core cable including a power supply line, a communication line, and a common line. In this system, electric power is supplied to the air conditioners via the power supply line and the common line, and the air conditioners communicate with each other via the communication line and the common line.

Disclosure of Invention

In the system described in patent document 1, when a cable connecting an air conditioner is extended, the line-to-line capacitance induces an induced noise in the communication line, and thus there is a possibility that communication cannot be performed normally. That is, when the technique described in patent document 1 is applied to communication between communication apparatuses, there is a possibility that the communication quality is degraded due to induced noise.

The present invention has been made in view of the above circumstances, and an object thereof is to improve communication quality.

In order to achieve the above object, a communication device according to the present invention is connected to another communication device via a power line, a signal line, and a common line, and includes: a detection unit that detects a phase of an alternating-current voltage applied between a 1 st terminal for connection with a power supply line and a 2 nd terminal for connection with a common line; and a communication unit that performs communication with another communication device by performing at least one of transmission and reception of a current signal generated by opening and closing of a circuit including the signal line and the common line, except when the phase detected by the detection unit is within a specific range in which an induced current larger than a reference value flows in the signal line due to the alternating voltage.

According to the present invention, at least one of transmission and reception of the current signal is performed except when the phase of the alternating voltage is within a specific range. Here, the specific range is a range in which an induced current larger than a reference value flows in the signal line due to the ac voltage. Therefore, communication by the communication device is performed except for the period in which the induced noise is generated. This can improve the quality of communication.

Drawings

Fig. 1 is a diagram showing a schematic configuration of a communication system according to embodiment 1.

Fig. 2 is a diagram showing a configuration of a communication device according to embodiment 1.

Fig. 3 is a diagram showing the structure of the detection unit.

Fig. 4 is a diagram 1 showing the configuration of the communication unit.

Fig. 5 is a 2 nd diagram showing the configuration of the communication section.

Fig. 6 is a diagram for explaining a current signal.

Fig. 7 is a diagram for explaining induced noise.

Fig. 8 is a diagram showing a case of communication when the phase is within a specific range.

Fig. 9 is a diagram showing a configuration of a communication device according to embodiment 2.

Fig. 10 is a diagram showing an example of the range table.

Fig. 11 is a flowchart showing the adjustment processing of the specific range.

Fig. 12 is a diagram showing a schematic configuration of a communication system according to a modification.

Fig. 13 is a diagram showing a configuration of a computer as a communication device.

(symbol description)

100: a communication system; 11: an alternating current power supply; 110: a cable; 111: a power line; 112: a common line; 113: a signal line; 200. 300, 400, 500: a communication device; 201. 301: a 1 st terminal; 202. 302: a 2 nd terminal; 203. 303: a 3 rd terminal; 210: a power supply unit; 220. 320, and (3) respectively: a detection unit; 221: a zero-crossing detection module; 222: a frequency decision module; 223: a phase calculation module; 230. 330: a communication unit; 231. 331: a sending processing module; 232. 332: a sending module; 233. 333: a receiving processing module; 234. 334: a receiving module; 241. 273, 277, 341, 373, 377: a resistance; 242. 342: a diode; 250. 350: a storage unit; 251: a range table; 271. 276, 371, 376: a photodiode; 272. 275, 372, 375: a phototransistor; 274. 374: a constant voltage source; 61: a processor; 62: a main storage unit; 63: an auxiliary storage unit; 64: a communication interface section; 65: an internal bus; p1: carrying out a procedure; specific ranges are: r1, R2; the specific period: t1, T2.

Detailed Description

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.