JPH077766A - Transmitter - Google Patents

Abstract

PURPOSE:To obtain a transmitter capable of discriminating surely a transmission error when transmission data are changed due to noise in a transmitter in which a main body equipment and a remote controller are connected by a transmission line. CONSTITUTION:A water heater main body 1 and its remote controllers 2, 3 are interconnected by a transmission line 4, and the transmission line 4 is a 2-core wire transmission line, through which signal data and power are transmitted. In the case of data transmission, same signal data are sent several times and at least two different intervals ta, tb are adopted for the transmission intervals of the respective data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission device for transmitting data between, for example, a main body of a water heater or the like and a remote controller for remote control thereof.

[0002]

2. Description of the Related Art Conventionally, a water heater main body and its remote controller are connected by a transmission line to convey electric power from one of the water heater main body and the remote controller to the other through the transmission line, and to mutually connect via the transmission line. It is known that signals are transmitted between them.

In such a transmission device,
The data transfer interval was constant when signals were transmitted through the transmission path. For example, as shown in FIG. 4, in the data transfer, the same data is transmitted a plurality of times with the power carrier time period (t0) as a constant interval period. When all the data match, the data is accepted and the hot water supply operation is performed according to the content.

[0004]

However, in the conventional transmission device, since the data transmission interval is constant, if noise synchronized with the data transmission interval is superimposed on the transmission line, all the data transmitted a plurality of times will be lost. Since it changes in the same way, there was a problem that the main device and the remote controller malfunctioned by receiving the data.

Therefore, it is an object of the present invention to provide a transmission device which does not malfunction even with noise having a fixed period by shifting the data transmission interval.

[0006]

In order to achieve the above object, the invention according to claim 1 connects a main body device and a remote controller for remotely operating the main body device by a transmission line, and this transmission line is connected. The transmission device for transmitting a signal according to the above is provided with a transmission means for transmitting a signal at a signal transmission interval between the main device and the remote controller at least at two or more different intervals.

According to a second aspect of the present invention, the water heater main body and a remote controller for remotely operating the water heater main body are connected by a two-core transmission line, and the two-core transmission line is used for signal transmission and power transfer. In the transmission device for performing the above, when transmitting a signal between the water heater body and the remote controller, the same signal to be transmitted is transmitted at least three times or more,
It is characterized by further comprising: transmission means for transmitting signals with each transmission interval of the same signal being different from each other by at least two or more, and determination means for receiving data on condition that all of the transmitted data are matched. And

[0008]

The main body of the water heater and its remote controller are connected by a transmission line, and the transmission line is a two-core transmission line so that it can carry signal data and electric power.

In the data transmission, the same signal data is sent several times, and the transmission interval of each data is at least two or more different intervals.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing an example to which the present invention is applied. As shown in FIG. 1, the water heater 1 is connected to a main remote controller 2 and a flow remote controller 3, which are remote controllers, through a two-core transmission path 4. And water heater 1
Is connected to a power outlet, and electric power is transferred from the water heater 1 to the main remote controller 2 and the flow remote controller 3 through the transmission path 4.

When the main remote controller 2 or the flow remote controller 3 is operated, the contents thereof are transmitted to the water heater 1 through the transmission path 4, and the water heater 1 operates according to the contents.

Main remote control 2 or flow remote control 3
FIG. 2 shows how data is transmitted when is operated. As shown in FIG. 2, the data is transmitted several times (in FIG.
The data is transmitted to the water heater 1, and each data is the same data. Then, the transmission interval of the data is
The second time is ta, the second time and the third time are tb, the third time and the fourth time are ta, and the transmission means transmits at different intervals.

On the other hand, on the side of the water heater 1, when the data transmission is received, the discriminating means discriminates whether or not the data of all four times are in agreement, and if they are in agreement, it is considered that the data was transmitted correctly and the data is accepted If there is data that does not match, it will not be accepted because there is data that has changed due to noise or the like.

Therefore, even when noise having an interval period of ta or tb is superimposed, the data will always be inconsistent, so that it can be determined that there is a transmission error.

In the above embodiment, the data transmission interval has two cycles of ta and tb, but it may be a plurality of cycles, for example, the first data and the second data as shown in FIG. The data transmission interval may be tc, the second and third transmission intervals may be td, and the third and fourth transmission intervals may be te.

In the above embodiment, the same data is transmitted 4 times, but it can be realized by transmitting 3 times or more.

Further, in the above embodiment, the transmission intervals ta and t
It is desirable that it is not a multiple of b.

[0019]

As described above, according to the present invention, the data transmission between the main device and the remote controller connected by the transmission path is performed at the transmission interval in which a plurality of different intervals are combined. Therefore, there is an effect that it is possible to surely determine that the transmission is erroneous even when noise of a certain period is added.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an application example of the present invention.

FIG. 2 is an explanatory diagram of the present invention.

FIG. 3 is an explanatory diagram of another embodiment.

FIG. 4 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 1 Water heater 2 Main remote control 3 Flow remote control 4 Transmission path

Claims (2)

[Claims] 1. A transmission device for connecting a main body device and a remote controller for remotely controlling the main body device by a transmission line and transmitting a signal through this transmission line, wherein a signal between the main body device and the remote controller is transmitted. A transmission device comprising: a transmission unit that transmits a signal with at least two or more different transmission intervals. 2. A transmission device in which a water heater main body and a remote controller for remotely operating the water heater main body are connected by a two-core transmission line, and the two-core transmission line performs signal transmission and power transfer. At the time of signal transmission between the water heater main body and the remote controller, the same signal to be transmitted is transmitted at least three times or more, and each of the same signals is transmitted at least two or more different intervals. A transmission device comprising: a transmission unit; and a determination unit that receives data on condition that all the transmitted data match.