JPS62151037A - Reception equipment for power line carrier - Google Patents

Abstract

PURPOSE:To improve the reliability of communication by measuring the consecutive quantity of a reception signal by a consecutive quantity measuring means, comparing the consecutive quantity and a setting value by a discrimination means, discriminating noise and data and resetting the consecutive quantity measuring means to the initial state so as not to integrate the consecutive quantity even when the noise with less consecutive quantity is consecutive for plural quantity. CONSTITUTION:When a signal superimposed on a power line 14 caught by a reception means 10 is within the communication timing of a timing set means 13, the consecutive quantity of the signal is measured by a consecutive quantity measuring means 11 and the discrimination means 12 discriminates it as noise when the consecutive quantity of the signal is less than the setting value and as data when the set value or over. When the result of discrimination is noise, the discrimination means 12 resets the consecutive quantity measuring means 2 to the initial state. When the result of discrimination is data, one bit of data is established. Thus, no noise is integrated and only the data are confirmed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a power line carrier receiving device applied to power line carrier communications.

2. Description of the Related Art In conventional power line carrier communication, a signal is superimposed on the communication timing on a power line carrier, as shown in FIG. and,
As shown in FIG. 6, the received signal continuation amount within the communication timing is integrated and becomes η+chi+chi, which is the sum of the noise continuation amount T1, the noise continuation amount T2, and the data continuation amount T3.

FIG. 7 is a block diagram of a conventional device, in which 1 is a receiving means connected to the power line 5, 2 is a continuous amount measuring means for measuring the continuous amount of received signals, and 3 is within the communication timing output from the continuous amount measuring means 2. Determination means compares the received signal continuation amount with a set value, and determines that if it is less than the set value, it is noise, and if it is greater than the set value, it is data. 4 is a timing setting means that sets the communication timing.

Problems to be Solved by the Invention In the conventional devices as described above, even if there is a small amount of continuous noise, such as impulse noise, if multiple noises occur within the communication timing, they will be accumulated and mistakenly considered as data. This has the disadvantage of causing communication errors.

The present invention solves the above problem, and aims to prevent communication errors by completely distinguishing between received signals and noise.

Means for Solving the Problems The power line carrier receiving device of the present invention includes a receiving device for capturing signals on the power line, a continuous amount measuring device for measuring the continuous amount of the received signal, and a continuous amount measuring device for measuring the continuous amount of the received signal to a set value. In comparison, the discrimination means includes discrimination means for discriminating the received signal into noise and data, and timing setting means for communication timing that distinguishes bits of data on the power line carrier, and the discrimination means determines whether the discrimination result of the received signal is noise or data. If so, the continuous amount measuring means is reset to the initial state.

Operation In the above configuration, the continuous amount measuring means measures the continuous amount of the received signal, the discriminating means compares the continuous amount with the set value, distinguishes between noise and data, and resets the continuous amount measuring means to the initial state. Therefore, even when a plurality of noises with small durations occur in succession, the durations are not integrated, and the reliability of communication can be improved.

EXAMPLES Hereinafter, examples of the present invention will be described with reference to the drawings.

FIG. 1 shows a block diagram of a power line carrier receiving apparatus according to the present invention. Reference numeral 10 indicates receiving means for capturing the signal superimposed on the power line 14; 11 indicates a continuous amount measuring means for measuring the continuous amount of the received signal by the receiving means 10; and 12 indicates the continuous amount of the received signal by comparing it with a set value and detecting the received signal. 13 is a communication timing setting means for distinguishing bits of data on the power line 14.

If the signal captured by the receiving means 1o is within the communication timing of the timing setting means 13, the continuation amount of the signal is measured by the continuation amount measuring means 11, and the determining means 12
If the amount of signal continuation is less than a set value, it is determined to be noise, and if it is greater than or equal to the set value, it is determined to be data. If the determined result is noise, the determining means 12 resets the continuous amount measuring means 2 to the initial state. Furthermore, if the determined result is data, one bit of data is established. Therefore, noise is not integrated and only the data can be checked.

FIG. 2 shows a received signal waveform diagram of the power line carrier receiving device of the present invention, in which the received signal within the communication timing is T1.
T2. However, since the continuous amount of the signal for T1 and T2 is smaller than the set value, it is determined to be noise and the continuous amount measuring means 2 is reset, so the data is T3.
It is possible to distinguish the data.

FIG. 3 shows a block diagram of a second embodiment of the power line carrier receiving device of the present invention, in which the continuous amount measuring means 11 is composed of a timer 15, and the communication timing setting means 13 sets the continuous amount measuring means 11. Timer 1 if within the communication timing
5 is M! with a receiving means of 1°! In January, 111-morning 1z11 Yoro-kun 12 compares the measured time and the set time. The subsequent processing is the same as that shown in FIG. In this case, the continuous amount measuring means 12 can be realized with a simple configuration of a timer.

FIG. 4 shows a block diagram of a third embodiment of the power line carrier receiving device of the present invention, in which the continuous amount measuring means 11 is composed of a pulse counter 16, and the communication timing setting means 13 sets the continuous amount measuring means 11. If it is within the communication timing, the pulse counter 16 measures the number of continuous pulses of the signal captured by the receiving means 1o, and the determining means 12 compares the measurement time with the set number of continuous pulses. The subsequent processing is the same as that shown in FIG. In the case of this embodiment, the continuous amount measuring means 11 can be easily constructed by using a pulse counter 16 which does not require temperature and reference time.

Effects of the Invention As described above, according to the present invention, a received signal is completely differentiated into noise and data, and even if a plurality of noises with a small amount of continuity occur consecutively within the communication timing, they will not be mistaken as data, thereby preventing communication errors. Therefore, it is possible to realize a power line carrier receiving device with improved communication reliability that can prevent such problems.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a receiving device for power line carrier according to the first embodiment of the present invention, FIG. 2 is a waveform diagram of a received signal of the receiving device for power line carrier according to the present invention, and FIG. Block diagram of a receiving device for power line carrier according to an embodiment of
The figure is a block diagram of a power line carrier receiver according to the third embodiment of the present invention, and FIGS. 5, 6, and 7 are power line carrier waveform diagrams and received signal waveform diagrams in conventional power line carrier receivers. , is a block diagram. 10... Receiving means, 11... Continuation amount measuring means, 12... Discriminating means, 13...
Timing setting means, 14...Power line. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7

Claims (2)

[Claims] (1) A receiving means for capturing a signal on a power line, a continuation amount measuring means for measuring the continuation amount of the received signal, and a continuation amount measuring means for measuring the continuation amount of the received signal, comparing the continuation amount of the received signal with a set value, and dividing the received signal into noise and data. The discriminating means includes a discriminating means for discriminating, and a communication timing timing setting means for discriminating bits of data on a power line carrier, and the discriminating means sets the continuous amount measuring means to an initial state if the discriminating result of the received signal is noise. Power line carrier receiving device to be reset. (2) The power line carrier receiving device according to claim 1, wherein the continuous amount measuring means is constituted by a timer that operates only while the received signal continues. (2) The receiving device for power line transport according to claim 1, wherein the continuous amount measuring means is constituted by a pulse counter that counts received signal pulses.