JPS5845756B2 - Synchronized beacon device for beacon groups - Google Patents

Description

Detailed Description of the Invention This invention takes advantage of the fact that the time signal in the program of standard medium wave broadcasting is on the hour of the standard time, and for example, each of a large number of signs placed on the sea After receiving the broadcast, synchronously calibrate the flashing signal generation circuit using the time signal during the program, and make each sign flash or flicker at the same time or at a predetermined time interval via a delay circuit, so that each sign is grouped together. This invention relates to a synchronous marking device for marking lights that is operated.

In general, for example, the development of coastal areas has progressed rapidly, and as a result the number of night lights in coastal waters has increased dramatically, and these lights dazzle the eyes of navigators, significantly reducing the visibility of navigational lights, etc. It is getting to the point where it poses a safety risk.

In response to this current situation, as a means of making navigators recognize navigational beacon lights, etc., multiple or multiple beacon lights are combined, and each beacon light is combined to create a pattern that gives the navigator the recognition of a line or plane within the same visual field. It is necessary to synchronize the flashing or blinking, but it is extremely difficult to connect each sign with a cable.

Alternatively, one of the groups of markers may be provided with a transmitting station to control many other markers, but this is not possible over a wide range of control due to restrictions under the Radio Law.

Taking the above points into consideration, the present invention utilizes time signals included in radio waves transmitted for other purposes, such as radio broadcasts, without interconnecting each sign. , the blinking of the lights of each sign is controlled all at once or at predetermined time intervals.The present invention will now be described in detail.

Each sign has a device consisting of an antenna 1, a receiver 2, a time signal detector 3, a flashing signal generator 4, a flashing circuit 5, and a top 6, as shown in FIG.

The antenna 1 may be of any type, but a light buoy on the sea (in this case, an omnidirectional one is preferable).

The receiver 2 receives radio waves of a predetermined frequency from 525KH2 to 16057G (z), and outputs a detected and rectified low frequency signal.

The time signal detector 3 extracts only the time signal from among the many components contained in the signal from the receiver by converting it into a pulse as a synchronizing signal.

That is, as shown in FIG. 2, there is a frequency separation circuit 7 that uses a filter element to select frequencies in a signal, a time separation circuit 8 that selects time widths and time intervals, and has a configuration as shown in FIG. It consists of a sequential circuit 9 having a configuration as shown in FIG. 4, which outputs a pulse as a synchronizing signal only when the pulses arrive in the same order.

Here, 10 to 13 in Fig. 3 are monomulti, 14 to 17 are gates, 18 is a differential circuit, 19 in Fig. 4 is a ternary counter with a trigger terminal and a reset terminal, 20 is a gate, and 21 is a monomulti. It is.

As shown in FIG. 5, the blinking signal generation circuit 4 divides the frequency of the reference signal from a reference oscillator 23 which has a crystal piece 22 and performs stable oscillation, and divides the frequency of the reference signal from the reference oscillator 23, which is reset by the synchronization signal from the set terminal. A frequency assembly circuit 2 composed of a frequency divider 24 and gates and flip-flops that assemble a plurality of frequency-divided signals from the frequency divider 24 to obtain a required blinking signal.
It consists of 5.

The lighting circuit 5 uses a blinking signal from the blinking signal generating circuit 4 to cause the striking unit 6 to blink, and is composed of a switching circuit using a high-power switching element and a sunlight valve circuit that detects daylight sunlight and turns off the striking unit 6. ing.

The following description assumes that the device configured as described above receives NHK broadcasts.

From the NHK broadcast radio waves captured by the antenna 1, only low frequency signals are extracted by the receiver 2.

This low-frequency signal contains many components other than the time signal (corresponding to the contents of this program), and its frequency and amplitude fluctuate irregularly and violently.

A low frequency signal like the one shown in Figure 6a can be obtained only when it is broadcast during a time signal or program, but it is not necessarily obtained every hour on the hour.
Also, since it is only broadcast from 5 o'clock to 24 o'clock, there is only noise outside of this period.

In Fig. 6, the signal A is an audio signal during the program, and the signal A is a forecast signal constituting a time signal, and after this continues three times at one-second intervals, the real address of Ha appears.

The forecast signal has an amplitude smaller than the peak value of the military report signal and is 440
The Hz sine wave, the instinct signal C, is an 880 Hz sine wave that attenuates over time, and its first rising point is the absolute hour.

The low frequency signal including the time signal applied to the time signal detector 3 is first sent to the frequency separation circuit 7, where only signals having intensities above the specified amplitudes of 440 Hz and 880 Hz are separately extracted as shown in FIGS. 6 and 6C, respectively.

Here, the second signal is a 440Hz component included in part A unrelated to the time signal in Figure A, tl is the duration of the forecast signal, approximately 0.07 seconds, and t2 is the interval between the forecast signals and the forecast signal. The interval between military news signals is one second.

The 440Hz signal including the forecast signal is then sent to a time separation circuit 8.
Only those signals having a duration of less than 0.08 seconds on the ground, for example 0.06 seconds, appear as pulses at the output at the point where the input signal is interrupted, for example as shown in FIG. 6d.

Further, the time separation circuit 8 has a monomulti with a metastable time of t3 as shown in e in the same figure, and a monomulti with a re-trigger function and a metastable time of t4 as shown in f in the same figure.
This and the gate select pulse intervals.

That is, for example, as shown in d to e in d of the same figure, when the next pulse is input at an interval shorter than 0.9 seconds t3 from the first pulse, the interval shorter than 1.1 seconds t4 after the first pulse is inputted. When the next pulse is inputted, waveforms such as c=f' to b in FIG. 9 are obtained.

The sequential circuit g counts the pulses from d in the same figure when there is no input that goes high to its reset terminal, and when three pulses are input, the 880 Hz signal from the frequency separation circuit 7 is input within the time interval t4. When input, a synchronizing signal having a predetermined time width as shown in the figure is output at the rising edge of the input signal.

The synchronization signal created in this manner is accurate (it captures the rising point of the time signal water wheel), and is applied to the reset terminal of the flashing signal generation circuit 4.

Here, the blinking signal generation circuit 4 separates the reference signal from the extremely stable reference oscillator 23 having a crystal 22, and programs the counter assembly circuit 25 (for example, as shown in FIG. A blinking signal corresponding to Al+ is generated, which drives the lighting circuit, causing the striking part to repeatedly blink.

t in i in the same figure is one period of the signal, and t6 is a pause time of blinking.

When the synchronization signal is input, the frequency divider 24 is instantaneously reset and starts dividing the reference signal from that point, and the counter assembly circuit 25 generates the Morse code "A" signal after the pause time has elapsed, and then the next The operation continues with the cycle of t5 until the synchronization signal of is input.

That is, when a synchronization signal is input to the blinking signal generator 4, the synchronization is calibrated in the direction in which the blinking light goes out.

Even at its shortest, the time signal during the Kohede program is only broadcast every hour, and it is not broadcast between 24:00 and 5:00 the next morning, which is the most important time for beacons. Unless the time error after 5 hours is kept within 0.1 seconds, it will not be possible for the observer to see the simultaneous flashing.

For this reason, it goes without saying that the reference oscillator 23 must use a crystal resonator 22 with extremely high stability.

If the contrast assembly circuit 25 of the flashing signal generator 4 is programmed so that each marker light flashes with exactly the same contrast, the lights of each marker light will be individually synchronized and corrected each time the time signal is broadcast.
The lights flash and flicker all at once.

If a delay circuit is provided between the flashing signal generator 4 and the lighting circuit 5 and the delay time is set to be changed sequentially according to the arrangement order of the signs, the flashing and flickering can be activated sequentially with a time lag. Can be done.

At this time, the lights of the marker group move smoothly from one side to the other, further increasing the visibility effect.

Additional related nuclear power plant patent No. 1000311 (Special Publication No. 52-3296
No. 0) is a case where aviation radio beacon radio waves are used as external radio waves for synchronous control.

This invention uses medium wave standard broadcasting waves as external radio waves.

In nuclear power plants, the synchronization signal was detected by detecting only the time width, but in this invention, the synchronization signal was detected by detecting the frequency, electric field residual temperature, and time relationship.

The aeronautical radio beacon radio waves transmitted between nuclear power plants are radio waves with relatively low power and long wavelengths, so the antennas and buoys are also large.

In the present invention, the antenna can be made ultra-small and can be mounted on a small buoy, further contributing to navigational safety.

[Brief explanation of drawings]

Fig. 1 is an electrical block diagram showing one embodiment of the present invention, Fig. 2 is a block diagram of the time signal detector shown in Fig. 1, and Fig. 3 is a block diagram of the time signal detector shown in Fig.
4 is a block diagram of the sequential circuit of FIG. 2, FIG. 5 is a block diagram of the flashing signal generator of FIG. This is an explanatory diagram of the relationship between deformation of each part and the passage of time. 1 is an antenna, 2 is a receiver, 3 is a time signal detector, 4 is a blinking signal generator, 5 is a lighting circuit, 6 is a top, and 24 frequency division vessel.

Claims (1)

[Claims] 1.Each sign is equipped with a medium-wave standard broadcast radio wave receiver, and its output is input to a time signal detector, which detects the time signal during the broadcast program, and transmits the signal to a flashing signal generator with a frequency divider that determines the flashing and blinking of the sign. In addition, the frequency divider is synchronously calibrated, and the output of the calibrated flashing signal generator is used to drive the lighting circuit to flash each sign.
A synchronized beacon device for a group of beacons that is characterized by blinking as a group.