JPH0449722A - Music chime start-up circuit - Google Patents

Abstract

PURPOSE:To prevent the leading part of a music chime dissipated by fixing the delay time of a delay circuit at a value in which the ringing start time of the music chime can be prevented inputted during the delivery of a channel selection signal. CONSTITUTION:The delay circuit 4 is inserted between a start-up signal sending means 1 and a music chime ringing means 3, and the output sides of the means 1 and 3 are connected to a channel selection and completion signal sending means 2 via an OR means 5. In such constitution, a start-up signal from the means 1 is inputted to the means 2 as it is as a pseudo reply signal, and the channel selection signal is sent to radio equipment. Meanwhile, since the signal is applied to the means 3 via the circuit 4, the ringing start time of the music chime is delayed. Also, the delay time of the circuit 4 is set at the value in which the ringing start time of the music chime is prevented inputted while the channel selection signal is being sent. Thereby, it is possible to prevent the leading part of the music chime dissipated.

Description

[Detailed Description of the Invention] [Summary] For example, with respect to a music chime activation circuit used in the master station of a municipal disaster prevention administrative radio system, the purpose of this invention is to prevent the music chime from cutting off at the beginning of the music chime at a set time. A start signal sending means for sending out a start signal, and when the first signal is input, sends a response signal and starts sounding a music chime after a predetermined time has elapsed from the sending of the response signal.

music chime sounding means that stops sending out the response signal when the sounding of the music chime ends; and when a second signal is input, a designated tuning signal using the rising point of the second signal. In the music timing sending circuit, the starting signal is delayed and the starting signal is sent out as the first signal. a delay circuit for sending a signal to the chime sounding means; and a logical sum means for sending a logical sum signal obtained by calculating the logical sum of the activation signal and the response signal to the channel selection/termination signal sending means as the second signal. The delay time of the delay circuit is fixed to a value such that the time point at which the music chime starts sounding does not fall during the transmission of the channel selection signal.

[Industrial application field]

The present invention relates to a music chime activation circuit used, for example, in a master station of a two-municipality disaster prevention administrative radio system.

Usually, municipalities are equipped with disaster prevention administrative radio systems, which are sometimes used to inform local residents of the time using different music chimes three times a day, for example, during the day, at noon, and in the evening.

At this time, it is desired to prevent the music chime from cutting off at the beginning even if there are many tuning areas or even if the music chime is relayed multiple times from the parent station to slave stations installed in the tuning area.

[Conventional technology]

FIG. 4 is a block diagram of the conventional example, FIG. 5 is an explanatory diagram of the operation of FIG. 4, and FIG. 6 is an explanatory diagram of problems.

Here, the symbols on the left side of FIG. 5(a) and FIG. 6 indicate the waveforms of the portions with the same symbols in FIG. 4, and FIG. Below, Figure 5 f
The operation of FIG. 4 will be explained with reference to a).

First, the set time from the set time storage circuit 12 and the current time from the clock 13 are input to the time coincidence detection circuit 1) in the automatic sending device. Therefore, the time-coincidence detection circuit 1)
detects that the current time matches the set time,
An activation signal as shown in FIG. 5 (al-■, ■) is sent to the activation input receiving circuit 31 in the music chime device.

When the activation input receiving circuit 31 receives the activation signal, it sends the activation command shown in FIG. The activation response output circuit 34 sends a response signal of level 1) as shown in FIG. 5 +8)-0 to the cell call activation circuit 21 and the cell call termination circuit 22.

Therefore, the selector activation circuit 21 is activated, and two, for example, three waves of selection signals are sequentially set from there.

Since the signal is sent to the slave station via the radio, only the selected slave station turns on its own speaker (Fig. 5 (1) 1-■
reference).

Here, it is assumed that the cell call activation circuit 21 is activated at the rising edge of the response signal, and the cell call termination circuit is activated at the falling edge of the response signal.

Further, the delay circuit 32 delays the activation command by a set time T within 0 to 5 seconds, for example, and applies it to the music blasting circuit 33. The music sounding circuit is shown in Figure 5 (a
Only during the H level indicated by l-■, the specified music chime is driven through a separate route and the speaker of the selected slave station via a radio (not shown).

In addition, when the meesic chime transmission is completed, the meesic chime output circuit 33 sends out a termination signal as shown in FIG. 5(δ)-■. The response signal returns from H level to L level.

Therefore, the cell call termination circuit is activated by the falling point of the response signal and sends the cell call termination signal to the selected slave stations via the radio, so that the speakers of these slave stations are turned from on to off (the fifth (See Figure (a)-■).

Next, the types of signals sent from the transmitter of the master station are shown in Figure 5 (b).
As shown in FIG. 1, the carrier is transmitted in the area a, the selection signals Fc, FX, and Fa in the area, and the music chime in the area C are sequentially transmitted to the slave station.

Here, the carrier is used to wait for the slave station receiver to enter the operating state, and lasts about 1 second, but when there is a relay station, the carrier waits for the slave station receiver to enter the operating state.
1 second is added for each station. Further, each selection signal lasts about 1 second, and the gap between two selection signals is about 0.25 seconds, so when there are three selection signals, the area is about 3.5 seconds.

Note that when selecting other than all stations, the corresponding slave stations must be selected one after another.

[Problem to be solved by the invention]

Here, when selecting other than all stations, it is necessary to generate selection signals equal to the number of slave stations. Therefore, for example, if two stations are selected, the area will be 7 seconds. In addition, if a slave station receives data via multiple relay stations, the carrier length must be increased accordingly (Figure 6 - ■, ■°
reference).

On the other hand, the music chime starts from the time when the activation signal delayed by the delay circuit is input to the music sounding circuit.
For example, if the delay circuit takes about 5 seconds to send out the selection signal, the music chime will start playing before the slave station's speaker is turned on. There is a problem in that the beginning of the music chime is cut off (see Figure 6--).

An object of the present invention is to eliminate cut-offs at the beginning of musical chimes.

[Means to solve problems]

FIG. 1 shows a block diagram of the principle of the present invention.

In the figure, ■ is a start signal sending means that sends out a start signal at a set time, and 3 is a start signal sending means that sends out a response signal when the first signal is input, and also starts music after a predetermined time has elapsed since the sending of the response signal. 2 is a musical chime sounding means that starts sounding a chime and stops sending out the response signal when the sounding of the musical chime ends;
When the second signal is input, the channel selection/end signal sending means uses the rising point of the second signal to sequentially send out the specified tuning signal, and uses the falling point to send out the end signal. It is.

Further, 4 is a delay circuit that delays the activation signal and sends it as the first signal to the music chime sounding means, and 5 is a delay circuit that delays the activation signal and sends it as the first signal to the music chime sounding means. This is a one-stage logical sum which is sent as a second signal to the channel selection/end signal sending means.

Then, the delay time of the delay circuit is fixed to a value such that the start time of the music-sounding does not fall during the transmission of the channel selection signal.

With this, it is possible to eliminate truncated musical chimes.

[Function] The present invention includes a delay circuit between the activation signal sending means 1 and the music chime sounding means, and a tuning/termination signal sending means by connecting the output sides of the activation signal sending means and the music chime sounding means via an OR means. I connected it to the input side of.

As a result, the activation signal from the activation signal sending means is directly inputted as a pseudo response signal to the tuning/end signal sending means, and the tuning signal is sent to the wireless device.

On the other hand, since the music chime is applied via a delay circuit to the music chime sounding means, the time at which the music chime starts sounding is delayed compared to the conventional example. Incidentally, the delay time of the delay circuit is set to a value such that the start time of the medium sound chime does not fall during the transmission of the channel selection signal.

With this, it is possible to avoid cutting off the beginning of the music chime.

〔Example〕

FIG. 2 is a block diagram of an embodiment of the present invention, and FIG. 3 is an explanatory diagram of the operation of FIG. 2.

Note 5. The symbols on the left side of FIG. 3 indicate the waveforms of the portions with the same symbols in FIG. Also, the same reference numerals indicate the same objects throughout the figures.

Here, time coincidence detection circuit 1). The set time storage circuit and the clock 13 are a component of the activation signal sending means 1, the cell call activation circuit 214, the cell call termination circuit 22 are a component of the channel selection/termination signal sending means 2, and the activation input receiving circuit 31. Delay circuit 32. The music chime sounding circuit 33 and the activation response output circuit 34 are not shown as components of the musical chime sounding 1' stage 3. Further, OR game) 51 indicates a component of one stage of logical sum 5.

The operation shown in FIG. 2 will be explained below with reference to FIG. A detailed explanation will be given of the conventional example, a brief explanation will be given of the seventh part, and a detailed explanation will be given of the part of the present invention.

First, when the time-number configuration circuit 1) in the automatic sending device detects that the current time matches the set time, the time-number configuration circuit 1) in FIG.
■The activation signal as shown in 01? The signal is sent to the gate 51 and the delay circuit 4.

As shown in FIG. Then, the Selecall activation circuit 21 was activated and settings were made from there.

For example, three waves of selection signals are sequentially transmitted to a slave station via one radio device (not shown). As a result, only the selected slave station turns on its own speaker (see Figure 3--).

It is assumed that the cell call activation circuit 21 is activated at the rising edge of the OR gate output signal, and the cell call termination circuit is activated at the falling edge of the OR gate output signal.

On the other hand, the activation signal applied to the delay circuit 4 is as shown in FIG.
After being delayed by a time T as shown in FIG. The start input receiving circuit transmits the start command to the start response output circuit 34 and the delay circuit 3 as shown in Figure 3-○.
Send to 2.

The activation response output circuit 34 sends a response signal as shown in Figure 3-○ to the OR gate 51, so the OR gate/output signal is generated when the activation signal turns OFF as shown in Figure 3-■. However, it continues to be at H level due to the response signal.

The delay circuit 32 delays the input activation command by a time T as shown in FIG. The music blowing circuit sends out a music chime to a radio (not shown) during the H level period shown in FIG.

Here, the sum of the delay times of the delay circuits 4 and 32 is T1+T
2"C, but this value is set so that the beginning of the music chime is after the selection signal sending needle r as shown in Figure 3 - ○ and ■, so the slave station's speaker is turned on. The music chime will be input after this.

Incidentally, when there are many slave stations or relay stations to be selected, by setting the value of T2 to be in the state of 1-, the beginning of the music chime will not be cut off. Furthermore, if the delay time of the delay circuit 4 can be set, it is possible to set the delay time to the optimum time depending on the system.

Now, when the transmission of the music chime is completed, a blowing end signal shown in FIG. The activation response circuit turns off the response signal it is sending, so the OR gate output signal turns off, but the cell call termination circuit 22, which detects this off, sends a termination signal as shown in Figure 3-■ to the radio. to the slave station selected in step 1.

With this. The slave station's speaker turns off and returns to standby mode.

That is, the activation signal from the time/number output circuit is directly sent to the cell call activation circuit, and from there the selection signal is sent to the radio. On the other hand, for the music blasting circuit,
A start signal is applied via a two-stage delay circuit.

At this time, the delay time is set to a value such that the time when the music chime starts sounding does not fall within the transmission of the channel selection signal, so that the beginning of the music chime is not cut off.

〔Effect of the invention〕

As described in detail below, according to the present invention, there is an effect that it is possible to eliminate cut-offs at the beginning of musical chimes.

[Brief explanation of drawings]

Fig. 1 is a block diagram of the principle of the present invention, Fig. 2 is a block diagram of an embodiment of the invention, Fig. 3 is an explanatory diagram of the operation of Fig. 2, Fig. 4 is a block diagram of a conventional example, and Fig. 5 is a block diagram of an embodiment of the present invention. FIG. 4 is an explanatory diagram of the operation, and FIG. 6 is an explanatory diagram of the problem. In the figure, 1 is a start signal sending means, 2 is a channel selection/end signal sending means, 3 is a music chime sounding means, 4 is a delay circuit, and 5 is an OR means. Principle of the invention Opening and soft enclosure No. 1 Concave Diagram 2 Operation explanation Opening No. 3 W Kasumiyo

Claims (1)

[Claims] 1. Starting signal sending means (1) that sends out a starting signal at a set time, and when the first signal is input, sending out a response signal, and a predetermined period from the sending of the response signal. a music chime sounding means (3) that starts sounding a music chime after a lapse of time and stops sending out the response signal when the sounding of the music chime ends; Tuning/termination signal sending means for sequentially transmitting specified tuning signals using the rising points of the signals and transmitting end signals using the falling points (
2) a delay circuit (4) that delays the activation signal and sends it as the first signal to the music chime sounding means (3);
and the tuning/termination signal sending means (
2) and an OR means (5) for transmitting the music chime, and the delay time of the delay circuit is fixed to a value such that the time when the music chime starts sounding does not fall during the transmission of the tuning signal. circuit. 2. The music chime starting circuit according to claim 1, wherein the delay time of the delay circuit can be set.