JPH0530228Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a warning device that indicates the direction of an emergency exit in an emergency situation.

(Prior art) As shown in Utility Model Application No. 53-79572,
A warning device that displays an arrow-shaped segment indicating an evacuation route only in an emergency has been proposed.According to this, such a warning device does not have to be installed independently, but can be used in conjunction with another device such as a clock. No special installation space is required.

(Problems to be Solved by the Invention) However, in order to operate such a warning device, in addition to a power supply line, a signal line for supplying an emergency signal to notify that an emergency situation has arrived is required. There is no problem with the power line because it is used to drive other equipment such as a clock used during normal times, but the signal line is used only for this warning device and is therefore very inefficient. Furthermore, multiple such evacuation guidance indicators must be installed in a building, and if the power line and signal line were connected to each indicator, the number of wiring would be too large, resulting in high costs and costs.
The layout was a major problem.

As a method that does not require signal lines, it is of course conceivable to provide a sensor in each indicator, but this would increase the cost per indicator and would not allow the indicators to communicate with each other.

(Means for solving the problems) In order to solve the above-mentioned conventional drawbacks, the present invention
an external sound detection circuit, a low-pass filter that removes a predetermined audible high-frequency component from the detected external sound and outputs it as serial data, a shift register that sequentially converts the serial data obtained from the low-pass filter into parallel data; A detection circuit that outputs a direction signal corresponding to the parallel data of the shift register, a decoder that creates a display signal corresponding to the direction signal, and a segment display section that displays the direction based on the display signal from the decoder are provided. The system is characterized by the ability to provide directions for evacuation routes in emergency situations by sound without using signal lines. In addition, the timing of sequentially storing data in the shift register is synchronized with the carry signal that is generated at regular intervals by counting the reference signal from the reference signal source, and the count timing of this counter is output from the low-pass filter. The device is configured to be synchronized with the generation of a sound signal.

(Example) This will be explained below based on the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention. In the figure, a sound detector 2 detects external sound, and a low-pass filter 4 removes high frequency components from the detected external sound. The output signal from this low-pass filter 4 is transmitted to the shift register 6.
input into data input D. A carry signal from a synchronous counter 10 that counts the reference signal from the reference signal generation circuit 8 is input to the clock input of the shift register 6, and the output from the low-pass filter 4 is synchronized with the generation of this carry signal. Store and shift signals sequentially. Further, the reset input R from the synchronous counter 10 is configured to be reset in response to the generation of the output signal from the low-pass filter 4, thereby causing the generation of external sound and the carry signal from the synchronous counter 10 to be reset. The occurrence is synchronized.

On the other hand, the signal of the output Q of the shift register 6 is input to the detection circuit 12. This detection circuit 12 is a circuit that outputs a direction signal corresponding to the contents stored in the shift register 6. This detection signal is then converted into a display signal by the decoder 14 and supplied to the segment display section 16. As a result, a segment indicating the direction of the evacuation route is displayed on the segment display section 16 by emitting light.

FIG. 2 is a front external view of a warning device according to an embodiment of the present invention, which is integrated with a watch body 20 in this embodiment. Segments d ₁ to _{d 9} of the segment display section 16 are arranged at the bottom of the watch body 20. For example, if the evacuation direction is toward the user, the segments d ₅ , d ₃ , d ₉ and d ₂ are arranged at the bottom of the watch body 20 . lights up, and if the opposite side is facing the user, segments d ₁ , d ₂ , d ₉ and d ₃ light up. And if it is further to the right side of the user, segment d ₄ ,
d ₇ , d ₉ and d ₆ are emitted, and if it is to the left, segments d ₈ , d ₆ , d ₉ and d ₇ are emitted.

3-6 show detailed circuit diagrams of each block shown in FIG. 1.

FIG. 3 shows a detailed circuit diagram of the sound detector 2, shift register 6, reference signal generation circuit 8 and synchronous counter 10.

The sound detector 2 includes a microphone 22 and an amplifier 24 that amplifies the sound signal detected by the microphone 22.
The shift register 6 is composed of six stages of flip-flops (hereinafter abbreviated as FF), and the final stage output _Q5 is connected to the reset input R of all FFs. The other outputs Q ₀ to _{Q 4} are connected to the detection circuit 12 .
Further, the signal A from the low-pass filter 4 is input to the data input D of the shift register 6.
And the clock input φ of the shift register 6 has
An output signal B from the synchronous counter 10 is input.

The synchronization counter 10 is a preset counter 26
and a one-shot multivibrator 28 connected to its preset input PR. The one-shot multivibrator 28 is configured to generate a positive single pulse when the signal A from the low-pass filter 4 changes from "L" to "H", and this pulse is input to the preset input PR of the preset counter 26. When the number is entered, a predetermined count value is preset. Further, the carry signal B of the preset counter 26 is
It is supplied to its reset input R and to the clock input φ of the shift register 6. On the other hand, the reference signal G from the reference signal generation circuit 8 is input to the clock input φ of the preset counter 26. This reference signal generating circuit 8 has an oscillator 30 and a frequency dividing circuit 32 that divides the frequency of its oscillation output signal.

FIG. 4 shows a detailed circuit diagram of the detection circuit 12.

As shown in the figure, the outputs _Q0 to _Q4 of the shift register 6 are input to the detection circuit 12, and four types of direction signals C, D, E, and F are outputted in accordance with the state of the inputs. It is composed of Direction signal C
The AND gate 36 which has the output signal _Q4 is inputted to one end of the AND gate 36, and the inverted outputs _Q0 to _Q3 are inputted to the other end of the AND gate group 38.
The output signal is being input. In addition, the AND gate 40 which uses the direction signal D as an output signal has an output at one end.
Q ₄ is input and the other end is output Q ₃ and inverted output Q ₀
The output signals of the ANDQATE group 42 into which the signals of ~ _Q2 are inputted one by one are inputted. The AND gate 44 which takes the direction signal E as an output signal has an AND gate in which the output Q ₄ is input to one end and the signals of the outputs Q ₃ , Q ₂ and the inverted outputs Q ₁ , Q ₀ are input to the other end. The output signal of the gate group 44 is input. Furthermore, an AND gate 4 which uses the direction signal F as an output signal
8, the output Q ₄ is input to one end and the output Q ₁ ~ to the other end.
The output signal of the AND gate group 50, in which one signal of Q ₃ and one signal of the inverted output Q ₀ is input, is input.

FIG. 5 shows a detailed circuit diagram of the decoder 14.

As shown in the figure, the direction signals C to F are respectively
It has FFs 52 to 58 that are input to the D input. FF5
The output signal of the AND gate 60 to which the output Q ₄ and the output signal G from the frequency dividing circuit 32 are input is input to all of the clock inputs 2 to 58. this
The output Q of the FF 52 is output as a display signal H, the signal of the output Q of the FF 54 is output as a display signal J, and the signal of the output Q of the FF 56 is output as a display signal K. The output signal of the OR gate 62 to which the display signals H and K are input is the display signal I, and the output signal of the OR gate 64 to which the display signals J and M are input is the display signal L.
Further, the output signal of the OR gate 66 to which the display signals H, J, K, and M are input is output as the display signal N.

FIG. 6 shows a detailed circuit diagram of the segment display section 16. Display signal H~N from decoder 14
are input to the base terminals of driving transistors (hereinafter abbreviated as Tr) 68 to 80, respectively. Of these, Tr68 to which the display signal H is input has a segment.
The LEDs that make up d ₁ are connected. Furthermore, segments d ₂ and d ₃ are connected to Tr 70 to which the display signal I is input, and Tr 72 to which the display signal J is input is connected.
is connected to segment _d4 . The segments d ₆ and d ₇ are connected to the Tr 76 to which the display signal L is input.
However, the segment d ₈ is connected to the Tr 78 to which the display signal M is input, and the segment d ₉ is connected to the Tr 80 to which the display signal N is input.

The configuration of the present invention consists of the above components, and will be explained below using time charts shown in FIGS. 7 and 8.

FIG. 7 is a time chart showing the operations of the sound detector 2, shift register 6, synchronous counter 10, and detection circuit 12.

First, when the sound detector 2 detects an external sound containing a specific audible frequency, the output signal A of the low-pass filter 4 becomes a signal that becomes "H" only while the sound is occurring. Here, the synchronous counter 10 is preset to a predetermined count value by the signal A that becomes "H", but in this embodiment, the count value is set to half of the counter value that generates the carry signal. There is. The count time until this half of the counter value of the synchronization counter 10 is counted is set to be shorter than the minimum generation time of external sound for issuing a warning. Therefore, when an external sound is generated that causes a warning, the signal A that becomes "H" from the low-pass filter 4 is always synchronized with the clock input φ while being supplied to the data input D of the shift register 6. The carry signal B of the counter 10 is now input. In this way, the timing at which the external sound is generated and the timing at which the carry signal of the synchronization counter 10 is generated are synchronized.

In this way, the "H" signal A supplied to the D input of the shift register 6 changes from its output _Q0 to _Q1 , _Q2 ... _Q4 ,
d ₅ , and is reset when the output Q ₅ becomes "H", but depending on the length of time the external sound occurs, other than when the output Q ₄ becomes "H" The output states of the outputs Q ₀ to _{Q 3} are different. The AND gate group in the detection circuit 12 detects this and the seventh
As shown in the figure, four types of signals are generated depending on the length of the external sound in response to the output _Q4 becoming "H". In other words, for the shortest tone, a pulse signal of "H" is generated from signal C, for the next shortest tone, a pulse signal is generated from signal D, then from signal E, and for the longest tone, a pulse signal is generated from signal F. Output.

8a to 8d are time charts showing the operations of the decoder 14 and the segment display section 16. FIG. FIG. 8a is a time chart when the signal C becomes "H". At this time, FF52's D
An "H" level signal is input to the input. At the same time, the signal G from the reference signal generating circuit 8 is input to the clock input φ via the AND gate 60, so that the Q output of the FF 52 becomes "H". As a result, the signals H, I, and N become "H", and the transistors 68, 70, and 80 to which these signals are input are turned on. As a result, the segments d ₁ , d ₂ , d ₃ , and d ₉ are illuminated to indicate to the user that they should evacuate in the opposite direction to which they are currently facing.

FIG. 8b shows a time chart when the signal D becomes "H". At this time, the Q output of the FF 54 becomes "H", and the signals J, K, and N become "H". This turns on Tr72, 76, and 80,
Segments _d4 , _d6 , _d7 , and _d9 are illuminated to indicate to the user that they should evacuate to the right.

FIG. 8c shows a time chart when the signal E becomes "H". At this time, the Q output of the FF 56 becomes "H", and the signals I, K, and N become "H". As a result, Tr70, 74, and 80 are turned on,
Segments d ₂ , d ₃ , d ₅ , and d ₉ light up to indicate to the user that they should evacuate in the direction they are currently facing.

FIG. 8d shows a time chart when the signal F becomes "H". At this time, the Q output of the FF 58 becomes "H", and the signals L, M, and N become "H".
As a result, Tr76, 78, and 80 are turned on, and segments _d6 , _d7 , _d8 , and _d9 emit light, indicating to the user that they should evacuate to the left.

In this way, when a predetermined external sound is detected, an evacuation direction is indicated and displayed in response to the signal. When a plurality of such warning devices are installed in a building, each of them is installed in a different direction, and a single external sound may cause the direction indication to be chaotically scattered. In such a case, when connecting the output lines generating the signals C to F from the detection circuit 12 to the decoder 14, the connection order may be changed depending on the installation direction. (For example, if you want to instruct the same evacuation direction even though the installation direction is opposite, send signal C to FF56, signal D to FF58, and signal E to
(Connect signal F to FF52 and signal F to FF54) Then, with one external sound, all alarms will point to the correct evacuation direction.

Also, if you want to turn off this evacuation direction instruction,
For a longer period of time than the external sound to alert you.
In other words, it is sufficient to emit the sound for a period of time until all of the outputs _Q0 to _Q4 of the shift register 6 become "H". In this case, since the clock signal G is generated at the AND gate 60 while all the signals C to F remain at "L",
All Q outputs of FF52 to 58 become "L",
All segments are turned off. In addition, regarding the relationship between the detection circuit 12 and the decoder 14, the FF5 shown in FIG.
The detection circuit 12 may include the circuits 2 to 58.

(Effects of the Invention) As described above, according to the present invention, a warning can be displayed as long as a sound of a specific length including a specific frequency component is generated. This eliminates the need to install a signal line that is completely separate from the power line indoors, as was the case in the past, making installation extremely easy and inexpensive.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a warning device according to an embodiment of the present invention. FIG. 2 is a front external view of a warning device according to an embodiment of the present invention. FIG. 3 is a detailed circuit diagram of the sound detector, shift register, reference signal generation circuit, and synchronous counter in FIG. 1. Figure 4 shows
2 is a detailed circuit diagram of the detection circuit in FIG. 1; FIG. FIG. 5 is a detailed circuit diagram of the decoder in FIG. 1. FIG. 6 is a detailed circuit diagram of the segment display section in FIG. 1. 7 and 8 are time charts showing the operations shown in FIGS. 3 to 6. 2...Sound detector, 4...Low pass filter, 6
...Shift register, 8...Reference signal generation circuit,
10...Synchronization counter, 12...Detection circuit, 14
...Decoder, 16...Segment display section.

Claims (1)

[Claims for Utility Model Registration] A sound detection circuit that detects external sound, a low-pass filter that removes predetermined harmonic components from the sound signal detected by the sound detection circuit, and a reference signal generator that generates a reference signal. a count synchronization counter capable of counting the reference signal from the reference signal generation circuit and synchronizing the timing of the counter in response to generation of the sound signal output from the low-pass filter; and digits of the count synchronization counter. a shift register that sequentially stores the sound signal from the low-pass filter as data in response to each occurrence of a rising signal; a detection circuit that outputs a direction signal in response to the data stored in the shift register; and this detection circuit. A warning display device comprising: a decoder that creates a display signal in response to a direction signal from the decoder; and a display section that displays a direction based on the display signal from the decoder.