JPH0935163A - Automatic setting device for alarm tone - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic alarm tone setting device capable of easily and automatically setting and outputting an alarm tone to be surely recognized even in a large environment sound state. SOLUTION: A transmitting frequency setting part 23 inputs measured frequency obtained by measuring the frequency of an environment sound inputted from a sound collecting microphone 3 from a frequency measuring part 21 and sets and outputs transmitting frequency having a prescribed sound level difference D based upon the inputted measured frequency. At the time of receiving an alarm tone generating request from an alarm transmitting equipment 1, an alarm tone output part 24 outputs the transmitting frequency inputted from the setting part 23 to a speaker 4 as an alarm tone. The prescribed sound level difference D is secured as a minimum value and the setting part 23 sets the transmitting frequency lower or higher than the measured frequency at least by the difference D based upon a state that the inputted measured frequency is higher or lower than previously determined switching frequency A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alarm sound automatic setting device for outputting an alarm sound that is different from the surrounding environmental sound when a request for transmitting an alarm sound is received from the alarm transmitting device, and more particularly, to the surrounding environmental sound. On the other hand, the present invention relates to a warning sound automatic setting device that outputs a warning sound that can be more reliably recognized.

[0002]

2. Description of the Related Art Conventionally, in this type of alarm sound automatic setting device, as described in, for example, Japanese Unexamined Patent Publication No. 3-49723, the loudness of an alarm sound generated from a speaker according to the ambient noise condition. Is adjusted so that the alarm sound can be recognized.

In this example, when a device warning request is received,
Disclosed is an automatic volume adjusting device in which a speaker receiving an alarm sound, which is adjusted by calculating an input value to an amplifier by a signal related to a noise level from a sound sensor that senses a surrounding noise state, through a amplifier is output. There is.

[0004]

Since the above-described conventional alarm sound automatic setting device is configured so that the volume of the alarm sound can be automatically increased and recognized according to the ambient noise condition, the environmental sound can be recognized. When the alarm sound and the alarm sound have the same frequency and the environmental sound is large, there is a problem that it is difficult to distinguish between them and the alarm cannot be recognized.

An object of the present invention is to easily and automatically set an alarm sound that can be reliably recognized even in a situation where the environmental sound is loud,
It is to provide an alarm sound automatic setting device that can output.

[0006]

SUMMARY OF THE INVENTION An alarm sound automatic setting device according to the present invention outputs an alarm sound different from the surrounding environmental sound when an alarm sound transmission request is issued from an alarm transmitting device. In, the input frequency measuring unit that measures the frequency of the environmental sound input from the sound collecting microphone and outputs the measurement frequency, and inputs the measurement frequency, and sets the transmission frequency having a predetermined pitch difference from the input measurement frequency. And a warning sound output unit that outputs the warning signal output from the warning frequency setting unit as a warning sound to the speaker when a warning sound transmission request is received from the warning transmitter. .

Further, as a more concrete means of implementation,
If the predetermined pitch difference is at least one of a fixed value and a minimum value, and in the transmission frequency setting unit, the switching frequency is predetermined and the input measurement frequency is lower than the switching frequency, the transmission frequency is While the pitch difference is set to be higher than the switching frequency by at least, when the input measurement frequency is higher than the switching frequency, the transmission frequency is set to be lower than the switching frequency by at least the pitch difference.

[0008]

Next, the present invention will be described with reference to the drawings.

FIG. 1 is a functional block diagram showing an embodiment of the present invention. Alarm sound automatic setting device 2 shown in FIG.
Includes an input frequency measurement unit 21, an output pitch setting unit 22, a transmission frequency setting unit 23, and an alarm sound output unit 24.

The alarm transmission device 1 connected to the alarm sound automatic setting device 2 is usually included in a monitoring device, and when an alarm that needs to be made known occurs, the alarm sound automatic setting device 2 is caused to send an alarm sound. Request. The alarm sound output unit 24 receives this request. Further, the sound collection microphone 3 collects the environmental sound of the installation place of the speaker 4 which sends the warning sound received from the warning sound automatic setting device 2, and sends it to the warning sound automatic setting device 2.

The input frequency measuring section 21 measures the strongest frequency of the environmental sound received from the sound collecting microphone 3 and outputs the obtained frequency to the transmission frequency setting section 23 as the measured frequency. On the other hand, in the output pitch setting unit 22, the switching frequency A and the pitch difference D are preset, and the switching frequency A and the pitch difference D are output to the transmission frequency setting unit 23.

The transmission frequency setting unit 23 compares the measurement frequency received from the input frequency measuring unit 21 with the switching frequency A of the output pitch setting unit 22, and if the measurement frequency is the same as or lower than the switching frequency, the transmission frequency setting unit A transmission frequency that is higher by the pitch difference D is set and output to the alarm sound output unit 24, while
When the measurement frequency is higher than the switching frequency, the alarm sound output section 2 is set by setting the transmission frequency lower than the measurement frequency by the pitch difference D.
It is output to 4.

The alarm sound output unit 24 outputs an alarm sound having the transmission frequency output by the transmission frequency setting unit 23 to the speaker 4 when receiving the transmission request of the alarm sound from the alarm transmission device 1.

Next, the function of the transmission frequency setting unit 23 in the above-described embodiment will be specifically described as a first example with reference to FIG. 1 and FIG. FIG. 2 is an explanatory diagram showing the relationship between the measured frequency and the transmission frequency according to the first embodiment.

As shown, the transmission frequency setting unit 23
In the measurement frequency range lower than the switching frequency A, the transmission frequency is set higher than the measurement frequency by a fixed pitch difference D (Hz), while in the measurement frequency range higher than the switching frequency A, the transmission frequency is set to be constant from the measurement frequency. Pitch difference D (H
z) is set low. For example, when the measurement frequency B lower than the switching frequency A is received, the transmission frequency E higher than the measurement frequency B by the pitch difference D is set and output. Similarly, when the measurement frequency C higher than the switching frequency A is received, the transmission frequency F lower than the measurement frequency C by the pitch difference D is set and output.

The transmission frequency having a substantially constant pitch difference D with respect to the input of the measured frequency in the transmission frequency setting section 23 can be easily and accurately set and output by program control.

As described above, since the alarm sound having the predetermined pitch difference D with respect to the environmental sound is transmitted from the speaker 4, the alarm sound can be issued by a maintenance person, an operator, etc. without increasing the volume more than necessary. Can be surely recognized.

Next, a second embodiment will be described with reference to FIG.

The difference between FIG. 3 and FIG. 1 is that an output frequency setting unit 22 is provided instead of the output pitch setting unit 22, and the function of the transmission frequency setting unit 26 is changed due to this change.

Next, the second embodiment will be described in detail with reference to FIGS.

As shown in the figure, the transmission frequency generator 25 generates four transmission frequencies M, N, P and Q from low to high and outputs them to the transmission frequency setting unit 26. On the other hand, in the transmission frequency setting unit 26 that receives the transmission frequencies M, N, P, and Q, the measurement frequencies H, J, A, K, and L are set in ascending order, and transmission is performed based on the measurement frequency received from the input frequency measurement unit 21. One is selected for the frequencies M, N, P, and Q.

Next, the set transmission frequencies M, N, P,
The relationship between Q and the measurement frequencies H, J, A, K, L will be described.

As shown in FIG. 4, the transmission frequency M is
It has a frequency lower than the measurement frequency A by the pitch difference D, and is used in the range from the measurement frequency A to the higher measurement frequency K. Further, the transmission frequency N is the measurement frequency H
It has a frequency higher by the pitch difference D and lower by the pitch difference D than the measurement frequency K. From the measurement frequency H to the lower measurement frequency range and from the measurement frequency K,
It is used in a range up to a higher measurement frequency L. Similarly, the transmission frequency P has a frequency higher than the measurement frequency J by the pitch difference D and lower than the measurement frequency L by the pitch difference D, and is lower than the measurement frequency J by the pitch difference H.
Up to and from the measurement frequency L to a higher measurement frequency range. Further, the transmission frequency Q has a frequency higher than the measurement frequency A by the pitch difference D,
It is used in the range from the measurement frequency A to the lower measurement frequency J.

Therefore, in the transmission frequency generator 25,
The transmission frequencies M, N, P, and Q of the alarm sound set based on the input measurement frequency ensure the pitch difference D in the first embodiment, and the switching frequency A is used. Since the types of transmission frequencies are limited, the setting control can be performed by simple selection.

In the above description, regarding the set transmission frequency, the first embodiment having a constant pitch difference with respect to the measurement frequency and the one having a pitch difference of a predetermined value or more with respect to the predetermined range of the measurement frequency are described. Although the second embodiment selected from the plurality has been described, both may be mixed, and further,
The pitch difference or the transmission frequency may have a predetermined change value while ensuring a predetermined pitch difference.

Although it has been described that the alarm sound output request from the alarm transmitting device is received by the alarm sound output unit, it is received by the transmission frequency setting unit, and the transmission frequency setting unit receives the request and sets the transmission frequency. Should be output to the alarm sound output unit.

Further, although it has been explained that the alarm sound has a frequency different from the environmental sound, it goes without saying that the recognition can be further confirmed by taking into consideration the change in the conventional volume.

As described above, the functions can be freely distributed as long as they satisfy the above functions, and the present invention is not limited to the above description.

[0029]

As described above, according to the present invention, the transmission frequency having a predetermined pitch difference from the measured frequency of the frequency of the environmental sound input from the sound collecting microphone is set, and the alarm transmission device issues the alarm sound. It is possible to obtain an alarm sound automatic setting device that outputs this transmission frequency as an alarm sound to a speaker when a request for transmission is received. With this configuration, the alarm sound having a pitch difference of a predetermined magnitude from the environmental sound is sent from the speaker, so that the maintenance person or the driver can surely recognize the alarm sound even when the environmental sound is large.

[Brief description of drawings]

FIG. 1 is a functional block diagram showing an embodiment as a first example of the present invention.

FIG. 2 is an explanatory diagram of a relationship in which an oscillation frequency is set from the measurement frequency of FIG.

FIG. 3 is a functional block diagram showing a second embodiment of the present invention.

FIG. 4 is an explanatory diagram of a relationship for setting an oscillation frequency from the measurement frequency of FIG.

[Explanation of symbols]

 1 Alarm transmission device 2, 20 Alarm sound automatic setting device 3 Sound collecting microphone 4 Speaker 21 Input frequency measurement unit 22 Output pitch setting unit 23, 26 Transmission frequency setting unit 24 Warning sound output unit 25 Transmission frequency generating unit

Claims (4)

[Claims] 1. A frequency of environmental sound input from a sound collecting microphone is measured in an automatic alarm sound setting device that outputs an alarm sound that differs from the surrounding environmental sound when a request is issued from the alarm transmission device. And an input frequency measuring unit for outputting a measured frequency, an outgoing frequency setting unit for inputting the measured frequency, setting and outputting an outgoing frequency having a predetermined pitch difference from the input measured frequency, and an alarm from an alarm sending device. An alarm sound automatic setting device, comprising: an alarm sound output unit that outputs a sound frequency input from the transmission frequency setting unit to a speaker as a sound when a sound transmission request is received. 2. The alarm sound automatic setting device according to claim 1, wherein the predetermined pitch difference is at least one of a constant value and a minimum value. 3. A frequency of environmental sound input from a sound collecting microphone is measured in an automatic alarm sound setting device which outputs an alarm sound different from the surrounding environmental sound when a request for transmitting an alarm sound is received from the alarm transmission device. An input frequency measuring section for outputting a measured frequency, an oscillation frequency generating section for generating and outputting at least two fixed oscillation frequencies, and inputting the measurement frequency,
From the fixed transmission frequency, select and set one transmission frequency having a predetermined pitch difference from the input measurement frequency,
A transmission frequency setting unit for outputting, and an alarm sound output unit for outputting the transmission frequency input from the transmission frequency setting unit to the speaker as an alarm sound when a request for transmitting an alarm sound is received from the alarm transmission device. Automatic alarm sound setting device. 4. The transmission frequency setting unit according to claim 1 or 3, wherein a switching frequency is predetermined, and when the input measurement frequency is lower than the switching frequency, the transmission frequency is at least lower than the switching frequency. An automatic alarm sound setting device, wherein when the input measurement frequency is higher than the switching frequency while the pitch difference is set higher, the transmission frequency is set lower than the switching frequency by at least the pitch difference.