JPH05168100A - Acoustic system with thermal image detection means - Google Patents

Abstract

PURPOSE:To automatically attain the optimum sound field always centered at a human body with the minimum operation by adding a thermal picture detection means consisting of pyroelectric thermal detection element groups added to the sound field device. CONSTITUTION:A thermal picture detection means 3 is installed on an acoustic device 1, detecting the direction, size, and number of the human body. A sound field control means forms the sound field optimum for the person located at an arbitrary position. The means 3 contains a plurality of pyroelectric thermal detection element groups, utilizing the pyroelectric effect in a thermal infrared- ray sensor. A wireless remote controller selects an input to set the tone and volume, the information is sent from a wireless transmission means through a receiver to the main body of the device. According to the setting, the main body 1 starts operating. At the same time, the means 3 detects a thermal image and a means for discriminating human body and a means for detecting the position of human body specify the number and position of the human body. The sound field decision means decides the sound field to set the angle and adjust the volume.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an acoustic device for forming an optimum sound field for a person by using a thermal image detecting means.

[0002]

2. Description of the Related Art There is an audio device in which a person can directly operate or sequentially operate by a wireless remote controller to obtain an optimum sound field.

[0003]

However, in the above-mentioned prior art, it is necessary to individually set the volume and balance in advance, and it is necessary to reset the volume and the balance when a person moves from place to place.

Further, at night, it was necessary to change the setting of the apparatus in order to lower the volume. The present invention provides an acoustic system that realizes a sound field according to the places and the number of persons or time zones.

[0005]

In order to solve the above problems, the present invention provides a thermal image detecting means composed of a plurality of pyroelectric type heat detecting elements, a human body determining means for detecting a person, and a detected person. In addition to having a human body position detecting means for determining the position of the sound field, the center of the sound field is formed with respect to a person at an arbitrary location through the sound field control means.

Further, according to the present invention, the number and positions of persons are detected by the human body determining means and the human body position detecting means, an appropriate center is set for a plurality of persons by using an appropriate means, and a sound field is set in response thereto. To form.

According to the present invention, daytime and nighttime are specified by detecting the temperature distribution inside and outside the room and the transition thereof by the thermal image detecting means, and the sound field is controlled accordingly.

Further, according to the present invention, the thermal image detecting means and the human body position detecting means perform the optimum control of the sound field, and the sound quality and the sound volume can be controlled by the wireless remote controller.

According to the present invention, the pyroelectric heat detecting element group is linearly arranged in a one-dimensional manner, and has a rotation axis parallel to the linear axis or inclined by a certain angle, and the rotation axis is the center. A two-dimensional image is obtained by rotating the pyroelectric heat detection element group.

[0010]

The present invention realizes an acoustic system in which a human body is detected by using a thermal image detecting means, a place and the number of persons are specified, and a sound field corresponding to the human body is formed.

The present invention also realizes an acoustic system in which the thermal image detecting means is used to detect the temperature distribution inside and outside the room to identify the day and night, and to form a sound field corresponding to that.

[0012]

EXAMPLE An example of the present invention will be described with reference to FIGS.

FIG. 1 is a diagram showing a first embodiment of the present invention. In the figure, 1 is an audio device main body, 2 is a speaker connected to 1 by wire or wireless, 3 is a thermal image detecting means, 4
Is a person.

The thermal image detecting means 3 is attached to the acoustic device main body 1, detects the direction, size, number of persons, etc. of the person 4, and the sound field control means detects the optimum sound field for the person 4 at an arbitrary position. To form.

The thermal image detecting means 3 has a plurality of pyroelectric heat detecting element groups built therein. Non-contact temperature measurement methods include a quantum infrared sensor, an infrared CCD sensor, and a thermal infrared sensor. The quantum infrared sensor and the infrared CCD have high sensitivity and fast response speed, but require cooling (about -100 to -200 ° C) and are not suitable for consumer use. On the other hand, the thermal infrared sensor has a relatively low sensitivity, has a slow response speed, but has a feature that cooling is unnecessary. The thermal image detecting means 3 utilizes the pyroelectric effect in the thermal infrared sensor.

FIG. 2 shows an internal block diagram of the audio device of the first embodiment of the present invention. An angle setting means for controlling the angle is built in the speaker. Further, the acoustic device main body has built-in thermal image detecting means 3, human body determining means, human body position detecting means, sound field control means, and wireless receiving means.

The wireless remote controller incorporates input selection means, sound quality, volume, and wireless transmission means.

When the input is selected from the wireless remote controller and the sound quality and volume are set, the information is sent by the wireless transmission means to the main body of the apparatus via the reception means, and the main body starts operating according to the setting. At the same time, the thermal image detection means detects the thermal image, the human body determination means and the human body position detection means identify the number, position, number of persons, size of the person, and further the person, and the sound field determination means determines the corresponding sound. The field is determined, and the sound field is realized by the speaker angle setting means, volume, and balance setting means.

For a plurality of persons, the center of the sound field is sequentially given to each person, an appropriate center is set to form a sound field for that person, or a person is specified to have the highest priority. It has a control mode such as setting the center of the sound field.

The appropriate center is, for example, weighted at a place where a person enters and takes their center of gravity, or
This is done by assuming a circle that covers all of a plurality of people and centering the circle.

The thermal image detecting means is operated continuously or at fixed time intervals, and when the position of the person or the number of persons changes, the above process is repeated to set the sound field again.

FIG. 3 is a diagram showing a second embodiment of the present invention. In the figure, 1 is an audio device main body, 2 is a speaker connected to 1 by wire or wireless, 3 is a thermal image detecting means, 5
Is a window.

The thermal image detecting means 3 is attached to the main body 1 of the acoustic device, and detects the temperature distribution outside the room through the window 5.

The day and night determination means determines the day and night,
The sound field according to the time zone is determined by the sound field determination means, and is realized via the sound field control means.

FIG. 4 shows a block diagram of an audio device according to a second embodiment of the present invention. Similar to the first embodiment, when the input is selected by the wireless remote controller and the sound quality and the volume are set, the information is sent to the apparatus main body by the wireless transmission means via the reception means, and the main body is set according to the setting. Start to work.

At the same time, the thermal image detecting means detects the outdoor temperature distribution, the day and night determining means determines day and night, and the sound field determining means determines a sound field corresponding to the day and night, and the speaker angle setting means, The sound field is realized by the volume and balance setting means. The thermal image detecting means is operated continuously or at fixed time intervals, and the above process is repeated to set the sound field again even if the conditions of day and night change due to the passage of time.

FIG. 5 is a block diagram of an embodiment of the thermal image detecting means 3 in the present invention. Reference numerals 6a to 6e denote pyroelectric heat detection elements (hereinafter referred to as elements) 7, a pyroelectric heat detection element group, and 8 a rotation axis. In FIG. 5A, the rotation axis 8 is parallel to the pyroelectric heat detection element group 7, and in FIG. 5B, the rotation axis 8 is inclined with respect to the pyroelectric heat detection element group 7 by a constant angle θ. The case is shown.
The angle θ is selected according to the structure of the main body supporting portion 2 incorporated and the setting of the detection viewing angle.

Next, a mechanism for obtaining a thermal image by using the pyroelectric heat detecting element group 7 will be described with reference to FIG. FIG. 6A shows the stereoscopic viewing angle of the thermal image to be detected, and FIG. 6B shows the detected thermal image. The pyroelectric heat detection element group 7 has five elements, and divides the viewing angle into five in the vertical direction and takes charge.

The pyroelectric heat detecting element group 7 is used in combination with an optical lens. The viewing angle is set narrow in the horizontal direction, and the viewing angle in the horizontal direction is sequentially moved as the rotary shaft 8 rotates. The pyroelectric thermal detection element group 7 measures the temperature each time the sequential movement is performed, so that a two-dimensional thermal image shown in FIG. 5B is obtained.

Further, the commonly used pyroelectric infrared sensor is a so-called bulk type which uses a sintered body of a pyroelectric thick film, but this bulk type has a problem that the thermal time constant cannot be made small and the response is slow. Have a point Therefore, by using a pyroelectric heat detecting element using a pyroelectric thin film made of PbTiO ₃ or the like, the response time can be reduced to about 1/10 of that of the bulk type. By using the pyroelectric heat detection element using this pyroelectric thin film and shortening the response time, the behavior of the human body can be accurately detected. Furthermore, if a pyroelectric thin film is used, the device can be further downsized.

[0031]

According to the present invention, by adding a thermal image detecting means composed of a plurality of pyroelectric heat detecting element groups to an acoustic device, a person can be anywhere in a room with a minimum of operations. Moreover, even when moving in a room, an optimal sound field centered on a person can be automatically realized.

Further, even at night, the acoustic device detects it and automatically realizes a sound field according to the day and night environment.

Further, according to the present invention, the thermal image can be detected with a relatively simple system configuration by rotating the pyroelectric type heat detection element group arranged in one dimension.

Further, by using the pyroelectric type heat detecting element group of the pyroelectric thin film, the response speed of the thermal image can be improved and the system can be downsized.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a first embodiment of the present invention.

FIG. 2 is an internal block diagram of the audio device according to the first embodiment of the present invention.

FIG. 3 is a configuration diagram of a second embodiment of the present invention.

FIG. 4 is an internal block diagram of an audio device according to a second embodiment of the present invention.

FIG. 5A is a configuration diagram of a thermal image detecting means in a third embodiment of the present invention, and FIG. 5B is a configuration diagram of a thermal image detecting means in a fourth embodiment of the present invention.

FIG. 6A is an explanatory diagram of a mechanism for obtaining a thermal image. FIG. 6B is an explanatory diagram of a mechanism for obtaining a thermal image.

[Explanation of Codes] 1 Acoustic device 2 Speaker 3 Thermal image detecting means 4 Person 5 Window 6a Pyroelectric heat detecting element 6b Pyroelectric heat detecting element 6c Pyroelectric heat detecting element 6d Pyroelectric heat detecting element 6e Pyroelectric Type heat detecting element 6f Pyroelectric type heat detecting element 7 Pyroelectric type heat detecting element group 8 Rotation axis

Claims (6)

[Claims] 1. A thermal image detecting means comprising a plurality of pyroelectric thermal detecting elements, a human body determining means for detecting a person by a signal from the thermal image detecting means, and a position of the person detected by the human body determining means. An acoustic device having a human body position detecting means for determining a sound field, and a thermal image detecting means for forming a sound field centered on a person at an arbitrary position, which is determined by the human body position detecting means via the sound field control means. .. 2. The number and positions of persons are detected by a human body determining means and a human body position detecting means, an appropriate center is set for a plurality of persons, and a sound field is formed for them.
An acoustic device having the thermal image detecting means described. 3. The number and positions of persons are detected by the human body determining means and the human body position detecting means, and the person is designated by the person designating means based on the information, and the person having the highest priority is set. An acoustic device having the thermal image detecting means according to claim 1, which forms a sound field in the center. 4. An acoustic device having a thermal image detecting means according to claim 1, wherein daytime and nighttime are specified by detecting the temperature distribution inside and outside the room and the transition thereof by the thermal image detecting means, and the sound field control is performed accordingly. .. 5. An acoustic device having a thermal image detecting means according to claim 1, which can be remotely controlled by a wireless remote controller. 6. A pyroelectric heat detecting element group is arranged one-dimensionally on a linear axis and has a rotary shaft parallel to the linear axis or inclined by a constant angle, and the pyroelectric centering on the rotary axis. A two-dimensional image is obtained by rotating the mold heat detecting element group.
An acoustic device having the thermal image detecting means described.