JP5288416B2 - Moving body motion posture detection device - Google Patents

Description

  The present invention relates to a moving body posture detection apparatus.

  Conventionally, the device is attached to or carried by a person's body, and the movement (walking, dynamic, static, etc.) and body position (standing, sitting, lying, etc.) and accelerometer, angle sensor, tilt sensor Images that use a CCD camera, human body detection sensor, pyroelectric infrared sensor to detect and identify a person's fall, posture, movement, and posture in a toilet at the installation location, etc. A method of detecting and specifying with an input device or the like has been proposed (see Patent Documents 4 to 6).

Japanese Patent Laid-Open No. 06-285046 JP-A-10-165395 JP 2004-81632 A JP 2001-28086 A JP 2001-67567 A JP 05-149725 A

However, in the method of mounting or carrying the device itself on a human body as described in Patent Documents 1 to 3, it must be worn or carried for 24 hours a day. In addition, you may forget to wear or carry.
In addition, in image input devices using human body detection sensors and pyroelectric infrared sensors as described in Patent Documents 4 and 5, sunlight, incandescent light bulbs, warm air from heating equipment, humidification, which are heat sources other than the human body It is prone to malfunction due to reaction to water vapor in the vessel, heated toilet seat in the toilet, etc., and it cannot be detected if there is an object that does not transmit infrared rays, such as glass, walls, walls, etc. Detection is difficult when the body movement is small, such as at high speed or during sleep, and in addition, the body movement is small when the toilet is used or at bedtime, and thus cannot be detected.
In the CCD camera described in Patent Document 4, it is said that the problem of privacy has been solved, but at least a person is conscious of being photographed and is avoided. Furthermore, in the method described in Patent Document 4, the body position is determined by the bright spot projecting means and the bright spot image capturing means such as a CCD camera. However, the determination calculation processing is performed after fixing the installation position relationship of each means. Desired. Also, the installation work is difficult.
In addition, the method described in Patent Document 5 cannot determine the posture.
In the method described in Patent Document 6, it is difficult to determine the position of the image input device using the pyroelectric infrared sensor, which is an image input means, depending on the height of the person and the reflection angle. Become. Furthermore, it is necessary that a person exists at least in the shooting range.

  Therefore, the present invention is a method of installing a device in the vicinity of a person without attaching or carrying the device itself to the human body, and does not cause malfunction due to a heat source other than a moving body such as a human body, and at the time of sleeping, etc. It is an object of the present invention to provide a moving body position detecting apparatus that can detect a minute movement of a moving body and that can detect the body position more accurately.

The present inventor has intensively studied in order to solve the above-mentioned problems and completed the present invention.
The present invention includes the following (1) to (3).
(1) A Doppler device that radiates a transmission wave that is a radio wave or a sound wave to a moving body, receives a reflected wave, and outputs a frequency difference between the transmitted wave and the reflected wave as an electrical signal; a low-pass filter; a high-pass filter; Two or more filter circuits, each including at least one selected from the group consisting of a band pass filter, for extracting two or more specific frequency bands in the electrical signal received from the Doppler device, and passing the two or more filter circuits. Comparator means for determining whether or not the absolute value of the voltage is equal to or higher than a reference voltage in each of the two or more electrical signals in the specific frequency band that have been taken out, and outputting the determination result as a signal; and the comparator means The absolute value of the voltage is the reference voltage in each of the specific frequency bands using the signal output from Rectifying means for outputting a signal including information on the specific frequency band for distinguishing between a time included in a preset set time from when it is above or no longer than the reference voltage and a time other than the reference voltage And a recording unit that records data in which the signal output from the rectifying unit and the posture of the moving body are associated with each other, and receives the signal output from the rectifying unit and uses the data recorded in the recording unit And a moving body motion posture detecting device having a processing unit for determining the posture of the moving body.
(2) The Doppler device emits the transmission wave at two or more heights in the vertical direction and outputs the electric signal at each height, and the filter circuit has the electric signal at each height. In the signal, the specific frequency band is extracted, and the comparator means outputs the determination result as a signal in the electric signal at each height, and the rectifier means at the height A signal including information on a specific frequency band is output, and the recording unit records data in which the signal output from the rectifier and the posture of the moving body are associated with each height. The moving body posture detection apparatus according to (1) above.
(3) The mobile body posture detection apparatus according to (1) or (2), further determining whether the determined posture is a specific posture and issuing an alarm if the determined posture is the specific posture.

  According to the present invention, malfunctions due to heat sources other than the human body do not occur in a room with a heater such as a stove, a bathroom, or a heated toilet seat type toilet. It is also possible to detect minute movements due to breathing when the body is stationary. Furthermore, the body position (standing position, sitting position, and prone position) can be detected accurately. As a result, it is possible to confirm safety based on the situation of a fall or a daily activity when a person walks. In addition, when confirming access to the installed space, the presence / absence, home / outing, etc. can be ascertained without using a magnetic opening / closing sensor for opening / closing the door.

It is the schematic which shows the example which installed the apparatus of this invention in the toilet. It is the schematic which shows the example which installed the apparatus of this invention in the bathroom. It is the schematic which shows the example which installed the apparatus of this invention indoors. It is another schematic diagram which shows the example which installed the apparatus of this invention indoors. It is a flowchart for demonstrating the apparatus of this invention. It is the schematic for demonstrating a filter circuit. It is the schematic for demonstrating a Doppler signal switch. It is another schematic diagram for demonstrating a Doppler signal switch. It is a figure which shows the specific example for demonstrating the comparator means and the rectification | straightening means in the apparatus of this invention. It is a figure which shows the data recorded on the recording part in the Example. It is a figure which shows the data recorded on the recording part in another Example.

The present invention will be described in detail below.
Hereinafter, the mobile body movement position detection device of the present invention is also simply referred to as “the device of the present invention”.

The apparatus of the present invention can be used by installing it in a toilet as shown in FIG. When the device of the present invention is installed in a toilet, when an elderly person who uses the toilet falls down due to poor physical condition in the toilet, for example, it promptly informs others (family members, etc.) who are outside the toilet Can do.
Moreover, the apparatus of this invention can be installed and used, for example as shown in FIG. When the device of the present invention is installed in a bathroom, when an elderly person using the bathroom falls in a bad condition, for example, in the bathroom, it promptly informs others (family members, etc.) who are outside the bathroom Can do. It can also be installed indoors or in hallways to perform the same function.
Moreover, the apparatus of this invention can be used as a crime prevention apparatus as shown, for example in FIG. When the apparatus of the present invention is installed in a room, a front door, or the like, it is possible to determine the presence or absence of an intruder in the absence and transmit the determination result to a landlord or a security guard company who is out.
Moreover, the apparatus of this invention can be used as a safety confirmation apparatus, for example, as shown in FIG. When the apparatus of the present invention is installed in a room or the like, it is possible to notify, for example, a person who is out and about the safety of a child or an elderly person who has an answering machine.
The device of the present invention can be used as a safety confirmation device. By using the apparatus of the present invention to monitor, for example, on the rails of a train, it is determined whether or not a moving body such as a person exists on the rails. I can inform you.

<Doppler device>
The apparatus of the present invention includes a Doppler device that radiates a transmission wave that is a radio wave or a sound wave to a moving body, receives a reflected wave, and outputs a frequency difference between the transmitted wave and the reflected wave as an electric signal.
Here, the moving body means a “movable object”, and specific examples include living bodies (people, animals, etc.), trains, and automobiles.
The transmission wave radiated from the Doppler device to the moving body is a radio wave or a sound wave, and is preferably a radio wave. The frequency of a transmission wave that is a radio wave or a sound wave is preferably 10 GHz to 25 GHz. Moreover, it is preferable that it is 20 KHz-1000 KHz.

The Doppler device included in the device of the present invention can radiate a transmission wave to a moving body, can receive a reflected wave reflected by it, and can further determine the frequency difference between the transmission wave and the reflected wave as an electric signal. As a function that can be output as
If it has such a function, the Doppler apparatus which the apparatus of this invention has is not specifically limited. Specific examples of the Doppler device included in the device of the present invention include model number NJR4178J (10.5 GHz band) and model number NJR4261J (24 GHz band) manufactured by New Japan Radio Co., Ltd.

Examples of the apparatus of the present invention include those of the embodiment shown in FIG. 5 (the apparatus 10 of the present invention), and like the one shown in FIG. 5, the transmission waves are radiated at two or more heights in the vertical direction. It is preferable to use a Doppler device 100 that outputs the electrical signal at each height. In the embodiment shown in FIG. 5, the Doppler device can radiate the transmission waves 101a and 102a from the antennas 121 and 122 to the moving body (person 2 in FIG. 5), and receives the reflected waves 101b and 102b reflected thereby. Furthermore, the frequency difference between the transmitted waves 101a and 102a and the reflected waves 101b and 102b can be output as the electric signals 111 and 112.
As described above, the Doppler device in the device of the present invention radiates the transmission wave to the movable body at two or more heights in the vertical direction, receives the reflected wave at each height, and receives the electric wave at each height. A Doppler device that outputs a signal is preferable because the posture of the moving body can be more accurately determined. As such an aspect, in addition to the aspect having an antenna or the like that can radiate a transmission wave at each of the desired heights shown in FIG. 5, the part such as one antenna that can radiate a transmission wave moves in the vertical direction. The aspect which can radiate | transmit a transmission wave in each of several desired height is mentioned. Also, two or more portions such as antennas that can radiate transmission waves may move in the vertical direction to radiate transmission waves at a desired height. Further, for example, a swinging mode is possible in which a portion such as one antenna that can radiate a transmission wave can radiate a transmission wave to a desired portion in the vertical direction.

  Further, for example, the Doppler device itself may move in a room as shown in FIGS.

  Moreover, it is preferable to use an H-plane fan-shaped horn antenna as an antenna that radiates a transmission wave. This is because the directivity is high and the transmission wave can be emitted only at a desired height.

<Filter circuit>
The apparatus of the present invention comprises at least one filter circuit comprising at least one selected from the group consisting of a low-pass filter, a high-pass filter, and a band-pass filter, and two or more filter circuits for extracting two or more specific frequency bands in the electrical signal received from the Doppler device. Have.
That is, the device of the present invention has two or more filter circuits for one of the electrical signals received from the Doppler device. For example, in the case shown in FIG. 5, two filter circuits exist for each of the two electric signals 111 and 112 output from the Doppler device using two antennas.

The filter circuit is an electric circuit for extracting a specific frequency component from the input electric signal. The high-pass filter is also called a high-pass filter, and is a filter circuit that extracts a high frequency component of an electric signal. According to the high pass filter, frequency components lower than the desired frequency are suppressed. The low-pass filter is also called a low-pass filter, and is a circuit that extracts a low frequency component of an electric signal. According to the low-pass filter, a frequency component higher than a desired frequency is suppressed. The band-pass filter is also called a band-pass filter, and is a filter circuit that extracts a specific frequency component of an electric signal.
As each of the low-pass filter, the high-pass filter, and the band-pass filter, for example, the mode shown in FIG.

  The apparatus of the present invention comprises at least one selected from the group consisting of a low pass filter, a high pass filter and a band pass filter as shown in FIG. 6, for example. And it has two or more filter circuits which take out two or more specific frequency bands in the electric signal.

The filter circuit included in the apparatus of the present invention includes, for example, as shown in FIG. 5, a filter circuit 201a and a filter circuit 202a composed of a low-pass filter and a high-pass filter, and a filter circuit 201b and a filter circuit 202b composed of a low-pass filter.
Here, two specific frequency bands in the electric signal 111 can be extracted by the filter circuits 201a and 201b. For example, when the filter circuit 201a is a low-pass filter that does not pass 40 Hz or more and a high-pass filter that does not pass 2 Hz or less, the filter circuit 201a can extract a specific frequency band of 2 to 40 Hz. If the filter circuit 201b is a low-pass filter that does not pass 2 Hz or more, the filter circuit 201b can extract a specific frequency band of 0 to 2 Hz.
The electric signal 211a and the electric signal 211b in the specific frequency band extracted by passing each of the filter circuit 201a and the filter circuit 201b are output to the comparator means.
The apparatus of the present invention preferably includes amplifiers 205a, 205b, and 205c that amplify the electric signals 111 and 112 output from the Doppler apparatus 100, as shown in FIG.

  Moreover, it is preferable that two or more specific frequency bands taken out by the filter circuit included in the apparatus of the present invention include a relatively low frequency band and a relatively high frequency band. For example, when sitting in a chair, sleeping, or lying down, the movement of a moving body such as a person is stationary, and the output of the Doppler electric signal is concentrated in a low frequency band. On the other hand, when a moving body such as a person is active such as walking, the output of the Doppler electric signal is concentrated in a high frequency band. For example, as described above, it is preferable to extract a specific frequency band of 0 to 2 Hz as a relatively low frequency band and a specific frequency band of 2 to 40 Hz as a relatively high frequency band by a filter circuit.

  Moreover, it is preferable that the specific frequency bands taken out by the filter circuit included in the device of the present invention do not overlap each other. For example, as described above, when the specific frequency band of 2 to 40 Hz is extracted by the filter circuit 201 and the specific frequency band of 0 to 2 Hz is extracted by the filter circuit 202, there is no overlapping portion.

The Doppler device is a Doppler device that radiates the transmission wave to the moving body at two or more heights in the vertical direction, receives the reflected wave at each height, and outputs the electrical signal at each height. It is preferable that a switch is provided between the Doppler device and the filter circuit so that only the electrical signal at a specific height can be input to the filter circuit.
For example, in the case of having an antenna that can radiate a transmission wave at three heights in the vertical direction as shown in FIG. 7, if the device of the present invention has a switch 150 between the Doppler device 100 and the filter circuit 250, Each of the electric signals indicating the frequency difference acquired from the antennas 121, 122, and 123 can be freely input to the filter circuit.
On the other hand, as in the case shown in FIG. 7, even when an electric signal indicating a frequency difference is acquired from each of the three antennas 121, 122, 123, each of the electric signals 111, 112, 113 is shown in FIG. 8. It is possible to have three filter circuits 201, 202, and 203 that individually receive. In this case, the switch 150 is not necessary. Here, there are two or more filter circuits in each filter circuit. For example, the filter circuit 250 illustrated in FIG. 7 includes a filter circuit 250a and a filter circuit 250b, and the filter circuit 201 illustrated in FIG. 8 includes a filter circuit 201a and a filter circuit 201b.

<Comparator means and rectifying means>
The device of the present invention determines whether or not the absolute value of the voltage is equal to or higher than a reference voltage in each of the two or more specific frequency band electrical signals extracted by passing through the two or more filter circuits. And comparator means for outputting the determination result as a signal.
The comparator means can be implemented in a central processing unit in the computer.

The apparatus of the present invention has a comparator means for each of the electric signals of the two or more specific frequency bands taken out by passing through the two or more filter circuits. When the Doppler device radiates the transmission wave at two or more heights in the vertical direction to the moving body, receives the reflected wave at each height, and outputs the electrical signal at each height, The comparator means preferably outputs the determination result as a signal in the electrical signal at each height.
For example, when the apparatus of the present invention is in the form shown in FIG. 5, the apparatus 10 of the present invention determines whether or not the absolute value of the voltage in the electrical signal 211a taken out through the filter circuit 201a is equal to or higher than the reference voltage. Comparator means 301a for judging, comparator means 301b for judging whether or not the absolute value of the voltage in the electric signal 211b taken out through the filter circuit 201b is equal to or higher than the reference voltage, and taken out through the filter circuit 202a Comparator means 302a for determining whether or not the absolute value of the voltage in the electric signal 212a is equal to or higher than the reference voltage, and the absolute value of the voltage in the electric signal 212b taken out through the filter circuit 202b is equal to or higher than the reference voltage. Comparator means 302b for determining whether or not the
Then, the comparator unit 301a determines whether or not the absolute value of the voltage in the electric signal 211a is equal to or higher than the reference voltage, and outputs the result as a signal 311a. Similarly for the comparator means 301b, 302a, 302b, it is determined whether or not the absolute value of the voltage in the electric signals 211b, 212a, 212b is equal to or higher than the reference voltage, and the result is designated as signals 311b, 312a, 312b. Output.

In addition, the apparatus of the present invention uses the signal output from the comparator means in advance in each of the specific frequency bands from the time when the absolute value of the voltage is equal to or higher than the reference voltage or when it is no longer equal to or higher than the reference voltage. Rectification means for outputting a signal including information on the specific frequency band for distinguishing between a time included in the set time and a time other than the set time.
The rectifying means can be implemented in a central processing unit in the computer.

  When the Doppler device radiates the transmission wave at two or more heights in the vertical direction to the moving body, receives the reflected wave at each height, and outputs the electrical signal at each height, The rectifying means preferably outputs a signal including information on the specific frequency band at each height.

  The comparator means and the rectifying means will be described with reference to FIG. FIG. 9A is a specific example of a graph showing in time series the voltage of the electrical signal 211b in a specific frequency band extracted by passing through the filter circuit 201b in the apparatus of the present invention described with reference to FIG. In FIG. 9B, the comparator 301b determines whether or not the absolute value of the voltage of the electrical signal 211b shown in FIG. 9C is a graph showing 311b, and FIG. 9C is set in advance when the signal 311b shown in FIG. 9B is equal to or higher than the reference voltage or when the absolute value of the voltage is not higher than the reference voltage. It is the graph which showed the signal 410 which discriminate | determines them by judging by the rectification | straightening means 400 whether it is included during the set time.

  The reference voltages 20 and 20 ′ in FIG. 9A are set in advance. They are provided on the plus side and the minus side, and usually have the same absolute value. This absolute value is not particularly limited, and is determined by the nature of the moving object. For example, when the moving body is a person, the absolute value of the reference voltage is preferably about 1V.

In the time indicated by T ₁ , T ₂ and T ₃ in FIG. 9A, the absolute value of the electric signal 211b is equal to or higher than the reference voltage. Therefore, at these times, the comparator means 301b outputs a signal 311b indicating that the absolute value of the electric signal 211b is equal to or higher than the reference voltage. When the absolute value of the electrical signal 211b is equal to or higher than the reference voltage, “1” is output as the signal 311b, and “0” is output otherwise, and the result is shown in FIG. It shows. The comparator means preferably outputs a binary signal such as “1” or “0”. The comparator means may output a digital signal or an analog signal.

In FIG. 9B, t ₀ , t ₂ and t ₄ change from less than the reference voltage to the absolute value of the electric signal 211b exceeding the reference voltage, and the signal 311b output from the comparator unit 301b changes from “0” to “1”. , T ₁ , t _3, and t ₅ indicate that the absolute value of the electric signal 211b changes from the reference voltage to less than the reference voltage, and the signal 311b output from the comparator unit 301b is “1”. ”To“ 0 ”.

  In FIG. 9 (c), the signal 311b shown in FIG. 9 (b) is “when the absolute value of the voltage is equal to or higher than the reference voltage” or “a preset time from when the voltage is no longer equal to or higher than the reference voltage”. It is determined by the rectifying means 400 whether the signal is included in between, and when it is included, “1” is output as the signal 410, and when it is not included, “0” is output. Thus, it is preferable that the rectifier outputs a binary signal. The rectifier may output a digital signal or an analog signal. In the case shown in FIG. 9C, the set time is 2 seconds. This set time is not particularly limited, and is determined by the nature of the moving object. For example, when the moving body is a person, the set time is preferably 0.5 to 5 seconds, and more preferably about 2 seconds.

In FIG. 9C, since the time between t ₀ and t ₁ is “when the absolute value of the voltage is equal to or higher than the reference voltage”, the rectifier 400 outputs “1” as the signal 410. The period between t ₁ and t ₂ is not “when the absolute value of the voltage is equal to or higher than the reference voltage”, but is shorter than 2 seconds set in advance. Since it corresponds to “a preset time from t ₁ )”, the rectifier 400 outputs “1” as the signal 410. The period between t _{3 and} t _{4 is} the same as that between t _{1 and} t ₂ .
After t ₅ , the signal 410 output from the rectifying means 400 is “0”. However, during the period from t ₅ to t ₆ after the set time has elapsed (here 2 seconds later), “the reference The rectifier 400 outputs “0” as the signal 410 since it corresponds to a “preset time set when the voltage is no longer than the voltage”.
After t _{6, the} signal 311b output from the comparator unit 301b is “0” and does not correspond to “a preset time from when the reference voltage is not equal to or higher than the reference voltage”. The signal 410 output from the rectifying means 400 is “0”.

The signal output from the rectifying means includes a signal output from the comparator means that is “when the absolute value of the voltage is equal to or higher than the reference voltage” or “a preset time from when the voltage is no longer equal to or higher than the reference voltage”. The judgment result of whether it is included in between is included. For example, information as shown in FIG. 9C (for example, information of “0” or “1”) is included.
And the signal output from such a rectification | straightening means contains the information of the said specific frequency band. Here, the information on the specific frequency band is information on the frequency band of the electrical signal extracted using the filter circuit (for example, information indicating the range of the frequency band), and the Doppler device is in a vertical direction. In the case of having antennas or the like at two or more heights and outputting the electrical signal at each height, information on the height is included. For example, in the case described with reference to FIGS. 5 and 9, the signal 410 includes information “0” or “1”, information indicating that the information is acquired from the antenna 121, and the electric signal 111. And information indicating that the portion of 0 to 2 Hz is extracted as a specific frequency band.

<Recording section>
The apparatus of the present invention includes a recording unit that records data in which the signal output from the rectifying unit and the posture of the moving body are associated with each other.
That is, whether or not the signal output from the comparator means is included between “when the absolute value of the voltage is greater than or equal to the reference voltage” or “a preset time from when the absolute value of the voltage is not greater than or equal to the reference voltage”. Information (hereinafter referred to as “information α”), information indicating from which antenna the information was acquired (referred to as “information β”), and information indicating the specific frequency band (“information γ”) ”), And data that associates information indicating the posture of the moving body (“ information θ ”) in accordance with each combination is obtained in advance through experiments and the data is recorded. Record in the department. The contents of this data can vary depending on the location where the apparatus of the present invention is installed and various conditions.

  This will be specifically described using the example described with reference to FIGS. Here, as in the case described with reference to FIG. 9, the signal output from the comparator means is set in advance from “when the absolute value of the voltage is equal to or higher than the reference voltage” or “when it is no longer equal to or higher than the reference voltage” The signal output from the rectifying means as information α indicating that is included as “1”, and the signal output from the comparator means is “the absolute value of the voltage”. Is not included between “when the reference voltage is equal to or higher than the reference voltage” and “the preset time from when the reference voltage is no longer equal to or higher than the reference voltage”, the signal output from the rectifying means as information α indicating that “0” is included.

  In such a case, the apparatus of the present invention has a recording unit that records, for example, the following data A to E as data in which the signal output from the rectifier and the posture of the moving body are associated with each other.

[Data A]
The information β is information indicating that the information β is acquired from the antenna 121, and the information α is information indicating that the frequency band of 0 to 2 Hz in the electric signal received from the Doppler device is extracted by the filter circuit. “0” and information β indicating that the information β is acquired from the antenna 121, and information γ indicates that the frequency band of 2 to 40 Hz in the electric signal received from the Doppler device is extracted by the filter circuit. In the case of information, the information α is “0”, and the information β is information indicating that the information is acquired from the antenna 122, and the information γ is 0 to 2 Hz in the electric signal received from the Doppler device by the filter circuit. When the information indicates that the frequency band has been extracted, the information α is “0” and the information β is acquired from the antenna 122. If the information α is “0” when the information γ is information indicating that the frequency band of 2 to 40 Hz in the electrical signal received from the Doppler device is extracted by the filter circuit. , The data θ is data “information does not exist”.

[Data B]
The information β is information indicating that the information β is acquired from the antenna 121, and the information α is information indicating that the frequency band of 0 to 2 Hz in the electric signal received from the Doppler device is extracted by the filter circuit. “1” and information β indicating that the information β is acquired from the antenna 121, and information γ indicates that the frequency band of 2 to 40 Hz in the electrical signal received from the Doppler device is extracted by the filter circuit. In the case of information, the information α is “1”, and the information β is information indicating that the information is acquired from the antenna 122, and the information γ is 0 to 2 Hz in the electric signal received from the Doppler device by the filter circuit. When the information indicates that the frequency band has been extracted, the information α is “1” and the information β is acquired from the antenna 122. If the information α is “1” when the information γ is information indicating that the frequency band of 2 to 40 Hz in the electric signal received from the Doppler device is extracted by the filter circuit. , Information θ is data B indicating that the moving object exists and is active in a standing state.

[Data C]
The information β is information indicating that the information β is acquired from the antenna 121, and the information α is information indicating that the frequency band of 0 to 2 Hz in the electric signal received from the Doppler device is extracted by the filter circuit. “1” and information β indicating that the information β is acquired from the antenna 121, and information γ indicates that the frequency band of 2 to 40 Hz in the electrical signal received from the Doppler device is extracted by the filter circuit. In the case of information, the information α is “0”, and the information β is information indicating that the information is acquired from the antenna 122, and the information γ is 0 to 2 Hz in the electric signal received from the Doppler device by the filter circuit. When the information indicates that the frequency band has been extracted, the information α is “1” and the information β is acquired from the antenna 122. If the information α is “0” when the information γ is information indicating that the frequency band of 2 to 40 Hz in the electrical signal received from the Doppler device is extracted by the filter circuit. , The data θ is data C that “the moving body exists and is stationary in a standing state”.

[Data D]
The information β is information indicating that the information β is acquired from the antenna 121, and the information α is information indicating that the frequency band of 0 to 2 Hz in the electric signal received from the Doppler device is extracted by the filter circuit. “1” and information β indicating that the information β is acquired from the antenna 121, and information γ indicates that the frequency band of 2 to 40 Hz in the electrical signal received from the Doppler device is extracted by the filter circuit. In the case of information, the information α is “0”, and the information β is information indicating that the information is acquired from the antenna 122, and the information γ is 0 to 2 Hz in the electric signal received from the Doppler device by the filter circuit. When the information indicates that the frequency band has been extracted, the information α is “0” and the information β is acquired from the antenna 122. If the information α is “0” when the information γ is information indicating that the frequency band of 2 to 40 Hz in the electrical signal received from the Doppler device is extracted by the filter circuit. , Information D is data D that “the moving body is present and is stationary in a fallen state”.

[Data E]
The information β is information indicating that the information β is acquired from the antenna 121, and the information α is information indicating that the frequency band of 0 to 2 Hz in the electric signal received from the Doppler device is extracted by the filter circuit. “1” and information β indicating that the information β is acquired from the antenna 121, and information γ indicates that the frequency band of 2 to 40 Hz in the electrical signal received from the Doppler device is extracted by the filter circuit. In the case of information, the information α is “1”, and the information β is information indicating that the information is acquired from the antenna 122, and the information γ is 0 to 2 Hz in the electric signal received from the Doppler device by the filter circuit. When the information indicates that the frequency band has been extracted, the information α is “0” and the information β is acquired from the antenna 122. If the information α is “0” when the information γ is information indicating that the frequency band of 2 to 40 Hz in the electrical signal received from the Doppler device is extracted by the filter circuit. , The information θ is data E that “the moving body exists and is active in a fall state”.

  The recording unit included in the apparatus of the present invention is prepared by conducting experiments or the like in advance to create the above-described data in which the signal output from the rectifier including the specific frequency band information and the attitude of the moving body are associated with each other. Keep a record. The recording unit is specifically a hard disk, CD, FD, MO, or the like.

<Processing unit>
The apparatus of the present invention includes a processing unit that receives a signal output from the rectifying unit and determines the posture of the moving body using data recorded in the recording unit.
That is, the information α, information β, and information γ included in the signal output from the rectifying unit is received and recorded in the recording unit, for example, using data such as data A to E, Determine the posture of the moving object.
For example, the signal output from the rectifying means is information indicating that the information β is acquired from the antenna 121, and the information γ is a frequency band of 0 to 2 Hz in the electric signal received from the Doppler device by the filter circuit. Information α is “0” and information β is information obtained from the antenna 121, and information γ is an electric signal received from the Doppler device by the filter circuit. In the case of information indicating that the frequency band of 2 to 40 Hz is extracted, the information α is “0”, and the information β is information indicating that the information is acquired from the antenna 122. The information α is “0” when the information indicates that the frequency band of 0 to 2 Hz in the electrical signal received from the Doppler device is extracted. Yes, and information β is information indicating that it has been acquired from the antenna 122, and information γ is information indicating that the frequency band of 2 to 40 Hz in the electrical signal received from the Doppler device is extracted by the filter circuit If the information α is “0”, the data A is used to determine that the posture of the moving object is “no moving object”.

The apparatus of the present invention has the above-described configuration, and determines the posture of the moving body from moment to moment. And it is preferable to judge whether the judged attitude | position is a specific attitude | position and to issue a warning when it is a specific attitude | position.
For example, when the apparatus of the present invention is installed in a toilet or bathroom and used, the processing unit of the apparatus of the present invention has determined that “the moving body is present and is stationary in a fallen state”. In this case, it is preferable to provide a configuration for issuing an alarm such as a buzzer in order to promptly notify other persons (such as family members) who are outside the toilet or bathroom.

  In addition, when the apparatus of the present invention is installed in a closed space such as a bathroom and the movement of the moving body is detected, it is preferable to confirm the type of the moving body before entering the closed space. For example, when a dog enters the bathroom, the accuracy of detection of the movement of the moving body by the apparatus of the present invention decreases. Therefore, for example, the apparatus of the present invention is equipped with a machine for measuring the weight of the moving body before entering the bathroom, thereby confirming the type of the moving body to some extent and adding information such as the weight to the determination of the movement of the moving body. It is preferable.

<Example 1>
The apparatus of the present invention was installed in a toilet as shown in FIG. The apparatus of the present invention used here is the one shown in FIG. As a Doppler device, model number NJR4178J (10.5 GHz band) or model number NJR4261J (24 GHz band) manufactured by New Japan Radio Co., Ltd. was used.
Specifically, the antenna 121 is installed at a height that radiates radio waves near the knee when a person is standing, and the antenna 122 is a height that radiates radio waves near the chest when a person is standing. Is installed.
Each of the filter circuit 201a and the filter circuit 202a is composed of a low-pass filter that passes 40 Hz or less and a high-pass filter that passes 2 Hz or more and passes 2 to 40 Hz. The filter circuit 201b and the filter circuit 202b are both This is a low-pass filter that passes 2 Hz.
Further, the comparator means 301a, 301b, 302a, 302b are all the same as those described with reference to FIGS. 9A and 9B, and if the reference voltage is 1 V and is equal to or higher than the reference voltage, “ "1", if it is less than the reference voltage, "0" is output.
The rectifying unit 400 is the same as that described with reference to FIG. 9C, and the signal output from the comparator unit is “when the absolute value of the voltage is equal to or higher than the reference voltage” or “the reference voltage”. If it is included in the “predetermined set time” from when it is no longer, “1” is output, and if it is not included, “0” is output. Here, the set time was 2 seconds.

The data shown in FIG. 10 was recorded in the recording unit. In the table illustrated in FIG. 10, the antenna 121 is represented by “height (lower)”, and the antenna 122 is represented by “height (upper)”.
FIG. 10A is data indicating that “0” is obtained in any frequency band at any height, and in such a case, the attitude of the moving body is “no moving body”.
FIG. 10B shows “1” in any frequency band at any height. In such a case, the posture of the moving body is “the moving body exists and is active in the standing state. . ”.
FIG. 10C shows “1” at any height in the frequency band of 0 to 2 Hz, and “0” at any height in the frequency band of 2 to 40 Hz. The posture of the moving object is data indicating that the moving object exists and is stationary in a standing state.
FIG. 10D shows that “height (top)” is “0” in any frequency band, and “height (bottom)” is “1” in the frequency band of 0 to 2 Hz, and 2 to 40 Hz. It is “0” in the frequency band, and in such a case, the posture of the moving body is data indicating that the moving body is present and is stationary in a fallen state.
FIG. 10E shows that “height (top)” is “0” in any frequency band, and “height (bottom)” is “1” in any frequency band. In this case, the posture of the moving body is data indicating that the moving body exists and is active in a fall state.

Then, the processing unit 600 receives the signal 410 output from the rectifying unit 400 and determines the posture of the person 2 using the data recorded in the recording unit 500.
As a result of the determination, if the person 2 corresponds to “the moving body is present and is still in a fallen state”, the buzzer 700 issues an alarm.

  When such a device of the present invention was installed in a toilet and used, a buzzer sounded when a person was stationary in a state of falling in the toilet. The processing unit also accurately determined the postures of other people.

<Example 2>
The apparatus of the present invention was installed in a bathroom as shown in FIG. The apparatus of the present invention used here is the same as that of the first embodiment.
When the apparatus of the present invention was installed and used in a bathroom, a buzzer sounded when a person was stationary in a state of falling in the bathroom. The processing unit also accurately determined the postures of other people.

<Example 3>
The apparatus of the present invention was installed indoors as shown in FIG. The apparatus of the present invention used here is the same as that used in Example 1, except for the data recorded in the recording unit.
The data recorded in the recording unit is as shown in FIG.
In the table shown in FIG. 11, the antenna 121 is indicated by “height (lower)” and the antenna 122 is indicated by “height (upper)”.
FIG. 11A is data indicating that “0” is present in any frequency band at any height, and in such a case, the posture of the moving body is “no moving body”.
FIG. 11B shows “1” in any frequency band at any height. In such a case, the posture of the moving object is “the moving object exists and is walking”. It is.
FIG. 11C shows “1” at any height in the frequency band of 0 to 2 Hz, and “0” at any height in the frequency band of 2 to 40 Hz. The posture of the moving body is data indicating that the moving body is present and the mobile walking is stopped.
In FIG. 11D, “height (top)” is “0” in any frequency band, and “height (bottom)” is “1” in the frequency band of 0 to 2 Hz, and 2 to 40 Hz. It is “0” in the frequency band, and in such a case, the posture of the moving body is data indicating that the moving body is present and is in a fallen or sitting state.

  When such an apparatus of the present invention was installed in a room and used, a buzzer sounded when a person was standing still in a room while falling down. The processing unit also accurately determined the postures of other people.

10 Device of the present invention 20, 20 ′ Reference voltage 100 Doppler device 121, 122, 123 Antenna 101a, 102a Transmitted wave 101b, 102b Received wave 111, 112, 113 Electric signal 150 Switcher 201a, 202a, 201b, 202b, 250 Filter Circuit 211a, 211b Electric signal 205a, 205b, 205c Amplifier 301a, 301b, 302a, 302b Comparator means 311a, 311b, 312a, 312b Signal 400 Rectifier means 410 Signal

Claims (3)

A Doppler device that emits a transmission wave that is a radio wave or a sound wave to a moving body, receives a reflected wave, and outputs a frequency difference between the transmitted wave and the reflected wave as an electrical signal;
Two or more filter circuits comprising at least one selected from the group consisting of a low-pass filter, a high-pass filter, and a band-pass filter, and extracting two or more specific frequency bands in the electrical signal received from the Doppler device;
It is determined whether or not the absolute value of the voltage is greater than or equal to a reference voltage in each of the two or more specific frequency band electrical signals taken out by passing through the two or more filter circuits, and the determination result is Comparator means for outputting as a signal;
Using the signal output from the comparator means, in each of the specific frequency bands, included in a preset time from when the absolute value of the voltage is equal to or higher than a reference voltage or when it is no longer equal to or higher than the reference voltage Rectifying means for outputting a signal including information of the specific frequency band, which distinguishes between the time when the signal is generated and the other time;
A recording unit that records data associating the signal output from the rectifier and the posture of the moving body;
A moving body position detecting apparatus, comprising: a processing unit that receives a signal output from the rectifying unit and determines the posture of the moving body using data recorded in the recording unit. The Doppler device radiates the transmission wave at two or more heights in the vertical direction and outputs the electrical signal at each height,
The filter circuit extracts the specific frequency band in the electrical signal at each height,
The comparator means outputs the determination result as a signal in the electrical signal at each height,
The rectifying means outputs a signal including information of the specific frequency band at each height,
The moving body posture detection apparatus according to claim 1, wherein the recording unit records data in which the signal output from the rectifying unit and the posture of the moving body are associated with each other at each height. The mobile body position detection apparatus according to claim 1, further comprising: determining whether the determined posture is a specific posture and issuing an alarm if the determined posture is the specific posture.