JP3187112U - Biological monitoring device - Google Patents

Abstract

Provided is a living body monitor apparatus which can be attached to various living bodies with a simpler apparatus configuration and which can observe and continuously record data in a desired frequency range.
An acoustic sensor 1 for converting sound generated inside a living body into a voltage to be converted into an acoustic signal, an amplifier device 2 for amplifying the acoustic signal from the acoustic sensor, and an acoustic signal amplified by the amplifier device The sound sensor 1 has a film-like piezo element, the amplifier device 2 supplies power to each circuit, and the sound sensor 1. The processing circuit 21 for amplifying the acoustic signal converted into the voltage in Step 1, the control circuit 22 for converting the acoustic signal amplified by the processing circuit into an acoustic signal in a specific frequency range by the filter circuit, and the amplification by the processing circuit The control circuit is configured by an output circuit 23 for outputting an acoustic signal having a specific frequency range to the observation apparatus.
[Selection] Figure 1

Description

  The present invention relates to a biological monitor device.

  Conventionally, a stethoscope is generally used as an instrument for observing a living body from the outside. This stethoscope is a medical device that was invented in the early 19th century, and can be directly heard by amplifying sounds in the audible range such as heart sounds and blood flow sounds generated inside the living body by touching the skin surface of the living body. Is.

  In recent years, an electronic auscultation system has been proposed in which sound from a stethoscope is connected to a computer via a digital converter or the like and recorded as data using the computer (see, for example, Patent Document 1).

  This electronic auscultation system consists of a set of a signal digital conversion device and a computer for digitizing the sound range that can be heard with a conventional stethoscope, and has a problem that the device configuration is complicated, so it is widely used. It hasn't been done yet.

  For this reason, there has been a strong demand for the development of a biological monitor device that has a simple device configuration and that can be used in various states by the sensor unit.

JP 2009-273817 A

  The present invention eliminates the conventional problems from the background as described above, can be attached to various living bodies with a simpler device configuration, and can observe data in a desired frequency range or continuously. It is an object of the present invention to provide a living body monitor device capable of accurate recording.

  That is, the biological monitor device of the present invention is characterized by the following.

  First, a sound sensor for converting sound generated inside a living body into a voltage and generating an acoustic signal, an amplifier device for amplifying the sound signal from the sound sensor, and a sound signal amplified by the amplifier device as sound Or an observation device for outputting an image, wherein the sound sensor has a film-like piezo element, and the amplifier device converts power into a voltage by the power sensor circuit that supplies power to each circuit and the sound sensor. A processing circuit for amplifying the generated acoustic signal; a control circuit for converting the acoustic signal amplified by the processing circuit into an acoustic signal in a specific frequency range by a filter circuit; It is characterized by comprising an output circuit for outputting an acoustic signal having a specific frequency range in the circuit to the observation device.

  Secondly, in the living body monitor device according to the first aspect of the invention, it is preferable that a rubber member or a gel is held on the surface of the film-like piezoelectric element of the sound sensor.

  Thirdly, in the living body monitoring device according to the first or second device, the film-shaped piezo element of the sound sensor has a shape that can be attached to a wrist, and the sound sensor is wound around the wrist and is generated in the living body. It is preferable to convert sound to be converted into voltage.

  Fourth, in the living body monitor device of the first or second device, the film-shaped piezoelectric element of the sound sensor is a rectangle of 0.5 to 30 cm × 0.5 to 30 cm, and the sound sensor is a surface of the body. It is preferable to convert the sound generated in the living body by sticking it to the voltage.

  Fifth, in the living body monitor device of the first or second invention, a film-shaped piezoelectric element of the sound sensor is formed into a circular shape of φ0.5 cm to φ30 cm, and the sound sensor is attached to the surface of the body. It is preferable to convert sound generated in the body into voltage.

  Sixth, in the biological monitor device of the first or second invention, the film-shaped piezo element of the sound sensor has a rectangular shape of 1 to 100 cm × 1 to 100 cm, and the sound sensor is embedded in bedding or It is preferable that the sound generated in the living body is converted into voltage.

  Seventhly, in the living body monitoring device according to the first to sixth inventions, the observation device is preferably a speaker, a personal computer, or a portable terminal device.

  Eighth, in the living body monitor device according to the first to seventh inventions, it is preferable that the connection between the amplifier device and the observation device is a wired connection or a wireless connection.

  According to the present invention, it is possible to provide a living body monitoring apparatus that can be attached to various living bodies with a simpler apparatus configuration and that can observe and continuously record data in a desired frequency range. Can do.

It is a block diagram which shows the structure of the biological monitor apparatus of this invention. It is a schematic sectional drawing which shows the structure of the sound sensor used with the biological monitor apparatus of this invention. It is the schematic which shows the state which performed the fast Fourier-transform process using frequency analysis software.

  As shown in the block diagram of FIG. 1, the living body monitor device of the present invention includes an audio sensor 1, an amplifier device 2, and an observation device 3.

  As shown in FIGS. 2A and 2B, the audio sensor 1 is an audio sensor 1 having a film-like piezo element 10 as a main component. The film-like piezo element 10 is housed in a package 12 via a vibration isolating member 13 and is designed so as not to pick up external noise as much as possible.

  The film-shaped piezo element 10 has superior flexibility, impact resistance, voltage resistance, water resistance, chemical resistance, and the like as compared with a piezo element using a conventional ceramic. It can set suitably according to the use of a measurement.

  The film-like piezo element 10 has a flat shape, and it is possible to detect heart sounds and the like by directly contacting the surface of the piezo element 10 with the epidermis such as the chest of the measurer. The configuration of the embodiment shown in FIG. Then, the silicon rubber 11 in contact with the outer skin is provided on the surface of the film-like piezoelectric element 10.

  This silicone rubber 11 has the same degree of softness as the outer skin, and since the acoustic impedance is close to that of a living body, by providing this silicone rubber 11, the adhesion with the outer skin is improved, Accurate detection with reduced noise becomes possible.

  In addition to using silicon rubber 11, it is possible to improve the adhesion by filling the gap with the outer skin using oil or gel that has similar acoustic impedance to that of the living body, and more accurate detection with less noise is possible. It becomes.

  Sound vibrations such as heart sounds detected through the silicon rubber 11 are converted into voltage by the film-like piezo element 10 and output to the amplifier device 2 described later as an analog signal of an acoustic signal through the cable 14. Note that by providing the conversion device 15 (conversion substrate), it is possible to provide a part of the functions of the amplifier device such as impedance conversion and amplification.

  Further, by adopting a configuration in which only the contact surface is exposed to the outside as shown in FIG. 2A, noise can be further reduced, and a fine signal can be obtained. In addition, in the configuration as shown in FIG. 2B, by allowing the contact portion to be separated from the case, arbitrary deformation such as winding around the object is possible.

  In the configuration of the embodiment illustrated in FIG. 1, the amplifier device 2 includes a power supply circuit 20, a processing circuit 21, a control circuit 22, and an output circuit 23. Note that the amplifier device 2 may be an analog amplifier device that amplifies the analog signal from the sound sensor 1 as it is, or a digital amplifier device that converts the signal into a digital signal and performs processing.

  The acoustic signal detected by the sound sensor 1 is first introduced into the processing circuit 21 of the amplifier device 2.

  The processing circuit 21 has a function of amplifying the introduced acoustic signal and cutting noise by the filter circuit. The noise to be cut here is for cutting noise in a frequency band that is not the object of measurement. For example, a low-pass filter (LPF) that cuts a high frequency range in order to clarify a low frequency range that is important as data. And the like.

  The acoustic signal amplified by the processing circuit 21 and from which noise has been cut is introduced into the control circuit 22. The control circuit 22 has mode switching means for extracting only a specific frequency band of the acoustic signal. As such a mode switching means, for example, a mode having a filter circuit for cutting a frequency band other than a frequency band corresponding to a heart sound, a frequency band corresponding to a blood flow sound, a frequency band corresponding to a breathing sound, etc. Switching means are considered. Specifically, it is possible to select three types of sound ranges, a low sound range, a high sound range, and a wide sound range. It is also possible to set a mode for outputting an original acoustic signal that does not cut noise.

  The acoustic signal of the mode selected by the control circuit 22 is introduced into the output circuit. The output circuit 22 has a volume for adjusting the volume, and has an output terminal for wired connection to the observation apparatus 3 to be described later, as well as a circuit for wireless LAN and short-range wireless for wirelessly transmitting and outputting data. It is possible to connect these devices.

  The acoustic signal amplified and adjusted by the amplifier device 2 is output from the output circuit 23 to the observation device 3.

  Note that each of the above circuits constituting the amplifier device 2 is operated by electricity supplied from the power supply circuit 20. As a power source, a known power source having a specific voltage from a dry battery or a storage battery, or a power source stabilized by converting an alternating current of a general household power source into a direct current can be used. In the power supply circuit 20, the current from these power supplies is supplied as a current having a stabilized appropriate voltage necessary for operating each circuit.

  As the observation device 3 for inputting the acoustic signal that has been amplified and adjusted by the amplifier device 2, the input acoustic signal can be used as sound or an image and can be recorded as data. You can connect without restrictions. Examples of the observation device 3 include a speaker such as a headphone, a personal computer, a mobile terminal device such as a tablet terminal device, and a mobile phone.

  For example, when an output acoustic signal is connected to a personal computer as an analog signal, it is connected to an audio input terminal of the personal computer. Then, it can be output as sound from a speaker of a personal computer, or the waveform can be visually recognized as an image by using waveform display software or frequency analysis software installed in the personal computer in advance.

  When frequency analysis software is used, fast Fourier transform (FFT) processing is performed as shown in FIG. 3, the input acoustic signal is analyzed for each frequency, and only the waveform in the frequency band of the required level is analyzed. By taking out, it becomes possible to perform highly accurate waveform analysis. In addition, the analysis data can be continuously observed, and the data can be stored in an HDD, a memory card, or the like.

  In the living body monitor device of the present invention, for example, in the above embodiment, the sound sensor 1 has been described as a stethoscope type. However, the film-like piezoelectric element 10 constituting the sound sensor 1 can be wound around the wrist. As a form of a wristband, it is used by wrapping around the wrist, a rectangle of 0.5 to 30 cm × 0.5 to 30 cm, preferably 0.5 to 10 cm × 0.5 to 10 cm, and φ0.5 cm to It can also be used by sticking to the chest or the like in the form of a circular sheet of φ30 cm, preferably φ0.5 cm to φ10 cm. The film shape can be arbitrarily changed, and can be used as a shape such as an ellipse or a polygon in addition to the rectangle or the circle.

  Further, for example, the film-like piezo element 10 and the silicon rubber 11 have a rectangular wide area of 1 to 100 cm × 1 to 100 cm, and the film can be moved to bedding such as a bed as shown in FIG. It is possible to embed or lay under or on a sheet to observe data in a desired frequency range or to continuously record data for a long time while lying down.

  The acoustic signal output from the amplifier device 2 can be transmitted via a wireless LAN and can be received at a remote location via a telephone line.

  According to such a living body monitor device of the present invention, it is possible to attach to various living bodies with a simpler device configuration, and observation of data in a desired frequency range and continuous recording for a long time are possible. It can be set as a biological monitor apparatus.

DESCRIPTION OF SYMBOLS 1 Auditory sensor 10 Film-shaped piezo element 11 Silicon rubber 12 Package 13 Anti-vibration member 14 Cable 15 Converter 2 Amplifier apparatus 20 Power supply circuit 21 Processing circuit 22 Control circuit 23 Output circuit 3 Observation apparatus

Claims (8)

An acoustic sensor for converting sound generated inside the living body into voltage and making it an acoustic signal;
An amplifier device for amplifying the acoustic signal from the acoustic sensor;
It has an observation device for outputting the sound signal amplified by the amplifier device as sound or image,
The sound sensor has a film-like piezo element,
A power supply circuit for supplying power to each circuit;
A processing circuit for amplifying an acoustic signal converted into a voltage by the sound sensor;
A control circuit for converting the acoustic signal amplified by the processing circuit into an acoustic signal in a specific frequency range by a filter circuit;
A biological monitor apparatus comprising an output circuit for outputting an acoustic signal amplified by the processing circuit and having a specific frequency range by the control circuit to the observation apparatus.   The living body monitor apparatus according to claim 1, wherein a rubber member or a gel is held on the surface of the film-like piezoelectric element of the sound sensor.   The film-shaped piezo element of the sound sensor has a shape that can be worn on a wrist, and the sound sensor is wound around the wrist to convert sound generated in a living body into a voltage. The biological monitor device described.   The film-like piezo element of the sound sensor has a rectangular shape of 0.5 to 30 cm × 0.5 to 30 cm, and the sound sensor is attached to the surface of the body to convert sound generated in the living body into voltage. The living body monitor apparatus according to claim 1 or 2, characterized in that   2. The film-shaped piezoelectric element of the sound sensor is formed in a circular shape of φ0.5 cm to φ30 cm, and the sound sensor is attached to the surface of a body to convert sound generated in the living body into voltage. Or the biological monitor apparatus of 2.   The film-shaped piezo element of the sound sensor has a rectangular shape of 1 to 100 cm × 1 to 100 cm, and the sound sensor is embedded in bedding or laid on the bedding to convert sound generated in the living body into voltage. The living body monitor apparatus according to claim 1 or 2.   The biological monitoring apparatus according to claim 1, wherein the observation apparatus is a speaker, a personal computer, or a mobile terminal device. The biological monitor device according to any one of claims 1 to 7, wherein the connection between the amplifier device and the observation device is a wired connection or a wireless connection.