JP2015144796A - Human body detection by microwave doppler sensor and biological monitoring method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for minimizing current consumption for operating a microwave Doppler sensor and reliably detecting and monitoring a human body and breath.SOLUTION: In a device for detecting a human body in a living space by using a microwave Doppler sensor, and detecting body motion and breath of the human body to monitor biological information, when the device is turned on to wait for the existence/absence of a human body to be detected, the microwave Doppler sensor transmits a microwave as pulse modulation at intervals to monitor the existence/absence of a human body with low current consumption, and when the human body is not detected again within a fixed time after detecting the human body, the microwave transmitted from the microwave Doppler sensor is switched from the pulse modulation to a non-modulation continuous wave and is continuously transmitted to monitor body motion and breath of a human body further specifically.

Description

  The present invention relates to a method for detecting and monitoring a human body and respiration with a microwave Doppler sensor, and more particularly to a method for constantly detecting a human body with low current consumption and monitoring body movement and respiration.

  In recent years, deaths of middle-aged and elderly people in bathrooms and toilets are increasing. Many of the causes are cardiovascular diseases such as myocardial infarction, and cerebrovascular diseases such as intracerebral hemorrhage and subarachnoid hemorrhage. Bathrooms and toilets often have a temperature difference from the living room, etc.When moving from a warm living room to a cold bathroom or toilet, the body is exposed to sudden temperature changes, blood pressure changes suddenly, cardiovascular diseases, May cause cerebrovascular disease. In addition, there may be disturbance of consciousness due to a drop in blood pressure during bathing, or falling asleep and drowning. When living with a family, the family often goes to see the situation because it does not come out of the bathroom or toilet indefinitely, or it is quiet and quiet without any noise for a long time. In many cases, the lifespan is saved and at the same time, the aftereffects are not left or light, but if they are discovered over time, they often die or have severe aftereffects. . In the case of accommodations such as business hotels, even if a change occurs due to the reasons mentioned above, the hotel will not be noticed until the next morning check-out, and will not appear at the reception even if the check-out time is too long This is the first time you notice an incident. In such a case, it is often the case that the person has already died, and a lot of damage is caused to the accommodation facility such that the room cannot be used for a while due to various processes and measures. In addition, the solitary deaths of older people living alone are increasing, which is also a social problem, and they die without being noticed by the lack of contact with society, and are discovered only after considerable time. There are many cases.

  In order to prevent such an accident, various systems have been invented for monitoring biological information using a microwave Doppler sensor. The microwave Doppler sensor sends microwaves toward the space to receive reflected waves from the human body. When the human body is moving, the Doppler effect causes a difference in the frequency of the transmitted wave and the received wave. By obtaining the difference, the body movement and respiratory state of the human body can be detected.

  For example, the human body detection apparatus using microwaves disclosed in Japanese Patent Application Laid-Open No. 2002-71825 (Patent Document 1) is the presence of a human body by installing microwave sensors in residential equipment such as a system kitchen, a wash basin, a toilet, a bath, and a shower. It detects biological information such as breathing and heartbeat.

  In addition, the safety monitoring device disclosed in Japanese Patent Application Laid-Open No. 2012-75861 (Patent Document 2) detects daily living conditions and abnormal health conditions of a person who lives alone such as an elderly person living alone. This is a safety monitoring device that monitors the physical condition, calculates the number of body movements and respiration rate using the microwave Doppler shift signal output from the microwave Doppler sensor, and examines the subject from the safety pattern that is a combination of these two. By monitoring the safety of the patient, it becomes possible to determine the safety in a situation that does not involve a large body movement and to detect the state of the subject. According to claim 6 of the document, the microwave Doppler sensor and the body movement respiration detection unit are formed as a sensor unit, and the safety pattern determination unit and the safety notification unit are the sensor unit. Provided in a separate server, the sensor unit and the server are connected by a wired or wireless communication line and can make a safety confirmation message or make a call.

  JP 2002-71825 A   JP 2012-75861 A

  The microwave-based human body detection device disclosed in Patent Document 1 uses the characteristics of a microwave Doppler sensor to constantly transmit microwaves to detect biological information such as the presence of a human body, breathing, and heartbeat. Simply embed microwave Doppler sensors into system equipment such as system kitchens, washstands, toilets, baths, and showers, and use biological Doppler sensors to detect biological information in daily life situations. A general technique for detecting information is shown.

  Similar to Patent Document 1, the safety monitoring device disclosed in Patent Document 2 constantly transmits and irradiates the subject with microwaves in the basic configuration, and the test wave is reflected from the Doppler-shifted reflected waves. Detecting biological information such as breathing and heartbeat using a microwave Doppler sensor that detects a person's body movement and respiration and monitors the subject's safety from the number of body movements and respiration rate within a predetermined time In addition, it is a general technique that a safety confirmation message and a telephone call can be performed on a wired or wireless communication line.

  By the way, in both of the above-mentioned Patent Documents 1 and 2, a power source is necessary to operate the apparatus, but there is no particular description how to obtain the power source. In such a device, it is necessary to constantly transmit a microwave in order to detect biological information of the human body, and power is always supplied to the device (24 hours 365 days). As a means for supplying power to the apparatus, a method is generally used in which power is obtained from an AC (alternating current) power drawn to the installation site and converted into DC (direct current) or the like as appropriate by a power circuit inside the apparatus. In the case of obtaining power from an AC (alternating current) power supply, special care is required particularly in the installation of a device in a bathroom where there are many cases of cardiovascular / cerebral vascular diseases or deaths. In the bathroom, there is a lot of moisture, such as splashes from showers, temperature differences from steam or outside air, and moisture, so there is a risk of electric leakage and electric shocks. Necessary and high installation cost. In addition, it is necessary to always supply power (24 hours 365 days) in order to operate the apparatus, and although the current consumption is not so large, it is necessary to consider the burden of electricity cost accordingly.

  Moreover, although it can be easily assumed that a battery such as a primary battery (dry battery) or a secondary battery (rechargeable battery) is used as a power source, in the configurations as described in Patent Documents 1 and 2, microwaves are always transmitted. The current consumption is large. Therefore, when a battery is used, it is assumed that the battery will run out in a short time and the frequency of replacement and charging will increase. In Patent Documents 1 and 2, there is no purpose or explanation for well reducing current consumption for the operation of the apparatus.

  Therefore, in order to solve the above problems, the present invention makes it possible to use a battery as a power source of the apparatus while minimizing the current consumption for the operation of the microwave Doppler sensor. An object of the present invention is to provide a method that can be easily performed by itself and that reliably detects and monitors the human body and respiration.

  According to a first aspect of the present invention, there is provided an apparatus for detecting a human body in a living space using a microwave Doppler sensor, detecting body movement and breathing of the human body, and monitoring biological information. When waiting for detecting the presence or absence of a human body when it is on, microwaves are sent from the microwave Doppler sensor at intervals as pulse modulation to monitor the presence or absence of the human body with low current consumption, and after the detection of the human body When the human body is not detected again within the time, the microwave transmitted from the microwave Doppler sensor is switched from pulse modulation to unmodulated continuous wave and continuously transmitted, and the human body motion and breathing are further detailed. It is solved by monitoring.

According to a second aspect of the present invention, there is provided an apparatus for detecting a human body in a living space using a microwave Doppler sensor, detecting body movement and respiration of the human body, and monitoring biological information.
(A) When the apparatus is on standby for detecting the presence or absence of a human body when the power is turned on, the microwave Doppler sensor is sent at intervals as pulse modulation to monitor the presence or absence of a human body with low current consumption And
(B) When the microwaves transmitted at intervals by the pulse modulation detect a human body more than a predetermined number of times within a predetermined time, it is determined that there is a human body,
(C) After determining that there is a human body, when the microwaves transmitted at intervals by the pulse modulation do not detect the human body again within a predetermined time, the microwaves transmitted from the microwave Doppler sensor are pulse-modulated. To monitor the movement and breathing of the human body in more detail by switching from unmodulated continuous wave and continuously sending
(D) By switching the microwave to an unmodulated continuous wave and continuously transmitting it, the body motion and respiration of the human body are monitored in more detail, and if no body motion and respiration are detected, it is determined that there is no human body Then, the microwave sent from the microwave Doppler sensor is switched from unmodulated continuous wave to pulse modulation and sent back at an interval to return to the standby state to monitor the human body with low current consumption,
(E) On the other hand, when the body motion and respiration are detected in more detail by monitoring the body motion and respiration of the human body by switching the microwave to the unmodulated continuous wave and continuously sending it, , Continue to monitor the body movement and breathing of the human body in detail by continuously sending out the unmodulated continuous wave by judging that there is a human body and no abnormality,
(F) When the detection of the human body motion and respiration disappears during the detailed monitoring of the human body motion and respiration in (e), it is determined that there is no human body and is sent from the microwave Doppler sensor. Switch from unmodulated continuous wave to pulse modulation and send back at intervals to return to the standby state to monitor the human body with low current consumption,
(G) On the other hand, when the detection of body motion disappears and only breathing is detected while monitoring the body motion and respiration of the human body in detail on the other hand (e), it is determined that there is an abnormality in the human body,
(H) sending an alarm signal by the short-range wireless communication means provided in the device to report an abnormal situation to the outside;
This can be solved by performing the steps (a) to (h) in this order.

  In a device that detects a human body in a living space using a microwave Doppler sensor and monitors biological information by detecting body movement and breathing of the human body, when the device is in a standby state to detect the presence or absence of a human body when the power is turned on The microwave Doppler sensor is used to monitor the presence or absence of the human body with low current consumption by sending microwaves at intervals as pulse modulation, and when the human body is not detected again within a certain time after the detection of the human body, The microwave transmitted from the microwave Doppler sensor is switched from pulse modulated to unmodulated continuous wave and continuously transmitted to monitor the body movement and breathing of the human body in more detail. If you fall into a state where you have no breathing, that is, you have fallen asleep or lost consciousness, you will be notified of an abnormal situation to the outside, and rescue and lifesaving measures will be taken early It is possible to reduce the rate at which leaves the death or severe sequelae in the. In addition, when the apparatus is on standby, the microwaves sent from the microwave Doppler sensor are sent as pulse modulation at intervals, so that the current consumption can be extremely reduced. As a result, even if the power supply of the device is battery-powered and is always on, it can be driven for a long period of about six months to one year. And can be installed easily by general users.

It is a block diagram of the respiration detection and biological monitoring method by a microwave Doppler sensor. It is a wave form diagram of pulse modulation of the microwave transmitted at the time of standby. It is a wave form diagram of the pulse modulation of a microwave when a human body is detected temporarily at the time of standby. It is a wave form diagram which shows the state of a microwave when a human body is detected. It is a wave form diagram which shows the state of a microwave when a human body is detected. It is a wave form diagram which shows the state of a microwave when a human body is detected. It is the figure which showed an example of the external appearance of a main body.

BEST MODE FOR CARRYING OUT THE INVENTION

  A first embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of a respiratory detection and biological monitoring method using a microwave Doppler sensor. The main body (1) includes a Doppler module (2) and a control circuit (3). The Doppler module (2) includes a microwave circuit including a microwave transmission / reception circuit of 10.525 GHz and a transmission path disposed on a substrate. The control circuit (3) is composed of an amplifier circuit (3a), a digital signal processor (3b), and a low-pass filter (3c). The control circuit (3) detects the human body detected by the Doppler module (2) and its body movement (body movement) and breathing. Monitor and monitor a predetermined detection pattern of body movement and respiration. In the present invention, the control circuit (3) is an example of a circuit for monitoring a human body detected by the Doppler module (2) and its body movement and respiration, and monitoring a predetermined body movement and respiration detection pattern. The circuit configuration is not particularly limited, and other circuit configurations may be used.

  The present invention is characterized in that the microwave transmission waveform transmitted from the Doppler module (2) is switched between a standby time for detecting the presence or absence of a human body and a human body detection at the standby time. Note that the standby state refers to a state in which the presence or absence of a human body is monitored in a state where the power source of the main body (1) is on and operating. In the following description, it is assumed that the main body (1) is attached to the bathroom.

  FIG. 2 is a waveform diagram of a standby microwave transmitted from the Doppler module (2), and shows that a microwave is transmitted at intervals of 10 pulses every 10 seconds. In FIG. 2, the pulse modulation is set to be sent out once every 10 seconds. However, the important thing is that the pulse modulation is sent at intervals. There is no particular limitation as to whether it is sent out once or once every 8 seconds, and an appropriate interval that does not hinder the detection of the presence or absence of a human body may be used. In this way, by sending microwaves at intervals by pulse modulation during standby, it is possible to monitor the presence or absence of a human body with a very small current consumption.

The behavior when a person enters a bathroom generally applies to the following pattern.
(1) When you leave the bathroom, such as taking something, looking at the hot water, washing the bathtub, etc.
(2) When taking a bath such as taking a shower in the bathroom or using it in a bathtub.

  FIG. 3 is a waveform diagram of a microwave when a human body is temporarily detected during monitoring of the presence or absence of the human body during standby. During standby, the human body is detected twice during about 2 minutes of the pulse-modulated microwave that is sent at intervals of 10 seconds. However, since there is no detection after that, the microwave is continuously pulsed. This is a state in which the presence or absence of a human body is monitored by sending out by modulation. The waveform diagram as shown in Fig. 3 applies to the behavior pattern when exiting immediately after entering the bathroom, such as taking in something of (1), watching hot water, washing the bathtub, etc. Is shown. First, at the time of standby for monitoring the presence / absence of a human body, the presence / absence of a human body is monitored with a very small current consumption by transmitting a microwave by pulse modulation. When waiting for detecting only the presence or absence of a human body, it is not necessary to continuously send out a microwave with an unmodulated continuous wave that can monitor the movement and breathing of the human body in detail and consume a wasteful current.

  FIG. 4 is a waveform diagram showing the state of the microwave when a human body is detected. The state of FIG. 4 will be described in detail. The human body is detected five times in about 3 minutes of the pulse-modulated microwave that is sent at intervals of 10 seconds during standby, but first of all, it is detected that the human body is detected several times intermittently. judge. Since the human body was not detected again within a fixed time (about 2 minutes in FIG. 4), the microwave transmitted from the microwave Doppler sensor was continuously switched from pulse modulation to unmodulated continuous wave. Send out and monitor body movement and breathing in more detail. As a result, since no human body movement or respiration was detected, it was determined that there was no human body, and the microwave was switched again to pulse modulation with low current consumption and sent back to indicate that the human body was returned to standby mode. Is. In this case, the behavior pattern when exiting immediately after entering the bathroom such as taking in something of the above (1), watching hot water, washing the bathtub, etc. is applied and shows the state. In the waveform diagram of FIG. 4, even when a sudden death occurs after detection of a human body, it is represented as the same waveform diagram and it is determined that there is no human body. However, in the present invention, it is aimed at reducing the rate of death or severe sequelae by giving rescue and lifesaving early, so if you suddenly die, you will not be treated and you dare to die The determination of was omitted.

  FIG. 5 is a waveform diagram showing the state of the microwave when a human body is detected. The state of FIG. 5 will be described in detail. The human body is detected five times in about 3 minutes of the pulse-modulated microwave that is sent at intervals of 10 seconds during standby, but first of all, it is detected that the human body is detected several times intermittently. judge. Since the human body was not detected again within a certain time (about 2 minutes in FIG. 5), the microwave transmitted from the microwave Doppler sensor was continuously switched from pulse modulation to unmodulated continuous wave. Send out and monitor body movement and breathing in more detail. As a result, since the human body motion and respiration are detected at the same time, it is determined that there is a human body and that there is no abnormality in the human body. After that, the body motion and breathing are no longer detected, so it is determined that the human body is no longer present, and the microwave is switched to pulse modulation with low current consumption and sent back to monitor the presence or absence of the human body. Is shown. In such a case, the behavior pattern when taking a bath such as taking a shower in the bathroom (2) or taking a bath or the like is applied and shows the state. First, the presence of a human body is detected by an operation such as washing the body bathed in hot water and entering the bathroom by pulse modulation. Specifically, it is determined that there is a human body when body motion is detected several times (five times in the figure) in about 3 minutes. The body movement disappears when immersed in the bathtub and calms down to some extent, and when there is a blank time during which the body movement is not detected by pulse modulation, the microwave transmission is switched from pulse modulation to unmodulated continuous wave in detail. And monitor breathing. If body movement and respiration are detected at this time, it is determined that there is no abnormality since the human body is normally in the bathtub. The human body being monitored during this period continues to determine that the human body is normal because body movement and breathing are detected by washing the body out of the bathtub and washing the body. When a series of baths are completed and the body leaves the bathroom and body movement and breathing are no longer detected, it is determined that the human body has left the bathroom. Switch back to pulse modulation of current and return to standby mode to monitor the presence or absence of a human body.

  FIG. 6 is a waveform diagram showing the state of the microwave when a human body is detected. The state of FIG. 6 will be described in detail. The human body is detected five times in about 3 minutes of the pulse-modulated microwave that is sent at intervals of 10 seconds during standby, but first of all, it is detected that the human body is detected several times intermittently. judge. Since the human body was not detected again within a certain time (about 1 minute in FIG. 6), the microwave transmitted from the microwave Doppler sensor is continuously transmitted by switching from pulse modulation to unmodulated continuous wave. In addition, the movement and breathing of the human body are monitored in more detail. As a result, since body motion and respiration were detected at the same time, it was determined that there was a human body and there was no abnormality, but no body motion was detected on the way. This indicates a state in which it is determined that there is an abnormality in the human body and an abnormal situation is reported to the outside from the short-range wireless communication unit (5). Although not shown in the figure, when an abnormal human body is rescued, and both the body movement and respiration are no longer detected due to exit from the bathroom, it is determined that the human body is no longer present. The transmission waveform is switched from an unmodulated continuous wave to a pulse modulation with a low current consumption, and then returned to a standby state for monitoring the presence or absence of a human body. Such a case means that during actual bathing, the patient fell asleep in the bathtub and lost body movement, or fainted by some change and lost body movement. In such a state, although body movement is lost, but breathing continues, it is determined that there is an abnormality in the human body when only body movement disappears, and the abnormal situation is reported to the outside and rescue and lifesaving treatment are performed early Can reduce the rate of death or severe sequelae. In addition, even when the user simply falls asleep in the bathtub, the risk of drowning can be avoided because a third party can speak and wake up by reporting.

FIGS. 2 to 6 described above show that the processes are performed in the following order (a) to (h).
(A) When the apparatus is on standby for detecting the presence or absence of a human body when the power is turned on, the microwave Doppler sensor is sent at intervals as pulse modulation to monitor the presence or absence of a human body with low current consumption And
(B) When the microwaves transmitted at intervals by the pulse modulation detect a human body more than a predetermined number of times within a predetermined time, it is determined that there is a human body,
(C) After determining that there is a human body, when the microwaves transmitted at intervals by the pulse modulation do not detect the human body again within a predetermined time, the microwaves transmitted from the microwave Doppler sensor are pulse-modulated. To monitor the movement and breathing of the human body in more detail by switching from unmodulated continuous wave and continuously sending
(D) By switching the microwave to an unmodulated continuous wave and continuously transmitting it, the body motion and respiration of the human body are monitored in more detail, and if no body motion and respiration are detected, it is determined that there is no human body Then, the microwave sent from the microwave Doppler sensor is switched from unmodulated continuous wave to pulse modulation and sent back at an interval to return to the standby state to monitor the human body with low current consumption,
(E) On the other hand, when the body motion and respiration are detected in more detail by monitoring the body motion and respiration of the human body by switching the microwave to the unmodulated continuous wave and continuously sending it, , Continue to monitor the body movement and breathing of the human body in detail by continuously sending out the unmodulated continuous wave by judging that there is a human body and no abnormality,
(F) When the detection of the human body motion and respiration disappears during the detailed monitoring of the human body motion and respiration in (e), it is determined that there is no human body and is sent from the microwave Doppler sensor. Switch from unmodulated continuous wave to pulse modulation and send back at intervals to return to the standby state to monitor the human body with low current consumption,
(G) On the other hand, when the detection of body motion disappears and only breathing is detected while monitoring the body motion and respiration of the human body in detail on the other hand (e), it is determined that the human body is abnormal,
(H) An alarm signal is transmitted by the short-range wireless communication means provided in the apparatus to notify the outside of an abnormal situation.

  FIG. 7 is a diagram showing an example of the appearance of the main body (1). Made of ABS and other plastics, it is waterproofed for use in bathrooms with a lot of moisture, and the power supply is battery-powered to eliminate the risk of electric shock and leakage, and can be easily installed by the user. it can. In addition, if it is assumed to be used outside the bathroom, a dual power supply system can be used by providing a power input socket for the AC adapter at an appropriate position such as the bottom surface and providing a waterproof rubber stopper. Moreover, monitor LED (6) represents the power supply on-off and operation | movement condition of a main body (1). When the emergency switch (7) is depressed, the emergency switch (7) may report an abnormal situation to the outside from the short-range wireless communication unit (5) (for example, Bluetooth (registered trademark)) provided in the main body (1). Note that the short-range wireless communication unit (5) is not particularly limited in addition to Bluetooth (registered trademark), such as PLC system, wireless LAN, and specific power saving.

As described above, the features of the present invention will be described below.
(1) The main body (1), which is a device, monitors the presence or absence of a human body. During normal standby, microwaves are sent out by pulse modulation, and if the presence of a human body is revealed by pulse modulation, it is changed from pulse modulation to no modulation. Switch to continuous wave to monitor human body movements and breathing in more detail,
(2) The main body (1) monitors the presence or absence of a human body and can suppress the current consumption without detecting the human body as much as possible. The power source of the main body (1) is always used as a battery (24 hours 365 days). And it can be operated without interruption for a long time. Although it indicates how long it is, it is generally about half a year to one year although it varies depending on the setting of the pulse modulation transmission interval (transmission interval such as once every 10 seconds or once every 5 seconds).
(3) Since the power source is a battery, there is no risk of electric shock or leakage even in a bathroom with moisture, and the user can easily attach it. The bathroom is a place where the human body is particularly likely to be abnormal.
(4) Switch the microwave from pulse modulation to unmodulated continuous wave and monitor the body movement and respiration of the human body in more detail, and detect a certain pattern (the body movement is lost but the person is breathing) If this happens, it will be reported to the outside that an abnormality has occurred in the human body. As a result, it is particularly likely that the human body will be abnormal, and it is difficult to notice in a closed room, detecting abnormalities in the bathroom, reporting to the outside, and performing rescue and lifesaving early, resulting in death or severe sequelae The rate of leaving can be reduced. In addition, even if the user simply falls asleep in the bathtub, a third party can be woken up by a report, so the risk of drowning can be avoided.

1 Body
2 Doppler module
3 Control circuit
3a Amplifier circuit
3b Digital signal processor
3c low-pass filter
4 Power supply
5 Short-range wireless communication unit

Claims (2)

  In a device that detects a human body in a living space using a microwave Doppler sensor and monitors biological information by detecting body movement and breathing of the human body, when the device is in a standby state to detect the presence or absence of a human body when the power is turned on The microwave Doppler sensor is used to monitor the presence or absence of the human body with low current consumption by sending microwaves at intervals as pulse modulation, and when the human body is not detected again within a certain time after the detection of the human body, According to the microwave Doppler sensor, the microwave transmitted from the microwave Doppler sensor is continuously transmitted by switching from pulse modulation to unmodulated continuous wave to monitor the body movement and respiration of the human body in more detail. Human body detection and biological monitoring method. In a device that detects living body space using a microwave Doppler sensor and monitors biological information by detecting body movement and breathing of the human body,
(A) When the apparatus is on standby for detecting the presence or absence of a human body when the power is turned on, the microwave Doppler sensor is sent at intervals as pulse modulation to monitor the presence or absence of a human body with low current consumption And
(B) When the microwaves transmitted at intervals by the pulse modulation detect a human body more than a predetermined number of times within a predetermined time, it is determined that there is a human body,
(C) After determining that there is a human body, when the microwaves transmitted at intervals by the pulse modulation do not detect the human body again within a predetermined time, the microwaves transmitted from the microwave Doppler sensor are pulse-modulated. To monitor the movement and breathing of the human body in more detail by switching from unmodulated continuous wave and continuously sending
(D) By switching the microwave to an unmodulated continuous wave and continuously transmitting it, the body motion and respiration of the human body are monitored in more detail, and if no body motion and respiration are detected, it is determined that there is no human body Then, the microwave sent from the microwave Doppler sensor is switched from unmodulated continuous wave to pulse modulation and sent back at an interval to return to the standby state to monitor the human body with low current consumption,
(E) On the other hand, when the body motion and respiration are detected in more detail by monitoring the body motion and respiration of the human body by switching the microwave to the unmodulated continuous wave and continuously sending it, , Continue to monitor the body movement and breathing of the human body in detail by continuously sending out the unmodulated continuous wave by judging that there is a human body and no abnormality,
(F) When the detection of the human body motion and respiration disappears during the detailed monitoring of the human body motion and respiration in (e), it is determined that there is no human body and is sent from the microwave Doppler sensor. Switch from unmodulated continuous wave to pulse modulation and send back at intervals to return to the standby state to monitor the human body with low current consumption,
(G) On the other hand, when the detection of body motion disappears and only breathing is detected while monitoring the body motion and respiration of the human body in detail on the other hand (e), it is determined that the human body is abnormal,
(H) sending an alarm signal by the short-range wireless communication means provided in the device to report an abnormal situation to the outside;
A human body detection and biological monitoring method using a microwave Doppler sensor, which is performed in the order of (a) to (h).

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