CN112767579A - Indoor personnel confirmation system and confirmation method - Google Patents
Indoor personnel confirmation system and confirmation method Download PDFInfo
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- CN112767579A CN112767579A CN202011605561.6A CN202011605561A CN112767579A CN 112767579 A CN112767579 A CN 112767579A CN 202011605561 A CN202011605561 A CN 202011605561A CN 112767579 A CN112767579 A CN 112767579A
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/10—Detecting, e.g. by using light barriers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The invention provides an indoor personnel confirmation system, which comprises: the entrance sub-machine is arranged in an entrance area of the indoor space and used for triggering the judgment of entering and exiting the room and acquiring a human body biological signal in the entrance area; the host computer is arranged in a first residence area of the indoor space and used for receiving the trigger signal of the inlet sub-machine to start and judge, and the indoor space personnel enter the room and leave the room by combining biological signals collected by all indoor areas in a plurality of continuous sampling time. In the invention, an entrance sub machine is arranged right below the entrance as a trigger for entering and exiting a room, and the judgment of entering and exiting the room is carried out by matching with an indoor main machine and an expansion sub machine. That is, when the exit is not triggered, even if the doppler sensor in the room does not detect it, the entering judgment can be accurately regarded as that the room is always present, thereby preventing the false alarm. In addition, the invention also provides a confirmation method realized by the confirmation system.
Description
Technical Field
The invention relates to the technical field of Doppler sensing, in particular to a confirmation system and a corresponding confirmation method for realizing accurate judgment of the existence of indoor personnel by utilizing a Doppler sensor in places such as hotels, student dormitories and the like where people stop moving due to sleeping and whether the people exist or not can not be monitored through camera shooting.
Background
In the doppler sensor technology, the presence of a person in a room is basically determined by individual detection by a doppler sensor, and the presence of a person in a room can be determined by detecting not only the movement of a person such as walking but also the characteristics of biological signals such as respiration and minute movement by the doppler sensor.
In reality, due to the cost restriction of a doppler sensor detection system or device, the number of doppler sensors cannot be guaranteed to be enough to cover all indoor areas, in addition, arrangement of furniture and the like can also cause doppler to be unable to detect some areas, and once a person enters an uncovered area, the existing detection system or device cannot accurately judge whether the person is indoors.
Disclosure of Invention
The embodiment of the invention provides a system and a method for confirming existence of indoor personnel, which ensure accurate judgment of indoor personnel entering and exiting through arranging a submachine for triggering at an entrance.
In order to solve the technical problem, the embodiment of the invention discloses the following technical scheme:
the embodiment of the invention provides an indoor personnel confirmation system, which comprises:
the entrance sub-machine is arranged in an entrance area of the indoor space and used for triggering the judgment of entering and exiting the room and acquiring a human body biological signal in the entrance area;
the host computer is arranged in a first residence area of the indoor space and used for receiving the trigger signal of the inlet sub-machine to start and judge, and the indoor space personnel enter the room and leave the room by combining biological signals collected by all indoor areas in a plurality of continuous sampling time.
Further, the system further comprises:
and the expansion sub-machine is arranged in other resident areas of the indoor space outside the detection area of the main machine and is used for acquiring human body biological signals in the other resident areas.
Further, the confirmation system further comprises:
the power controller controls the room power, receives the control of the host computer, and is a device for turning on or off the power through the signal of the existence or nonexistence of the personnel sent by the host computer.
Further, the confirmation system further comprises:
and the management device displays the indoor personnel state through personnel existence or personnel nonexistence signals sent by the host computer, and performs alarm display through abnormal signals.
Preferably, the first residence area is an area where indoor personnel reside for the longest time.
Further, the inlet sub-machine comprises:
a triggering module for realizing human body detection through an infrared sensor; and
an entrance acquisition module for acquiring human body biological signals through a Doppler sensor; and
an inlet submachine calculating module for calculating a notification detection value according to the human body biological signal, wherein the notification detection value is a value obtained by adding absolute values of point potential differences in sampling detection values when the Doppler sensor completes a fixed number of sampling; and
an entrance sub machine communication module which realizes the communication with the host machine through the wired or wireless network communication technology.
Further, the host includes:
a host communication module for communicating with other sub-machines; and
the host acquisition module is used for acquiring human body biological signals of the first residence area; and
the host computer computing module is used for computing the strength of frequency signals corresponding to respiration and body movement of human biological signals; and
and the judging module is used for judging the strength of the biological signal and judging whether the detected value is in the range of the existence of the person.
Further, the expansion sub-machine comprises:
an expansion acquisition module for realizing human body biological signal acquisition through a Doppler sensor; and
an expansion submachine calculation module used for calculating the strength of frequency signals corresponding to respiration and body movement of human biological signals; and
an expansion sub-machine communication module which realizes the communication with the main machine through the wired or wireless network communication technology.
Based on the confirmation system, the embodiment of the invention also provides an indoor personnel confirmation method, which comprises the following steps:
step S1: when a person enters a room, the entrance sub-machine detects the existence of the human body by using the trigger module, and all devices of the confirmation system are started;
step S2: simultaneously acquiring human body biological signals in the corresponding area by the inlet sub-machine, the host machine and the expansion sub-machine, and respectively turning to the steps S3-S5 which are simultaneously carried out;
step S3: the entrance sub-machine takes the value obtained by adding the absolute values of the point potentials in the detection values as a passing detection value for a fixed number of continuous sampling, and then the step S6 is carried out;
step S4: the host computer calculates the human body biological frequency consisting of the body motion frequency band power added value and the breathing frequency band power added value in the continuous detection time, and the step S7 is carried out;
step S5: the expansion submachine calculates the human body biological frequency consisting of the body motion frequency band power added value and the breathing frequency band power added value within the continuous detection time, and the step S8 is carried out;
step S6: the host judges whether the passing detection value exceeds a preset passing threshold value or not, if so, whether a person enters the room or not is judged, and if not, whether no person enters the room is judged;
step S7: the host judges whether the human body biological frequency calculated by the host exceeds a preset existence threshold, if so, a person exists in the first residence area, otherwise, no person exists;
step S8: the host machine judges whether the human body biological frequency calculated by the expansion submachine exceeds a preset existence threshold value, if so, people exist in other resident areas, otherwise, no people exist;
step S9: if no person exists in the steps S6-S8, the operation goes to the step S10 to start the room exit judgment, otherwise, the room entry judgment state is maintained and the steps S2-S8 are repeated;
step S10: and (5) after the steps of S2-S8 are repeatedly operated for at least 3 times, if all the detection results are judged to have no human body, only keeping the human body existence detection function of the entrance sub-machine, and closing other functions of the confirmation system.
The beneficial effects of the above technical scheme are that:
compared with the prior art that only Doppler sensing technology is used for confirming indoor personnel, the whole confirmation is designed into a set of complete identification system and a corresponding identification mechanism, when the personnel enter the room through the inlet area corresponding to the inlet sub-machine, the perception of the human body is realized based on the infrared sensing technology, and the whole system is triggered to start working, in the working process, no matter the personnel are in an inlet area or any resident area in a room, only the corresponding sub-machine or host machine collects and detects the biological data of the human body, and whether the personnel exist is judged by respectively utilizing different judging mechanisms, and based on the judgment state of the existence of the personnel, the judgment mechanism of the existence of no personnel is not switched to until the judgment result of the existence of the personnel is lost in the continuous detection process, and the system is controlled to enter the standby state of no personnel.
In the invention, an entrance sub machine is arranged right below the entrance as a trigger for entering and exiting a room, and the judgment of entering and exiting the room is carried out by matching with an indoor main machine and an expansion sub machine. That is, when the exit is not triggered, even if the doppler sensor in the room does not detect it, the entering judgment can be accurately regarded as that the room is always present, thereby preventing the false alarm.
Drawings
In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for a person skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is one embodiment of the present invention provided based on the principles of the system;
fig. 2 shows a corresponding method based on the system shown in fig. 1.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the embodiment shown in fig. 1, an indoor personnel confirmation system is provided that assumes that there is one other residence area in the indoor space in addition to the entrance area, the first residence area, and designates the other residence area as the second residence area.
The entrance sub-machine is arranged in an entrance area of the indoor space, the entrance sub-machine is arranged on an entrance ceiling in principle, the detection range of the pyroelectric sensor is the periphery of the entrance (about 50cm away from the door), and the detection range of the Doppler sensor is the indoor side of the entrance.
Based on the principle of the technical scheme, one achievable specific structure is as follows: the entrance handset is composed of a microwave doppler sensor and a pyroelectric sensor (infrared human body sensor), an a/D converter for digitizing the output of the sensors, an arithmetic unit for calculating power, and a communication unit for communicating with the RS-422 line via the host computer.
The main machine is arranged in a first residence area of the indoor space and is arranged right above the indoor bed in principle.
Based on the principle of the technical scheme, one achievable specific structure is as follows: the main unit includes an A/D converter for digitizing the output of the microwave Doppler sensor, an arithmetic unit for performing frequency analysis (FFT) and power calculation, a determination unit for performing presence determination, a slave unit communication unit for performing communication via the slave unit and an RS-422 line, a power supply controller, a management device, and a network communication unit for performing communication via an Ethernet line or a Wifi line.
And the expansion sub-machine is arranged in the second residence area and is used for acquiring the human body biological signals in the second residence area.
Based on the principle of the technical scheme, one achievable specific structure is as follows: the entrance handset is composed of a microwave doppler sensor and a pyroelectric sensor (infrared human body sensor), an a/D converter for digitizing the output of the sensors, an arithmetic unit for calculating power, and a communication unit for communicating with the RS-422 line via the host computer.
After the detection is performed by the infrared sensor of the entrance sub-machine, the detection of the infrared sensor disappears, and if the detection is performed by the Doppler sensor, the entrance of a person is considered. After entering, indoor detection and disappearance of detection are carried out, the infrared sensor detection appears again, and the room is regarded as being returned through disappearance of detection (no indoor detection). This is because there are more than 2 persons in the room, and when 1 person goes out, there are always indoor detections or detections of the main unit and the expansion sub-unit. Exist at all times. Even if only 1 person exists, when the person goes to the toilet and bathroom near the entrance, the detection of the main unit and the expansion sub-unit disappears, the infrared sensor of the entrance sub-unit does not detect, or after the detection, the person is not regarded as leaving the bathroom after the detection. Therefore, the infrared sensing region of the entrance needs to be directly below the entrance and narrower than the range of passing sensing.
It should be noted that, the setting of each area is realized based on the detection range of the doppler sensor, the range size depends on the detection range of the corresponding doppler sensor such as the entrance sub-machine, the host machine, the expansion sub-machine, etc., and the present embodiment is explained by taking the setting of one doppler sensor as an example, so the detection range of each area in the present embodiment depends on the detection range of one doppler sensor, and accordingly, when the number of the doppler sensors of the entrance sub-machine, the host machine, and the expansion sub-machine is increased, the corresponding area range is enlarged.
For the definitions of "first" and "second" in the first residence area and the second residence area, except for distinguishing different residence areas, the first residence area generally refers to an area where the personnel residence time is longest, and in general, this area is an area where the bed is located.
The system is mainly applied to hotels, student dormitories, employee dormitories and the like, and is used for confirming whether a person is in a room or not and sending out existence notification so as to control power supply.
Suitable objects of the system include:
in a hotel, in-room confirmation and power control are performed by a house card or the like. However, problems occur in that the employee suddenly enters the room when the guest is in the room, and the air conditioner still operates when the guest is not in the room, due to loss of the room card, forgetting to pull out the room card, forgetting to insert the card during the day, a malfunction, and the like.
If the resident is not convenient to move due to illness or the like, the outside cannot be monitored, and even if a death accident occurs, the resident is difficult to be found before the expected refuge day.
Because the student dormitory, the staff dormitory and the like are not linked with the key and an access room is not arranged, accidents such as forgetting to turn off the power supply and the air conditioner, getting ill and the like are easy to happen.
Aiming at the scenes and the objects, the confirmation system can be combined with the existing control equipment to judge whether the room is accessed or not and automatically start a power supply, an air conditioner and the like when the room is accessed, and the confirmation system is controlled to be closed when no person exists. In addition, even if a person is in the room, the person is reminded to the foreground manager when the person is not active for a long time.
The above description only describes the structure of one embodiment of the validation system, and the implementation logic of the specific functions thereof is described in detail below in conjunction with the validation method.
The confirmation method shown in fig. 2 is implemented by using the confirmation system shown in fig. 1, and the two methods together form a complete description of the entire technical solution, and the confirmation method includes the following implementation steps:
step S1: when a person enters the room, the entrance sub-machine detects the existence of the human body by using the trigger module, and all devices of the confirmation system are started.
The implementation principle of step S1 is: the pyroelectric sensor detects the presence of a human body by the movement of infrared rays emitted from the human body, and detects the presence of the human body when the human body is detected for 3 times (about 0.2 second) continuously.
If the inlet sub-machine is provided with a human body detection signal of the pyroelectric sensor, the inlet sub-machine sends a human body detection signal to the main machine and the expansion sub-machine, and if the system is provided with the power supply controller and the management device, the main machine sends a power supply ON signal to the power supply controller after receiving the human body detection signal and sends a human body signal to the management device.
Step S2: the entrance sub-machine, the main machine and the expansion sub-machine simultaneously acquire the human body biological signals in the corresponding areas and respectively switch to the steps S3-S5 which are simultaneously performed, wherein in the step, the entrance sub-machine, the main machine and the expansion sub-machine sample the output of the Doppler sensor at 16Hz by taking 16Hz sampling frequency as an example.
Step S3: the entrance slave machine proceeds to step S6 by adding the absolute values of the point potentials in the respective detection values for a fixed number of consecutive samples as a passing detection value.
In this step, the doppler sensor adds the absolute value of the point potential in each detection value every 16 samples to obtain a passing detection value.
Step S4: the host computer calculates the human body biological frequency consisting of the body motion frequency band power added value and the breathing frequency band power added value in the continuous detection time, and the step S7 is carried out.
In step S4, the arithmetic unit of the host computer samples the output of the doppler sensor at 16Hz, performs frequency analysis every 16 seconds, and adds the power of the body motion frequency band (about 1 to 3Hz) and the power of the respiratory frequency band (about 0.25 to 3Hz) to obtain the respiratory frequency band power added value and the body motion frequency band power added value.
Step S5: the expansion sub-machine calculates the human body biological frequency consisting of the body motion frequency band power added value and the breathing frequency band power added value in the continuous detection time, and the step is switched to step S8.
In step S5, the computing unit of the extension slave unit samples the output of the doppler sensor at 16Hz, and performs the same computation as that of the master unit on the past 256 data sets including the latest sampling result in response to the presence computation request from the master unit.
Step S6: the host judges whether the passing detection value exceeds a preset passing threshold value or not, if so, the existence of a person is judged, and if not, the existence of no person is judged.
In step S6, when the detected value exceeds the pass detection threshold, the pass detection is determined. The passing detection threshold is set to about 200% of the passing detection value when no person is present. The reason for 200% is that the passing detection value of the doppler sensor of the entrance slave unit is 200% or more compared to when no person is present, since a person passes directly below the doppler sensor. In addition, due to the filter characteristics, even if a low-frequency signal remains after the pass, the low-frequency signal does not exceed 200%.
Step S7: the host judges whether the human body biological frequency calculated by the host exceeds a preset existence threshold, if so, a person exists in the first residence area, otherwise, no person exists.
In step S7, the respiratory band power added value and the body motion band power added value are determined to be present when the body motion band presence threshold value and the respiratory band presence threshold value are equal to or greater than the respective threshold values. The respiratory frequency band existence threshold and the body motion frequency band existence threshold are set to be about 120% of the maximum value of the respiratory frequency band power added value and the body motion frequency band power added value when no person exists.
Step S8: and the host machine judges whether the human body biological frequency calculated by the expansion submachine exceeds a preset existence threshold value, if so, a person exists in the second residence area, otherwise, no person exists.
In step S8, the respiratory band power added value and the body motion band power added value are determined to be present when the body motion band presence threshold value and the respiratory band presence threshold value are equal to or greater than the respective threshold values. The respiratory frequency band existence threshold and the body motion frequency band existence threshold are set to be about 120% of the maximum value of the respiratory frequency band power added value and the body motion frequency band power added value when no person exists.
Step S9: if no person exists in steps S6-S8, the process proceeds to step S10 to start the room exit judgment, otherwise, the room entry judgment state is maintained and steps S2-S8 are repeated.
In step S9, the master unit determines the presence of the master unit and the extension slave unit by the determination unit, and determines whether the next presence is present based on the passage detection data of the entrance slave unit. However, the operation is continued during the presence determination (64s) of 4 operation cycles.
Before the entrance sub-machine judges that no one is available, the entrance sub-machine sends the following passing detection data to the main machine:
as can be seen from the above table, in each time interval, presence/absence of human body detection (detection by the pyroelectric sensor performed 3 times in succession) and presence/absence of passing detection (detection by the doppler sensor is equal to or more than the passing detection threshold) are transmitted, and thereafter, repetition is performed every 5 seconds until no-man determination is performed.
After the human body detection signal 5s, the main unit starts sampling by the doppler sensor, performs presence calculation every 16s, and if there is an expansion sub-unit, returns a presence calculation request to the expansion sub-unit, and then repeats until nobody judgment is performed.
If there is a body check in the pass check data, there is no body check 3 times consecutively after 2 seconds, for example, there is a body check from 4 seconds to 3 seconds ago, from 1 second ago to the present time when there is a body check, and there is no body check and no pass check from 5 seconds ago to 2 seconds ago in the next received pass check data, the no-confirmation operation is performed.
Step S10: and (5) after the steps of S2-S8 are repeatedly operated for at least 3 times, if all the detection results are judged to have no human body, only keeping the human body existence detection function of the entrance sub-machine, and closing other functions of the confirmation system.
When the presence detection of the master unit or the extension slave unit is not performed 16 seconds after the start of the confirmation operation, the presence detection is continuously performed for the presence determination (64s) exceeding 4 calculation cycles, and the determination is regarded as no-human determination. During the operation of no confirmation, the human body is detected, the existence of the host machine or the expansion sub machine is detected, and the operation returns to the beginning of no confirmation.
Note that, when the presence determination is performed with the master unit and the extension slave unit, and the presence detection is not performed with the extension slave unit for a longer time than a set time (generally, about 90 minutes), an abnormality alarm is transmitted to the management device.
The reason for setting to 90 minutes is: when the main machine or the expansion sub-machine is arranged above the bed, the turning-over action is carried out during the period even in a deep sleep, and the existence detection is carried out when the added value of the power of the body movement frequency band exceeds the existence threshold of the body movement frequency band. Furthermore, sleeping infants with minimal respiratory band power summation are dangerous if left alone in the room beyond this time.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. An indoor personnel verification system, said system comprising:
the entrance sub-machine is arranged in an entrance area of the indoor space and used for triggering the judgment of entering and exiting the room and acquiring a human body biological signal in the entrance area;
the host computer is arranged in a first residence area of the indoor space and used for receiving the trigger signal of the inlet sub-machine to start and judge, and the indoor space personnel enter the room and leave the room by combining biological signals collected by all indoor areas in a plurality of continuous sampling time.
2. An indoor personnel verification system according to claim 1 and further comprising:
and the expansion sub-machine is arranged in other resident areas of the indoor space and is used for acquiring human body biological signals in the other resident areas.
3. An indoor personnel confirmation system according to claim 1, wherein the system further comprises:
the power controller controls the room power, receives the control of the host computer, and is a device for turning on or off the power through the signal of the existence or nonexistence of the personnel sent by the host computer.
4. An indoor personnel confirmation system according to claim 1, wherein the system further comprises:
and the management device displays the indoor personnel state through personnel existence or personnel nonexistence signals sent by the host computer, and performs alarm display through abnormal signals.
5. An indoor person verification system according to claim 1, wherein the first residence area is an area where the indoor person resides for the longest time.
6. An indoor personnel verification system according to claim 1 wherein said entrance sub-unit comprises:
a triggering module for realizing human body detection through an infrared sensor; and
an entrance acquisition module for acquiring human body biological signals through a Doppler sensor; and
an inlet submachine calculating module for calculating a notification detection value according to the human body biological signal, wherein the notification detection value is a value obtained by adding absolute values of point potential differences in sampling detection values when the Doppler sensor completes a fixed number of sampling; and
an entrance sub machine communication module which realizes the communication with the host machine through the wired or wireless network communication technology.
7. An indoor personnel verification system according to claim 1 wherein said host computer comprises:
a host communication module for communicating with other sub-machines; and
the host acquisition module is used for acquiring human body biological signals of the first residence area; and
the host computer computing module is used for computing the strength of frequency signals corresponding to respiration and body movement of human biological signals; and
and the judging module is used for judging the strength of the biological signal and judging whether the detected value is in the range of the existence of the person.
8. The indoor person confirmation system according to claim 2, wherein the expansion sub-machine includes:
an expansion acquisition module for realizing human body biological signal acquisition through a Doppler sensor; and
an expansion submachine calculation module used for calculating the strength of frequency signals corresponding to respiration and body movement of human biological signals; and
an expansion sub-machine communication module which realizes the communication with the main machine through the wired or wireless network communication technology.
9. An indoor personnel confirmation method implemented based on the system of claim 2, the method comprising:
step S1: when a person enters the room, the entrance sub-machine detects the existence of the human body and starts all devices of the confirmation system;
step S2: simultaneously acquiring human body biological signals in the corresponding area by the inlet sub-machine, the host machine and the expansion sub-machine, and respectively turning to the steps S3-S5 which are simultaneously carried out;
step S3: the entrance sub-machine takes the value obtained by adding the absolute values of the point potentials in the detection values as a passing detection value for a fixed number of continuous sampling, and then the step S6 is carried out;
step S4: the host computer calculates the human body biological frequency consisting of the body motion frequency band power added value and the breathing frequency band power added value in the continuous detection time, and the step S7 is carried out;
step S5: the expansion submachine calculates the human body biological frequency consisting of the body motion frequency band power added value and the breathing frequency band power added value within the continuous detection time, and the step S8 is carried out;
step S6: the host judges whether the passing detection value exceeds a preset passing threshold value or not, if so, whether a person enters the room or not is judged, and if not, whether no person enters the room is judged;
step S7: the host judges whether the human body biological frequency calculated by the host exceeds a preset existence threshold, if so, a person exists in the first residence area, otherwise, no person exists;
step S8: the host machine judges whether the human body biological frequency calculated by the expansion submachine exceeds a preset existence threshold value, if so, people exist in other resident areas, otherwise, no people exist;
step S9: if no person exists in the steps S6-S8, the operation goes to the step S10 to start the room exit judgment, otherwise, the room entry judgment state is maintained and the steps S2-S8 are repeated;
step S10: and (5) after the steps of S2-S8 are repeatedly operated for at least 3 times, if all the detection results are judged to have no human body, only keeping the human body existence detection function of the entrance sub-machine, and closing other functions of the confirmation system.
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| US20150154849A1 (en) * | 2013-12-04 | 2015-06-04 | Oki Electric Industry Co., Ltd. | Control device, and control system |
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| JP2020018861A (en) * | 2019-08-23 | 2020-02-06 | 富士通株式会社 | Bed, sensor system, and sensor information processing device |
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