KR100744189B1 - System and method of occupancy sensing at home/office - Google Patents

Abstract

A space occupancy sensing system and a method thereof are provided to operate person's movement and space occupancy states by using a timer and topology, thereby sensing the person's space occupancy. A topology storage(140) stores topology which considers whether a person is movable in plurally divided spaces. Sensing units(300) sense a space occupancy state by the person. An information collector(110) collects sensing information from the sensing units(300). A mobility calculator(120) decides on the person's movement state based on neighbor node information of the topology and the collected sensing information. A space occupancy calculator(130) increases/decreases the number of space occupancy times based on the person's movement state and the collected sensing information, and decides on the current number of space occupancy times. A timer setup unit(125) sets a timer for a predetermined period in accordance with node characteristics whenever the space occupancy state is sensed by the sensing units(300) with respect to each of the divided spaces.

Description

System and Method of Occupancy Sensing at Home / Office}

1 is a diagram illustrating the structure of a typical family home in accordance with a preferred embodiment of the present invention;

FIG. 2 is a view for explaining a process of generating a topology based on the structure of a house in FIG. 1;

FIG. 3 is a diagram illustrating the topology generated in FIG. 2 in a tree structure; FIG.

4 is an overall system configuration for detecting a space occupancy state by a person according to an embodiment of the present invention;

5A to 5E are state diagrams illustrating a calculation process of the movement calculating unit of FIG. 4 when moving a space occupancy state;

6A to 6E are state diagrams for explaining a space occupancy calculating unit that calculates how many people are in a specific space.

<Explanation of symbols for the main parts of the drawings>

100: server 110: information collector

120: movement operation unit 125: timer setting unit

130: space occupancy calculation unit 135: timer update unit

140: topology storage 200: AP (Access Point)

300: sensing unit

The present invention relates to detecting the area occupied by a person in a home or office, and more particularly, a system for detecting a space occupied by a person by calculating a state of movement and space occupancy of a person using a topology and a timer and its It is about a method.

In general, homes and offices are spaces where multiple people live or work. The home and office are separated by walls, and the space is connected through the door.

In order to determine whether there is a person in a specific space of a house or office divided into a plurality of spaces, a motion sensor or a temperature sensor must be installed in each space. In fact, the front doors of ordinary homes are equipped with a device that automatically turns on the lights when a person's movement is captured.

However, the sensed information is only valid for a few seconds and does not recognize whether the space occupied state by the human has changed. In particular, since the commercialized motion sensor does not detect fine movement, there is a problem in that the sensor needs to be operated again with an exaggerated action in order to operate the sensor.

As described above, the occupancy information of a person may be applied to a variety of applications ranging from convenience of automatically turning on / off a light to safety of identifying a person to be rescued in an emergency situation such as a fire.

The present invention was devised to solve the above-mentioned problem, and connects an existing sensor to a communication network, and accurately detects a change in the occupied state of a space by a person based on a topology according to spatial characteristics. It is an object of the present invention to provide a system and a method for detecting whether a person occupies a space in a specific space.

As described above, since the present invention is a space occupancy sensing system connected to a communication network, not only the space occupancy information by a person can be more accurately understood, but also the space occupancy information can be confirmed from the outside.

Since the present invention can more accurately determine the space occupancy state, for example, when applied to an application that automatically turns on / off a light, it provides a convenience that does not need to exaggerate to turn off the light.

In addition, the present invention allows the external occupancy of the space occupied state when an emergency situation such as a fire occurs, so that a person in a dangerous situation can be quickly rescued.

Other objects and advantages of the invention will be described below and will be appreciated by the embodiments of the invention. Furthermore, the objects and advantages of the present invention can be realized by means and combinations indicated in the claims.

The present invention for achieving the above object is a system for detecting the occupancy of the space by using a topology, a topology storage unit for storing a topology in consideration of whether a person can move in a plurality of divided spaces, each node of the topology A sensing unit installed in the sensing unit for detecting a space occupancy state by the person, an information collecting unit for collecting sensing information from the sensing unit, and determining the movement state of the person based on the collected sensing information and neighbor node information of the topology And a space occupancy calculating unit for determining a current space occupancy amount by adding or subtracting a space occupancy based on the collected sensing information and the movement state of the person of the movement calculating unit.

In addition, the present invention is a method for detecting a space occupancy of a person using a topology, generating and storing a topology in consideration of a human's movement in a plurality of divided spaces, from the sensing unit installed in each node of the topology to the person Detecting a space occupancy state by the mobile terminal; collecting information for collecting sensing information from the sensing unit; determining a movement state of a person based on the collected sensing information and neighbor node information of the topology; and And a space occupancy calculation step of determining a current space occupancy amount by adding or subtracting the space occupancy amount based on the collected sensing information and the movement state of the person.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations. Particularly, in the following description, a home is illustrated as an example, but it is apparent to those skilled in the art that the technical idea of the present invention can be extended to an office or a store.

1 is a diagram illustrating the structure of a typical family home according to a preferred embodiment of the present invention. Each space has its own characteristics such as living room, bedroom, toilet and veranda. The illustrated home is composed of a living room divided into two spaces, a plurality of bedrooms connected to the living room, a restroom attached to the bedroom and the living room, and a door connecting the space and the space. do.

FIG. 2 is a diagram for describing a process of generating a topology based on the structure of a house shown in FIG. 1. As shown, the topology according to the present invention separates each space in which the characteristics of the space appear, so that a human's movable path (copper line: a link between space and space, if a person can move between space A and space B) A copper wire exists between A and space B). For example, in a home house structure, the topology nodes can consist of multiple rooms and doors. At this time, nodes adjacent to each other (for example, a room and a door to enter the room) are connected by a link .

The reason for creating the topology is to estimate the path of human movement by separating the spaces that are not directly connected. For example, if there is no movement of a person in the living room, but motion is detected in each bedroom, it can be seen that there is a person in each room. If you don't form a topology, it's hard to tell if a person is walking around each room or if there are other people in each room.

In addition, topologies can help detect a person moving from one space to another. For example, in a home with a small number of families, if a person's movement was detected in the bedroom at 7:00, in the bedroom door at 7:01, and in the living room at 7:02, there is a high probability that the person moved from bedroom to living room. high. The results of observing a family with a small number of families show that a case where two or more people move in a different direction from a space adjacent to the same time is less likely to occur when one person moves from one space to another. As such, the topology helps to identify whether a person moves from one space to another.

On the other hand, after connecting each person's moving line (a person's movable path) in each space, the labeling is performed to display the characteristics of the space. The labeling may consist of numbers and letters indicating the characteristics of the space. The labeling scheme shown in FIG. 2 is a tree representation of the topology. If you look closely, the topologies that connect spaces to spaces are more common than trees. For example, it is assumed that when there is a toilet or a veranda shared by two rooms in the case of a home, it is not often passed through another room to move to a shared toilet or veranda, and is illustrated in FIG. 2 for convenience of installation. Labeling as used is used.

Letters, the second element of labeling, distinguish space features. For example, in the embodiment shown in FIG. 2, the living room is labeled L, the bedroom is B, the toilet is R, and the door is labeled D. At this time, looking at the characteristics of the space, the bedroom and living room can be divided into a space where people stay for a long time, a space where people spend a short time in the toilet and veranda, and a space that connects the space and the space such as a door. Since the space occupies the space occupancy characteristics of the person as described above, the classification of the space by the characteristic helps in determining the algorithm to determine whether the space is occupied and the initialization of the timer. Detailed processing according to these spatial characteristics will be described later.

As an example of tree topology labeling, the living room is 100, and the bedroom connected to the living room is 110 and the bathroom connected to the bedroom is 111. In addition, the nodes that start all the moving lines, such as the living room, can be extended to 200, 300, and the like.

In Fig. 2, the values labeled with letters and numbers in each space are set by this rule.

FIG. 3 is a diagram illustrating the topology generated in FIG. 2 in a tree structure. As shown in the figure, the topology generated in FIG. The topology thus formed is input to a central computer, i.e., a server, and used to detect changes in the space occupancy state by humans.

4 is an overall system configuration diagram for measuring a space occupancy state by a person using the above-described topology. As shown, the overall system of the present invention is a server 100 for determining the space occupancy state and the change by a person, an AP (Access Point, 200) and each space for collecting the sensing information and determine the movement of the person The sensing unit 300 is disposed in the.

In this case, the server 100, the AP 200, and the sensing unit 300 may be a distributed computing method for determining a person's movement in each space or a centralized computing method for centrally determining a space occupancy state of the entire system. Can be implemented.

The server 100 is a computer that performs a function of determining a space occupancy state and its change by inputting information collected from each sensing unit 300. The algorithm for determining the space occupancy state and its change will be described later.

The server 100 may include an information collecting unit 110 for collecting information sensed from the sensing unit 300, a movement calculating unit 120 for determining whether a person moves, and a timer setting unit for setting a timer for movement calculations. (125), the space occupancy calculation unit 130 for determining whether or not the space occupancy state of several people, the timer update unit 135 for updating the timer to reflect the duration of the space occupancy state and according to the house structure It includes a topology storage unit 140 for storing the topology.

The server 100 may be provided in each home, but when a plurality of households live together, such as an apartment, may be provided for each apartment building or apartment complex.

The AP 200 collects information from the sensing unit 300 and delivers the collected information to the server 100. Here, when the entire system is implemented in a distributed computing scheme, the AP 200 also grasps a space occupancy state of a person and then delivers it to the LBS. In other words, the AP 200 performs a part of the server 100.

If the entire system is implemented in a centralized computing scheme and each sensing unit 300 includes a communication module, the sensing unit 300 directly transmits the sensing information to the server 100 without passing through the AP 200. You can also pass it. In this case, the AP 200 is not necessary.

In addition, the function of the server 100 may be integrated into the AP 200 to be implemented to determine the space occupancy state in the AP 200.

It is a network gateway of each home to implement home networking. Therefore, the information sensed by the sensing unit 300 is transmitted to the server 100 through the AP 200. In some cases, the sensing information may be transmitted to the server 100 without passing through the AP 200. In addition, the function of the server 100 may be integrated into the AP 200 to be implemented to determine the space occupancy state in the AP 200.

The topology storage unit 140 stores the topology in consideration of the human traffic line in the plurality of divided spaces. In particular, as described above with reference to FIGS. 1 to 3, the hierarchical storage is performed hierarchically from the start node to the end node of the moving line, and each node is classified and stored according to spatial characteristics.

The hierarchically stored topology can be used to determine whether a person moves from one space to another space, and according to spatial characteristics, the stored nodes can be used to set or update a timer.

The movement calculating unit 120 determines the occupied movement state based on the collected sensing information and the neighbor node information of the topology. In addition, the space occupancy calculating unit 130 determines the current space occupancy by adding or subtracting the space occupancy based on the collected sensing information and the occupying movement state of the movement calculating unit 120. The movement calculating unit 120 and the space occupancy calculating unit 130 use a timer to more accurately and efficiently perform the occupancy determination. The interworking relationship between the timer setting unit 125 and the timer updating unit 135 will be described later.

The sensing unit 300 is basically a device for detecting space occupancy and movement of a person (or pet).

There are various ways to detect space occupancy and movement. Motion sensors can detect human movements, and temperature sensors can detect temperature changes due to human occupancy. In addition, the space occupancy state or movement may be detected through the on / off of the electronic device, the on / off of the light, the open / closed state of the door, and the like. In addition, whether the mobile phone using the radio wave is continuously receiving a radio wave of a predetermined frequency, it is possible to detect the space occupancy state of the person through a voice recognition sensor.

The sensing unit 300 used in the detailed description and the claims is not limited to a motion sensor that detects a specific motion, but refers to all means capable of detecting a space occupancy state or a change thereof. Therefore, all means for detecting movement, on / off of electronic products, depressing a remote control button, temperature change, sound change, use of a mobile phone, etc. may be used as a term. Techniques for sensing such changes are well known and well known to those skilled in the art, and thus detailed descriptions thereof will be omitted.

In addition, the sensing unit 300 includes a sensor, a microprocessor for storing or processing the sensed information, and a communication module for transmitting the sensing information to the AP 200 or the server 100.

The sensing unit 300 having the above function may be installed in one space according to the above-described topology, but it is preferable to install a combination of various sensors to reflect the characteristics of the space.

5A to 5E are state diagrams illustrating a calculation process of a movement calculator when moving a space occupancy state. The movement calculating unit 120 determines a movement between the living space in the street such as the door and the corridor. For convenience of explanation, the entire space is limited to A and B, and A and B are assumed to be connected by door D. The space A and the space B are found to be spaces connected by the door D based on the topology stored in the topology storage 140.

The movement calculating unit 120 can be easily implemented using the collection information of the motion sensor that can sense the direction of the human movement. For example, to determine a space occupancy movement of a person through the door D, a focused beam is installed at the entrance and the exit of the door D, and when the beams of the entrance and the exit are detected in sequence, the movement calculating unit 120 detects the sequence of the sensor. According to which direction the person moved can be easily determined.

However, installing a motion sensor that can sense the direction of movement can reduce the economics of the system. Therefore, in the following description with reference to FIGS. 5A to 5E, an embodiment in which the movement calculating unit 120 detects a direction of a space occupancy movement of a person using only spatial occupancy information without using a motion sensor will be described.

As shown in FIG. 5A, the movement calculating unit 120 starts from an idle state. When the motion is detected in the space A or the space B from the sensing unit 300, the information collecting unit 110 receives the sensing information from the sensing unit 300, and the movement calculating unit 120 occupies the space based on the collected sensing information. Determine the status.

In addition, the timer setting unit 125 sets a timer for determining the space occupancy state of the movement calculating unit 120. The timer is preferably updated according to the spatial characteristics or the behavior characteristics of the occupant (high movement or frequent space movement) for accuracy of the determination of the space occupancy state. In particular, the spatial characteristics may be based on the nodes classified and stored according to the spatial characteristics in the topology storage 140.

Hereinafter, a description will be given focusing on a state change indicated by a thick solid line in the drawing.

5B is a state diagram for explaining when motion is detected in space A. FIG. As shown, when motion is detected in space A at 0 seconds, the information collecting unit 110 collects motion information from the sensing unit 300, and the movement calculating unit 120 transfers the space occupancy state from children to occupying A. Change it. In addition, the timer setting unit 125 sets the timer A to a predetermined time. In this embodiment, it is assumed that timer A is one second. This assumption is based on observations of human movements in the home and the results of experiments that took approximately 1 second to pass through the visit.

When the motion is detected again in the space A at 0.8 seconds, the movement calculating unit 120 maintains the space occupancy state in the occupying state A, and the timer setting unit 125 sets the timer A back to 1 second. In addition, when motion is detected again in the space A in 1.5 seconds, the movement calculating unit 120 maintains the space occupancy state in the occupying state A, and the timer setting unit 125 sets the timer A back to 1 second.

When the motion is detected again in the space A in 2.1 seconds, the movement calculating unit 120 maintains the space occupancy state in the occupying state A, and the timer setting unit 125 sets the timer A back to 1 second.

After that, if the motion is not detected until the time A of the timer A 1 second expires (that is, 3.1 seconds), the space occupancy state of the movement calculating unit 120 returns to the idle state again.

Table 1 shows the state changes according to the time change.

Elapsed time in seconds input condition Print 0 Motion Detection in Space A Convert to Occupy A Timer A setting 0.8 Motion Detection in Space A Keep A occupied Timer A setting 1.5 Motion Detection in Space A Keep A occupied Timer A setting 2.1 Motion Detection in Space A Keep A occupied Timer A setting 3.1 Timer A expired Convert to idle

5C is a state diagram for explaining when motion is detected in the space A and the door D. FIG. 5C is a scenario where a person in the space A moves to the space A rather than looking into the space B. FIG.

As illustrated in FIG. 5C, when a motion is detected in space A at 0 seconds, the movement calculating unit 120 changes the space occupancy state from idle to occupancy A state. In addition, the timer setting unit 125 sets the timer A to 1 second.

After the movement is detected in Moon D in 0.5 seconds, the movement calculating unit 120 changes from the occupied A state to the occupied AD state. The occupied AD state is a state for defining the movement of space A to space B.

If the motion is detected in the space A again in one second, the movement calculating unit 120 determines that the space occupied state remains in the space A, and converts the space occupied state into the occupied A state. At the same time, the timer setting unit 125 resets the timer A to 1 second.

After the movement is detected in the space A again in 1.5 seconds, the movement calculating unit 120 maintains the space occupancy state in the occupying state A, and the timer setting unit 125 sets the timer A back to 1 second.

After that, if the motion is not detected until the time 1 second of timer A expires (that is, 2.5 seconds), the space occupancy state of the movement calculating unit 120 returns to the idle state again.

Table 2 shows the state changes according to the time change.

Elapsed time in seconds input condition Print 0 Motion Detection in Space A Convert to Occupy A Timer A setting 0.5 Motion detection at door D Convert to Occupied AD One Motion Detection in Space A Convert to Occupy A Timer A setting 1.5 Motion Detection in Space A Occupy A Timer A setting 2.5 Timer A expired Convert to children

5D is a state diagram for explaining when a person moves from space A to space B. FIG. As shown, if motion is detected in space A in 0 seconds, the movement calculating unit 120 changes the space occupancy state from idle to occupancy A. In addition, the timer setting unit 125 sets the timer A to 1 second.

After the movement is detected in Moon D in 0.5 seconds, the movement calculating unit 120 converts from the occupied A state to the occupied AD state. The occupied AD state is a state for defining the movement of space A to space B.

If the motion is detected in the space B in one second, the movement calculating unit 120 determines that the person has moved from the space A to the space B, and converts the space occupied state into the occupied B state. Meanwhile, the timer setting unit 125 deletes the timer A and sets the timer B to 1 second.

When motion is detected again in the space B in 1.5 seconds, the movement calculator 120 maintains the space occupancy state as the occupancy B, and the timer setting unit 125 sets the timer B to 1 second again.

After that, if the motion is not detected until the time 1 second of the timer B expires (that is, 2.5 seconds), the space occupancy state of the movement calculating unit 120 returns to the idle state again.

Table 3 shows the state change according to the time change.

Elapsed time in seconds input condition Print 0 Motion Detection in Space A Convert to Occupy A Timer A setting 0.5 Motion detection at door D Convert to Occupied AD One Motion Detection in Space B Convert to Occupied B Delete timer A, set timer B 1.5 Motion Detection in Space B Occupy B Timer B Setting 2.5 Timer B expires Convert to children

5E is a state diagram for explaining when motion is sensed in both space A and space B. FIG. As shown, when motion is detected in space A in 0 seconds, the movement calculating unit 120 changes the space occupancy state from idle to occupancy A state. In addition, the timer setting unit 125 sets the timer A to 1 second.

When the motion is detected again in the space A at 0.8 seconds, the movement calculating unit 120 maintains the space occupancy state in the occupying state A, and the timer setting unit 125 sets the timer A back to 1 second.

On the other hand, if the motion is detected in the space B in 1.2 seconds, the movement calculator 120 determines that there is a person in both the space A and the space B, and converts the occupied state into the occupied AB state. Set timer B to 1 second.

When the motion is detected again in the space A in 1.4 seconds, the movement calculating unit 120 maintains the space occupancy state in the occupying AB state, and the timer setting unit 125 sets the timer A back to 1 second.

When motion is detected again in the space B in 1.7 seconds, the movement calculating unit 120 maintains the space occupancy state in the occupying AB state, and the timer setting unit 125 sets the timer B again to 1 second.

When the motion is detected in the door D in 2.1 seconds, the movement calculating unit 120 determines that the person moves in space, and converts the space occupancy state into the occupied ABD state.

In addition, if motion is not detected in space A until 1 second of timer A has elapsed (that is, 2.4 seconds), and motion is detected only in space B, the movement calculating unit 120 indicates that a person moves from space A to space B. Determine and convert the space occupancy state to occupancy B state. At this time, the timer setting unit 125 deletes the timer A and sets the timer B back to 1 second.

When the motion is detected again in the space B in 2.5 seconds, the movement calculating unit 120 maintains the occupancy state as the occupancy B, and the timer setting unit 125 sets the timer B to 1 second again.

After that, if the motion is not detected until the time 1 second of the timer B expires (that is, 3.5 seconds), the space occupancy state of the movement calculating unit 120 returns to the idle state again.

Table 4 shows the state change according to the time change.

Elapsed time in seconds input condition Print 0 Motion Detection in Space A Convert to Occupy A Timer A setting 0.8 Motion Detection in Space A Keep to occupy A Timer A setting 1.2 Motion Detection in Space B Convert to Occupancy AB Timer B Setting 1.4 Motion Detection in Space A Keep AB Timer A setting 1.7 Motion Detection in Space B Keep AB Timer B Setting 2.1 Motion detection at door D Convert to Occupied ABD 2.4 Motion detection only in space B Convert to Occupied B Delete timer A, set timer B 2.5 Motion Detection in Space B Keep occupied B Timer B Setting 3.5 Timer B expires Convert to children

In the description of Figs. 5B to E, the remaining portions except for the thick solid line in the drawings overlap with the above description, and thus detailed description thereof will be omitted.

6A to 6E are state diagrams for explaining a space occupancy calculating unit that calculates how many people are in a specific space. For convenience of description, one specific space will be described by way of example.

As shown in FIG. 6A, the space occupancy calculator 130 starts in a zero state where no person occupies a specific space. When the motion is detected from the sensing unit 300, the information collecting unit 110 receives information from the sensing unit 300, and the space occupant calculating unit 130 based on the number of people occupying the specific space (space occupancy number). Determine. In addition, the space occupant calculating unit 130 operates organically with the timer setting unit 125 and the timer updating unit 135 to accurately determine the space occupancy number. In addition, the calculation operation of the space occupant calculation unit 130 may be performed based on the occupied movement state information of the movement calculation unit 120, and may be performed simultaneously with the operation of the movement calculation unit 120. Hereinafter, a description will be given focusing on a state change indicated by a thick solid line in the drawing.

FIG. 6B is a diagram for describing a state in which the number of occupants is increased by detecting a motion in a specific space. As shown, the space occupancy calculator 130 starts from a state where the space occupancy is zero. In the drawing, occupancy state 0 means space occupancy 0, and occupancy states 1 and 1e mean space occupancy 1.

If the motion is detected in 0 seconds, the space occupancy calculating unit 130 converts the space occupancy number to one. At the same time, the timer E * (timers E1, timer E2, ..., timer En) is updated. Timer E * is the time to wait to return the space occupancy to zero when no motion is detected. That is, timer E1 is a time for returning the space occupancy to zero when timer E1 expires when space occupancy is 1, and timer E2 is a time for space occupancy equal to zero when timer E2 expires when space occupancy is two. It is time to return. The timer En is a time for returning the space occupancy to zero when the timer En expires when the space occupancy is n.

In general, in order to return the space occupancy of a specific space to zero, the larger the space occupancy is, the longer the timer time becomes. For example, when there are three people (space occupancy 3) than one person in space A (space occupancy 1), the time to return to the state where there are zero occupants (space occupancy 0) Longer

Therefore, as in the present embodiment, when the motion is detected in the state where the space occupancy is 0, the timer updater 135 updates the timer E1 from 0.9 hour to 1 hour, and the timer E2 from 1 hour to 1.1 hours. Here, the setting time of E * is just one example and may vary greatly depending on the characteristics of the space and the people using the space.

In addition, the timer setting unit 125 sets the timer E1 to 1 hour to monitor whether motion is detected for 1 hour.

Table 5 shows the state change according to the time change.

Elapsed time in seconds input condition Print 0 Motion detection in specific space Convert to Occupancy 1 Timer E * update, Timer E1 setting

6C is a state diagram for explaining when a person enters a specific space. As shown, the space occupancy calculator 130 starts from a state where the space occupancy is zero.

If the position information of the person according to the movement of the person's space occupancy state is transmitted from the movement calculating unit 120 in 0 second, the space occupancy calculating unit 130 increases the space occupancy number and converts the space occupancy state to 1 state. . In addition, the timer setting unit 125 sets the timer E1 to 1 hour to monitor whether the motion is detected for 1 hour.

Table 6 shows the state change according to the time change.

Elapsed time in seconds input condition Print 0 Receive person's entrance information Convert to Occupancy 1 Timer E1 setting

6D is a state diagram for explaining a state in which timer E1 has expired. As shown, the space occupancy calculation unit 130 starts in a state 1 occupied with one person in a specific space.

When one hour, which is the time of timer E1, expires at 0 seconds (if no motion is detected for one hour), the space occupancy calculating unit 130 determines that the space occupancy number 1 has an error, and converts the space occupancy number to 1e. Along with this, an alarm is sent to check whether or not a person is occupied in the space.

Alarms can be sent out in a variety of ways, including flashing sensor lights, on / off lights or ringing. The alarm transmission may be implemented by interlocking a server 100 that calculates and determines a space occupancy state and a control computer (not shown) that controls electronic devices in each space based on the determined space occupancy state.

After sending the alarm, the timer setting unit sets the timer U for a predetermined time. In this embodiment, it is assumed that timer U is 5 seconds. The timer U is a time waiting for a response from the occupant of the space after the alarm is sent.

When the motion is detected by the person occupying the space in 2 seconds, the space occupancy calculating unit 130 converts the space occupancy number to 1, and the timer updating unit 135 updates the timer E * to a longer time. It is assumed that the timer updater 135 of the present embodiment updates the timer E1 to 1.1 hours and the timer E2 to 1.2 hours.

Table 7 summarizes the state changes over time.

Elapsed time in seconds input condition Print 0 Timer E1 expired Convert to occupied 1e Alarm sending, timer U setting 2 Motion detection Convert to Occupancy 1 Timer E * Update

6E is a diagram for explaining a state in which timer E1 expires and there is no human response. As shown, the space occupancy calculation unit 130 starts from a state of space occupancy 1 with one person in a specific space.

As shown in Fig. 6D, when one hour, which is the time of timer E1, expires at 0 seconds (if no motion is detected for one hour), the space occupancy calculating unit 130 determines that the space occupancy number 1 has an error and sets the occupancy state to 1e. Convert to Along with this, an alarm is sent to check whether or not a person is occupied in the space.

After sending the alarm, the timer setting unit 125 sets the timer U to 5 seconds.

If the movement of the person is not detected for 5 seconds, the space occupancy calculator 130 converts the space occupancy number to 0, which is a state without a person. In addition, the timer updater 135 updates the timer E * to a shorter time in order to calculate a more accurate space occupancy state. In this embodiment, timer E1 is updated to 0.9 hours and timer E2 to 1 hour. In this way, the space occupancy can be calculated more frequently by updating the timer E *.

In particular, the timer E * may vary depending on the characteristics of the space. For example, the timer E * may differ because the toilet and bedroom occupy a large amount of time. The spatial characteristic information may be based on the nodes classified and stored according to the spatial characteristics in the topology storage 140.

Table 8 summarizes the state change over time.

Elapsed time in seconds input condition Print 0 Timer E1 expired Convert to occupied 1e Alarm sending, timer U setting 5 Timer U expired Convert to Occupied 0 Timer E * Update

In the description of Figs. 6B to 6E, the remaining portions except for the thick solid line in the drawings overlap with the above description, and thus detailed description thereof will be omitted.

As mentioned above, although this invention was demonstrated by the limited embodiment and drawing, this invention is not limited by this, The person of ordinary skill in the art to which this invention belongs, Of course, various modifications and variations are possible within the scope of equivalent claims.

According to the present invention, it is possible to more accurately determine the space occupancy state of a person by generating a topology according to the spatial characteristics.

In addition, it is possible to accurately calculate the space occupancy state while reducing the load on the server by setting or updating a timer to calculate the space occupancy state movement and the number of occupants.

The calculated space occupancy state can be used to automatically control the on / off of electric lights, electronic devices, etc., and furthermore, it can be used for lifesaving in case of emergency such as a fire as the space occupancy state of the person is accurately determined in the central computer. Can be.

Claims (12)

delete delete A system that detects the space occupancy of a person using a topology, A topology storage unit for storing a topology in consideration of whether a person is movable in a plurality of divided spaces; A sensing unit installed at each node of the topology to detect a space occupancy state by a person; An information collector for collecting sensing information from the sensing unit; A movement calculating unit for determining a movement state of a person based on the collected sensing information and neighboring node information of the topology; A space occupancy calculating unit for determining a current space occupancy amount by adding or subtracting a space occupancy based on the collected sensing information and the movement state of a person of the movement calculating unit; And a timer setting unit for setting a timer for a predetermined period according to the node characteristics whenever a space occupancy state is detected by the sensing unit for each space divided for determining a movement state of a person, The topology storage unit classifies and stores hierarchically from the start node to the end node of the copper line, and classifies and stores each node according to spatial characteristics. If the space occupancy state is not detected by the sensing unit until the timer expires for a specific space, the movement calculating unit returns the space occupancy state to the idle state for the specific space. Space occupancy detection system. The method of claim 3, The timer setting unit sets a timer E * for each space according to the node characteristics in order to determine a space occupancy for a specific space. If the space occupancy state is detected by the sensing unit before the timer E * expires, the timer updating unit for updating the timer E * longer Space occupancy detection system further comprising. The method of claim 4, wherein If the space occupancy state is not detected from the sensing unit until timer E * expires, the timer setting unit sets timer U, If the space occupancy state is detected from the sensing unit before the timer U expires, the space occupancy calculation unit maintains the space occupancy number, If the space occupancy state is not detected from the sensing unit until the timer U expires, the space occupancy calculating unit determines the space occupancy number to 0 and the timer updating unit updates the timer E * to a shorter time. Space occupancy detection system. The method of claim 5, The timer E * As space occupancy increases, Space occupancy detection system. delete delete A method of detecting space occupancy of a person using a topology, Generating and storing topologies in consideration of human traffic lines in the plurality of divided spaces; Detecting a space occupancy state by a person from a sensing unit installed at each node of the topology; An information collecting step for collecting sensing information from the sensing unit; A movement calculation step of determining a movement state of a person based on the collected sensing information and neighbor node information of the topology; A space occupancy calculation step of determining a current space occupancy amount by adding or subtracting a space occupancy amount based on the collected sensing information and the movement state of the person; And A timer setting step of setting a timer for a predetermined period according to the node characteristics whenever the space occupancy state is detected by the sensing unit for each space divided for determining the occupancy movement state, In the storing of the topology, the topology is classified and stored hierarchically from the start node to the end node of the copper line, and each node is classified and stored according to spatial characteristics. The moving operation may further include returning the space occupancy state to the idle state for the specific space if the space occupancy state is not detected by the sensing unit until the timer expires for the specific space. How to detect space occupancy. The method of claim 9, Setting a timer E * for each space according to the node characteristics to determine a space occupancy for a specific space; If the space occupancy state is detected by the sensing unit prior to the expiration of the timer E *, further comprising a timer updating step of updating the timer E * longer How to detect space occupancy. The method of claim 10, Setting a timer U if the space occupancy state is not detected from the sensing unit until timer E * expires, The space occupancy calculation step, Maintaining a space occupancy rate when a space occupancy state is detected from the sensing unit before the timer U expires; And If the space occupancy state is not detected from the sensing unit until the timer U expires, determining the space occupancy number as 0 and updating the timer E * to a shorter time. How to detect space occupancy. The method of claim 11, The timer E *, As space occupancy increases, How to detect space occupancy.

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