KR102071180B1 - Smart sensor for energy control of buildings - Google Patents

Abstract

The present invention relates to a smart sensor for controlling energy of a building, which provides an energy saving effect. The smart sensor for controlling energy of a building of the present invention comprises: a communication unit for communicating with other devices; a sensor unit including first and second sensors; a control unit for controlling a communication unit; and a storage unit for storing an infrared sensing model and a microwave sensing model.

Description

Smart Sensors for Energy Control in Buildings {SMART SENSOR FOR ENERGY CONTROL OF BUILDINGS}

The present invention relates to a building control system. More specifically, the present invention relates to a system including a device such as a sensor, an IoT switch, an IoT outlet, and the like for a system for providing energy efficiency as well as efficiency of building management and convenience of use of a building. Furthermore, the present invention relates to a comprehensive building energy management system that prevents initial fire as well as energy management.

Building energy management system installs sensors and measurement equipment in the building's facilities such as lighting, cooling and cooling facilities, ventilation equipment, and outlets, and monitors power consumption by energy source or use in real time by connecting with communication network and collects collected energy usage information. A system that analyzes software and automatically controls equipment.

Such building energy management system is promoted by national policy for energy saving and efficient energy management. If a conventional building management system has stayed at the simple condition monitoring of various equipments, for example, whether the equipment is in normal operation and controlling the equipment in a fragmented manner, the recent building energy management system has been applied to the facilities related to building energy. Differences are aimed at optimizing operating conditions by analyzing information collected by integrating information and communication technology and automatically controlling equipment.

Korean Unexamined Patent Publication 10-2013-0082668 (2013.07.22)

An object of the present invention is to provide a control function of the building to detect the fire, control the power of the building by using a sensor node including a fire detection and / or room detection function in the building control system.

An object of the present invention is to provide a building management system that can determine the presence of a person using a combination of an infrared sensor and a microwave sensor to reduce the possibility of error, and increase the reliability of the entire system. Furthermore, an object of the present invention is to provide a security function together with an energy saving effect by judging the loss and / or intrusion of a person using a plurality of sensor information. According to this, even in a small building that is not equipped with a separate security system can provide a control function as well as energy saving.

In another aspect, the present invention is to detect the human body in the state of waiting and predicting the human body in consideration of the moving direction and the speed of the user passing through the human body sensing device, it is another object to quickly and accurately detect the human body.

Another object of the present invention is to provide a new user experience to a user by allowing a plurality of sensing devices to operate in conjunction with each other. In addition, another object of the present invention is to minimize the energy consumed to drive the human body sensing device.

According to an embodiment of the present invention, a sensor node for detecting a person's room includes a communication unit for communicating with another device;

A sensor unit including a first sensor for sensing the occupancy of a person in the installed space and a second sensor for detecting the occupancy of the person in the space on a principle different from that of the first sensor; And a controller configured to control the communication unit to transmit a control signal to another preset device when the loss of a person is detected. And a storage unit storing an infrared sensing model for a person and a microwave sensing model for a person, wherein the microwave sensing model collects a large amount of microwave sensor data for each object and clusters sensor data for each object, and a human object. A model refers to microwave sensor data included in a human object cluster within a distance from which a cluster and another object cluster are distinguishable. The infrared sensing model collects sensor data from an infrared sensor and then clusters the collected data, and a human object. Is a model representing infrared sensor data included in a human object cluster within a distinguishable distance from a cluster for another object. The controller is configured to collect the infrared sensor data when the infrared sensor data is collected in real time. If the distance between the sensor and the infrared sensing model is within a threshold, the detected object is determined to be a human object, and if it is outside the threshold, it is determined that the detected object is not a human object and corrects the sensing value of the first sensor. When the wave sensor data is collected, if the distance between the collected microwave sensor data and the microwave sensing model is within the threshold, the detected object is determined to be a human object. If it is outside the threshold, the detected object is determined to be not a human object. Correcting a sensing value of the second sensor, and OR operation of the corrected sensing value of the first sensor and the corrected second sensor to determine the occupancy of the human object, the sensor unit is provided in the body that can rotate left and right It is attached to the vertical rotation means rotates to the upper and lower left and right areas, the control unit, the movement is sensed through the first sensor, the second If the detected temperature change is greater than or equal to the reference value, it is determined that a human object exists in the space, and the storage unit stores position information of a plurality of other sensor nodes installed within a preset range, and the control unit is configured to store the first object at a first position. When the movement and temperature change of the human object is detected at one time point and the movement and temperature change of the human object is detected at a second time point later than the first time point at the second position, the human object moves from the first position to the second position. Determine the movement speed of the human object by using the time difference between the first view point and the second view point, calculate a movement direction vector of the human object by using the first position and the second position, A circle including the movement speed after designating another sensor node located on an extension line of the movement direction vector as a transmission target of a remote control signal The control signal is provided as a transmission target, and the activation time zone and the inactivity time zone are set by analyzing the result of determining that the human object exists in the space, and during the activation time zone, the first sensor and the second sensor are supplied with power, and the deactivation time is deactivated. During the time zone, when the first sensor detects the movement of the human object, the second sensor is controlled to operate the power supply. The body and the sensor unit rotate in the moving direction of the human object according to a movement analysis result of the human object. Control the vertical rotation means, and transmits a remote control signal including the movement direction of the human object to the other sensor node installed in the space corresponding to the movement direction of the human object by using the relative position information, the person from the other sensor node Upon receiving a remote control signal containing the direction of movement of the object, the person To use the direction of movement of the body toward the sensor portion the person object is characterized in that for controlling the body and the upper and lower rotating means.

According to the embodiment of the present invention, as well as the energy management of the building, it is possible to determine whether the building fire detection and intruders, there is an effect that can efficiently perform the building management.

More specifically, according to an embodiment of the present invention, since it is determined whether a person is occupied by using a combination of an infrared sensor and a microwave sensor, the possibility of error is lowered compared to using an infrared sensor or a microwave sensor, respectively. As a result, the reliability of the entire system can be increased. Furthermore, the building management system according to the embodiment of the present invention can determine the occupancy and / or intrusion of a person using a plurality of sensor information, thereby providing an energy saving effect and a security function. According to this, if the building management system according to the present invention is installed in a small building that is not equipped with a security system separately, it can provide an energy saving function as well as a control function.

Furthermore, according to an embodiment of the present invention, since it is determined whether or not a fire occurs by using a flame detection sensor that detects the fire at the flame wavelength at the start of the fire, it is possible to detect the initial fire before the conventional fire detector operates. It is effective to prevent fire more effectively. According to this, if the building management system according to the present invention is installed in a small building that is not equipped with a fire detection system separately, it is possible to provide a fire detection function as well as an energy saving function and a control function with high reliability. Furthermore, according to the embodiment of the present invention, the building management system according to the embodiment of the present invention can be built at a low cost without the need to add a separate facility to the conventional building. That is, the building management system according to the embodiment of the present invention can be applied to any building regardless of building design regulations, building scale, and can be compatible with the conventional system.

In addition, according to the present invention, by considering the direction and speed of the user's movement through the human body sensing device, the human body can be detected in a state in which the human body is detected and waiting, thereby quickly and accurately detecting the human body.

In addition, according to the present invention, a plurality of sensing devices may operate in association with each other to provide a new user experience to a user.

In addition, according to the present invention it is possible to minimize the energy consumed to drive the human body sensing device.

1A is a view for explaining the configuration of a building management system according to an embodiment of the present invention.
1B is a block diagram illustrating an apparatus for detecting a human body according to an exemplary embodiment.
2 is a view for explaining a configuration of a human body sensing device according to an embodiment of the present invention;
3 is a view for explaining the operation of the human body sensing device according to an embodiment of the present invention;
4 is a flowchart illustrating a method of operating a human body detecting device according to an embodiment of the present invention.

It is apparent that the present invention is not limited to the description of the embodiments described below, and various modifications may be made without departing from the technical scope of the present invention. In describing the embodiments, descriptions of technical contents which are widely known in the technical field to which the present invention belongs and are not directly related to the technical gist of the present invention will be omitted.

On the other hand, the same components in the accompanying drawings are represented by the same reference numerals. In the accompanying drawings, some components may be exaggerated, omitted, or schematically illustrated. This is to clarify the gist of the present invention by omitting unnecessary description that is not related to the gist of the present invention. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1A is a view for explaining the configuration of a building management system according to an embodiment of the present invention.

Building management system according to an embodiment of the present invention is a smart switch (15, 25) to control the on and off of at least one or more lights in communication with the plurality of sensor nodes (10, 20) the sensor node, as shown in Figure 1a May include a smart outlet 17, 27 for controlling the on and off of the power supply of the plug.

Furthermore, the building management system according to the embodiment of the present invention has a gateway 30 for transmitting sensing information and power usage information to the building control rooms 60, 70, 75, as illustrated in FIG. 1A. 75 and user terminals 40 and 45 displaying fire notification and energy monitoring information.

More specifically, the sensor nodes 10 and 20 according to the embodiment of the present invention include at least one sensor, and a plurality of sensor nodes are installed on the ceiling of each room of the building.

The first sensor node 10 according to an embodiment of the present invention may include a first sensor for determining the occupancy of a person and a second sensor for detecting a fire in an installed space.

The first sensor node according to an embodiment of the present invention may include a microwave motion sensor module to determine the occupancy of the person. The microwave motion sensor module may form an antenna transmitter and an antenna receiver in one module to identify an object using a Doppler effect, in which a frequency of reflected waves changes depending on a relative speed of a reflector when microwaves are reflected on an object. .

For example, the microwave motion sensor module may directly receive the reflected wave of the emitted microwave and compare the transmission / reception frequency to detect the sensing object. That is, the first sensor node 10 according to the embodiment of the present invention may detect whether or not a person is occupied by oscillating a high frequency to be administered to an object and sensing energy returned.

The microwave motion sensor is sensitive to the ambient temperature and ambient noise due to the sensing method, and has a long range sensitivity. In particular, compared to the infrared sensor is not affected by the ambient temperature, even if there is an obstacle between the sensor and the object has the advantage that there is no problem in object recognition. Furthermore, far-field objects have better recognition rate than infrared sensors.

However, the microwave motion sensor detects the movement of an object and thus cannot distinguish only a person, and there is a problem in that an object is malfunctioned when an object moves, such as an operation of a propeller of a fan or a fan, rotation of an air conditioner, movement of a vehicle, or movement of an animal.

On the other hand, the second sensor node 20 according to an embodiment of the present invention can detect the human room in a manner different from the first sensor node, for example, by sensing the infrared wavelength emitted by the person.

However, since the infrared sensor detects the heat of the object, there is a problem of malfunctioning with a heating element such as an air conditioner outdoor unit, and there is a problem that the remote sensitivity is not detected and there is an obstacle.

In order to solve such a problem, according to an exemplary embodiment of the present invention, a person's room can be sensed using the microwave reflection wave frequency sensing value together with the infrared sensing value. If the difference is different, the probability of error is lowered and the reliability of the entire system is higher than that of detecting the loss using only one sensor.

We note that the sensing values for humans and other heating elements in the infrared sensor differ in data form. Therefore, it collects a large amount of infrared sensor data by object in various situations and, unlike other objects, constructed an infrared sensor model for human.

More specifically, a system according to an embodiment of the present invention collected sensor data from an infrared sensor, including information about a target object, and clustered the collected data. Furthermore, a distance distinguishable between a cluster for a human object and a cluster for another object is set, and a model representing infrared sensor data included in the human object cluster within the distance, that is, an infrared sensor model for a human object is configured.

The infrared sensor model for the human object may be used to correct the sensing value of the second sensor node according to an embodiment of the invention. For example, an infrared sensor model for the human object is stored in the second sensor node, and when sensor data is collected in real time at the second sensor node, the sensor is detected when the distance between the collected sensor data and the sensor model is within a threshold value. If the detected object is outside the threshold, the detected object may be determined not to be a human.

When the infrared sensor model for the human object is applied, the sensing result of the infrared sensor may be corrected as shown in Table 1 below.

Target object Sensing result of infrared sensor (before correction) Model applied (after correction) Person T T Heating object T F Non-heating object -(Not detected) -(Not detected) A remote person -(Not detected) -(Not detected) Man behind an obstacle -(Not detected) -(Not detected)

According to Table 1, it can be seen that the malfunction of the heating object of the infrared sensor is solved. However, the problem of the infrared sensor not recognizing a person far or behind an obstacle is not solved. On the other hand, we note that the microwave motion sensor also has different data types for human and other moving objects. Therefore, under various circumstances, a large amount of microwave sensor data for each object is collected, including information about the target object, the sensor data for each target object is clustered, and the distance between the human object cluster and another object cluster can be set. Within this time, a model representing microwave sensor data included in a human object cluster, that is, a microwave sensor model for a human object is constructed.

The microwave sensor model for the human object may be used to correct the sensing value of the first sensor node according to an embodiment of the invention. For example, the microwave sensor model for the human object is stored in the first sensor node, and when sensor data is collected in real time at the first sensor node, if the distance between the collected sensor data and the sensor model is within a threshold value The detected object may be determined to be a person, and if it is outside the threshold, it may be determined that the detected object is not a person.

When the microwave sensor model is applied to the human object, the sensing result of the microwave motion sensor may be corrected as shown in Table 2 below.

Target object Sensing result of microwave sensor (before correction) Model applied (after correction) Person T T Moving object T F A stationary object - - A remote person T T Obstacle man T T

According to Table 2, it can be seen that the malfunction of the moving object of the microwave motion sensor is solved. Therefore, even the microwave motion sensor can recognize even the people far behind and obstacles can greatly improve the accuracy of the sensor node. However, there is still a possibility of malfunction for a person who is not moving. Therefore, according to the exemplary embodiment of the present invention, the sensing value is corrected using an infrared sensor model and a microwave sensor model of a human object, and the corrected value is calculated to improve the recognition rate of the human body. More specifically, according to an embodiment of the present invention by applying an infrared sensor model for a human object to correct the infrared sensing value, by applying a microwave sensor model for the human object to correct the microwave sensing value, the corrected value OR operation improves the recognition rate of human detection. The result is shown in Table 3 below.

Target object Sensing result of infrared sensor (before correction-after correction) Sensing result of microwave sensor (before correction-after correction) OR operation Person T-> T T-> T T Moving object (non-heating) - T-> F F Immovable object (fever) T-> F - F A remote person - T-> T T Obstacle man - T-> T T

According to Table 3, it can be seen that all the disadvantages of the microwave motion sensor and the infrared sensor are solved. That is, moving objects, heating objects, people in the distance, people behind obstacles can be completely distinguished, and the human recognition rate can be confirmed to be greatly improved. Furthermore, since the building management system according to the embodiment of the present invention can accurately determine whether a person is occupied using a plurality of sensors, the present invention has an effect that can be used as a control device. For example, if a person's occupancy is detected at a preset time such as a weekend or a night, an alarm may be transmitted to the administrator's smartphone. A more detailed description of providing a control function to a building according to an embodiment of the present invention will be described later.

Furthermore, the first sensor node 10 according to the embodiment of the present invention may include a flame detection sensor module to detect a fire in the installed space. For example, the flame detection sensor module may detect the flame by detecting a combination of ultraviolet wavelength characteristics (185 nm to 260 nm) and / or infrared wavelength characteristics (4.3 μm ± 0.2 μm) emitted from the flame. Since the flame detector according to the embodiment of the present invention detects only the narrow wavelength band as described above, it is possible to prevent malfunctions from various light sources in the surroundings. Conventional fire detectors have not detected the initial fire, but the building management system according to an embodiment of the present invention is effective in the initial response to the fire because it can detect the flame wavelength region of the initial fire.

Furthermore, as shown in FIG. 1A, the building management system according to an exemplary embodiment of the present invention is excellent in fire detection because fire detection is possible only by installing a sensor node equipped with a flame detection sensor module in each room of a building. Can provide compatibility

That is, according to the embodiment of the present invention, a fire protection system may be installed in any type of building, that is, an old building to which building regulations according to the fire laws are not applied, and furthermore, it is independent of a fire detection system conventionally installed in a large building. In addition to being able to be provided as a sub-operating subsystem, there is the effect of building a fire detection system at a minimal cost in a small building.

Furthermore, the second sensor node 20 according to the embodiment of the present invention may include a third sensor for determining the occupancy of the person, and a fourth sensor for detecting the illuminance of the installed space.

The detection of the occupancy of the second sensor node 20 is appropriate to determine the occupancy of a person on a principle different from that of the first sensor node 10 described above. This is because the first sensor node 10 and the second sensor node 20 are installed together in one space, and if the user's room can be detected in a different way, the probability of error of the room detection error of the entire system can be lowered.

For example, the second sensor node 20 may determine a person's occupancy using a passive infrared sensor (PIR sensor) module. However, the infrared passive sensor module is excellent in detecting the human body due to the characteristic of the sensing method that detects a difference from the ambient temperature, but the sensitivity decreases as the distance increases, and there is a problem of being affected by the surrounding environment such as sudden temperature change and disturbance light. .

Therefore, according to an embodiment of the present invention, there is a feature of using multiple sensors to more accurately determine the human room. More specifically, a plurality of sensor nodes according to the embodiment of the present invention are installed in the same space, the infrared sensor module included in the microwave sensor module included in the first sensor node 10 and the second sensor node 20. You can determine the person's room by using.

The microwave sensor has a good long-range sensitivity because there is no malfunction due to ambient temperature or ambient noise. However, since it is impossible to distinguish and detect only humans, using it with an infrared passive sensor can reduce the malfunction range. Infrared passive sensor is affected by the surrounding environment, there is a problem that the remote sensitivity is inferior, but there is an advantage suitable for human body detection.

A method of determining a person's occupancy using an infrared sensor and a microwave sensor may consider the following embodiments.

First, even if only one of the two sensors operating is determined to be a room. This has the effect of increasing the security reliability if applied to a security system that determines that the intrusion into the building when a person's room is detected at a predetermined time.

Secondly, it is necessary to operate both sensors in order to judge the room. This can be applied to an energy management system that cuts off the power of electrical equipment such as pre-connected lights if there is no person, that is, if the person is not occupied, which can reduce the error of the detection of the room and save energy efficiently. It works.

On the other hand, the building management system according to an embodiment of the present invention can determine the occupancy using any algorithm if it is possible to accurately determine the occupancy of the person using a plurality of sensor values. That is, it should be noted that the present invention cannot be interpreted limited to a specific algorithm that determines the quality of a person by combining sensing information.

Furthermore, the second sensor node 20 according to the embodiment of the present invention may include an illuminance sensor module for detecting the illuminance of the installed space. The illuminance sensor module may operate by changing the value of the internal resistance according to the amount of light. According to an embodiment of the present invention, when light is detected in the illuminance sensor module more than a preset range, the energy of the building is managed by not transmitting a control signal to the smart switch even if a human motion is detected at the sensor node because it is daylight. can do.

Furthermore, the sensor node 10, 20 according to the embodiment of the present invention is a microcontroller module for controlling the current supply of the smart switch (15, 25) and the smart outlet (17, 27) according to the occupancy of the person and the smart switch And a communication module for transmitting a control signal to the smart outlets 15 and 25 and the smart outlets 17 and 27.

For example, sensor nodes 10, 20 may include short range wireless communication modules and / or wired communication modules, and may transmit control signals to smart switches 15, 25 and smart outlets 17, 27.

Furthermore, in the example of FIG. 2, the sensor nodes 10 and 20 and the smart switches 15 and 25 may be connected by wire. This is to provide system compatibility for conventional buildings. That is, the legacy switch installed in the conventional building only controls the power supply of the lighting and does not consume extra power, and thus the power line may not be connected. The smart switch according to the embodiment of the present invention includes a controller unit and a communication module and requires an independent power supply. Therefore, the building management system according to the embodiment of the present invention is implemented to connect the sensor node and the smart switch by wire when installing the sensor node in a conventional building and replacing the legacy switch with the smart switch according to the embodiment of the present invention. . According to this method, a smart switch can operate together with a sensor node in a conventional building.

Meanwhile, in the example of FIG. 1A, the sensor nodes 10 and 20 are illustrated as plural, but this is merely an example. According to another embodiment of the present invention, a plurality of sensors for determining the occupancy of the person in one sensor node, a sensor for detecting the illuminance of the installed space, and a sensor for fire detection may be installed.

Meanwhile, according to another embodiment of the present invention, the sensor nodes 10 and 20 may further include a security module that provides a hardware-based security function to enhance security of the IoT facility.

Furthermore, the building management system according to the embodiment of the present invention may control the at least one or more lights on and off, and may include a smart switch (15, 25) capable of setting the state in the automatic mode, manual mode or security mode.

For example, if a person's occupancy is detected at the sensor nodes 10 and 20, the sensor nodes 10 and 20 transmit control signals to the smart switches 15 and 25, and the smart switches 15 and 25 are connected. The lights can be turned on. Then, when the absence of a person is detected at the sensor nodes 10 and 20, the sensor nodes 10 and 20 transmit control signals to the smart switches 15 and 25, and the smart switches 15 and 25 turn on the lights. Can be turned off.

On the other hand, the smart switch (15, 25) according to an embodiment of the present invention can set the state in the automatic mode, manual mode, or security mode. The automatic mode refers to a state in which the on / off of the lighting is controlled according to the signals of the sensor nodes 10 and 20 without a user input to the switch. In other words, the light is turned on when a person is occupied, and the light is turned off when a person is not detected. In the manual mode, the user input is controlled regardless of the occupancy of the room to control the on / off of the lighting. In the security mode, when a person's occupancy is detected at a preset time, an alarm is generated.

More specifically, the smart switch 15, 25 according to the embodiment of the present invention may include a power supply unit, a communication unit, a state setting unit, a switch unit, a power use detection unit, and a display unit. The power supply unit of the smart switch 15, 25 according to the embodiment of the present invention may serve to supply power to each module of the smart switch. More specifically, the power supply unit may be wired to the main power line of the building to supply power supplied from the main power line to each module of the smart switch.

However, the legacy switch installed in a conventional building only controls the power supply of lighting, and does not include a microprocessor or a communication module, and thus does not need to be supplied with a separate power. Therefore, at the time of building design, the power line for supplying power to the switch may not be connected.

However, the smart switch according to the embodiment of the present invention may include a controller unit and a communication module and may require an independent power supply. Therefore, the power supply unit of the smart switch (15, 25) according to an embodiment of the present invention can be implemented to be connected to the other device by wire, to receive power from the other device. For example, when a sensor node for detecting a person's occupancy is installed on the ceiling of each room of a building, the sensor node and the smart switch may be connected to a power line, so that power of the smart switch may be supplied from the sensor node. .

Furthermore, in the smart switches 15 and 25 according to the embodiment of the present invention, the communication unit may play a role of transmitting and receiving data to and from another device.

For example, the communication unit may include a short range wireless communication module to connect communication with sensor nodes installed with the smart switches 15 and 25 and to transmit and receive data.

For example, a sensor node installed in a space such as a smart switch may include an occupancy sensing sensor module for sensing a person's occupancy. When a person's occupancy is detected at the sensor node, for example, a control signal for turning on any lighting may be transmitted to the smart switch.

The smart switch may receive the control signal through the communication unit and supply power to a light connected to the smart switch, for example. As another example, when a person's exit from the sensor node is detected, the sensor node may transmit a control signal for turning off the light to the smart switch, and the smart switch receives the control signal through the communication unit 20. Thus, the power supply to the lamp can be stopped.

On the other hand, the communication unit in the smart switch (15, 25) according to an embodiment of the present invention has been described on the assumption that it provides a wireless communication function, the present invention is not limited to this. That is, the smart switches 15 and 25 according to the exemplary embodiment of the present invention may transmit and receive data with the sensor node through wired communication as well as wireless communication, and the communication unit may be interpreted as a communication interface including at least one port. have.

Meanwhile, the smart switches 15 and 25 according to the embodiment of the present invention may include a switch unit. The switch unit may include a plurality of switch modules that are responsible for turning on and off each of the lights to control the on and off of a plurality of lights installed in the corresponding space through a single switch device.

For example, the switch unit may include a first switch module for controlling the first lighting, a second switch module for controlling the second lighting, and / or a third switch module for controlling the third lighting, and the user may set the state setting unit. The status can be set independently for each switch module.

In particular, the smart switch (15, 25) according to an embodiment of the present invention includes a state setting unit, characterized in that through the state setting unit can independently set the state of the plurality of switch modules included in the switch unit. More specifically, the state of each switch module of the state setting unit may be set to an automatic mode or a manual mode. The automatic mode refers to a state in which lighting is turned on or off according to a signal of an external device, for example, a sensor node, without a user input to a switch. In other words, when a person's room is detected, the corresponding lighting is turned on, and when the person's absence is detected, the lighting is turned off. The manual mode is a state of controlling the on / off of the light by receiving a user input in the same manner as the conventional switch, apart from the occupancy detection.

Meanwhile, according to a further embodiment of the present invention, the state setting unit may set the state of the smart switch to the security mode. In the crime prevention mode, when a person's loss is detected at a preset time, an alarm is generated.

The user may set the states of the plurality of switch modules included in the switch unit to the automatic mode or the manual mode, respectively, through the state setting unit.

According to a preferred embodiment of the present invention, it is appropriate that the state setting unit is not exposed to the outside of the smart switch in order to prevent any manipulation of an unauthorized user. To this end, the casing of the smart switch may include a cover for preventing external exposure of the state setting unit.

For example, a smart switch including at least one switch module for controlling on / off of a connected light includes: a manual button unit formed for each of the switch modules to receive a user input for operating the switch module, the switch module An LED formed for each of the switch modules to indicate an on-off state of the lighting connected to the setting unit; a setting unit formed for each of the switch modules to receive a user input of setting each of the switch modules to an automatic mode or a manual mode, the It is coupled with a PCB module including a casing, the casing and the switch module including a first opening for forming a button portion and a second opening for forming the state setting portion, and for attaching the smart switch to a wall of a building. The frame is formed above the second opening It may include a protective cover for preventing the exposure of the state setting unit.

For example, of the two lights installed in a space, the first light is a central light, and on / off is appropriately controlled depending on whether or not a person is occupied. The second light is a light located near a window. It may be considered where it is appropriate for the off to be controlled. In this case, the smart switch may independently set the operation of the first light and the second light.

For example, the user may open the protective cover formed on the casing of the smart switch, set the state of the first light to the automatic mode through the input device provided by the setting unit, and set the state of the second light to the manual mode. have. The input device may protrude from the wall, and may be set to an automatic mode when the user pushes the protrusion to one side and a manual mode when the user pushes the protrusion to one side. When the lighting state is set through such an input device, the first light is turned on when a person's occupancy is detected at the sensor node, and is turned off when a person's exit is detected, but the second light is conventionally irrespective of whether a person is occupied or not. It will be turned on and off in the same way as the legacy switch.

According to this, since the states of the plurality of switch modules can be set independently, there is an effect of increasing the efficiency of energy management of the building. That is, not only can the user control the on / off of the lighting depending on whether the person is occupied, but also the user can manually set the lighting on / off as needed, thereby increasing user convenience. For example, if any area of the building that is not divided by a wall is not a work space, the lighting installed in the area would be efficient to be manually turned on or off regardless of whether or not a person enters the room.

On the other hand, the smart switch 15, 25 according to an embodiment of the present invention may include a power use detection unit. The power use detection unit may perform a function of collecting information on power use of a light connected to the smart switch.

For example, a case may be considered in which a smart switch according to an embodiment of the present invention controls on / off of a total of three lights. At this time, the power use detection unit detects the operation of the first switch module connected to the first light, the second switch module connected to the second light, and the third switch module connected to the third light, and when each switch module is turned on The amount of power and time information supplied to the lighting can be collected. The collected power usage information may be transmitted to the central control device through the communication unit.

On the other hand, the smart switch according to an embodiment of the present invention may include a status display. The display unit may include an LED module and may perform a function of displaying the operation or status of the smart switches 15 and 25.

For example, when the first light connected to the first switch module is turned on, the display unit may display a blue light through an LED located near the first switch module. As another example, when the second light connected to the second switch module is turned off, the display unit may display a red light by changing an LED color located near the second switch module.

Furthermore, the display unit may display respective setting information when the state of the smart switch is a full automatic mode, a partial automatic mode, a partial manual mode, a full manual mode, and a security mode.

On the other hand, the smart switch according to an embodiment of the present invention may further include a speaker unit. The speaker unit may be omitted depending on the implementation in an arbitrary configuration. For example, the speaker may generate a sound to provide an alarm. For example, if a person's room is detected at the sensor node at a preset time, the speaker unit may generate an intrusion prevention alarm.

Furthermore, the building management system according to the embodiment of the present invention may include at least one plug, and may include a smart outlet (17, 27) for controlling the on and off of the power supply of the plug according to the presence of a person.

For example, if a person's occupancy is detected at the sensor node 10, 20, the sensor node 10, 20 transmits a control signal to the smart outlet 17, 27, and the smart outlet 17, 27 is connected. Power can be supplied to the plug. Then, when the absence of a person is detected at the sensor nodes 10 and 20, the sensor nodes 10 and 20 transmit control signals to the smart outlets 17 and 27, and the smart switches 15 and 25 supply the power. You can stop.

Meanwhile, in the example of FIG. 1A, the sensor nodes 10 and 20 and the smart outlets 17 and 27 are shown as separate physical devices, but this is merely an example. According to an embodiment of the present invention, the function of the sensor nodes 10, 20 can be performed in the smart outlets 17, 27, in which case the sensor nodes 10, 20 can be omitted.

For example, the smart outlets 17 and 27 may include a proximity sensor module. When a person enters the smart outlet within a preset range, the power supply is supplied to the plug. When the proximity of the person ends, the power supply is supplied to the plug. It may be implemented to abort.

Furthermore, the smart switch 15, 25 and / or smart outlet 17, 27 according to an embodiment of the invention comprises a communication module for communicating with an external device, a power monitoring module for monitoring power consumption, and a memory. It may include a microcontroller module.

For example, in the smart switch 15, 25, the power monitoring module can record the power consumption information of the lighting connected with the time information, and in the smart outlet 15, 25, the power monitoring module is plugged with the time information. The power consumption information of the load can be recorded. Power monitoring information generated by the power monitoring module of each device may be transmitted to the control room (60, 70, 75) through the gateway 30 at a predetermined period.

On the other hand, the building management system according to an embodiment of the present invention may include a gateway (30). The gateway 30 stores the sensing information collected by the sensor nodes 10 and 20 and the power usage information collected by the smart switches 15 and 25 and the smart outlets 17 and 27 in the building control room 60, 70, 75. It can perform the function of sending to.

Furthermore, the building management system according to the embodiment of the present invention may include control rooms 60, 70, 75 as shown in FIG. 1A. In the example of FIG. 1A, the control room is shown to include a plurality of servers 60, 70 and a reservoir 75, but this is only an example. According to another embodiment of the present invention, the central control room may be implemented on a cloud basis, in which case the function of the control room may be provided in software.

The control room may include a building energy monitoring and control server 60. The energy monitoring server 60 receives power consumption information from a power monitoring module installed in a facility of a building such as a lighting, air conditioner, ventilation equipment, and an outlet, and analyzes the collected energy usage information through software and automatically controls the equipment. Function can be performed.

For example, the energy monitoring server 60 generates an energy consumption monitoring report at predetermined intervals, integrates the monitoring information, suggests an optimized facility operation, or provides an alarm to an administrator when an abnormal state of power consumption is monitored. can do.

For example, the energy monitoring server 60 may generate an energy monitoring report including trends of uptime, power consumption, energy efficiency, energy cost and power consumption of each facility. Furthermore, when an abnormal state is detected, an alarm may be provided to the administrator's smartphones 40 and 45.

In addition, the control room may include a central control server (70). The control server 70 may receive information on whether a person is occupied and whether or not a fire has occurred from the sensor node, analyze the collected control information through software, and provide an alarm for dangerous sulfur. have. For example, the control server 70 may provide an alarm to the manager's smartphones 40 and 45 when a person's occupancy is detected or a fire is detected at a preset time.

1B is a block diagram illustrating a human body sensing device according to an embodiment of the present invention, and FIG. 2 is a diagram illustrating a human body sensing device according to an embodiment of the present invention. 1B and 2 illustrate an embodiment when the sensor node of FIG. 1 is implemented as a human body sensing device. 1B and 2, the apparatus 100 for detecting a human body according to an exemplary embodiment may include a sensor unit 110, a detector 130, an analyzer 150, a controller 160, and a power controller 170. ) May include a communication unit 180 and a storage unit 190.

The sensor unit 110 may include a first sensor 113 for detecting a movement of an object using microwaves reflected from an arbitrary object and a second sensor 115 for detecting a temperature change of a space using infrared rays emitted from the object. It may include. The first sensor may be a microwave sensor and the second sensor may be a PIR sensor. The second sensor may include an optical device (lens or mirror) or the like for focusing the infrared rays emitted by the object to widen the detection area and increase the sensitivity.

The sensor unit 110 including the first sensor 113 and the second sensor 115 may be attached to the vertical rotation means 105 provided in the body 103 which may rotate left and right, and may rotate all the top, bottom, left, and right areas. have. The direction of the sensor unit 110 may be determined according to a control command of the controller 170 and may change in real time.

The detection unit 130 may determine that the user exists in the space when the movement is detected through the first sensor and the temperature change detected by the second sensor is equal to or greater than the reference value. That is, since the present invention senses the human body in consideration of movement as well as temperature change, it is possible to effectively solve the problem of malfunction when the PIR sensor alone is used, in which the sensitivity rapidly decreases when the ambient temperature of the sensor rises.

The analyzer 150 may analyze the movement direction of the object by using the movement and the temperature change detected at the first time point and the second time point. For example, referring to FIG. 3, when a movement and temperature change of an object are detected at <A> at a first time point, and a movement and temperature change at an object is detected at <B> at a second time later than the first time point. The user may determine that the user moves from <A> to <B>. The analyzer 150 may calculate the movement direction vector of the object using the position of <A> and the position of <B> where the object movement is detected, and may detect another human body detecting device located on an extension line of the movement direction vector of the object. The data may be searched by the storage 190 and may be designated as a transmission target of a remote control signal.

Furthermore, the analyzer 150 may measure the moving speed of the object by using the movement and the temperature change detected at the first time point and the second time point. This can be measured by using the time difference between the positions A and B and the first time point and the second time point. The moving speed of the object calculated by the analyzer 150 may be included in a remote control signal transmitted to another human body detecting device.

The controller 160 may control the body and the vertical rotation means such that the sensor unit 110 rotates in the moving direction of the object according to the analysis result of the object moving direction of the analyzer 150. For example, referring to FIG. 3, when movement and temperature change are detected in <A> and <B>, the analyzer 150 analyzes the moving direction of the object in the right direction, and accordingly, the controller 160 The body 103 may be rotated or the vertical rotation means 105 may be rotated so that the sensor unit 110 may rotate in the right direction. Therefore, if the area that can be sensed by the conventional sensor corresponds to the hatched portion 10a, the area that can be sensed is widened to 20a as the sensor unit 110 rotates to the upper right side. Therefore, according to the present invention, the area for detecting a human body is widened to provide a more detailed user experience in providing a function that can be provided to a user through human body detection, such as: auto-lighting and air conditioning control using physical room detection. In addition, when the device needs to be attached to a large space, the number of devices can be reduced.

Meanwhile, the controller 160 transmits a remote control signal including a moving direction of the object to a human body detecting device installed in a space corresponding to the moving direction of the object by using the relative position information, and transmits the first object from another human body detecting device. Upon receiving the remote control signal including the movement direction, the controller 160 may control the body and the vertical rotation means so that the sensor unit faces the first object by using the movement direction of the first object. For example, assume that the human body detecting apparatus 100b receives a remote control signal including the moving direction of the object shown in FIG. 3 from the human body detecting apparatus 100a. The controller of the human body detecting apparatus 100b rotates the body 103 and the vertical rotation means 105 such that the sensor unit faces the person located in <B> using the direction of movement of the object moving from <A> to <B>. You can. That is, the sensor unit 110 of the human body sensing device 100b may rotate in the current position direction (left direction) of the person approaching the device 100b. Assuming that the body 103 and the vertical rotation means 105 has rotated at the maximum angle supported, the area that the sensor unit can sense in FIG. 3 is the <C> area, and the device 100b is located in the <C> area. As the object can be detected the moment it enters, the human body detection can be performed more quickly and accurately and the malfunction can be reduced. If the human body detecting device 100b is associated with the autowriting device, the lighting is activated as soon as the human (object) enters the area <C> even if the person (object) does not enter the area 10b which is very close to the device 100b. Thus, the user of the device can provide a user experience as if the device is expected to operate as if the device is to enter the area.

The sequential sensing (operation) results of the plurality of human body sensing devices are transmitted to the server, and may be used to identify an operation pattern over time. For example, the server may learn the time series motion patterns of the human body sensing devices using the time series motion data of the human body sensing devices including 100a-> 100c-> 100f or 100a-> 100b, and detect a plurality of human body. An operation pattern model of the device may be generated. The learned operation pattern model may be used for power control of the human body sensing device group. For example, in the space of FIG. 3, if a motion pattern that extends from 100a to 100b in a specific time zone X occupies a ratio above a threshold, the server may designate 100a and 100b as an activation device, and the first device of the activation device at a specific time zone X. The sensor and the second sensor can always operate (powered). However, 100c and 100d that are not designated as an activation device in a specific time zone X may be set to operate only the first sensor. Therefore, only one sensor may operate in both devices, thereby saving energy in time zone X.

The feature of the present invention is different from simply rotating the sensor unit in the human body sensing device. According to the present invention, each human body sensing device 100a to 100d may exchange information with each other, and a plurality of different human bodies may be installed within a preset range. By using relative position information of the sensing device, the human body sensing device which is likely to operate at a next time point may be sensitively operated, thereby improving energy efficiency of the entire plurality of human sensing devices.

In this regard, the power controller 170 supplies power to the first sensor and the second sensor when receiving a remote control signal from another human body sensing device, and supplies power to the first sensor when the remote control signal is not received. When the second sensor detects the movement of the object, the power supply may be controlled to operate the second sensor. In other words, the use of only one sensor is less accurate but energy is reduced, the use of both sensors increases the sensitivity and accuracy, but the energy is used a lot, the present invention is likely to operate after the present time Only by allowing it to operate sensitively, other human body sensing devices can be unnecessarily consumed.

In another embodiment, the power control unit 170 analyzes the determination result of the detection unit 130 to set the activation time zone and the inactivity time zone, supply power to the first sensor and the second sensor during the activation time zone, When the first sensor detects the movement of the object, the power supply may be controlled to operate the second sensor. Here, the activation time zone may be a time zone in which the number of object detections is less than a preset minimum value, and the inactivation time zone may be a time zone in which the number of object detections exceeds a minimum value. Analysis of the determination result of the detection unit 130 and setting of the time zone may be performed by the power control unit 170. Can be done on the server. When the analysis and the time zone are set in the server (not shown), the server may collect and store the determination result of the detection unit 130 to use for analysis. The server may transmit the time zone setting value according to the analysis result to the power control unit 170, and the power control unit 170 may control the power supply using the received time zone setting value.

The communication unit 180 may transmit the determination result of the detection unit 130 to a pre-connected device or server. The pre-connected device may be a plurality of other human body sensing devices, and may be an occupancy sensing system, a lighting control system, a building control system, an air conditioning system, or the like that utilizes human body sensing information. The communication unit 180 includes a plurality of other human body sensing devices, terminals, electronic devices, or servers installed within a predetermined range, and includes Bluetooth, RFID (Radio Frequency Identification), Infrared Data Association (IrDA), and UWB (Ultra Wideband). ), ZigBee, Near Field Communication (NFC), Wi-Fi (Wireless-Fidelity), Wi-Fi Direct, etc. can be used to transmit and receive information.

The storage unit 190 is a module that stores location information of a plurality of other human body sensing apparatuses installed within a preset range. When the human body sensing apparatuses are installed as a group, the storage unit 190 according to a request of the analyzing unit 150 or the controller 160. The module may provide relative position information or absolute position information of the human body sensing devices.

4 is a flowchart illustrating a method of operating a human body sensing device and system according to an exemplary embodiment.

Referring to FIG. 4, a microwave in which a first sensor attached to a vertical rotation means provided on a body rotatable from side to side in a body detecting device 1 (hereinafter referred to as sensing device 1) installed in an arbitrary space is reflected from an arbitrary object. The motion of the object may be detected by using (S100), and the second sensor attached to the vertical rotation means may detect a change in temperature of the space by using infrared rays emitted from the object (S200). If the movement of the object is detected and the temperature change of the space is greater than or equal to the reference value, the sensing device 1 may determine that the user exists in the space (S400), and transmit the determination result to a pre-connected device or server (S500). Next, the sensing device 1 analyzes the moving direction of the object by using the movement and temperature change detected at the first time point and the second time point (S600), and according to the analysis result, the first sensor and the second sensor move direction of the object. The body and the vertical rotation means can be controlled to rotate (S630). The sensing device 1 not only controls its own module according to the moving direction of the object, but also another sensing device (detecting device 2) on the extension line of the vector corresponding to the moving direction, that is, the sensing device that is expected to detect the user. In step S650, the remote control signal including the movement direction information may be transmitted.

In another embodiment, the determination result in step 400 may be transmitted to the server (S500), and the server may analyze the moving direction of the object using the same (S730). Since the analysis of the moving direction requires a plurality of data, the server may also analyze the moving direction of the object by using the movement and temperature change detected at the first and second time points. Although the server may use a plurality of data collected by a single device, it is also possible to analyze the direction of movement using the data collected by the plurality of sensing devices. The server may transmit a remote control signal including the moving direction of the object according to the analysis result of the moving direction of the object (S750).

The sensing device 2 receiving the remote control signal controls the body and the vertical rotation means so that the first sensor and the second sensor included in the sensing device 2 face the oncoming object by using the moving direction of the object included in the remote control signal. Can be. That is, according to an exemplary embodiment of the present disclosure, the sensing device 2 may be in a standby state by pointing the sensor toward the user approaching itself, and when the user enters a detectable area, the human body may quickly detect a human body with high sensitivity in a wide range. It can be detected.

Meanwhile, in operation 500, the determination result of the sensing device 1 (the result determined by the user in the sensing area) may be transmitted to the lighting device 1 connected to the sensing device 1, and the lighting device 1 receiving the lighting device 1 may illuminate according to the determination result. Auto Lighting can be provided by turning ON / OFF. The electronic device connected to the sensing device is not limited to the lighting device, and any IoT system configuration device that utilizes human body sensing information such as a room detection system and an air conditioning system may be used as described above.

The embodiments of the present invention disclosed in the specification and the drawings are only specific examples to easily explain the technical contents of the present invention and aid the understanding of the present invention, and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention can be carried out in addition to the embodiments disclosed herein.

Claims (1)

In the sensor node that detects the loss of a person,
A communication unit for communicating with another device;
A sensor unit including a first sensor for sensing the occupancy of a person in the installed space and a second sensor for sensing the occupancy of the person in the space on a principle different from that of the first sensor; And
A control unit controlling the communication unit to transmit a control signal to another preset device when a person's loss is detected; And
A storage unit for storing an infrared sensing model for a person and a microwave sensing model for a person,
The microwave sensing model collects a large amount of microwave sensor data for each object, clusters sensor data for each object, and analyzes microwave sensor data included in a human object cluster within a distance that can be distinguished from a human object cluster and another object cluster. It's a model that means
The infrared sensing model refers to infrared sensor data that is collected in the human object cluster within a distance that clusters the collected data after collecting sensor data from the infrared sensor, and the cluster for the human object and the cluster for other objects can be distinguished. Model
When the infrared sensor data is collected in real time, if the distance between the collected infrared sensor data and the infrared sensing model is within a threshold, the controller determines the detected object as a human object, and when the infrared sensor data is outside the threshold, the detected object is a human object. If the sensing value of the first sensor is corrected and the microwave sensor data is collected, the detected object is determined to be a human object when the distance between the collected microwave sensor data and the microwave sensing model is within a threshold. If it is outside the threshold, it is determined that the detected object is not a human object, and corrects the sensing value of the second sensor, OR-operates the sensing value of the corrected first sensor and the corrected second sensor. To determine the quality of
The sensor unit is attached to the vertical rotation means provided on the left and right rotatable body rotates all the up, down, left and right areas,
The controller may determine that a human object exists in a space when a movement is detected through the first sensor and a temperature change detected by the second sensor is equal to or greater than a reference value.
The storage unit stores position information of a plurality of other sensor nodes installed within a preset range.
The controller may detect the movement and temperature change of the human object at a first time point at a first position and the movement and temperature change of the human object at a second time later than the first time point at a second position. It is determined that the movement from the first position to the second position, the moving speed of the human object is calculated using the time difference between the first time point and the second time point, the first position and the second position by using the person Calculating a movement direction vector of the object, designating another sensor node located on an extension line of the movement direction vector as a transmission target of a remote control signal, and providing a remote control signal including the movement speed to the transmission target,
Analyzing a result of determining that a human object exists in a space, setting an activation time zone and an inactivity time zone, supplying power to the first sensor and the second sensor during an activation time zone, and the first sensor is a human object during an inactivity time zone. When detecting the movement of the power supply to control the second sensor to operate,
According to a movement analysis result of the human object, the sensor unit controls the body and the vertical rotation means to rotate in the movement direction of the human object, and other sensors installed in the space corresponding to the movement direction of the human object using relative position information When the remote control signal including the moving direction of the human object is transmitted to the node, and receiving a remote control signal including the moving direction of the human object from another sensor node, the sensor unit uses the moving direction of the human object. And a sensor node for controlling the body and the vertical rotation means to face a human object.

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