KR100795110B1 - Indoor localization system and method for prevention of child's accident - Google Patents

Abstract

The present invention relates to an indoor location recognition system and method that can detect the location of the child by using a wireless location technology and to notify in advance that the child is approaching a predetermined risk factor to prevent a safety accident. According to the present invention, when a tag attached to a child sends out a signal, each receiver receives it and detects the distance to the tag, and when each receiver transmits the distance detection value to the server, the server collects it and the position of the tag. To calculate. The server compares the location of the tag with the location of the risk and determines whether it is dangerous and notifies it. In addition, when a plurality of receivers transmit a tag call signal and a tag attached to a child receives it and sends a response signal, a specific receiver adjacent to the position of the tag receives the same to detect the position of the tag, and the specific receiver detects the position. When the value is sent to the server, the server receives it, compares the location of the tag with the location of the risk and determines whether it is dangerous.

Child safety accidents, position recognition technology, UWB, RFID, tag, receiver

Description

Indoor localization system and method for prevention of child's accident}

Figure 1a to 1c is a schematic diagram for explaining the indoor position recognition system and method for the prevention of child safety accidents according to an embodiment of the present invention.

2 is a block diagram of an indoor location recognition system in accordance with an embodiment of the present invention.

3 is a flow chart of the indoor location recognition method according to an embodiment of the present invention.

Figure 4 is a schematic diagram of the indoor position recognition system for preventing a child safety accident according to another embodiment of the present invention.

5 is a block diagram of an indoor location recognition system in accordance with another embodiment of the present invention.

6 is a flow chart of the indoor location recognition method according to another embodiment of the present invention.

Description of the main parts of the drawing

10, 20a, 20b, 110, 120a: location tag

30, 130: Position-aware receiver 40, 140: Server

34: distance detector 43, 143: position calculator

44, 144: comparison judgment

The present invention relates to a location recognition application technology, and more specifically, to identify a child's location using a wireless location recognition technology such as ultra wide band (UWB), radio frequency identification (RFID) and the child as a predetermined risk factor The present invention relates to an indoor location recognition system and a method for notifying advance approach to preventing a safety accident.

Child safety accidents at home are increasing year by year. According to statistics from the National Statistical Office and the Korea Consumer Protection Agency, accidents among children under 14 years of age are increasing every year. Especially, in 2005, three out of five child safety accidents occurred at home, and three out of four children before school age 6 years of age or younger.

One of the reasons for the increasing number of child safety accidents at home every year is the neglect of parents who are chased by busy daily life. However, children are inherently curious about things, so no matter how well their parents manage, there is always a risk of a safety accident.

For example, the Republic of Korea Patent Publication No. 2005-97756 as a prior art for preventing child safety accidents. This prior art is a laundry control method that detects this when the child falls inside the washing machine through the infrared sensor and the washing operation is automatically stopped.

However, it is very difficult to apply this method to every household appliance (eg, a gas stove, washing machine, electric kettle, electric outlet, iron, etc.) that may threaten the safety of children. Moreover, since the above-described prior art only detects the presence or absence of a human through an infrared sensor, it is virtually impossible to apply this technique to children.

An object of the present invention is to provide a location recognition system and method that can effectively prevent the safety accidents of children from various hazards present in the room.

In order to achieve this object, the present invention uses a wireless location recognition technology such as ultra wide band (UWB), radio frequency identification (RFID) to determine the location of the child and inform the child in advance of the predetermined risk factors. Provide indoor positioning systems and methods to prevent safety accidents.

Indoor positioning system according to the present invention may be composed of a location tag and at least three or more location receiver and server. The location tag is attached to a child and emits a signal. Each of the location recognition receivers disposed at different places receives the transmission signal of the location recognition tag and detects the distance to the location recognition tag. The server receives the distance detection value from each position recognition receiver, calculates the position of the position recognition tag, compares the position of the risk factor, and determines whether or not there is a risk. In this case, the location tag and the location receiver are preferably UWB tags and UWB receivers, respectively.

In addition, the indoor location recognition system according to the present invention may be composed of a location tag and a plurality of location receiver and server. The location tag is attached to a child. Position-aware receivers are regularly distributed in a predetermined place and transmit call signals, respectively, and receive identification signals from position recognition tags. The server receives identification information from at least one of the location recognition receivers, calculates the location of the tag, compares it with the location of the risk factor, and determines whether or not there is a danger. In this case, the location tag and the location receiver are preferably RFID tags and RFID readers, respectively.

In such an indoor location recognition system, the risk factor may be a dangerous device occupying a specific location, wherein the system of the present invention may further include a second location recognition tag mounted on the dangerous device to determine the location of the dangerous device. Can be.

In addition, the risk factor may be a danger zone defined by at least three or more boundaries, wherein the system of the present invention may further include a second location recognition tag installed at each intersection of the boundary to identify the boundary of the danger zone. .

In addition, when the risk factor is a dangerous device occupying a specific location or a dangerous area defined by at least three or more boundaries, the server may store and store the location of the dangerous device or the boundary of the dangerous area as coordinates.

On the other hand, the indoor location recognition method according to the present invention, transmitting a signal from a tag attached to the child, receiving a signal of the tag in each receiver and detecting the distance to the tag using the same, each receiver Transmitting the distance detection value to the server, collecting each distance detection value at the server, calculating the position of the tag, and comparing the position of the tag and the position of the risk factor at the server to determine whether there is a risk; If the risk is determined to be dangerous, the server may include a step of notifying the risk.

In addition, the indoor position recognition method according to the present invention, transmitting a tag call signal from a plurality of receivers, receiving a call signal from a tag attached to a child and transmitting a response signal, at least adjacent to the position of the tag Receiving a response signal from one specific receiver and transmitting identification information to the server; receiving identification information from the server to determine the location of the receiver and calculating the location of the tag from the location of the receiver; And determining the risk by comparing the location of the risk factor with the location of the risk factor, and informing the risk at the server if it is determined to be dangerous.

In the indoor location recognition method, the location of the risk factor may be calculated using a tag distance detected through the receiver and the second tag mounted on the risk factor, or may be stored in coordinates in a server.

In addition, the determining of the risk may be a step of determining whether the distance between the tag position and the risk factor position is smaller than a predetermined threshold value.

Example

Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the present invention.

In describing the embodiments, descriptions of technical contents which are well known in the technical field to which the present invention belongs and are not directly related to the present invention will be omitted. This is to more clearly communicate without obscure the subject matter of the present invention by omitting unnecessary description.

1A to 1C are schematic diagrams for explaining an indoor location recognition system and method for preventing a child safety accident according to an embodiment of the present invention.

First, referring to FIG. 1A, the indoor location recognition system of the present embodiment may include a first location recognition tag 10 (hereinafter abbreviated as 'first tag') and second location recognition tags 20a and 20b (hereinafter referred to as 'second tag'). Abbreviated), at least three or more position-aware receivers 30 (hereinafter, abbreviated as 'receivers'), and servers (40 in FIG. 2).

The first tag 10 is attached to a child to be located, and the second tags 20a and 20b are used to identify risk factors. The receivers 30 are arranged in different places and receive signals from the tags 10, 20a, 20b. The receiver 30 detects the distance to each tag 10, 20a, 20b using the signals of the tags 10, 20a, 20b. The server 40 receives the distance detection value from each receiver 30 to calculate the positions of the tags 10, 20a, 20b. In addition, the server 40 compares the calculated tag position and determines whether or not the risk.

For example, the tags 10, 20a, 20b and the receiver 30 of the present embodiment are UWB tags and UWB receivers, respectively. As will be described later, UWB technology is one of the wireless location recognition technology that can determine the position of the static / dynamic object using a tag and a receiver. Therefore, this can be used to determine the location of the child, the location of the risk factors. Each position may be designated in two-dimensional coordinates as illustrated in FIG. 1A, or may be designated in three-dimensional coordinates as needed.

On the other hand, there are two cases of risk factors. One of them is a dangerous device occupying a specific position such as a gas range, a washing machine, an electric kettle, an electric outlet, an iron, etc., and the other is a dangerous area that can be defined by at least three boundaries such as a veranda and a porch.

The system of the present invention may be equipped with a second tag (20a) to the dangerous device to determine the location of the dangerous device, or may be installed a second tag (20b) for each intersection of the boundary to determine the boundary of the dangerous area. As such, instead of using the second tags 20a and 20b, the location of the dangerous device or the boundary of the dangerous area may be set as coordinates and stored directly in the server 40.

When the child approaches the dangerous equipment or enters the dangerous area, the server 40 determines this and informs of the danger. FIG. 1B is a schematic diagram for explaining when the child is close to the dangerous device, and FIG. 1C is for when the child enters the dangerous area.

As illustrated in FIG. 1B, whether the child is close to the dangerous device is determined by a distance between the position of the first tag 10 attached to the child and the position of the second tag 20a mounted to the dangerous device. It may be determined depending on whether the threshold value is smaller than δ. The distance threshold value δ that is used as a criterion of determination may be set or changed by the user in the server 40.

As illustrated in FIG. 1C, whether the child has entered the danger zone is determined according to whether the position of the first tag 10 attached to the child is in the danger zone determined from the position of the second tags 20b. can do. Of course, in this case, the thresholds can be set up so that the child can be alerted before they enter the danger zone.

Hereinafter, the configuration of the indoor location recognition system according to the present invention will be described in detail by way of examples.

2 is a block diagram of an indoor location recognition system according to an embodiment of the present invention.

Referring to FIG. 2, the tag 10 corresponds to both the first tag and the second tag described above, for example, a UWB tag. The tag 10 is composed of a transmitter 12 and a signal generator 14. The signal generator 14 generates a very short radio pulse, and the transmitter 12 continuously transmits it.

The receiver 30 is, for example, a UWB receiver and is composed of a receiver 32, a distance detector 34, and a server communication unit 36. The receiver 32 receives the radio pulse signal transmitted by the tag 10, and the distance detector 34 detects the distance from the signal to the tag 10. The distance to the tag 10 may be detected by using the propagation time or the intensity change of the signal. The server communication unit 36 transmits the detected tag distance to the server 40.

The server 40 includes a wired / wireless communication unit 41, a control unit 42, a position calculation unit 43, a comparison determination unit 44, a storage unit 45, and a notification unit 46. The wired / wireless communication unit 41 communicates with the receiver 30 by wire or wirelessly, and in particular, receives a tag distance transmitted from each receiver 30. The controller 42 controls the overall operation of the server 40, and the position calculator 43 calculates the position of the tag 10 using the tag distance received from each receiver 30. The position of the tag 10 can calculate a known triangulation method. Accordingly, at least three receivers 30 are required to determine the two-dimensional position of the tag 10, and at least four receivers 30 are required to determine the three-dimensional position.

The comparison determination unit 44 compares the position of the child and the risk factor using the position of the tag 10 calculated by the position calculation unit 43 and determines whether there is a danger. The storage unit 45 stores programs and data related to the operation of the server 40, and in particular, may store a location of a risk factor. The notification unit 46 informs the user of the risk when the comparison determination unit 44 determines that the risk is dangerous. For example, the notification unit 46 may have a function of generating an alarm sound and sending a warning message.

As described above, the UWB system including the UWB tag 10 and the UWB receiver 30 requires much less infrastructure than the conventional ultrasonic positioning system. The UWB tag 10 continuously transmits very short radio pulses, thus occupying several broadband bands, while having very low power density. This system is suitable as a location recognition system because the distance resolution is so excellent that it can accurately estimate the propagation time of the signal. The UWB signal operates at a low center frequency for excellent transmission, so it has excellent location accuracy even in indoor or shaded environments, not in line-of-sight (LOS) situations. In addition, since the UWB system does not use a carrier unlike the RF communication technology, the UWB system can be designed with a simple radio structure that does not require an IF module.

Hereinafter, the indoor location recognition method according to the present invention will be described in detail by way of examples.

3 is a flowchart of an indoor location recognition method according to an embodiment of the present invention.

Referring to FIG. 3, first, a risk factor location is set in the server 40 (S51). This step may use a method of detecting a tag distance through the second tag and the receiver and calculating a tag position using the same as described above. On the other hand, when the user knows the position coordinates of the risk factor, the user may directly store the position coordinates of the risk factor in the server 40. The former method is preferable when the position can be changed frequently, such as a dangerous equipment, and the latter method is preferable when there is no positional variation, such as a hazardous area. Further, the latter case is preferably performed before the tag distance is detected, but the former case may be simultaneously performed when the tag distance is calculated.

When the transmitter of the tag 10 attached to the child transmits a signal (S52), each receiver 30 receives it through the receiver and the distance detector detects the distance of the tag 10 (S53). Subsequently, when each receiver 30 transmits the distance detection value to the server 40 through the server communication unit (S54), the server 40 collects each distance detection value through the wired / wireless communication unit and the tag ( The position of 10) is calculated (S55). When the position of the tag 10 is calculated, the comparison determination unit of the server 40 compares this with the position of the risk factor and determines whether there is a risk (S56). If it is determined that the risk 40 is notified of the risk to the user through the notification unit (S57), if it is determined that the risk is not returned to step S55 to continuously detect the position change of the tag (10).

Hereinafter, another embodiment of the present invention will be described.

Figure 4 is a schematic diagram of the indoor location recognition system for preventing a child safety accident according to another embodiment of the present invention.

Referring to FIG. 4, the indoor location recognition system according to the present embodiment includes a first location tag 110 (hereinafter, abbreviated as 'first tag') and second location tags 120a and 120b; Abbreviated as 'second tag'), a location receiver 130 (hereinafter abbreviated as 'receiver'), and a server (140 in FIG. 5). However, unlike the above-described embodiment, the receiver 130 of the present embodiment is regularly distributed in a predetermined place. 4 shows an imaginary line in a horizontal and vertical direction, and the position of the receiver 130 corresponds to the intersection of this imaginary line.

The first tag 110 is attached to the child to be located, the second tag (120a, 120b) is used to identify the risk factor. The receiver 130 transmits a tag call signal, and the tags 110, 120a and 120b transmit a response signal to the call signal of the corresponding receiver 130 when entering the transmission range of the specific receiver 130. Identification information of the receiver 130 receiving the response signals of the tags 110, 120a, and 120b is transmitted to the server 140.

The server 140 receives identification information from a specific receiver 130 to determine which receiver 130 has read the tag response signal. The server 140 is pre-input of the position of each receiver 130. Therefore, when the receiver 130 that reads the tag response signal is known, the positions of the tags 110, 120a, and 120b may be calculated from the positions. Subsequently, the server 140 compares the position calculation values of the first tag 110 and the second tags 120a and 102b to determine and notify the risk.

For example, the tags 110, 120a, 120b and receiver 130 of the present embodiment are RFID tags and RFID readers, respectively. As will be described later, RFID technology is one of wireless location recognition technology that can determine the position of the static / dynamic target using a tag and a reader. Therefore, this can be used to determine the location of the child, the location of the risk factors.

Hereinafter, the configuration of the indoor location recognition system according to the present invention will be described in detail by way of examples.

5 is a block diagram of an indoor location recognition system according to another embodiment of the present invention.

Referring to FIG. 5, the tag 110 is an RFID tag, for example, and includes a transceiver 112 and a storage 114. The transceiver 112 receives a tag call signal and transmits a response signal. The storage unit 114 stores predetermined information including tag identification information.

The receiver 130 is, for example, an RFID reader, and includes a transceiver 132, a signal generator 134, and a server communication unit 136. The signal generator 134 generates a tag call signal, and the transceiver 132 transmits a tag call signal and receives a response signal. The server communication unit 136 transmits identification information of the receiver 130 to the server 140. The identification information may use the response signal received from the tag 110 as it is or may be predetermined information stored in the receiver 130 itself. In the latter case, the receiver 130 may further include a storage unit for storing identification information.

The server 140 includes a wired / wireless communication unit 141, a control unit 142, a position calculator 143, a comparison determination unit 144, a storage unit 145, and a notification unit 146. The wired / wireless communication unit 141 communicates with the receiver 130 by wire or wirelessly, and in particular, receives receiver identification information transmitted from the specific receiver 130. The control unit 142 controls the overall operation of the server 140, the position calculation unit 143 to determine which receiver received the tag response signal from the receiver identification information and using the location of the receiver tag 110 Calculate the position of. The comparison plate end 144 compares the position of the child and the risk factor using the calculated position of the tag 110 and determines whether there is a risk. The storage unit 145 and the notification unit 146 are the same as in the above-described embodiment.

As described above, the RFID system composed of the RFID tag 110 and the RFID reader 130 is a location recognition system that can be constructed with low facility investment and low cost. The RFID system uses the International Safety Management Protocol (ISM) bands of 13.56 MHz and 915 MHz, and various known technologies are used to prevent collisions between tags or readers.

Hereinafter, the indoor location recognition method according to the present invention will be described in detail by way of examples.

6 is a flowchart illustrating an indoor location recognition method according to another embodiment of the present invention.

Referring to FIG. 6, first, a risk location is set in the server 140 (S151). This step may use a method of detecting the tag position through the second tag and the receiver as described above, and when the user knows the position coordinates of the hazard, the user directly sends the position coordinates of the hazard to the server 140. You can also save.

When each of the plurality of receivers 130 transmits a tag call signal through a transceiver (S152), the tag 110 receives a call signal from the receiver 130 close to its position and transmits a response signal thereto (S153). ). The specific receiver 130 receiving the response signal from the tag 110 transmits its identification information to the server 140 through the server communication unit (S154).

The server 140 receives the identification information of the specific receiver 130 through the wired / wireless communication unit and calculates the position of the tag 110 therefrom (S155). If there is only one receiver 130 that transmits the identification information, the position of the receiver 130 becomes the position of the tag 110. If several receivers 130 simultaneously send identification information, the position of the receivers 130 The average value is the position of the tag 110. When the server 140 determines the location of the receiver 130, a reference RFID tag (not shown) may be used.

Subsequently, the server 140 compares the position of the child and the risk factor with each other in the comparison determination unit to determine whether the danger (S156). If it is determined that the risk server 140 notifies the user of the risk through the notification unit (S157), if it is determined that the risk is not returned to step S156 to continuously detect the position change of the tag (110).

As described above, the present specification and drawings have been described with respect to preferred embodiments of the present invention, although specific terms have been used, these are merely used in a general sense to easily explain the technical contents of the present invention and to help the understanding of the present invention. It is not intended to limit the scope of the 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.

The location recognition system and method of the present invention can easily identify the location of various hazards and children that are present in the room using wireless location recognition technology, through which safety notifications are informed that children approach the hazards. It can prevent it beforehand. The location recognition system and method of the present invention can effectively prevent safety accidents by preventing children from accessing dangerous areas such as porches and porches, as well as dangerous devices such as gas ranges, washing machines, electric kettles, electric outlets and irons. .

Claims (18)

As an indoor location recognition system to prevent a child from accident by notifying in advance that a child approaches a predetermined risk factor, A position recognition tag attached to the child and transmitting a signal; At least three position recognition receivers disposed at different places and respectively detecting a distance to the position recognition tag by receiving a transmission signal of the position recognition tag; And A server configured to receive a distance detection value from each of the location recognition receivers, calculate a location of the location recognition tag, compare the location with the location of the risk factor, and determine whether or not there is a danger; Indoor location recognition system comprising a. The method of claim 1, And the location tag and the location receiver are UWB tags and UWB receivers, respectively. The method according to claim 1 or 2, The risk factor is a dangerous device occupying a specific position, the second position recognition tag mounted to the dangerous device to determine the location of the dangerous device; Indoor location recognition system further comprises. The method according to claim 1 or 2, The risk factor is a danger zone defined by at least three or more boundaries, and a second position recognition tag installed at each intersection of the boundaries to identify the boundary of the danger zone; Indoor location recognition system further comprises. The method according to claim 1 or 2, The risk factor is a dangerous device occupying a specific location or a dangerous area defined by at least three or more boundaries, and the server stores the location of the dangerous device or the boundary of the dangerous area by coordinates and stores the room. Position Recognition System. As an indoor location recognition system to prevent a child from accident by notifying in advance that a child approaches a predetermined risk factor, A location tag attached to the child; A plurality of location recognition receivers regularly distributed in a predetermined place, each transmitting a call signal, receiving a response signal from the location recognition tag, and transmitting identification information; And A server configured to receive the identification information from at least one of the location recognition receivers, calculate a location of the tag, compare the location with the location of the hazard, and determine whether or not there is a danger; Indoor location recognition system comprising a. The method of claim 6, And the location tag and the location receiver are each an RFID tag and an RFID reader. The method according to claim 6 or 7, The risk factor is a dangerous device occupying a specific position, the second position recognition tag mounted to the dangerous device to determine the location of the dangerous device; Indoor location recognition system further comprises. The method according to claim 6 or 7, The risk factor is a danger zone defined by at least three or more boundaries, and a second position recognition tag installed at each intersection of the boundaries to identify the boundary of the danger zone; Indoor location recognition system further comprises. The method according to claim 6 or 7, The risk factor is a danger device occupying a specific location or a danger area defined by at least three or more boundaries, and the server stores the location of the danger device or the boundary of the danger area by setting coordinates and stores the room. Position Recognition System. As a method of indoor location recognition to prevent a child from accident by notifying in advance that a child approaches a predetermined risk factor, Transmitting a signal from a tag attached to the child; Receiving a signal of the tag at each receiver and using this to detect the distance to the tag; Sending the distance detection value to a server at each of the receivers; Collecting each of the distance detection values in the server and calculating a position of the tag; Comparing the location of the tag with the location of the risk factor in the server to determine whether there is a danger; And Informing the server of risk if it is determined to be dangerous; Indoor location recognition method comprising a. The method of claim 11, The location of the risk factor is indoor location recognition method, characterized in that calculated using the tag distance detected by the second tag and the receiver mounted to the risk factor. The method of claim 11, The location of the risk factor is indoor location recognition method, characterized in that stored in the server coordinates. The method according to any one of claims 11 to 13, The determining whether the risk is the indoor position recognition method, characterized in that the step of determining whether the distance between the tag position and the risk factor position is less than a predetermined threshold value. As a method of indoor location recognition to prevent a child from accident by notifying in advance that a child approaches a predetermined risk factor, Transmitting a tag call signal in a plurality of receivers; Receiving the call signal from a tag attached to a child and transmitting a response signal; Receiving the response signal from at least one specific receiver adjacent to the position of the tag and transmitting identification information to a server; Receiving the identification information at the server to determine the location of the receiver and calculating the location of the tag from the location of the receiver; Comparing the location of the tag with the location of the risk factor in the server to determine whether there is a danger; And Informing the server of risk if it is determined to be dangerous; Indoor location recognition method comprising a. The method of claim 15, The location of the risk factor is indoor location recognition method, characterized in that calculated using the tag distance detected by the second tag and the receiver mounted to the risk factor. The method of claim 15, The location of the risk factor is indoor location recognition method, characterized in that stored in the server coordinates. The method according to any one of claims 15 to 17, The determining whether the risk is the indoor position recognition method, characterized in that the step of determining whether the distance between the tag position and the risk factor position is less than a predetermined threshold value.

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