KR20190072988A - Screendoor Human body Detection System based on Biometric Detection with Ultra High Frequency Signal - Google Patents

Abstract

Provided is a human body sensing system of a screen door. The human body sensing system comprises: a first human body sensing module installed on both side of the screen door and including a plurality of transmitters and a plurality of receivers; and a second human body sensing module. The receiver measures the strength of a reference signal received from the transmitter and senses the occurrence of an event when a difference between the measured strength and the reference strength is equal to or greater than a certain threshold value. The human body sensing system can use a superhigh frequency instead of light, so that the system is not scattered by oil dust or dust floating in space and is hardly affected by a transception feature.

Description

TECHNICAL FIELD [0001] The present invention relates to a screen door human body detection system based on biosensor using a very high frequency signal,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a human body detection system, and more particularly, to a biometric object detection system using a very high frequency signal.

The contents described in this section merely provide background information on the present embodiment and do not constitute the prior art.

Conventional screen doors are equipped with infrared ray transmitting / receiving device at one end of the screen door to detect passengers' nesting and infrared ray reflector at the other end of the screen door so that if there is a thing or body between these lines, However, these devices are contaminated by oil mist and dust caused by electric trains in subway, etc., and therefore, frequent cleaning is required. This cleaning is constantly occurring even during the operation of the train, so maintenance personnel have to work from time to time in the narrow space between the screen door and the subway, and the maintenance personnel are killed.

In recent years, there has been a move to replace these infrared sensors with laser scanners, because laser scanners use powerful laser techniques, so that the laser receiver can receive reflected waves even if there is no laser reflector on the other side Such a device scans the laser beam in the vertical direction of the door, measures the reflected wave, compares the reflected wave when the human body exists, and judges whether the human body is affected by the difference. Such a system also has many disadvantages. First, it is expensive and it is a risk of laser beam. In particular, there is a concern that the laser beam may reach blindness if irradiated to the eye of the human body. Also, Is made of a plastic material through which the light passes, and when exposed to oil, it is contaminated and the transmission and reception characteristics are deteriorated and malfunction may be caused. Therefore, this device also has a disadvantage of frequent cleaning. Increasing the laser transmission power to offset the effects of this grease also poses a problem because of the increased impact on the human body,

This is because the main reason infrared rays and lasers are inappropriate for these subways is that they are scattered in small dust particles, water droplets and water droplets.

Since there is a problem with the conventional method, it is necessary to derive a method of detecting a human body of a screen door in which such a problem does not occur.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a first human body detection module and a second human body detection module which are installed on both sides of a screen door and include a plurality of transmitters and a plurality of receivers, And the receiver measures the strength of the reference signal received from the transmitter and detects that the event has occurred when the difference between the measured intensity and the reference intensity is greater than a specific threshold.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, unless further departing from the spirit and scope of the invention as defined by the appended claims. It will be possible.

According to an aspect of the present invention, there is provided a human body detection system for a screen door, including: a first human body detection module installed on one side of a screen door and including a plurality of transmitters and a plurality of receivers; And a second human body detection module installed on the other side of the screen door so as to face the first human body detection module and including a plurality of transmitters and a plurality of receivers and the transmitter includes a door open / And the receiver measures the strength of the reference signal received from the transmitter and detects that the event has occurred if the difference between the measured intensity and the reference intensity is above a certain threshold.

The first human body detection module includes a plurality of transmitters and a plurality of receivers disposed alternately in a transmitter-receiver order, and the second human body detection module includes a plurality of transmitters and a plurality of receivers arranged alternately in a receiver- .

In addition, in the first human body detection module, the sum of the numbers of the plurality of transmitters and the plurality of receivers is an odd number, and the sum of the numbers of the plurality of transmitters and the plurality of receivers may be an odd number.

The transmitter included in the first human body detection module transmits the reference signal to the receiver included in the second human body detection module and if the event information is received, the event information is also transmitted to the second human body detection module And the receiver included in the first human body detection module receives the reference signal from the transmitter included in the second human body detection module and transmits the difference between the measured intensity of the received reference signal and the reference intensity to a predetermined threshold value or more It is possible to transmit the event information to the transmitter arranged below.

In addition, the transmitter included in the second human body detection module transmits the reference signal to the receiver included in the first human body detection module, and if the event information is received, event information is also transmitted to the first human body detection module And the receiver included in the second human body detection module receives the reference signal from the transmitter included in the first human body detection module and transmits the difference between the measured intensity of the received reference signal and the reference intensity to a predetermined threshold value or more It is possible to transmit the event information to the transmitter arranged below.

The second human body detection module may transmit the collected event information to the neighboring human body detection module.

Also, the second human body detection module may transmit the collected event information to the engine controller.

And, the reference strength may be the intensity of the reference signal measured by the receiver in the absence of a human body between the transmitter and the receiver.

In addition, the reference strength may have a value independent of each receiver.

The reference strength may be an average value of the strength of the reference signal measured for a predetermined period by the receiver when there is no human body between the transmitter and the receiver.

Meanwhile, a human body detection system of a screen door according to an embodiment of the present invention includes a transmission human body detection module installed on one side of a screen door and including a plurality of transmitters; And a receiving human body detection module installed on the other side of the screen door to face the first human body detection module and including a plurality of receivers, wherein the transmitter transmits a reference signal to a door open / close region, which is an area where the screen door is opened and closed And the receiver may measure the strength of the reference signal received from the transmitter and detect that the event has occurred if the difference between the measured strength and the reference strength is above a certain threshold.

Also, the receiving human body detecting module may transmit the collected event information to the receiving human body detecting module installed adjacent thereto.

According to various embodiments of the present invention, there are provided a first human body detection module and a second human body detection module installed on both sides of a screen door and including a plurality of transmitters and a plurality of receivers, It is possible to provide a human body detection system that detects an occurrence of an event when the measured intensity and the difference between the measured intensity and the reference intensity are greater than a specific threshold value. Thus, the human body detection system can use a very high frequency instead of the light, It does not scatter at the mixed dust or dust floating in the space and is hardly affected by the transmission and reception characteristics.

The effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the following description will be.

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the technical features of the invention.
1 illustrates a human body detection system of a screen door, according to an embodiment of the present invention;
2 is a view showing a human body detection system of a screen door viewed from above, according to an embodiment of the present invention;
3 is a view showing the external appearance of a human body detection system of a screen door according to an embodiment of the present invention;
FIG. 4 illustrates an example of a transmitter and a receiver included in a human body detection module according to an embodiment of the present invention; FIG.
5 is a block diagram illustrating the structure of a transmitter according to an embodiment of the present invention;
6 is a block diagram illustrating the structure of a receiver according to an embodiment of the present invention;
7 is a view for explaining a method of detecting a human body according to an embodiment of the present invention;
8 is a view showing an arrangement of human body detection modules installed between a passenger car and a screen door according to an embodiment of the present invention;
9 is a block diagram illustrating the structure of a human body detection system including a plurality of human body detection modules according to an embodiment of the present invention.
10 is a diagram for explaining a communication method when a human body detection module includes a plurality of transmitters and receivers according to an embodiment of the present invention;
11 is a diagram for explaining a communication method in a case where a transmitting human body detecting module includes only a plurality of transmitters and a receiving human body detecting module includes only a plurality of receivers according to another embodiment of the present invention;
FIG. 12 is a diagram for explaining a communication method in the case of FIG. 11 according to another embodiment of the present invention; FIG.
FIG. 13 is a diagram for explaining a communication method in the case of FIG. 11, according to another embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS For a more complete understanding of the nature and advantages of the present invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings, in which:

In the following description and the accompanying drawings, detailed description of well-known functions or constructions that may obscure the subject matter of the present invention will be omitted. It should be noted that the same constituent elements are denoted by the same reference numerals as possible throughout the drawings.

The terms and words used in the following description and drawings are not to be construed in an ordinary sense or a dictionary, and the inventor can properly define his or her invention as a concept of a term to be described in the best way It should be construed as meaning and concept consistent with the technical idea of the present invention.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, It is to be understood that equivalents and modifications are possible.

Also, terms including ordinal numbers such as first, second, etc. are used to describe various elements, and are used only for the purpose of distinguishing one element from another, Not used. For example, without departing from the scope of the present invention, the second component may be referred to as a first component, and similarly, the first component may also be referred to as a second component.

In addition, when referring to an element as being "connected" or "connected" to another element, it means that it can be connected or connected logically or physically.

In other words, it is to be understood that although an element may be directly connected or connected to another element, there may be other elements in between, or indirectly connected or connected.

It is also to be understood that the terms such as " comprising "or" having ", as used herein, are intended to specify the presence of stated features, integers, It should be understood that the foregoing does not preclude the presence or addition of other features, numbers, steps, operations, elements, parts, or combinations thereof.

Also, the terms " part, "" module," and " module ", etc. in the specification mean a unit for processing at least one function or operation and may be implemented by hardware or software or a combination of hardware and software have.

It will also be understood by those skilled in the art that in the context of describing the invention (particularly in the context of the following claims), the terms " a or an, ""Quot; or " include ", unless the context clearly dictates otherwise.

Hereinafter, the present invention will be described in detail with reference to the drawings.

1 is a view showing a human body detection system of a screen door according to an embodiment of the present invention.

As shown in FIG. 1, the screen door 10 has an emergency door area where doors are opened only in an emergency, and door areas where doors are automatically opened and closed. The emergency door area and the door area are opened and the screen door is opened The first human body detection module 100 and the second human body detection module 200 corresponding to the human body detection system of the screen door 10 are installed on both sides of the door open / close region which is a closed region.

The human body detection system according to an embodiment of the present invention detects whether or not the body of a passenger is present in a door opening / closing area, which is a detection subject area, through living body detection using a very high frequency signal. This can prevent an accident that the body of the occupant gets caught in the screen door.

The microwave signal (microwave to frequency signal) used for detecting the presence of a human body in the human body detection system according to the embodiment of the present invention is different from the case of laser light or infrared ray, It is not scattered in the dust that is generated and transmitted and received, and is hardly affected by the transmission / reception characteristics. In addition, since a very high frequency signal is characterized in that energy is absorbed by moisture or electrolytes in the human body, if the human body exists between the transmitter and the receiver, the receiver receives much less energy than when no human body exists. Utilizing the properties of a very high frequency signal, the human body detection system can detect whether or not such human body is inserted.

The first human body detection module 100 and the second human body detection module 200 included in the human body detection system are disposed on both sides of a door opening and closing region of the screen door 10 and are disposed on the inner side of the screen door, .

The first human body detection module 100 and the second human body detection module 200 generate a very high frequency beam in a door open / close region which is an area between the first and second human body detection modules 100 and 200. As shown in FIG. 1, the microwave beam is generated throughout the door open / close region, and when the microwave beam is blocked by the occupant, the human body detection system senses the microwave beam and generates an event that the occupant is present on the screen door.

1 shows only a part of the screen door 10, the screen door 10 includes N (N is a natural number) door opening / closing area, and the human body detection system includes N first human detection modules 100, And N second human detection modules 200 are installed on both sides of the door open / close region to detect the presence of a passenger. In addition, the first human body detection module 100 includes a total of M (M is a natural number) transmitter and a receiver, and the second human body detection module 100 also includes a total of M (M is a natural number) do. The M transmitters and receivers of the first human body detection module correspond to the M transmitters and the receivers of the second human body detection module in one-to-one correspondence, and transmit and receive the very high frequency reference signals to / from each other.

2 is a view showing a human body sensing system of the screen door 10 viewed from above, according to an embodiment of the present invention. As shown in FIG. 2, it can be seen that the first human body detection module 100 and the second human body detection module 200 of the human body detection system are installed on the left and right sides of the door open / close region of the screen door 10.

FIG. 3 is a diagram showing the external appearance of a human body detection system of a screen door according to an embodiment of the present invention.

As shown in FIG. 3, the first human body detection module 100 is installed on one side of the screen door and includes a plurality of transmitters and a plurality of receivers. The second human body detection module 200 is installed to face the first human body detection module on the other side of the screen door and includes a plurality of transmitters and a plurality of receivers.

FIG. 3 illustrates a case where three transmitters and receivers are included in the first human body detection module 100 and the second human body detection module 200, respectively. 3, the first human body detection module 100 includes three transmitters and receivers 110 and 120 and the second human body detection module 200 includes a third transmitter and receivers 210 and 220, 230) are included. The three transmitters and receivers 110, 120 and 130 of the first human body detection module 100 and the third transmitter and the receivers 210, 220 and 230 of the second human body detection module 200 are paired with each other at the same height It can be confirmed that a very high frequency reference signal is transmitted and received.

4 is a diagram illustrating an example of a transmitter and a receiver included in a human body detection module according to an embodiment of the present invention. In the case of FIG. 4, a pair of transmitter 110 and receiver 210 are shown. The transmitter 110 includes a monopole or dipole type antenna 111 and the receiver 210 also includes an antenna 211 of a monopole or dipole type.

The very high frequency electromagnetic wave beam formed by the transmitter and the receiver of the human body detection module must cover the door opening and closing areas of all the screen doors in the vertical direction of the screen door 10. Generally, when using the same monopole / dipole or dipole antennas in each microwave transmitter and receiver, the transmitter and the receiver will be approximately (2-3m) in the vertical direction The electromagnetic wave beam thickness is about 30-50 cm (transmission power 1 mW, reception sensitivity -100 dBm).

5 is a block diagram illustrating the structure of a transmitter 110, in accordance with one embodiment of the present invention. The transmitters included in the human body detection system each have the structure shown in Fig.

5, the transmitter 110 includes an antenna unit 111, a very high frequency transceiver 113, a reference signal generator 115, and a controller 117.

The antenna unit 111 includes at least one antenna, and may be a PCB antenna, a monopole antenna, a dipole antenna, or the like. Accordingly, the antenna unit 111 transmits a very high frequency reference signal.

The very high frequency transceiver 113 transmits a very high frequency signal such as an ISM band (Industrial Scientific Medical band) through an antenna 111.

The reference signal generating unit 115 generates a very high frequency reference signal using an oscillator or the like and transmits the generated very high frequency reference signal to the transceiver 113.

The control unit 117 controls the very high frequency transceiver 113 such that the very high frequency reference signal is repeatedly transmitted at least ten times per second. To this end, the control unit 117 is designed to embed a communication protocol for controlling the microwave transceiver 113.

6 is a block diagram illustrating the structure of a receiver 210, in accordance with one embodiment of the present invention. Each of the receivers included in the human body detection system has the structure shown in Fig.

6, the receiver 210 includes an antenna unit 211, a very high frequency transceiver 213, a storage unit 215, and a control unit 217.

The antenna unit 211 includes at least one antenna, and may be implemented as a PCB antenna, a monopole antenna, or a dipole antenna. Accordingly, the antenna unit 211 receives the very high frequency reference signal.

The very high frequency transceiver 213 receives a very high frequency signal such as an ISM band (Industrial Scientific Medical band) through an antenna 211.

The storage unit 215 stores data used in the receiver 210. Specifically, the storage unit 215 stores the reference intensity value and the specific threshold value. Here, the reference intensity value represents the intensity of the received signal when no human body exists between the transmitter and the receiver, and this value has different values depending on the location and environment. If the difference between the intensity of the reference signal received by the receiver and the reference intensity value is equal to or greater than a specific threshold value, It is detected that an event has occurred.

The control unit 117 controls the very high frequency reference signal to be received through the very high frequency transceiver 113. To this end, the control unit 117 is designed to embed a communication protocol for controlling the microwave transceiver 113.

In addition, the controller 117 measures the strength of the reference signal received from the transmitter, and detects that an event has occurred if the difference between the measured intensity and the reference intensity is greater than or equal to a specific threshold value. To this end, the controller 117 compares RSSI (Received Signal Strength Indication) measured by the ultra-high frequency transceiver 113 with the stored reference intensity value with respect to the strength of the received reference signal to determine whether a human presence event has occurred. Here, the event indicates an event that a human body exists between the transmitter and the receiver.

With such a configuration, the transmitter and the receiver can detect a human body present between them, which will be described below.

7 is a view for explaining a method of detecting a human body according to an embodiment of the present invention. 7, the intensity of the very high frequency reference signal transmitted by the first transmitter 110 is reduced by the occupant 20, and the first receiver 210 determines whether the difference between the reception intensity and the reference intensity is greater than a specific threshold value It is determined that the occupant 20 exists and an event is generated.

Specifically, the first transmitter 110 transmits a reference signal to the door open / close region, which is an area where the screen door is opened and closed. The first receiver 210 measures the intensity of the reference signal received from the first transmitter 110 If the difference between the measured intensity and the reference intensity is greater than or equal to a certain threshold value, it is detected that the event has occurred.

First, the first transmitter 110 transmits a reference signal to the door open / close region, which is an area where the screen door is opened and closed. The first receiver 210 measures the intensity of the reference signal received from the first transmitter 110. As described above, the first receiver 210 measures the intensity of the very high frequency reference signal received from the first transmitter 110 in advance in a state where no human body is present in the door open / close region, . The first receiver 210 performs a process of learning the initial value of the reference intensity since the environment is different for each door opening and closing region.

That is, the reference intensity is the intensity of the reference signal measured by the first receiver 210 when there is no living body between the door open / close regions. The reference intensities are independent values for a plurality of receivers, and the plurality of receivers respectively store independent reference intensities. For example, the reference intensity may be an average value of the intensity of the reference signal measured by the first receiver 210 for a predetermined period when there is no human body in the door open / close region. In this way, since the plurality of receivers have independent reference strengths, even if they have different environments for each door opening / closing area of the screen door, it is possible to calculate and apply a reference intensity value suitable for the door opening and closing areas through learning.

Thereafter, the first receiver 210 measures the strength of the reference signal received from the first transmitter 110 and detects that an event has occurred if the difference between the measured strength and the reference strength is greater than or equal to a certain threshold.

The reference signal received by the first receiver 210 from the first transmitter 110 by the occupant 20 entering the door open / close region between the first receiver 210 and the first transmitter 110 has the intensity . This is because a substantial portion of the very high frequency reference signal is absorbed or diffracted by the body of the occupant 20.

Accordingly, if the difference between the intensity of the measured very high frequency reference signal and the previously stored reference intensity is greater than or equal to a specific threshold value, the first receiver 210 can detect that the passenger 20 is attempting to enter the door opening / .

The structure and operation of the first transmitter 110 and the first receiver 210 described above are applied to a plurality of transmitters and a plurality of receivers included in the first human body detection module 100 and the second human body detection module 200 All apply. Hereinafter, the overall structure and operation of the human body detection system of the screen door will be described in detail.

8 is a view showing an arrangement of human body detection modules installed between a passenger car and a screen door according to an embodiment of the present invention. 9 is a block diagram illustrating a structure of a human body detection system including a plurality of human body detection modules according to an embodiment of the present invention.

As shown in FIG. 8, it can be seen that there are N door-to-door doors in the passenger compartment of the subway, and there are N screen doors corresponding thereto.

As shown in FIGS. 8 and 9, the screen door 10 includes N (N is a natural number) door open / close areas, and the first human body detection modules 100_1 to 100_N are provided on both sides of each door open / And the second human body detection modules 200_1 to 200_N are arranged.

The first human body detection module 100_1 and the first human body detection module 200_1 detect presence or absence of a human body using a very high frequency and generate an event when a human body is detected. Then, the first second human body detection module 200_1 transmits the related event information to the second human body detection module 100_2 through the wired or wireless communication. Herein, the event information is information indicating that a passenger is present or an occupant is entered in the door open / close area, and includes information on the occurrence of the event, information on the event occurrence location, information on the event occurrence time, and the like.

In this manner, the second human body detection modules 200_1 to 200_N transmit the generated event information to the first human body detection modules 100_1 to 100_N installed adjacent to each other.

Then, the Nth second human body detection module 200_N at the final end transmits the generated event information to the engine controller 300. Then, the engine controller 300 analyzes the event information, and when the event is generated, it can display on the screen that the occupant exists on the screen door at a certain position. Thus, the engineer can check whether the occupant exists on the screen door It is possible to easily check and control whether the passenger has completed the boarding.

In addition, basically, each screen door central processing device determines the opening / closing of each screen door by itself, and can open the door immediately when a human body is caught. Then, after a certain period of time, Try to close it repeatedly until it does not occur. When all the screen doors are closed, the driver can confirm the driver's control through the central monitor console of the engine controller 300, thereby enabling the carriage start.

In addition, the engine controller 300 may transmit the event information to the history control unit 400. [ Then, the history general control device 400 analyzes the event information, and when the event is generated, it is possible to display on the screen that the occupant exists on the screen door at a certain position. Therefore, Or whether all passengers have completed boarding.

The configuration of the human body detection module for delivering the event information will be described in more detail below. 10 is a diagram for explaining a communication method when a human body detection module includes a plurality of transmitters and receivers according to an embodiment of the present invention.

The first human body detection module 100 includes a plurality of transmitters and a plurality of receivers alternately arranged in a transmitter-receiver order, and the second human body detection module 200 includes a plurality of transmitters and a plurality of transmitters, And a plurality of receivers.

In this case, the sum of the number of the plurality of transmitters and the plurality of receivers is odd in the first human body detection module 100, and the sum of the numbers of the plurality of transmitters and the plurality of receivers is odd in the second human body detection module 200 . For example, as shown in FIG. 10, the first human body detection module 100 may include a total of three transmitters and receivers, that is, two transmitters and one receiver, and the second human body detecting module 200 includes a transmitter 1 A total of three transmitters and receivers can be included, with two receivers and two receivers.

The transmitter included in the first human body detection module 100 transmits the reference signal to the receiver included in the second human body detection module 200. If the receiver receives the event information, To the receiver included in the human body detection module (200). The receiver included in the first human body detection module 100 receives the reference signal from the transmitter included in the second human body detection module 200 and detects the difference between the measured intensity of the received reference signal and the reference intensity, If it is detected that an event has occurred, the event information is transmitted to the transmitter arranged below.

In addition, the transmitter included in the second human body detection module 200 transmits the reference signal to the receiver included in the first human body detection module 100, and if the event information is received, To the receiver included in the first human body detection module (100). The receiver included in the second human body detection module 200 receives the reference signal from the transmitter included in the first human body detection module 100 and detects a difference between the measured intensity of the received reference signal and the reference intensity, If it is detected that an event has occurred, the event information is transmitted to the transmitter arranged below.

The second human body detection module transmits the received event information to the neighboring human body detection module. Specifically, the second human body detection module collects all the event information about the events generated from the first receiver to the last receiver, and transmits the collected event information to the first human body detection module installed in the neighborhood of the final receiver.

In addition, the second human body detection module 200 may transmit the collected event information to the engine controller 300. Specifically, the second human body detection module at the final end can transmit collected event information to the engine controller 300, and the engine controller 300 controls the screen door using the received event information .

10, the first human body detection module 100 includes a first transmitter 110, a second receiver 120, and a third transmitter 130, and the second human body detection module 200 includes a first human body detection module 100, A receiver 210, a second transmitter 220, and a third receiver 230.

In this case, the signal is transmitted from the first transmitter 110 to the first receiver 210 to the second transmitter 220, to the second receiver 120, to the third transmitter 130, And finally the collected event information is transmitted to the first human body detection module installed adjacent to the third receiver 230.

9, the event information is transmitted to the first human body detection module 100_1, the second human body detection module 200_1, the first human body detection module 100_2, the second human body detection module 200_2, ) -> ... -> first_N human body detection module 100_N -> second_N human body detection module 200_N -> engine controller 300.

However, it can be configured in other forms other than the above-described method, which will be described with reference to FIGS. 11 to 13. FIG. 11 is a diagram for explaining a communication method in a case where the transmitting human body detecting module 500 includes only a plurality of transmitters and the receiving human body detecting module 600 includes only a plurality of receivers according to another embodiment of the present invention .

The transmitting human body detecting module 500 may include a plurality of transmitters, and the receiving human body detecting module 600 may be configured to face the transmitting human body detecting module and include a plurality of receivers.

In this case, the receiving human body detecting module 600 transmits the collected event information to the neighboring receiving human body detecting module.

11, the transmission human body detection module 500 includes a fourth transmitter 510, a fifth transmitter 520, and a sixth transmitter 530, and the reception human body detection module 600 includes a fourth receiver 610, a fifth receiver 620, and a sixth receiver 630.

In this case, since the event information is generated and transmitted only by the receivers, the event information is transmitted in the order of the fourth receiver 610, the fifth receiver 620, and the sixth receiver 630, Is transmitted to the receiving human body detection module installed adjacent to the sixth receiver 630.

FIG. 12 is a diagram for explaining a communication method in the case of FIG. 11 according to another embodiment of the present invention, FIG. 13 is a diagram for explaining a communication method in the case of FIG. 11 according to another embodiment of the present invention to be.

11, when the transmitting human body detecting module 500 and the receiving human body detecting module 600 are configured as shown in FIG. 11, the human body detecting system transmits the event information only through the receiving human body detecting module 600, unlike the case of FIGS. Such a transmission scheme is shown in FIGS. 12 and 13. FIG.

12 and 13, the event information is transmitted to the Nth receiving human body detecting module 600_N through the first receiving human body detecting module 600_1, the second receiving human body detecting module 600_2, - > engine controller 300 in this order.

In this manner, the human body detection system having the configuration as shown in FIG. 11 can transmit event information using only the receiving human body detecting module in the manner shown in FIGS. 12 and 13. FIG.

It is to be understood that the technical idea of the present invention may also be applied to a computer-readable recording medium having a computer program for performing functions and methods of the human body detection system according to the present embodiment. In addition, the technical idea according to various embodiments of the present invention may be realized in the form of a computer-readable programming language code recorded on a computer-readable recording medium. The computer-readable recording medium is any data storage device that can be read by a computer and can store data. For example, the computer-readable recording medium may be a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical disk, a hard disk drive, a flash memory, a solid state disk (SSD), or the like. In addition, the computer readable code or program stored in the computer readable recording medium may be transmitted through a network connected between the computers.

Although the present specification and drawings illustrate exemplary device configurations, implementations of the functional operations and the subject matter described herein may be embodied in other types of digital electronic circuitry or include structures and their structural equivalents disclosed herein Firmware, or hardware, or a combination of one or more of the foregoing.

Thus, although the present invention has been described in detail with reference to the above examples, those skilled in the art will appreciate that various modifications, changes, and modifications can be made thereto without departing from the scope of the present invention.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the present invention.

10: Screen door
20: Passenger
100: First human body detection module
200: second human body detection module
110: first transmitter
210: first receiver
111:
113: Very High Frequency Transceiver
115: Reference signal generator
117:
211:
213: Very High Frequency Transceiver
215:
217:
300: Engine controller
400: History control unit
500: Transmitting human body detection module
600: Receiving human body detection module

Claims (12)

In a human body detection system of a screen door,
A first human body detecting module installed on one side of the screen door and including a plurality of transmitters and a plurality of receivers; And
And a second human body detection module installed on the other side of the screen door to face the first human body detection module and including a plurality of transmitters and a plurality of receivers,
The transmitter,
The reference signal is transmitted to the door open / close region which is an area where the screen door is opened and closed,
The receiver,
And measures the intensity of the reference signal received from the transmitter and detects that an event has occurred if the difference between the measured intensity and the reference intensity is greater than or equal to a specific threshold value.
The method according to claim 1,
The first human body detection module includes:
A plurality of transmitters and a plurality of receivers are arranged alternately in a transmitter-receiver sequence,
The second human body detection module,
Wherein a plurality of transmitters and a plurality of receivers are arranged alternately in a receiver-transmitter order.
The method of claim 2,
The first human body detection module includes:
The sum of the numbers of the plurality of transmitters and the plurality of receivers is an odd number,
The second human body detection module,
Wherein the sum of the plurality of transmitters and the plurality of receivers is an odd number.
The method of claim 3,
The transmitter included in the first human body detection module transmits the reference signal to the receiver included in the second human body detection module and if the event information is received, the event information together with the reference signal is also included in the second human body detection module Receiver,
The receiver included in the first human body detection module receives the reference signal from the transmitter included in the second human body detection module and detects that the event is generated because the difference between the measured intensity of the received reference signal and the reference intensity is greater than a specific threshold The event information is transmitted to the transmitter disposed below.
The method of claim 4,
The transmitter included in the second human body detection module transmits the reference signal to the receiver included in the first human body detection module and if the event information is received, the event information together with the reference signal is also included in the first human body detection module Receiver,
The receiver included in the second human body detection module receives the reference signal from the transmitter included in the first human body detection module and detects that the event is generated because the difference between the measured intensity of the received reference signal and the reference intensity is greater than a specific threshold The event information is transmitted to the transmitter disposed below.
The method of claim 5,
The second human body detection module,
And transmits the collected event information to a neighboring human body detection module.
The method of claim 5,
The second human body detection module,
And transmits the collected event information to the engine controller.
The method according to claim 1,
The reference intensity,
And the strength of the reference signal measured by the receiver when there is no human body between the transmitter and the receiver.
The method of claim 8,
The reference intensity,
And each receiver has an independent value.
The method of claim 9,
The reference intensity,
And the average value of the intensity of the reference signal measured by the receiver for a predetermined period when there is no human body between the transmitter and the receiver.
In a human body detection system of a screen door,
A transmission human body detection module installed on one side of the screen door and including a plurality of transmitters; And
And a receiving human body detecting module installed on the other side of the screen door to face the first human body detecting module and including a plurality of receivers,
The transmitter,
The reference signal is transmitted to the door open / close region which is an area where the screen door is opened and closed,
The receiver,
And measures the intensity of the reference signal received from the transmitter and detects that an event has occurred if the difference between the measured intensity and the reference intensity is greater than or equal to a specific threshold value.
The method of claim 11,
The receiving human body detecting module,
And transmits the collected event information to a neighboring received human body detection module.

Images