KR102519082B1 - Method for predicting train stop time and controlling platform screen door - Google Patents

Abstract

The present invention receives detection signals from the kth to k+2th photo sensors installed on the kth to k+2th doors at the platform where the 1st to Nth doors where the photo sensors are respectively installed are located, Calculates a first speed change function, which represents the speed at the time when passing through the door of the platform, (1 ≤ k ≤ N-2, k is a natural number), and the train stops at the right-position at the door k + 2 A second speed change function representing the speed against time until Provided is a method for predicting a stop time of a train and controlling a screen door, which determines the opening time of the Nth door.

Description

Prediction of train stopping time and screen door control method { METHOD FOR PREDICTING TRAIN STOP TIME AND CONTROLLING PLATFORM SCREEN DOOR }

The present invention relates to a method for predicting a stop time of a train using a photo sensor and controlling opening and closing of a screen door therefrom.

The screen door is a safety facility installed on the platforms of urban railways and metropolitan railways. Passengers falling onto the track can be prevented by opening the door of the screen door when the train stops at the platform and closing the door of the screen door before departing from the platform after the train picks up passengers.

Various methods of controlling the screen door have been developed and operated. In the control method through interlocking with the automatic train driving device, the automatic driving device mounted on the train transmits a signal to the screen door to control the opening and closing of the door. Although this method is universally used, there are disadvantages in that an automatic driving device must be installed in the train and the screen door can be controlled only when the train is stopped in the right position.

The method of stopping the train at the correct position and detecting the door using the photo sensor is to install the photo sensor at the defined position and the door at the platform, and then, according to the on-off signal transmitted by the photo sensor, the train It is a method of determining whether the vehicle is stationary or not, and detecting and controlling the open/closed state of the door. This method does not require an automatic driving device to be installed on the train, but the screen door can be controlled only when the train is stopped in the right position. In addition, depending on the installation location of the photo sensor, there is a disadvantage that cannot be applied to a platform where trains of different sizes enter and exit.

In the distance measurement method using an ultrasonic sensor, an ultrasonic sensor is installed at a defined position on the platform, the ultrasonic sensor is used to measure the distance from the train, and then it is determined whether the train is stopped at the fixed position to open or close the door. way to control. This method has a disadvantage in that the screen door can be controlled only when the train stops at the correct position, and there is no countermeasure until repair when a failure occurs in the ultrasonic sensor.

The train entry and stop detection method using photo sensors determines the stationary state of the train using photo sensors installed from the train entrance to the exit section of the platform, and then opens and closes the door when the train stops at the defined stop position. way to control. This method does not require an automatic driving device to be installed in the train, but has a disadvantage in that the screen door can be controlled only when the train stops at a defined stop position.

Therefore, there is a demand for a method of controlling a screen door without the need to mount an automatic train driving device on the train and without the train stopping at a predefined stop position or stop position on the platform.

An object of the present invention is to solve the above problems, and to provide a method for predicting a stop time of a train using a photo sensor and controlling opening and closing of a screen door therefrom.

In order to achieve the above object, the present invention provides the k to k + 2 th photo sensors installed on the k th to k + 2 th doors in the platform where the 1 th to N th doors are located, respectively. Receives a detection signal from, calculates a first speed change function representing the speed at the time when the train passes through the door of the platform, (1≤k≤N-2, k is a natural number), and the train Calculate a second speed change function, which represents the speed with respect to time until the car stops at the stop at the door 2, and input the reference speed of the adjacent stop into the second speed change function to calculate the predicted time of the adjacent stop, Provided is a method for predicting a stop time of a train and controlling a screen door, which determines the opening time of the first to Nth doors by reflecting the corrected time.

In addition, the first speed change function provides a method for predicting a stop time of a train and controlling a screen door as shown in Equation A below.

[Equation A]

는 제 k 출입문과 제 k+1 출입문 사이에서 열차의 평균 속도 /

는 제 k+1 출입문과 제 k+2 출입문 사이에서 열차의 평균 속도 /

는 제 k 출입문과 제 k+1 출입문 사이에서 열차의 이동 시간 /

는 제 k+1 출입문과 제 k+2 출입문 사이에서 열차의 이동 시간 /

는 열차가 제 k 출입문을 통과할 때의 시각 /

는 열차가 제 k 출입문을 통과할 때와 제 k+1 출입문의 통과할 때의 중간 시각 /

는 상기 제 1 속도 변화 함수).(

is the average speed of the train between the kth door and the k+1th door /

is the average speed of the train between the k + 1 door and the k + 2 door /

is the travel time of the train between the kth door and the k+1th door /

is the travel time of the train between the k+1 door and the k+2 door /

is the time when the train passes through the kth door /

is the intermediate time between when the train passes through the kth door and when it passes through the k+1th door /

Is the first rate change function).

In addition, the second speed change function provides a method for predicting train stopping time and controlling a screen door, as shown in Equation B below.

[Equation B]

는 열차가 제 k+2 출입문을 통과할 때의 시각 /

는 열차가 제 k+2 출입문을 통과할 때의 속도 /

는 정-위치 정차 예상 시각 /

는 상기 제 2 속도 변화 함수).(

is the time when the train passes through the k+2 door /

is the speed at which the train passes through the k+2 door /

is the expected time of the fixed-position stop /

Is the second rate change function).

In addition, a method for predicting a stop time of a train and controlling a screen door is provided, which calculates the predicted time of the adjacent stop according to the following Equation C.

[Equation C]

는 열차가 제 k+2 출입문을 통과할 때의 시각 /

는 열차가 제 k+2 출입문을 통과할 때의 속도 /

는 정-위치 정차 예상 시각 /

는 상기 인접 정차 기준 속도 /

는 상기 인접 정차 예상 시각).(

is the time when the train passes through the k+2 door /

is the speed at which the train passes through the k+2 door /

is the expected time of the fixed-position stop /

is the reference speed of the adjacent stop /

is the expected time of the adjacent stop).

In addition, a method for estimating train stop time and controlling a screen door is provided, in which, when a photo sensor fails, a detection signal is received from another photo sensor positioned adjacent thereto and the first speed change function is calculated.

Then, when the opening time comes, a control command is transmitted to open the first to Nth doors, and when the front end of the train approaches the departure detection unit, a control command is sent to close the first to Nth doors, or Provided is a method for predicting stop time of a train and controlling a screen door, which transmits a control command to close the first to Nth doors when the rear end passes through the first to Mth photo sensors.

According to the present invention, since there is no need to mount an automatic train driving device on a train, the screen door can be controlled when a manually driven train stops at a platform. In addition, since the control is possible even if the train does not stop at a predefined stop position or stop position on the platform, the screen door can be controlled without being limited by the size of the train.

1 is a diagram schematically illustrating a configuration in which a photosensor is installed in a platform in an embodiment of the present invention.
2 is a block diagram schematically illustrating an apparatus for predicting a stop time of a train and controlling a screen door according to an embodiment of the present invention.
FIG. 3 is a graph briefly illustrating the speed for each time when a train stops at a platform, according to an embodiment of the present invention.
4 is a flowchart briefly illustrating a method for predicting a stop time of a train and controlling a screen door according to an embodiment of the present invention.

The present invention can be variously modified and practiced without departing from the gist, and may have one or more embodiments. In addition, the embodiments described in the "specific contents for carrying out the invention" and "drawings" in the present invention are examples for specifically explaining the present invention, and do not limit or limit the scope of the present invention.

Therefore, what can be easily inferred from the “specific details for carrying out the invention” and “drawings” of the present invention by those skilled in the art to which the present invention belongs is construed as belonging to the scope of the present invention. can do.

In addition, the size and shape of each component shown in the drawings may be exaggerated for description of the embodiment, and does not limit the size and shape of the actual invention.

Terms used in the specification of the present invention may have the same meaning as commonly understood by a person of ordinary skill in the art to which the present invention belongs unless specifically defined.

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

1 is a diagram schematically illustrating a configuration in which a photosensor is installed in a platform in an embodiment of the present invention.

By executing the method for predicting the stopping time of a train and controlling a screen door according to an embodiment of the present invention, the door of the platform 10 shown in FIG. 1 can be opened according to the stop of the train 20 or It can be closed according to departure.

After the train 20 stops, the platform 10 has one or more platforms so that passengers in the train 20 can get off at the platform 10 and passengers in the platform 10 can board the train 20. An entrance door (E ₁ to E _N ) may be included. When the train 20 enters the platform 10, the first door (E ₁ ), the second door (E ₂ ), the third door (E ₃ ), the fourth door (E ₄ ), ... , The first to Nth doors E ₁ to E _N may be sequentially positioned to pass through the Nth doors E _N . Next to the Nth door (E _N ), which is the last door, a departure detection unit 11 may be positioned to detect whether or not the stopped train 20 is departing. Between the Nth entrance door E _N and the departure detection unit 11, a stationary-positioning unit 12 may be located where the front end of the train 20 stands when the train 20 stops at the stationary position.

One door may be spaced apart from another adjacent door. The first entrance door (E ₁ ) and the second entrance door (E ₂ ) may be positioned at a first distance (L ₁ ), and the second entrance door (E ₂ ) and the third entrance door (E ₃ ) are located at a second distance ( L ₂ ) can be placed. That is, the i th door (E _i ) and the i+1 th door (E _i+1 ) may be located at an i th distance (L _i ). (1≤i≤N-1, i is a natural number)

One photo sensor S ₁ to S _N may be installed on the first to Nth doors E ₁ to E _N , respectively. The first to Nth photo sensors (S ₁ to S _N ) installed at the first to Nth doors (E ₁ to E _N ), respectively, are used to detect whether or not the train 20 has stopped at the platform 10. can In one embodiment of the present invention, when the train 20 does not stop at the platform 10, the first to Nth doors E ₁ to E _N may be controlled not to be opened. In addition, even if the train 20 does not exactly stop at a predefined stop position or stop position but stops adjacent thereto, the first to Nth doors E ₁ to E _N may be controlled to be opened.

A departure detection photo sensor _SD can be installed in the departure detection unit 11 . The departure detection photo sensor S _D can be used to detect whether or not the train 20 has departed from the platform 10 . In one embodiment of the present invention, when the front end of the train 20 approaches the departure detection unit 11, the first to Nth doors E ₁ to E _N may be controlled to be closed. When the front end of the train 20 stops while passing the departure detection unit 11 or a failure occurs in the departure detection photo sensor S _D , the rear end of the train 20 detects the first to M photo sensors S ₁ When passing through ~ S _M ), the first to N th doors (E ₁ to E _N ) may be controlled to be closed. M may be, for example, three.

The first to Nth photo sensors (S ₁ to S _N ) and the departure detection photo sensor (S _D ) may be connected to the apparatus 100 for estimating train stop times and controlling screen doors.

The train stopping time prediction and screen door control device 100 may be located in the platform 10, and may be directly connected to the first to Nth photo sensors S ₁ to S _N and the departure detection photo sensor S _D . can Alternatively, the train stop time prediction and screen door control device 100 may be located outside the platform 10, and the first to Nth photo sensors S ₁ to S _N and the departure detection photo sensor _SD and wired It can be connected through a sensor network or a wireless sensor network.

2 is a block diagram schematically illustrating an apparatus for predicting a stop time of a train and controlling a screen door according to an embodiment of the present invention.

The apparatus 100 for predicting a stop time of a train and controlling a screen door may include a central processing unit 110 , a memory unit 120 , an input/output unit 130 , and a bus 140 .

The central processing unit 110 executes a method for predicting train stopping time and controlling a screen door according to an embodiment of the present invention, and executes instructions of a computer program stored in a recording medium so that the method can be read by a computer. It can be executed as-is or according to branching and iterating conditions.

The memory device 120 may include a main memory device 121 and an auxiliary memory device 122 .

The main memory device 121 may read a computer program for predicting train stopping time and control a screen door, and cause the central processing unit 110 to read commands of the computer program. The main memory device 121 may be RAM (Random Access Memory).

The secondary storage device 122 may semi-permanently store computer programs for predicting train stop times and controlling screen doors. The auxiliary storage device 122 includes a hard disk drive, an optical disk drive, a magnetic tape, a floppy disk, a memory card, and a solid SSD (SSD). State Drive) may include one or more.

The input/output device 130 may receive optical signals from the first to Nth photo sensors S ₁ to S _N and the start detection photo sensor _SD . Also, the input/output device 130 may transmit or receive data between other devices.

The input/output device 130 may include an external input/output terminal (I/O port). External I/O ports include serial port, parallel port, SCSI (Small Computer System Interface), USB (Universal Serial Bus), IEEE 1394, e-SATA (external Serial Advanced Technology) Attachment) and Thunderbolt.

The input/output device 130 may include a network interface controller (NIC). The network interface controller (NIC) connects to a Local Area Network (LAN) based on Ethernet in a wired manner, or to a Wireless Local Area Network (WLAN) based on Wi-Fi in a wireless manner or wireless It can connect to a wireless wide area network (WWAN).

The input/output device 130 may include a Bluetooth module or a Zigbee module, and may be connected to a wireless personal area network using the Bluetooth module.

The bus 140 may connect the central processing unit 110 , the memory device 120 , and the input/output device 30 . Components coupled to bus 140 may transmit or receive binary data over bus 140 .

FIG. 3 is a graph briefly illustrating the speed for each time when a train stops at a platform, according to an embodiment of the present invention.

According to an embodiment of the present invention, first and second speed change functions F(x) and F′(x) representing the speed graph for each time shown in FIG. 3 are calculated, and then the train 20 It is possible to predict the stopping time and control the opening and closing of the first to Nth doors (E ₁ to E _N ).

In addition, in an embodiment of the present invention, in a platform where the 1st to Nth doors where the photo sensors are installed are located, detection signals from the kth to k+2th photo sensors installed on the kth to k+2th doors is received to calculate a first speed change function, which represents the speed at the time when the train passes through the door of the platform, (1 ≤ k ≤ N-2, k is a natural number), and the train passes through the door at the k + 2 Calculate a second speed change function representing the speed for time until the car stops at the right position, input the reference speed of the adjacent stop to the second speed change function to calculate the estimated time of the adjacent stop, and calculate the corrected time It is possible to determine the opening time of the first to Nth doors by reflection.

The train 20 can pass through the first to Nth doors E ₁ to E _N at the first to N detection times T ₁ to T _N , respectively. Further, the train 20 may pass between the i th door E _i and the i+1 th door E _i+1 located in the next order adjacent thereto during the i th travel time D _i . The i th travel time (D _i ) can be calculated as in Equation 1 below. (1≤i≤N-1, i is a natural number)

는 열차(20)가 제 i 출입문(E_i)을 통과할 때의 시각인, 제 i 검지 시각(T_i)을 나타낸다.

는, 열차(20)가 제 i+1 출입문(E_i+1)을 통과할 때의 시각인, 제 i+1 검지 시각(T_i+1)을 나타낸다.

represents the i th detection time T _i , which is the time when the train 20 passes through the i th door E _i .

represents the i+1 th detection time T _{i+1 , which is the time when the train 20 passes through the i+1 th door E i+ 1} .

The i average speed (V i ), which is the average speed when the train 20 passes between the i _th door (E _i ) and the i+1 th door (E _i+1 ), is calculated as in Equation 2 below: can do.

는 제 i 출입문(E_i)과 제 i+1 출입문(E_i+1) 사이의 거리인, 제 i 간격(L_i)을 나타낸다.

는 수학식1에서 산출한 제 i 이동 시간(D_i)을 나타낸다.

Represents the i-th distance _{L i} , which is the distance between the i-th door E i and the _i+1-th door E i+1 .

Represents the i th travel time (D _i ) calculated in Equation 1.

In one embodiment of the present invention, the detection time and average speed may be calculated using a photosensor. In addition, when the average speed is less than or equal to the measurement reference speed V _s and has a decreasing trend, first and second speed change functions F(x) and F'(x) may be calculated.

For example, by using the kth to k+2th photo sensors (S _k , S _k+1 , and SK ₊₂ ), the train 20 uses the kth to k+2th doors (E _k , E _{k +1} and E _k+3 ), respectively, k to k+2 detection times (T _k , T _k+1 , T _k+2 ) can be measured. (1≤k≤N-2, k is a natural number) And using Equation 1 and Equation 2, the average speed when passing between the kth and k+1th doors (E _k , E _k+1 ) The k-th average speed (V _k ) and the _{k+1 -} th average speed (V _{k +1} ) can be calculated. The k th average speed (V _k ) and the k+1 th average speed (V _k+1 ) are less than or equal to the measurement reference speed (V _s ), and the k th average speed (V _k ) is the k+1 th average speed (V _{k +1} ) and the correction speed (V _offset ) (V _k >V _k+1 +V _offset ), by inputting the values calculated in Equations 1 and 2 into Equation 3 below, The speed change function F(x) can be calculated. The correction speed (V _offset ) is a value for correcting when the train 20 stops while repeating acceleration and deceleration below the measurement reference speed (V _s ).

는 제 k 평균 속도(V_k)를 나타내고,

는 제 k+1 평균 속도(V_k+1)를 나타낸다.

는 열차(20)가 제 k 출입문(E_k)에서 제 k+1 출입문(E_k+1)으로 이동할 때의 시간인, 제 k 이동 시간(D_k)을 나타낸다.

는 열차(20)가 제 k+1 출입문(E_k+1)에서 제 k+2 출입문(E_k+2)으로 이동할 때의 시간인, 제 k+1 이동 시간(D_k+1)을 나타낸다.

는 제 k 검지 시각(T_k)과 제 k+1 검지 시각(T_k+1) 사이의 중간인 제 k 중간 시각(TH_k)을 나타낸다. 열차(20)가 등가속도로 진행하는 경우, 제 k 중간 시각(TH_k)에서 제 k 평균 속도(V_k)를 가질 수 있고, 열차(20)의 제 1 속도 변화 함수(F(x))는 수학식3의

와 같을 수 있다.

Represents the kth average velocity (V _k ),

denotes the k+1 th average velocity (V _k+1 ).

denotes the k th travel time (D k ), which is the time when the train 20 moves from the k th door (E _k ) to the k+ _{1 th door (E k+1 )} .

represents the k+1 th travel time (D _k+1 ), which is the time when the train 20 moves from the k+1 th door (E k+1 ) to the k+2 th door (E _{k+2 ).} .

represents the k th intermediate time point TH _k , which is midway between the k th detection time point T k and the _k+1 th detection time point T _k +1 . When the train 20 proceeds at a constant acceleration, it may have a k th average speed (V _k ) at the k th intermediate time point (TH _k ), and the first speed change function (F(x)) of the train 20 is in Equation 3

can be equal to

The kth to k+2th photo sensors (S _k , S _k+1 , SK ₊₂ ) are the N-2th to Nth doors (E _k , E _k+1 ) located at the rear end of the platform 10 . , E _{K + 2} ), respectively, the N-2 to Nth photo sensors (S _N-2 , S _N-1 , and S _N ) are preferably installed, but are not limited thereto and may be photo sensors located at other doors. . In addition, a photo sensor installed on the door located in succession is preferable, but when a failure occurs in one photo sensor, the detection time can be measured by including the photo sensor installed on the door located in the previous or next order. For example, if a failure occurs in the k+2 th photo sensor (S _K+2 ), it is detected using the k-1 th to k+1 th photo sensors (S _k-1 , S _k , SK ₊₁ ) After measuring the time, it is possible to calculate the first speed change function (F(x)) by inputting it into Equations 1 to 3.

)를 산출할 수 있다.After calculating the first speed change function (F(x)) when the train 20 passes through the door by using the photo sensor, the second speed change, which is the speed change function until the train 20 stops A function F'(x) can be calculated. For example, first, the speed when passing through the k + 2 th door (E _{k + 2} ) as shown in Equation 4 (

) can be calculated.

는 열차(20)가 제 k+2 출입문(E_k+2)을 통과할 때의 시각인, 제 k+2 검지 시각(T_k+2)을 나타낸다.

과

은 수학식3에서 산출한 파라미터이다.

represents the k+2 th detection time T _k+2 , which is the time when the train 20 passes through the k+2 th door E _k+2 .

class

Is a parameter calculated in Equation 3.

The second speed change function F'(x) can be assumed as shown in Equation 5 below.

는 수학식4에서 산출한, 열차(20)가 제 k+2 출입문(E_k+2)을 통과할 때의 속도를 나타낸다.

는, 열차(20)의 선단이 정-위치부(12)에 위치하여 열차(20)가 정-위치에 정차할 때를 예상한 시각인, 정-위치 정차 예상 시각(T_s)을 나타내며, 다음 수학식6과 수학식7에 따라 산출할 수 있다.

Represents the speed when the train 20 passes through the k+2th door (E _k+2 ), calculated in Equation 4.

Represents the predicted stopping time (T _s ), which is the time when the front end of the train 20 is located at the fixed-position part 12 and the train 20 is expected to stop at the fixed-position, It can be calculated according to Equations 6 and 7 below.

은 제 k+2 출입문(E_k+2)에서 정-위치부(12)까지의 거리를 나타낸다. 수학식6의 등가식인 다음 수학식7로부터, 열차(20)의 정차 시간(T_s)을 산출할 수 있다.

Denotes the distance from the k+2th door E _k+2 to the regular-positioning part 12 . From the following Equation 7, which is equivalent to Equation 6, the stopping time T _s of the train 20 can be calculated.

In one embodiment of the present invention, assuming that the train 20 does not exactly stop at a predefined stop position but stops adjacent thereto, the first to Nth stop times before the expected stop time (T _s ) It can be controlled to open the door (E ₁ ~ E _N ). In order to determine the opening times (T _o ) of the first to Nth doors (E ₁ to E _N ), first, the expected time of the adjacent stop when the speed of the train 20 decreases to the reference speed (V _h ) of the adjacent stop. (T _e ) can be calculated as in Equation 8 after using the second speed change function (F'(x)).

과

은 수학식5에서 산출한 파라미터이다.

class

Is a parameter calculated in Equation 5.

In an embodiment of the present invention, the first to Nth doors E ₁ to E _N are opened before the expected time of the adjacent stop T _e , so that passengers can board and get off smoothly. Accordingly, the opening times T _o of the first to Nth doors E ₁ to E _N may be calculated as in Equation 9 below.

는 인접 정차 예상 시각(T_e) 전, 제 1 내지 제 N 출입문(E₁ ~ E_N)을 개방하기 위하여 결정한 보정 시간을 나타낸다.

Represents the correction time determined to open the first to Nth doors (E ₁ to E _N ) before the predicted time of the adjacent stop (T _e ).

In one embodiment of the present invention, when a failure occurs in some photosensors, the opening time T _o may be predicted using the photosensors located in the following order. For example, when a failure occurs in the k+1 th sensor (S k+1 ) among the k th to k+2 th photo sensors (S _k , S _k+1 , and S _{k+2 )} , the first sensor located in the following order The first and second velocity change functions F(x) and F′(x) may be calculated using the k+3 photosensor S _k+3 . That is, after calculating Equations 1 to 9 using the k, k+2, and k+3 photosensors (S _k , S _k+2 , and S _k+3 ), the opening time T _o Predictable.

4 is a flowchart briefly illustrating a method for predicting a stop time of a train and controlling a screen door according to an embodiment of the present invention.

The first step (S100) is a step of detecting the passage of the train 20.

The first to Nth photo sensors (S ₁ to S _N ) detect when the train 20 passes, and transmit a detection signal to the device 100 for predicting the stop time of the train and controlling the screen door. The central processing unit 110 calculates the first to _Nth detection times T 1 to T _N according to the signals transmitted by the first to Nth photosensors S ₁ to S _N .

The second step (S200) is a step of calculating the first speed change function (F(x)).

The central processing unit 110 calculates a first speed change function F(x) from detection time information calculated by receiving detection signals from a plurality of photosensors. For example, the central processing unit 110 receives detection signals from the kth to k+2th photo sensors (S _k , S _k+1 , and SK ₊₂ ) and calculates k to k+2 detection times. By entering (T _k , T _k+1 , T _k+2 ) into Equation 1, the kth movement, which is the time when moving from the kth door (E _k ) to the k+1th door (E _k+1 ) Calculate the time (D _k ) and the k+1 th travel time (D _k+1 ), which is the time when moving from the k+1 th door (E k+1 ) to the k+2 th door (E _{k+2 )} do. (1≤k≤N-2, k is a natural number) Also, the CPU 110 calculates the k th travel time (D _k ) and the k+1 th travel time (D _k+1 ) in Equation 2 input, the k th average speed (V _k ), which is the average speed when passing between the k th and K + 1 th doors (E _k , E _{k + 1} ), and the k + 1 th and k + 2 th doors ( The _k+ 1st average speed (V _k+1 ), which is the average speed when passing between E k+1 and E _k+2 ), is calculated. Finally, the CPU 110 inputs the values calculated in Equations 1 and 2 into Equation 3 to calculate the first speed change function F(x).

In the second step (S200), the k th average speed (V _k ) and the k+1 th average speed (V _k+1 ) are equal to or less than the measurement reference speed (V _s ), and the k th average speed (V _k ) is the first When it is greater than the sum of the k+1 average velocity (V _k+1 ) and the corrected velocity (V _offset ) (V _k >V _k+1 +V _offset ), it can proceed.

Further, when a failure occurs in the photo sensor, a detection signal is received from another photo sensor located adjacently to calculate the first speed change function. That is, when a failure occurs in H photo sensors among the kth to k+2th photo sensors (S _k , S _k+1 , and SK ₊₂ ), the k-3th to k-1th photosensors located in the previous order Among the sensors (S _k-3 , S _k-2 , and SK _-1 ) and the k+3th to k+5th photo sensors (S _k+3 , S _k+4 , and S _k+5 ) located in the following order , Enter the detection time calculated by receiving detection signals from H photo sensors located close to the kth to k+2th photo sensors (S _k , S _k+1 , SK ₊₂ ) in Equation 1, The first speed change function F(x) may be calculated by sequentially inputting the calculated values into Equations 2 and 3.

The third step (S300) is a step of calculating the second speed change function (F'(x)).

The central processing unit 110 calculates the first speed change function F(x) when the train 20 passes through the door, and then calculates the first speed change function F(x) until the train 20 stops. 2 Calculate the speed change function F'(x). For example, the central processing unit 110 inputs the k+2 th detection time (T _k+2 ) into Equation 3 so that when the train 20 passes through the k+2 th door (E _k+2 ), Calculate the speed (F(T _k+2 )) of The central processing unit 110 inputs the speed (F(T k+2 )) when the train 20 passes through the k+2th door (E k _{+ 2} ) into Equation 7, The expected stop time (T _s ) is calculated. Finally, the CPU 110 inputs the values calculated in Equations 3 and 7 into Equation 5 to calculate the second speed change function F'(x).

A fourth step (S400) is a step of determining an opening time (T _o ).

The CPU 110 inputs the reference speed V _h of the adjacent stop into Equation 8, and calculates the estimated time of the adjacent stop T _e . Then, the central processing unit 110 inputs the calculated predicted time of the adjacent stop (T _e ) into Equation 9 to determine the open time (T _o ).

A fifth step (S500) is a step of opening the first to Nth doors E ₁ to E _N .

The central processing unit 110 issues a control command to the first to Nth doors E ₁ to E _N to open the first to N th doors E ₁ to _{E N} when the opening time T _o arrives. send

A sixth step (S600) is a step of closing the first to Nth doors E ₁ to E _N .

When the front end of the train 20 approaches the departure detection unit 11, the central processing unit 110 closes the first to Nth doors E ₁ to E _N so as to close the first to Nth doors E ₁ ~ E _N ) to transmit control commands.

Alternatively, when the front end of the train 20 stops while passing the departure detection unit 11 or a failure occurs in the departure detection photo sensor S _D , the rear end of the train 20 detects the first to M photo sensors S ₁ to S _M ), the central processing unit 110 controls the first to Nth doors E ₁ to E _N to close the first to Nth doors E ₁ to E _N . send the command M may be, for example, three.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and may vary within the scope of the detailed description of the invention and the accompanying drawings, as long as the spirit and effect of the present invention are not impaired. It can be implemented by making changes. It goes without saying that such embodiments fall within the scope of the present invention.

10: Platform
11: Departure detection unit
12: forward-position part
E ₁ ~ E _N : 1st to Nth doors
S ₁ ~ S _N : 1st to Nth photosensors
20: Train
100: train stopping time prediction and screen door control device
110: central processing unit
120: storage device
130: I/O device
140: bus

Claims (6)

At the platform where the first to Nth doors are installed with photo sensors, respectively,
Receiving detection signals from the kth to k+2th photo sensors installed at the kth to k+2th doors, calculating the first speed change function representing the speed at the time when the train passes through the platform door and (1≤k≤N-2, k is a natural number)
Calculate a second speed change function, which represents the speed with respect to time until the train stops at the k + 2 door,
The adjacent stop standard speed is input into the second speed change function to calculate the predicted adjacent stop time, and then the correction time is reflected to determine the opening time of the first to Nth doors;
The first speed change function is as shown in Equation A below,
Method for predicting train stopping time and controlling screen door
[Equation A]

(

is the average speed of the train between the kth door and the k+1th door /

is the average speed of the train between the k + 1 door and the k + 2 door /

is the travel time of the train between the kth door and the k+1th door /

is the travel time of the train between the k+1 door and the k+2 door /

is the time when the train passes through the kth door /

is the intermediate time between when the train passes through the kth door and when it passes through the k+1th door /

Is the first rate change function).
delete The method of claim 1,
The second speed change function is as in Equation B below,
Method for predicting train stopping time and controlling screen door
[Equation B]

(

is the time when the train passes through the k+2 door /

is the speed at which the train passes through the k+2 door /

is the expected time of the fixed-position stop /

Is the second rate change function).
The method of claim 3,
Calculating the predicted time of the adjacent stop according to the following Equation C,
Method for predicting train stopping time and controlling screen door
[Equation C]

(

is the time when the train passes through the k+2 door /

is the speed at which the train passes through the k+2 door /

is the expected time of the fixed-position stop /

is the reference speed of the adjacent stop /

is the expected time of the adjacent stop).
The method of claim 1,
When a failure occurs in the photo sensor, receiving a detection signal from another photo sensor located adjacent to calculate the first speed change function,
Prediction of train stopping time and method of controlling screen doors.
The method of claim 1,
Sending a control command to open the first to Nth doors when the opening time comes,
When the front end of the train approaches the departure detection unit, a control command is sent to close the first to Nth doors, or
Sending a control command to close the first to Nth doors when the rear end of the train passes through the first to Mth photo sensors,
Prediction of train stopping time and method of controlling screen doors.

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