A method and device for detecting passenger capacity distribution in subway cars based on acceleration process

Abstract

The present invention relates to the field of rail transit, and in particular to a method and device for detecting the passenger capacity distribution of a subway car based on an acceleration process. The distribution detection method comprises: obtaining the current train running state parameters, calculating the equivalent traction force immediately contributed by each drive motor; obtaining the pull / pressure value between each car during the constant acceleration process of the train after leaving the station, and calculating the total weight of each car based on the equivalent traction force of each drive motor and the instantaneous acceleration of the train; calculating the number of people in each car based on the total weight of each car; and obtaining the passenger capacity distribution of the subway car based on the number of people in each car. The present invention provides a new idea for detecting the passenger capacity distribution of subway cars and provides data support for the passenger flow guidance system.

Description

Technical Field

[0001] The present invention relates to the field of rail transportation, and in particular to a method and device for detecting the passenger capacity distribution of a subway car based on an acceleration process. Background Art

[0002] With the development of rail transportation, subways have taken an important position in rail transportation and become the first choice for urban travel due to their fast and convenient, wide coverage, and high operating efficiency. However, in actual operation, some carriages are often severely crowded while others are still empty. Such uneven distribution of subway passenger load will weaken the utilization rate of subway carriages and the riding comfort of passengers. On the other hand, the uneven distribution of passenger volume will lead to unbalanced load on trains, seriously affecting the operating life of trains. At the same time, if an emergency occurs, the efficiency of passenger evacuation will be greatly reduced, which will cause serious stampede accidents. Summary of the invention

[0003] In order to solve the above problems, the object of the present invention is to provide a method and device for detecting the passenger capacity distribution of a subway car based on an acceleration process.

[0004] The objective of the present invention is achieved through the following technical solutions:

[0005] A method for detecting the passenger capacity distribution of a subway car based on an acceleration process comprises the following steps:

[0006] Step 1, obtaining the current train running state parameters, including the instantaneous acceleration of the train during the constant acceleration process after leaving the station, the power of each driving motor, and the instantaneous running speed of the train, so as to calculate the equivalent traction force immediately contributed by each driving motor;

[0007] Step 2, obtaining the pulling / pressing force values ​​between the carriages during the constant acceleration of the train after leaving the station, and calculating the total weight of each carriage by combining the equivalent traction force of each driving motor and the instantaneous acceleration of the train obtained in step 1;

[0008] Step 3, calculating the number of people in each carriage according to the total weight of each carriage obtained in step 2;

[0009] Step 4, obtaining the passenger capacity distribution of the subway cars according to the number of people in each car in step 3.

[0010] Furthermore, in step 1, the equivalent traction force F contributed instantly by each driving motor is t The calculation method is as follows:

[0011]

[0012] Among them, P represents the sum of the power of each driving motor, a is the instantaneous acceleration of the train, v is the instantaneous running speed of the train, g is the acceleration of gravity, f is the average resistance coefficient of the train operation, Q represents the total number of carriages, and X represents the number of trailer carriages.

[0013] Furthermore, in step 2, the total weight of each carriage M i The calculation method is as follows:

[0014]

[0015] Among them, Q is the total number of carriages, M i (i=1,2,3,4,...,Q) represents the total weight of the i-th carriage, where the first carriage and the Q-th carriage are trailers with cabs, and there is no articulation between the cab and the passenger area; M 1j , M Qj Respectively represent the deadweight of the driving area of ​​the first carriage and the Qth carriage; F i,i+1 F represents the tension / pressure value measured by the tension / pressure sensor at the hinge between the i-th carriage and the i+1-th carriage; t is the equivalent traction of each driving motor; a is the instantaneous acceleration of the train, v is the instantaneous running speed of the train, g is the acceleration of gravity, and f is the average resistance coefficient of the train operation.

[0016] Furthermore, in step 3, the calculation method of the number of people in each carriage is as follows:

[0017]

[0018] Among them, M i (i=1,2,3,4,...,Q) represents the total weight of the i-th carriage, m i (i=1,2,3,4,...,Q) represents the deadweight of the i-th carriage, m h represents the average weight of a person, n i (i=1,2,3,4,...,Q) represents the number of people in the i-th carriage, and Q is the total number of carriages.

[0019] Furthermore, in step 4, the passenger capacity distribution of subway cars is divided into five levels, namely, empty, empty, full, relatively crowded, moderately crowded, and severely crowded; the classification method is as follows:

[0020]

[0021] Among them, n i (i=1,2,3,4,...,Q) represents the number of people in the i-th carriage, N i (i=1,2,3,4,...,Q) represents the number of seats in the i-th carriage, and Q is the total number of carriages.

[0022] The present invention also relates to a subway car passenger capacity distribution detection device based on the acceleration process, the device comprising: a train monitoring information reading device, a tension and pressure sensor and a single-chip computer data processing unit;

[0023] The train monitoring information reading device is installed in the cab and is used to read the train monitoring recording device to obtain the train running status parameters, including the train's instantaneous acceleration, the train's driving motor power, and the train's instantaneous running speed;

[0024] The tension / compression sensors are installed at the hinges of each carriage, and the detected tension / compression values ​​reflect the relationship between the total weight of the train in front and rear of the hinge;

[0025] The single chip data processing unit is used to receive train running status parameters and tension / pressure values, and calculate the passenger capacity of each subway car based on them.

[0026] The beneficial effects of the present invention are:

[0027] The passenger capacity distribution detection method of the present invention detects the tension / pressure at the hinge of each carriage through a tension / pressure sensor, and calculates the passenger capacity of each carriage according to the train running state parameters, thereby realizing the passenger capacity distribution detection of each subway carriage. The present invention provides a new idea for the passenger capacity distribution detection of subway carriages and provides data support for the passenger flow guidance system. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the installation position of the subway car passenger capacity distribution detection device of the present invention on a subway train;

[0029] Figure 2 A schematic diagram of the process of passenger capacity distribution detection based on a subway car passenger capacity distribution detection device;

[0030] Among them, 1-train monitoring information reading device, 2-single chip data processing unit, 3-tension pressure sensor, 4-trailer carriage, 5-motor vehicle carriage. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] A method for detecting the passenger capacity distribution of a subway car based on an acceleration process comprises the following steps:

[0033] Step 1: Obtain the current train running status parameters, including the instantaneous acceleration of the train during the constant acceleration process after leaving the station, the power of each drive motor, and the instantaneous running speed of the train, so as to calculate the equivalent traction force contributed instantly by each drive motor.

[0034] Among them, the equivalent traction force F contributed by each drive motor immediately t The calculation method is as follows:

[0035]

[0036] Where P is the sum of the power of each drive motor, a is the instantaneous acceleration of the train, v is the instantaneous running speed of the train, g is the acceleration of gravity, f is the average resistance coefficient of the train operation, which is calculated according to the empirical formula provided by the train manufacturer, Q is the total number of carriages, and X is the number of trailer carriages.

[0037] Step 2, obtain the tension / pressure value between each carriage during the constant acceleration process of the train after leaving the station, and calculate the total weight of each carriage by combining the equivalent traction force of each drive motor and the instantaneous acceleration of the train obtained in step 1.

[0038] Among them, the total weight of each carriage is M i The calculation method is as follows:

[0039]

[0040] Where Q is the total number of carriages, M is i (i=1,2,3,4,...,Q) represents the total weight of the i-th carriage, where the first carriage and the Q-th carriage are trailers with a cab, and the cab is separated from the passenger area by a partition without articulation; M 1j , M Qj Respectively represent the deadweight of the driving area of ​​the first carriage and the Qth carriage; F i,i+1 F represents the tension / pressure value measured by the tension / pressure sensor at the hinge between the i-th carriage and the i+1-th carriage; t is the equivalent traction of each driving motor; a is the instantaneous acceleration of the train, v is the instantaneous running speed of the train, g is the acceleration of gravity, and f is the average resistance coefficient of the train operation.

[0041] Step 3, calculate the number of people in each carriage according to the total weight of each carriage obtained in step 2.

[0042] The calculation method for the number of people in each carriage is as follows:

[0043]

[0044] In the formula, m i (i=1,2,3,4,...,Q) represents the deadweight of the i-th carriage, m hrepresents the average weight of a person, n i (i=1,2,3,4,...,Q) represents the number of people in the i-th carriage.

[0045] Step 4, obtaining the passenger capacity distribution of the subway cars according to the number of people in each car in step 3.

[0046] The passenger capacity distribution of subway cars is divided into five levels: empty, empty, full, relatively crowded, moderately crowded, and severely crowded. The classification method is as follows:

[0047]

[0048] Where n i (i=1,2,3,4,...,Q) represents the number of people in the i-th carriage, N i (i=1,2,3,4,...,Q) represents the number of seats in the i-th carriage.

[0049] According to the above classification standards, the passenger capacity distribution of subway cars can be displayed intuitively.

[0050] The present invention also provides a subway car passenger capacity distribution detection device based on the acceleration process, the device comprising: a train monitoring information reading device, a tension and pressure sensor and a single-chip computer data processing unit;

[0051] The train monitoring information reading device is installed in the cab and is used to read the train monitoring recording device to obtain the train running status parameters, including the train's instantaneous acceleration, the train's driving motor power, and the train's instantaneous running speed. The train monitoring information reading device is similar to the "black box" on an airplane. It collects relevant parameters and data through the train monitoring recording device, and then reads the train running status related parameters and data through the train monitoring information reading device.

[0052] The tension / compression sensors are installed at the hinges of each carriage, and the detected tension / compression values ​​reflect the relationship between the total weight of the train in front and rear of the hinge.

[0053] The single chip data processing unit is used to receive train running status parameters and tension / pressure values, and calculate the passenger capacity of each subway car based on them.

[0054] Example 1

[0055] Let's take the example of a four-to-two subway. Figure 1 As shown, the subway train has 6 carriages, including 4 motor car carriages and 2 trailer carriages. Figure 1 and Figure 2 , further illustrating the present invention.

[0056] Step 1: Obtain the current train running state parameters and determine the equivalent traction force F contributed by each drive motor immediately t The train monitoring information reading device installed in the cab obtains the instantaneous acceleration of the train during the constant acceleration process after leaving the station, the power of each of the four drive motors, and the instantaneous running speed of the train, and inputs them into the single-chip computer data processing unit, thereby determining the equivalent traction force F contributed by each drive motor at the moment. t :

[0057]

[0058] Where P represents the total power of each driving motor, a is the instantaneous acceleration of the train, v is the instantaneous running speed of the train, g is the acceleration of gravity, and f is the average resistance coefficient of the train operation, which is taken as 0.025.

[0059] Step 2: Get the total weight of each car in the current train. According to the tension and pressure sensors installed at the midpoint of the subway car articulation, the tension / pressure values ​​between the cars during the constant acceleration of the train after leaving the station can be obtained. This value is input into the single-chip microcomputer data processing unit and combined with the equivalent traction force F of each drive motor obtained in step 1. t , the instantaneous acceleration of the train a can be used to calculate the total weight M of each subway car i :

[0060]

[0061] Among them, M i (i=1,2,3,4,5,6) means Figure 1 The total weight of each of the six carriages of the medium-sized four-trailer-two type subway, in which, in particular, the first carriage and the sixth carriage are trailers with a driver's cab, and the driver's area and the passenger area are separated by a partition without articulation; M 1j , M 6j They represent the deadweight of the driving area of ​​the first car and the sixth car respectively. The deadweight is relatively fixed and has been determined during the manufacturing process of the subway. i,i+1 It represents the tension / pressure value measured by the tension / pressure sensor at the hinge between the i-th carriage and the i+1-th carriage.

[0062] Step 3: Determine the number of people in each subway car. Using the constant acceleration process after the train leaves the station in step 2, the total weight of each train car calculated by the single-chip data processing unit is combined with various parameters in the subway manual, including: the dead weight of each car m i 、Number of seats in each carriage i Etc., and then determine the number of people in each subway car:

[0063]

[0064] Where mi (i=1,2,3,4,5,6) represents the deadweight of each carriage, which is determined during the subway manufacturing process and is considered known; m h The average weight of a person is 60 kg; n i (i=1,2,3,4,5,6) indicates the number of people in each subway car.

[0065] Step 4: Subway car passenger capacity distribution display. Based on the number of people in each subway car obtained in step 3, the passenger capacity of each subway car is divided into five levels, namely, empty, empty, full, relatively crowded, moderately crowded, and heavily crowded, and the subway car passenger capacity distribution is intuitively displayed. The classification criteria are as follows:

[0066]

[0067] N i (i=1,2,3,4,5,6) represents the number of seats in the ith subway car, n i (i=1,2,3,4,5,6) represents the number of people in the i-th subway car.

[0068] The above-mentioned passenger capacity distribution detection method also uses a passenger capacity distribution detection device. The device is the same as the above-mentioned one and will not be described in detail here.

[0069] The present invention provides a method for detecting the passenger capacity distribution of subway cars based on the acceleration process. First, the train running state parameters are detected, including the current acceleration of the train, the power of the train driving motor, and the current speed of the train. The required acceleration, motor power, and speed can be obtained by reading the train monitoring recording device through the train monitoring information reading device; secondly, the tension / pressure value of each car hinge is obtained according to the tension / pressure sensor installed at the hinge of each car; finally, the passenger capacity of each subway car is detected according to the above parameters, and the grade is divided according to certain standards to complete the subway car passenger capacity distribution detection. Thereby providing a reliable basis for the subway passenger flow guidance system and improving the train transportation efficiency and service life.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for detecting the passenger capacity distribution of a subway car based on an acceleration process, characterized in that: The following steps are involved: Step 1, obtaining the current train running state parameters, including the instantaneous acceleration of the train during the constant acceleration process after leaving the station, the power of each drive motor, and the instantaneous running speed of the train, so as to calculate the equivalent traction force immediately contributed by each drive motor; the calculation method of the equivalent traction force immediately contributed by each drive motor is as follows: in, represents the sum of the power of each drive motor, is the instantaneous acceleration of the train, is the instantaneous running speed of the train, is the acceleration due to gravity, is the average resistance coefficient of train operation, Q Indicates the total number of carriages, X Indicates the number of trailer compartments; Step 2, obtain the tension / pressure value between each carriage during the constant acceleration process of the train after leaving the station, and calculate the total weight of each carriage by combining the equivalent traction force of each drive motor and the instantaneous acceleration of the train obtained in step 1; the total weight of each carriage The calculation method is as follows: in, Q Indicates the total number of carriages, Indicates Total weight of the carriages, including the first and Q The carriage is a trailer with a cab, and there is no articulation between the cab and the passenger area; , Respectively represent the first and second carriages Q Deadweight of the carriage driving area; Indicates Carriage and The tension / compression value measured by the tension / compression sensor at the articulation of the carriage; is the equivalent traction force of each driving motor; For trains is the instantaneous running speed of the train, is the acceleration due to gravity, is the average resistance coefficient of train operation; Step 3, calculating the number of people in each carriage according to the total weight of each carriage obtained in step 2; Step 4, obtaining the passenger capacity distribution of the subway cars according to the number of people in each car in step 3.

2. The method for detecting the passenger capacity distribution of a subway car based on the acceleration process according to claim 1, characterized in that: In step 3, the number of people in each carriage is calculated as follows: in, Indicates Gross weight of carriage, Indicates Weight of carriage, represents the average weight of a person, Indicates Number of people in the carriage, Q Indicates the total number of carriages.

3. The method for detecting the passenger capacity distribution of a subway car based on the acceleration process according to claim 1, characterized in that: In step 4, the passenger capacity distribution of subway cars is divided into five levels, namely, empty, empty, full, relatively crowded, moderately crowded, and severely crowded; the classification method is as follows: in, Indicates Number of people in the carriage, Indicates Number of seats in the carriage, Q Indicates the total number of carriages.

4. A detection device based on the subway car passenger capacity distribution detection method based on acceleration process as claimed in claim 1, characterized in that: The device comprises: a train monitoring information reading device, a tension and pressure sensor and a single-chip computer data processing unit; The train monitoring information reading device is installed in the cab and is used to read the train monitoring recording device to obtain train running status parameters, including train instant acceleration, train drive motor power, and train instant running speed; The tension / compression sensors are installed at the hinges of each carriage, and the detected tension / compression values ​​reflect the relationship between the total weight of the train in front and rear of the hinge; The single chip data processing unit is used to receive train running status parameters and tension / pressure values, and calculate the passenger capacity of each subway car based on them.

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