JP2015089150A - Mileage arithmetic unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To calculate mileage correctly.SOLUTION: An automatic oscillation measuring instrument 11 is mounted on a railway vehicle which receives a signal from outside every time the vehicle travels by reference mileage. The automatic oscillation measuring instrument 11 comprises: a memory 14 for storing pulse number for one rotation of a tachometer generator, diameter of wheel, and the reference mileage; a counter 15 for counting the pulse number of the tachometer generator; mileage arithmetic means 16 for calculating mileage that the railway vehicle has traveled based on the respective values of the pulse number counted by the counter 15; wheel diameter calculation means 17 for calculating wheel diameter based on the pulse number for one rotation of the tachometer generator stored in the memory 14, reference mileage and the respective values of the pulse number counted by the counter 15, when it receives the signal; and control means 18 for overwriting and storing the value of the wheel diameter calculated by the wheel diameter calculation means 17 to the value of the wheel diameter stored in the memory 14.

Description

  The present invention relates to a kilometer calculation device mounted on a railway vehicle.

  When there is an abnormality such as a track error, a railway vehicle such as the Shinkansen (registered trademark) is greatly shaken to deteriorate the ride comfort. If the degree of abnormality is large, it may lead to a derailment accident. For this reason, the motion is detected by a motion sensor mounted on a railway vehicle, and an abnormality such as a track error is detected at a small level (see, for example, Patent Document 1).

  The point where the swaying occurred can be grasped by calculating a kilometer (travel distance) with an arithmetic device mounted on the railway vehicle (see, for example, Patent Document 2). The arithmetic device sequentially calculates the kilometer based on the wheel diameter stored in advance in the memory and the number of pulses of the speed generator. However, an error may occur between the calculated kilometer and the actual kilometer due to wheel slipping, a difference between a preset wheel diameter and an actual wheel diameter, and the like. Therefore, every time the vehicle travels 10 kilometers, a signal is received from the outside and the actual kilometers are corrected.

Japanese Patent No. 3624390 JP 2001-287647 A

  When using a wheel having a diameter smaller than that of a standard wheel as a result of polishing, unless the correct wheel diameter is input in advance, the kilometer calculated by the arithmetic unit will be out of order. In addition, if the wheel diameter decreases or becomes larger due to thermal expansion due to wear during traveling, even if the correct wheel diameter is entered, the kilometer calculated by the arithmetic unit will be out of order. . In such a case, even if the kilometer can be corrected every 10 kilometres, the kilometer starts to go out of order immediately and errors are accumulated.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a kilometer calculation device that can accurately calculate the kilometer traveled by a railway vehicle.

  (1) The present invention is a kilometer calculation device mounted on a railway vehicle that receives a signal from an external transmitter by a receiver every time it travels a standard kilometer, and is a pulse per revolution of a speed generator. A memory for storing values such as number, wheel diameter, and reference kilometer, a counter for counting the number of pulses of the speed generator, and a pulse per rotation of the speed generator stored in the memory. A kilometer calculation means for sequentially calculating the kilometer traveled by the railway vehicle based on each value of the number and the wheel diameter, and the number of pulses counted by the counter, and the receiver As a trigger, the number of pulses per revolution of the speed generator stored in the memory, the reference kilometer, and the value of the number of pulses counted by the counter And a wheel diameter calculating means for calculating the wheel diameter, and a control for overwriting and storing the wheel diameter value calculated by the wheel diameter calculating means on the wheel diameter value stored in the memory. Means for calculating the kilometer.

  According to the present invention, the value of the wheel diameter can be automatically corrected every time the vehicle travels about a reference kilometer (for example, 10 km). As a result, even when using a wheel whose diameter is smaller than the standard wheel due to polishing work, or when the wheel diameter decreases or becomes larger due to thermal expansion due to wear during traveling, Based on the correct wheel diameter, the kilometer traveled by the railway vehicle can be accurately calculated.

  (2) The present invention also provides a degree-of-movement determination means for determining whether a value indicating the degree of movement of the railway vehicle acquired by the movement sensor mounted on the railway vehicle exceeds a predetermined threshold value. The control means includes the kilometer at a timing at which a value indicating the degree of motion of the railway vehicle acquired by the motion sensor is determined by the motion level determination means to exceed the predetermined threshold. The kilometer calculation device according to (1) above, wherein the kilometer calculated by the distance calculation means is stored in the memory.

  According to the above invention, it is possible to accurately calculate the point (about kilometer) at which the rolling motion of the railway vehicle is detected.

  According to the kilometer calculation device described in (1) and (2) of the present invention, the kilometer traveled by the railway vehicle can be accurately calculated.

1 is a configuration diagram of a Shinkansen (registered trademark) automatic oscillation measurement system employing a kilometer calculation device according to an embodiment of the present invention. It is a block diagram which shows the structure of the vehicle upper side apparatus in a Shinkansen (trademark) automatic oscillation measurement system. It is a block diagram which shows a part of structure of an automatic shake measuring device. It is a flowchart which shows the flow of correction | amendment of a wheel diameter.

  Hereinafter, with reference to the drawings, the configuration of the automatic oscillation measuring instrument 11 that functions as a kilometer calculation device according to an embodiment of the present invention will be described. FIG. 1 is a configuration diagram of a Shinkansen (registered trademark) automatic oscillation measurement system 1. FIG. 2 is a block diagram showing the configuration of the vehicle upper side device 2. FIG. 3 is a block diagram showing a part of the configuration of the automatic shake measuring instrument 11. Note that in each drawing, a part of the configuration is omitted as appropriate to simplify the drawing.

  A Shinkansen (registered trademark) automatic vibration measurement system (hereinafter referred to as a measurement system) 1 shown in FIG. 1 is used by a railway operator in order to detect an abnormality such as a track error at an early stage. This measurement system 1 realizes that the fluctuation of a Shinkansen (registered trademark) vehicle is sequentially measured and analyzed, displayed, and printed by the client terminal 7. Specifically, the measurement system 1 includes a plurality of on-vehicle devices 2, a mobile phone line 3, a dedicated line 4, a line router 5, a communication terminal 6a, a server 6b, a client terminal 7, and the like. ing.

  The vehicle upper side device 2 sequentially detects the fluctuation of the Shinkansen (registered trademark) vehicle and the oncoming vehicle. Then, the vehicle upper side device 2 sequentially transmits the detected data to the server 6b via the mobile phone line 3, the dedicated line 4, the line router 5, and the communication terminal 6a.

  The mobile phone line 3 is an external fixed communication line, which is provided by a telecommunications carrier.

  The dedicated line 4 is a dedicated line for railway operators and is connected to a fixed communication line.

  The line router 5 connects the communication terminal 6 a and the server 6 b to the dedicated line 4.

  The communication terminal 6a receives the data transmitted from the vehicle upper side device 2, and transfers it to the server 6b.

  The server 6b stores the data transferred from the communication terminal 6a.

  The client terminal 7 is cable-connected to the server 6b so as to be one-way from the server 6b. The client terminal 7 reads out data stored in the server 6b and performs analysis / display / printing. A relay server or terminal may be appropriately arranged between the line router 5 and the client terminal 7.

  As shown in FIG. 2, a Shinkansen (registered trademark) device 10 and the like are connected to the vehicle upper side device 2. The vehicle upper side device 2 includes an antenna 8, an automatic vibration measuring instrument 11, an acceleration sensor unit 12, an oncoming vehicle detection device 13, and the like.

  The antenna 8 functions as a mobile communication means and is connected to the mobile phone line 3 wirelessly.

  The Shinkansen (registered trademark) apparatus 10 automatically generates signals used for so-called “kilo-distance correction” (a signal from a speed generator (not shown), a signal from a receiver (not shown) that receives an external signal), and the like. It transmits to the fluctuation measuring instrument 11. Details of the kilometer correction will be described later.

  The automatic vibration measuring instrument 11 processes data acquired by the acceleration sensor unit 12 and the oncoming vehicle detection device 13 and transmits the data toward the mobile phone line 3.

  The acceleration sensor unit 12 sequentially acquires a value indicating the degree of shaking of the Shinkansen (registered trademark) vehicle in each of three directions (front and rear, left and right, and upper and lower three-dimensional directions). Output to. That is, the acceleration sensor unit 12 functions as a motion sensor.

  The oncoming vehicle detection device 13 outputs a detection signal for determining the presence or absence of an oncoming vehicle to the automatic shake measuring instrument 11. This is because the fluctuation of the Shinkansen (registered trademark) vehicle is caused not only by an abnormality such as a trajectory error, but also by a wind pressure generated when passing the oncoming vehicle, for the purpose of grasping it. For details of oncoming vehicle detection, refer to, for example, Japanese Patent No. 4492983.

  The automatic oscillation measuring instrument 11 shown in FIG. 3 functions as a kilometer calculation device. This automatic shake measuring instrument 11 has, as its internal structure, a memory 14, a counter 15, a kilometer calculation means 16a, a vehicle speed calculation means 16b, a wheel diameter calculation means 17, a control means 18, and a fluctuation degree determination means 19. And so on.

  The memory 14 stores values input by input means (not shown) such as key switches and values processed by the control means 18. Specifically, the memory 14 stores values such as the number of pulses per revolution of the speed generator (so-called pulse rate), the wheel diameter, and a reference kilometer (in this embodiment, 10 km). The number of pulses per rotation of the speed generator may be set in advance or may be input from the input means. The wheel diameter may be set in advance or may be input from the input means. The reference kilometer may be set in advance or may be input from the input unit. The memory 14 may be provided with a plurality of types (RAM, ROM, etc.) as appropriate depending on the application, and used appropriately.

  The counter 15 counts the number of pulses of the speed generator based on the signal from the speed generator. The number of pulses counted by the counter 15 is stored in the memory 14 when the receiver receives an external signal. That is, the number of pulses counted by the counter 15 is stored in the memory 14 every reference kilometer (in this embodiment, 10 km).

  The kilometer calculation means 16a is a calculation means for sequentially calculating the kilometer distance traveled by the Shinkansen (registered trademark) vehicle while traveling. The kilometer calculation means 16a is based on the values of the number of pulses per rotation and the wheel diameter of the speed generator stored in the memory 14 and the number of pulses counted by the counter 15 (cumulative value). The process is calculated sequentially. Specifically, the kilometer calculation means 16a calculates the kilometer per pulse from each value of the number of pulses per rotation of the speed generator and the wheel diameter, and adds the value (counted to that value). By multiplying by the number of pulses, the kilometer traveled by the Shinkansen (registered trademark) vehicle is sequentially calculated. Note that “sequential” here may be each time the counter 15 counts the number of pulses (every time) or may be at regular intervals.

  For example, when the number of pulses per revolution of the speed generator is 90 [ppr] and the wheel diameter is 760 [mm], the kilometer calculating means 16a sets the kilometer per pulse to about 26.5 [mm]. (≈π × 760 [mm] / 90 [ppr]). Then, the kilometer calculation means 16a sequentially calculates the kilometer distance traveled by the Shinkansen (registered trademark) vehicle by multiplying the value by the counted number of pulses. The kilometer calculation means 16a may be realized in any manner as long as it can sequentially calculate the kilometer traveled by the Shinkansen (registered trademark) vehicle, and may be realized by hardware or software. Also good.

  The vehicle speed calculation unit 16b is a calculation unit that sequentially calculates the speed of a Shinkansen (registered trademark) vehicle. The vehicle speed calculation means 16b includes the number of pulses of the speed generator stored in the memory 14, the total time counted by a timer (not shown), and the kilometer per pulse calculated by the kilometer calculation means 16a. Based on the value, the speed of the Shinkansen (registered trademark) vehicle is sequentially calculated. Specifically, the vehicle speed calculation means 16b obtains the kilometer traveled by the Shinkansen (registered trademark) vehicle at the total time from the total time, the number of pulses per second, and the kilometer per pulse. To calculate the speed of the Shinkansen (registered trademark) vehicle.

  For example, when the total time is 0.1 [second], the number of pulses per second is 1256 [Hz], and the kilometer per pulse is 26.5 [mm], the vehicle speed calculation means 16b The distance that the vehicle travels in 0.1 seconds is determined as about 3328.4 [mm] (≈0.1 [seconds] × 1256 [Hz] × 26.5 [mm]). Then, the vehicle speed calculation means 16b obtains the speed of the Shinkansen (registered trademark) vehicle as about 120 [km / h] (≈33284 [mm / sec] = 3328.4 [mm] /0.1 [sec]). The vehicle speed calculation means 16b may be realized in any way as long as it can sequentially calculate the speed of a Shinkansen (registered trademark) vehicle, and may be realized by hardware or software.

  The wheel diameter calculating means 17 is a calculating means for calculating the wheel diameter. This wheel diameter calculation means 17 is triggered by the fact that the receiver receives an external signal every reference kilometer (in this embodiment, 10 km). The number of pulses and the reference kilometer (in this embodiment, 10 km), and the time from when the receiver receives an external signal until the next external signal is received (while the Shinkansen (registered trademark) vehicle travels 10 km) Based on each value of the number of pulses counted by the counter 15, the wheel diameter is calculated (back calculation).

  For example, when the number of pulses per revolution of the speed generator is 90 [ppr] and the counted number of pulses is 381972 [pulses], the wheel diameter calculation means 17 sets the wheel diameter to about 750 [mm] (≈10 [Km] × 90 [ppr] / 381972 [pulse] / π). The wheel diameter calculating means 17 may be realized in any way as long as the wheel diameter can be calculated (reverse calculation), and may be realized by hardware or software.

  The control means 18 is a CPU or the like, and executes various controls by executing various programs. When the wheel diameter calculating means 17 calculates the wheel diameter, the control means 18 calculates the wheel diameter value (for example, 760 [mm]) stored in the memory 14 by the wheel diameter calculating means 17. The wheel diameter value (for example, 750 [mm]) is overwritten and stored. Thereby, the value of the wheel diameter is automatically corrected. Then, the control means 18 receives a detection signal from the degree-of-sway determining means 19 described later, and stores the kilometer calculated by the kilometer calculation means 16a in the memory 14. However, in preparation for the case where the wheel diameter value calculated by the wheel diameter calculating means 17 becomes an unreasonable value for some reason, it is within ± 10% of the wheel diameter or the previously calculated wheel diameter value. If there is, it is adopted and the value is overwritten and stored. That is, if it exceeds ± 10%, it is not adopted, and the value is discarded without being overwritten.

  Based on the signal (value) from the acceleration sensor unit 12, the degree-of-sway determination means 19 determines the degree of sway of the Shinkansen (registered trademark) vehicle. Specifically, the sway degree determination means 19 determines whether or not the value of the signal from the acceleration sensor unit 12 exceeds a predetermined threshold value. In the present embodiment, the shaking degree determining means 19 separately determines the shaking degree for each of the three-dimensional directions of front and rear, left and right, and top and bottom. Then, the shaking degree determination means 19 outputs a detection signal that means that abnormal shaking has been detected when it is determined that the value of the signal from the acceleration sensor unit 12 exceeds a predetermined threshold value. This detection signal is input to the control means 18.

  The predetermined threshold may be a fixed method or a speed variation method. In the case of the fixed method, a preset limit reference value is used as a threshold value. The limit reference value may be selected in advance from a plurality of limit reference values such as the first, second, and third limit reference values. The lower limit value of the limit reference value is preferably set to 0.025G (gravity). This limit reference value can be changed even during measurement. In this case, the update is performed in anticipation of when the process is in a standby state. In the case of the speed variation method, the threshold value is determined by a predetermined conversion formula using the speed of the Shinkansen (registered trademark) vehicle calculated by the vehicle speed calculation means 16b.

  Note that the degree-of-sway determination means 19 may be realized in any way as long as it can detect abnormal shaking of the Shinkansen (registered trademark) vehicle based on the signal from the acceleration sensor unit 12, and may be realized by hardware. Alternatively, it may be realized by software.

  Next, the flow of “wheel diameter correction” will be described with reference to FIG. FIG. 4 is a flowchart showing a flow of correcting the wheel diameter.

  As shown in FIG. 4, the Shinkansen (registered trademark) vehicle travels about a standard kilometer (in this embodiment, 10 km), and the receiver receives an external signal, so that the signal from the receiver is an automatic oscillation measuring instrument. 11 (step (hereinafter abbreviated as S) 100). When the signal from the receiver is input to the automatic sway measuring instrument 11, the wheel diameter calculating means 17 causes the number of pulses per rotation of the speed generator stored in the memory 14 and the reference kilometer (in this embodiment). 10 km), and the wheel diameter is calculated (reverse calculation) based on each value of the number of pulses counted by the counter 15 from when the receiver receives the external signal until the next external signal is received ( S200). When the wheel diameter is calculated, the control means 18 overwrites and saves the value in the memory 14 (S300).

  Thus, according to the automatic oscillation measuring instrument 11 that functions as a kilometer calculation device, the value of the wheel diameter can be automatically corrected every time the vehicle travels 10 kilometers. This ensures that even if you use a wheel whose diameter is smaller than that of a standard wheel due to grinding work, or wears during driving and the wheel diameter decreases or expands due to thermal expansion, it is correct. Based on the value of the wheel diameter, the kilometer traveled by the Shinkansen (registered trademark) vehicle can be accurately calculated.

  Then, when the degree of sway determination 19 determines that the predetermined threshold has been exceeded, the kilometer traveled by the Shinkansen (registered trademark) vehicle calculated by the kilometer calculation means 16 is stored in the memory 14. (Registered Trademark) A point (about kilometer) where a vehicle shake is detected can be accurately calculated.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit and technical idea thereof.

  That is, in the said embodiment, although the case where the shake of a Shinkansen (trademark) vehicle was detected was demonstrated to the example, this invention is not limited to this, The case where the shake of a conventional line vehicle or other railway vehicles is detected Can be adopted.

11 Automatic shaking measurement device (kilometer calculation device)
12 Acceleration sensor unit (sway sensor)
14 Memory 15 Counter 16 Kilometer Calculation Unit 17 Wheel Diameter Calculation Unit 18 Control Unit 19 Oscillation Degree Determination Unit

Claims (2)

A kilometer calculation device mounted on a railway vehicle that receives a signal from an external transmitter with a receiver each time it travels about a reference kilometer,
A memory for storing values of the number of pulses per rotation of the speed generator, wheel diameter, and the reference kilometer,
A counter for counting the number of pulses of the speed generator;
Based on the values of the number of pulses per rotation of the speed generator stored in the memory, the wheel diameter, and the number of pulses counted by the counter, the vehicle travels about the kilometer traveled by the railway vehicle. Means for calculating the kilometer sequentially,
When the receiver receives the signal, each of the number of pulses per rotation of the speed generator and the reference kilometer stored in the memory, and the number of pulses counted by the counter Wheel diameter calculating means for calculating the wheel diameter based on a value;
Control means for overwriting and storing the wheel diameter value calculated by the wheel diameter calculating means on the wheel diameter value stored in the memory,
Kilo arithmetic unit. A value indicating the degree of shaking of the railway vehicle acquired by the shaking sensor mounted on the railway vehicle includes a degree of shaking determination means for determining whether or not a predetermined threshold value is exceeded.
The control means has the kilometer calculation means at a timing when the value indicating the degree of shaking of the railway vehicle acquired by the shaking sensor is determined by the shaking degree determining means to exceed the predetermined threshold. Storing the kilometer calculated in the above-mentioned memory.
The kilometer calculation device according to claim 1.

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