JP2015121251A - Abrasion loss arithmetic unit, vehicle, abrasion loss quantity arithmetic method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an abrasion loss arithmetic unit, a vehicle, an abrasion loss arithmetic method, and a program capable of detecting an abrasion loss of a pad while restricting the increase of the number of parts.SOLUTION: This invention provides an abrasion loss arithmetic unit for calculating an abrasion loss of a brake member for braking a body of revolution, the abrasion loss arithmetic unit comprising: a brake information acquisition part 32 for acquiring at least information of a brake pressure, a speed of a brake object, and a braking time; an abrasion loss computing part 33 for calculating an estimated abrasion of the brake member on the basis of the acquisition result of the brake information acquisition part 32; and an abrasion loss integration part 34 for integrating the estimated abrasion loss calculated by the abrasion loss computing part 33 to obtain an integrated abrasion loss.

Description

  The present invention relates to a wear amount calculation device, a vehicle, a wear amount calculation method, and a program.

  Some vehicles such as railway vehicles have a brake system that brakes a pad by pressing a pad against a rotating body such as a wheel or a disk. In a vehicle equipped with this type of brake system, the remaining amount of the pad is regularly checked, and the replacement is performed when it is determined that the predetermined remaining amount is set in advance. However, the pad is often contaminated with dirt, and it is difficult to visually check the remaining amount of the pad. Therefore, the burden on the worker has increased.

  In Patent Literature 1, when the pad reaches the wear limit, the wheel and the temperature detection unit are brought into contact with each other, and the function of the temperature detection unit is lost due to frictional heat, thereby detecting the wear limit of the pad. A detection device has been proposed.

  Patent Document 2 describes a technique for diagnosing a state by detecting wear of a sliding portion with a wear powder sensor, although it is not a technique related to a brake system.

JP 2010-196750 A JP 2002-188411 A

However, in the case of the wear state detection device described in Patent Document 1, a temperature detection unit must be newly provided. Similarly, in the case of the apparatus for diagnosing the wear state of Patent Document 2, a wear powder sensor must be newly provided. For this reason, the number of components increases as the sensor is provided, and the cost increases. In addition, maintenance of the temperature detection unit and the wear powder sensor is required separately, which may increase the burden on the operator.
The present invention has been made in view of the above circumstances, and provides a wear amount calculation device, a vehicle, a wear amount calculation method, and a program capable of obtaining the wear amount of a braking member while suppressing an increase in the number of parts. The purpose is to provide.

In order to solve the above problems, the following configuration is adopted.
A wear amount calculation device according to the present invention is a wear amount calculation device that calculates the wear amount of a braking member for braking a rotating body, and acquires at least information on brake pressure, speed to be braked, and braking time. The braking information acquisition unit that performs the calculation, the wear amount calculation unit that calculates the estimated wear amount of the braking member based on the acquisition result of the braking information acquisition unit, and the estimated wear amount that is calculated by the wear amount calculation unit are integrated. A wear amount integrating unit for obtaining an integrated wear amount.
With this configuration, for example, in the case of a vehicle air control device, the air pressure for driving the braking device as the brake pressure, the traveling speed of the vehicle as the speed to be braked, and the braking that performs the braking The amount of wear can be estimated using time. Furthermore, the estimated wear amount can be integrated. Therefore, it is possible to estimate the wear amount from the start of use of the braking member to the present by effectively utilizing existing sensors without newly providing a sensor for detecting the wear amount. As a result, it is possible to obtain the wear amount of the braking member while suppressing an increase in the number of parts.

Furthermore, in the wear amount calculation device according to the present invention, the wear amount calculation unit in the wear amount calculation device calculates the estimated wear amount based on a multiplication result obtained by multiplying the brake pressure and the speed of the brake target. May be.
The higher the brake pressure and the higher the speed of the braking target, the more the amount of wear of the braking member per unit time increases. Therefore, the amount of wear can be estimated more accurately by multiplying these speeds and the brake pressure. Further, the wear amount of the braking member can be estimated more accurately than when the wear amount is estimated using only one of the speed and the brake pressure.

Furthermore, the wear amount calculation device according to the present invention is such that, in the wear amount calculation device, the wear amount calculation unit multiplies the multiplication result by a coefficient that changes according to an accumulated braking time obtained by integrating the braking time. May be.
For example, when the remaining amount of the braking member is close to the limit, the wear rate increases even under the same conditions as the brake pressure, the speed to be braked, and the braking time. However, the coefficient of change according to the total braking time of the braking member is further multiplied by the multiplication result obtained by multiplying the brake pressure and the speed of the braking target, thereby calculating the change in wear rate over time. It can be included in the amount of wear.

The wear amount calculation device according to the present invention further includes a correction coefficient calculation unit that calculates a correction coefficient based on the actually measured wear amount in the wear amount calculation device, and the wear amount calculation unit includes the correction coefficient. May be multiplied by the multiplication result.
By doing in this way, since the wear amount calculated based on the actually measured wear amount can be corrected, the estimation accuracy of the wear amount can be improved.

Furthermore, the wear amount calculation device according to the present invention is the above wear amount calculation device, wherein the relationship between the accumulated wear amount obtained in advance by a predetermined operation pattern and the estimated braking time, and the accumulated wear amount is the use of the braking member. Based on a relationship between a storage unit that stores data of an estimated use limit time that is a limit, an integrated wear amount that is integrated by the wear amount integration unit, and an integrated wear amount that is stored in the storage unit and an estimated braking time An estimated braking time calculation unit for obtaining an estimated braking time, and a life calculating unit for obtaining a use limit time that becomes a use limit of the braking member based on the estimated braking time and the estimated use limit time obtained by the estimated braking time calculation unit And may be further provided.
With this configuration, the accumulated wear accumulated by the wear amount accumulating unit based on the relationship between the accumulated wear amount obtained in advance in a predetermined operation pattern and the estimated braking time, for example, a map, a table, a mathematical expression, or the like. The use limit time of the braking member corresponding to the amount can be obtained. Therefore, the time from the present time until the braking member reaches the use limit can be obtained. As a result, it is possible to improve the accuracy of the life estimation of the braking member based on the actual operation pattern.

A vehicle according to the present invention includes the wear amount calculation device.
By doing so, it is possible to estimate the cumulative amount of wear of the braking member of the vehicle and to omit periodic visual inspections and the like, so that it is possible to reduce the burden on the operator for vehicle maintenance. .

  A wear amount calculation method according to the present invention is a wear amount calculation method for calculating a wear amount of a braking member for braking a rotating body, and obtains at least information on a brake pressure, a speed to be braked, and a braking time. A brake information acquisition step, a wear amount calculation step of calculating an estimated wear amount of the brake member based on the information on the brake pressure, the speed to be braked, and a brake time, and the calculated estimated wear amount. And a wear amount integrating step of integrating and obtaining an integrated wear amount.

  In the wear amount calculation method according to the present invention, the estimated wear amount is calculated based on a multiplication result obtained by multiplying the brake pressure and the speed to be braked in the wear amount calculation step of the wear amount calculation method. Good.

  In the wear amount calculation method according to the present invention, in the wear amount calculation step of the wear amount calculation method, the multiplication result may be multiplied by a coefficient that changes according to an accumulated braking time obtained by integrating the braking time. .

  The wear amount calculating method according to the present invention further includes a correction coefficient calculating step of calculating a correction coefficient based on the actually measured wear amount in the wear amount calculating method, wherein the correction coefficient is calculated by the wear amount calculating step. The multiplication result may be multiplied.

  The wear amount calculation method according to the present invention is the above wear amount calculation method, wherein the relationship between the accumulated wear amount obtained in advance based on a predetermined operation pattern and the estimated braking time, and the wear amount integrating step are integrated. An estimated braking time calculating step for obtaining an estimated braking time based on the accumulated wear amount, and a usage limit that becomes a usage limit of the braking member based on the estimated braking time and the estimated usage limit time obtained by the estimated braking time calculating step. A life calculation step for obtaining time may be further included.

  A program according to the present invention is a program that causes a computer to function as a wear amount calculation device that calculates a wear amount of a braking member for braking a rotating body, the computer including a brake pressure, a speed to be braked, and A braking information acquisition unit that acquires at least braking time information, a wear amount calculation unit that calculates an estimated wear amount of the braking member based on an acquisition result of the braking information acquisition unit, and a wear amount calculation unit The estimated wear amount is integrated to function as a wear amount integration unit for obtaining an integrated wear amount.

  Furthermore, in the program according to the present invention, in the program, the wear amount calculation unit may calculate the estimated wear amount based on a multiplication result obtained by multiplying the brake pressure and the speed to be braked.

  Furthermore, in the program according to the present invention, the wear amount calculation unit may multiply the multiplication result by a coefficient that changes in accordance with an accumulated braking time obtained by integrating the braking time.

  Furthermore, the program according to the present invention further causes the computer to function as a correction coefficient calculation unit that calculates a correction coefficient based on the actually measured wear amount in the program, and the wear amount calculation unit sets the correction coefficient to the correction coefficient. The multiplication result may be multiplied.

  Further, the program according to the present invention is the above-described program, wherein the computer is caused to have a relationship between the accumulated wear amount obtained in advance by a predetermined operation pattern and the estimated braking time, and the accumulated wear amount is within a use limit of the brake member. A storage unit that stores data on the estimated usage limit time, an integrated wear amount integrated by the wear amount integration unit, and an estimated braking based on a relationship between the integrated wear amount stored in the storage unit and the estimated braking time. An estimated braking time calculation unit for obtaining a time, a life calculation unit for obtaining a use limit time serving as a use limit of the braking member based on the estimated brake time and the estimated use limit time obtained by the estimated brake time calculation unit, It may be further functioned.

  According to the wear amount calculation device, the vehicle, the wear amount calculation method, and the program according to the present invention, the wear amount of the pad can be obtained while suppressing an increase in the number of parts.

It is a figure showing the schematic structure of the brake device of vehicles in the embodiment of this invention. It is a block diagram which shows schematic structure of the abrasion amount calculating apparatus in this embodiment. It is a flowchart of the control processing by the wear amount calculating apparatus of this embodiment. It is a block diagram which shows schematic structure of the abrasion amount calculating apparatus in 2nd embodiment of this invention. It is a block diagram which shows schematic structure of the abrasion amount calculating apparatus in 3rd embodiment of this invention. It is a graph which shows the relationship between the estimated braking time by the predetermined | prescribed driving | operation pattern and integrated wear amount in 3rd embodiment of this invention. It is a map of the estimated braking time T 'corresponding to the estimated wear amount δ in the third embodiment of the present invention. It is a graph which shows the use limit time Td corresponding to the actual integrated braking time T in 3rd embodiment of this invention. It is a flowchart of the calculation process of the estimated lifetime by the wear amount calculating apparatus in 3rd embodiment of this invention.

Hereinafter, a wear amount calculation device, a vehicle, a wear amount calculation method, and a program according to a first embodiment of the present invention will be described.
FIG. 1 is a diagram showing a schematic configuration of a vehicle brake device according to an embodiment of the present invention.
As shown in FIG. 1, the brake device 1 of this embodiment is a so-called tread brake that presses the sliding member 18 against a tread of a wheel S of a vehicle 100 such as a railway vehicle to brake the vehicle. The brake device 1 includes a cylinder part 2, a link member 3, a casing 4, and a braking member 5.

  The cylinder part 2 includes a cylinder case 6 and a piston 7. In the cylinder portion 2, a cylinder chamber 8 is formed between the cylinder case 6 and the piston 7. The cylinder chamber 8 can be supplied with air, which is a working fluid, from an original air reservoir or the like via a brake valve (not shown). Moreover, the air supplied to the cylinder chamber 8 can be appropriately discharged. When the working fluid is supplied to the cylinder chamber 8, the cylinder portion 2 is displaced to the side where the piston 7 protrudes from the cylinder case 6. On the other hand, when the working fluid supplied to the cylinder chamber 8 is discharged, it is pressed by an elastic body (not shown) disposed on the link member 3 and the like, and the piston 7 is displaced to the side where the cylinder 7 is immersed. To do.

  The pressure in the cylinder chamber 8 (hereinafter simply referred to as brake pressure) can be monitored by a pressure sensor 9. Here, in FIG. 1, the case where the pressure sensor 9 measures the pressure in the cylinder chamber 8 is illustrated. However, the measurement position by the pressure sensor 9 is not limited to the above position. For example, the pressure inside the pipe between the cylinder part 2 and a brake valve (not shown) may be measured by the pressure sensor 9.

  The link member 3 is a member that links the cylinder portion 2 and the braking member 5. The first end 12 in the longitudinal direction of the link member 3 is rotatably attached to the end of the piston rod 11 of the cylinder 2. A second end portion 13 in the longitudinal direction of the link member 3 is fixed to the rod portion 14 of the braking member 5. The link member 3 is swingably supported by the casing 4 on the second end portion 13 side of the first end portion 12, the second end portion 13, and the central portion. The connection between the link member 3 and the piston rod 11 and the connection between the link member 3 and the casing 4 are both via rotation shafts 15 and 16 extending in the axle direction orthogonal to the direction in which the piston 7 protrudes and retracts. That is, when the piston rod 11 of the cylinder portion 2 is displaced in the protruding and retracting direction, the link member 3 rotates around the rotation shaft 16 and the second end portion 13 swings.

  The casing 4 accommodates the link member 3. The casing 4 is fixed to a bogie frame (not shown) or the like. The casing 4 is formed with a through hole 17 through which the rod portion 14 of the braking member 5 protrudes and retracts. Further, the casing 4 in this embodiment is formed integrally with the cylinder case 6.

The braking member 5 includes a sliding member 18, a support member 19, and a rod portion 14.
The sliding member 18 is made of a material such as cast iron or resin. The sliding member 18 is curved along the tread surface of the wheel S.

  The support member 19 is a member that supports the sliding member 18. The support member 19 is coupled to the sliding member 18 over substantially the entire circumferential direction on the surface of the sliding member 18 opposite to the sliding surface 18a. The support member 19 is pin-coupled to the side opposite to the sliding member 18 so that the tip of the rod portion 14 described above can rotate. A link member 20 for stabilizing the support member 19 is attached between the support member 19 and the casing 4. As a result, the brake member 5 causes the rod portion 14 to appear and disappear from the through hole 17 of the casing 4 as the link member 3 swings. The braking member 5 is displaced between the position where the sliding member 18 presses the tread surface of the wheel S and the position where the rod member 14 does not press by the protruding and retracting of the rod portion 14.

FIG. 2 is a block diagram showing a schematic configuration of the wear amount calculation device 22 in this embodiment.
The wear amount calculation device 22 in this embodiment is a device that calculates the wear amount of the sliding member 18 of the brake device 1 described above. Here, the amount of wear of the sliding member 18 is a thickness that is reduced by wear from braking from an unused state. A limit value (hereinafter simply referred to as “use limit”) at which the sliding member 18 can be used is set for the sliding member 18 in advance.

The wear amount calculation device 22 in this embodiment is composed of a computer such as a vehicle control device mounted on the vehicle 100, for example. At least one wear amount computing device 22 is installed for one train of vehicles.
As shown in FIG. 2, the wear amount calculation device 22 is connected to the pressure sensor 9 described above, a vehicle speed sensor 23 such as a speed generator for detecting the traveling speed of the vehicle, and a display device 24 such as a display. The input / output interface 25 is provided. Further, the wear amount calculation device 22 further includes a memory 26 used as a work area or the like. The wear amount calculation device 22 further includes an auxiliary storage device 27 such as a hard disk drive device, and a control device 28 that performs various control processes.

The auxiliary storage device 27 includes an arithmetic program storage unit 29 and a data storage unit 30.
The calculation program storage unit 29 is a storage area for storing a calculation program executed by the control device 28. For example, the arithmetic program is stored in the auxiliary storage device 27 via the storage / reproduction device 31 from the disk type storage medium Ds. Here, the method of storing the arithmetic program in the auxiliary storage device 27 is not limited to the above method. The arithmetic program may be stored in the auxiliary storage device 27 from an external device via a communication interface (not shown), for example.

  The data storage unit 30 stores the detection result of the pressure sensor 9, the detection result of the vehicle speed sensor 23, and the information of the braking time in association with each other when the brake device 1 is performing a braking operation. Here, the braking time is a time during which a single braking operation by the brake device 1 is performed. In other words, it is the time during which the braking member 5 is continuously pressed against the wheel S.

  Furthermore, the data storage unit 30 stores in advance a coefficient that changes in accordance with the accumulated braking time obtained by integrating the braking time.

  The data storage unit 30 further stores various data obtained by the calculation of the control device 28. Here, among various data obtained by the control device 28, data that needs to be temporarily stored by the arithmetic program may be stored in the memory 26.

  The control device 28 includes a CPU (Central Processing Unit; not shown) that performs various calculations. The control device 28 includes a braking information acquisition unit 32, a wear amount calculation unit 33, a wear amount integration unit 34, a wear amount determination unit 36, and a timer as a plurality of functional units realized by executing the calculation program. 37.

  The braking information acquisition unit 32 acquires the brake pressure, vehicle speed, and braking time data from the data storage unit 30. The braking information acquisition unit 32 further acquires data of a coefficient obtained in advance from the relationship among the brake pressure, the vehicle speed, and the wear amount, the wear amount corresponding to the use limit of the sliding member 18, and the estimated use limit time. . The data acquired by the braking information acquisition unit 32 is input to the wear amount calculation unit 33. Here, the coefficient obtained in advance is different depending on characteristics such as the material of the braking member 5. Furthermore, the coefficient in this embodiment changes according to the integrated braking time obtained by integrating the braking time. This change in coefficient corresponds to a change in the amount of wear that changes according to the braking time.

  The wear amount calculation unit 33 calculates the estimated wear amount of the sliding member 18 of the braking member 5 based on each data acquired by the braking information acquisition unit 32. Here, the wear amount calculation unit 33 calculates an estimated wear amount worn by the one braking operation described above. Here, the estimated amount of wear described above can be obtained by integrating the braking pressure, the vehicle speed, and a coefficient α (t) described later, integrated with the braking time.

  The wear amount integrating unit 34 integrates the estimated wear amount calculated by the wear amount calculating unit 33 to obtain the integrated wear amount. The accumulated wear amount data is overwritten and stored in the data storage unit 30 of the auxiliary storage device 27 described above each time the estimated wear amount is calculated. Here, an example in which the data of the integrated wear amount is overwritten in the data storage unit 30 has been described. However, the data is not limited to the overwriting storage, and may be stored in association with, for example, time data.

  The wear amount determination unit 36 compares the accumulated wear amount accumulated by the wear amount accumulation unit 34 with a preset threshold value for the accumulated wear amount. The wear amount determination unit 36 changes the replacement flag of the braking member 5 from “0” to “1”, for example, when the accumulated wear amount is larger than the threshold value. Here, when the replacement flag becomes “1”, the control device 28 outputs a control command for notifying that the braking member 5 is at the replacement time, for example, to the display device 24 or the like. The notification method to the effect of the replacement time is not limited to the display device 24. For example, notification may be made by turning on a warning lamp, outputting sound, or the like.

  The timer 37 outputs time information for counting the braking time and the like to the braking information acquisition unit 32.

The wear amount calculation device 22 in this embodiment has the above-described configurations. Next, a wear amount calculation method in the above-described wear amount calculation device 22 will be described with reference to the drawings.
FIG. 3 is a flowchart of control processing by the wear amount calculation device 22 of this embodiment.
As shown in FIG. 3, the braking information acquisition unit 32 of the control device 28 acquires vehicle speed, braking pressure, braking time data, and coefficients from the data storage unit 30 of the auxiliary storage device 27 (step). S01 to S04). Here, the data acquisition order is not limited to the order described above.

  Next, the wear amount calculation unit 33 of the control device 28 calculates an estimated wear amount based on the brake pressure, the vehicle speed, the braking time, and the coefficient (step S05). Further, the wear amount accumulation unit 34 of the control device 28 accumulates the estimated wear amount to obtain the accumulated wear amount (step S06). Here, when the coefficient is “α (t)”, the brake pressure is “p”, and the vehicle speed is “v”, the estimated amount of wear can be estimated by assuming that the cumulative braking time obtained by integrating the braking time up to now is “T”. The accumulated wear amount δ that is an accumulated value of the above satisfies the following expression (1).

  That is, the estimated wear amount δ can be calculated by integrating the product of the brake pressure p, the vehicle speed v, and the coefficient α (t) with the braking time. Here, the value obtained by multiplying and integrating the brake pressure p and the vehicle speed v increases as the number of braking increases. Therefore, the wear amount can be estimated by arranging the relationship between the value obtained by multiplying and integrating the brake pressure p and the vehicle speed v and the estimated wear amount δ in advance by α.

  By the way, in actual railway vehicles, digital data is often used. In this case, assuming that the number of times of braking is “i” and the cumulative wear amount up to the (i−1) th time is “δi−1”, the estimated wear amount δi up to the i-th time can be obtained by equation (2).

Next, the wear amount determination unit 36 of the control device 28 determines whether or not the accumulated wear amount is larger than a threshold value. If the result of this determination is “Yes” (cumulative wear amount> threshold), the control device 28 outputs a control command notifying that the replacement time has come to the display device 24 or the like.
On the other hand, when the result of determination by the wear amount determination unit 36 is “No” (integrated wear amount ≦ threshold), the above-described series of control processing is repeated without performing the notification.

  Therefore, according to the first embodiment described above, the wear amount can be estimated using the brake pressure, the vehicle speed, and the braking time. Further, the estimated wear amount can be integrated to obtain the integrated wear amount. Therefore, the amount of wear from the start of use of the sliding member 18 to the present is estimated by effectively using sensors already installed in the vehicle 100 without newly providing a sensor for detecting the amount of wear of the sliding member 18. can do.

  In addition, the higher the brake pressure and the higher the vehicle speed to be braked, the greater the wear amount of the braking member 5 per unit time. Therefore, the wear amount can be more accurately determined by multiplying the vehicle speed and the brake pressure. Can be estimated. Furthermore, the wear amount of the braking member 5 can be estimated more accurately than when the wear amount is estimated using only one of the vehicle speed and the brake pressure.

  Further, when the remaining amount of the braking member 5 is close to the limit, the wear rate increases even under the same conditions as the brake pressure, the vehicle speed, and the braking time, but the coefficient α that changes according to the total braking time of the braking member is By further multiplying the multiplication result obtained by multiplying the pressure and the vehicle speed, the change in the wear rate over time can be included in the calculated estimated wear amount.

  Next, a wear amount calculation device, a vehicle, a wear amount calculation method, and a program according to a second embodiment of the present invention will be described. Here, the second embodiment is different only in that the estimated wear amount calculated in the first embodiment described above is corrected based on the actually measured wear amount. For this reason, the same parts as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

FIG. 4 is a block diagram showing a schematic configuration of the wear amount computing device 122 in the second embodiment of the present invention.
As shown in FIG. 4, the wear amount calculation device 122 includes an input / output interface 25, a memory 26, a control device 28, an auxiliary storage device 27, and a storage / reproduction device 31.

  A pressure sensor 9, a vehicle speed sensor 23, and a display device 24 are connected to the input / output interface 25. In addition, the input / output interface 25 is connected to a manual input device 40 that includes a mouse, a keyboard, and the like and allows a user to input data and the like by manual input. Data input by the manual input device 40 is stored in the data storage unit 30.

  In the wear amount calculation device 122 of the second embodiment, data of the wear amount of the sliding member 18 (hereinafter simply referred to as an actually measured wear amount) periodically measured by the user is input. In the data storage unit 30, the measured wear amount of the sliding member 18 measured periodically is stored in association with the measured time information. Here, it is not necessary to actually measure the amount of wear of all the sliding members 18 of the plurality of braking members 5 mounted on the vehicle 100 of one organization, and only the amount of wear of the sliding member 18 is determined by at least one representative braking member 5. What is necessary is just to actually measure.

  The control device 28 includes a braking information acquisition unit 32, a wear amount calculation unit 33, a wear amount integration unit 34, a wear amount determination unit 36, and a timer as a plurality of functional units realized by executing the calculation program. 37 and a correction coefficient calculation unit 41.

  The correction coefficient calculation unit 41 compares the accumulated wear amount based on the estimated wear amount calculated by the wear amount accumulation unit 34 with the actual wear amount stored in the data storage unit 30. When the difference between the accumulated wear amount and the measured wear amount is greater than a preset threshold value, the correction coefficient calculation unit 41 calculates a correction coefficient according to the difference (correction coefficient calculation step). The correction coefficient calculation unit 41 outputs the calculated correction coefficient β to the wear amount calculation unit 33. Here, the preset threshold value may be changed by the user.

  The correction coefficient calculation unit 41 uses the correction coefficient β calculated by the correction coefficient calculation unit 41 to calculate an estimated wear amount according to the following equation (3).

  Here, in the braking member 5 before the start of use, the correction coefficient β is set to “1”. That is, the estimated wear amount δ is not substantially corrected by the correction coefficient β for the braking member 5 before the start of use.

  Therefore, according to the second embodiment described above, since the estimated wear amount can be corrected based on the actually measured wear amount, the estimation accuracy of the wear amount can be improved. As a result, it is possible to prevent the actual wear amount of the sliding member 18 from greatly exceeding the usage limit, and it is possible to prevent unnecessary replacement of the sliding member 18 when the remaining amount of the sliding member 18 is sufficiently larger than the usage limit. .

  Next, a wear amount calculation device, a vehicle, a wear amount calculation method, and a program according to a third embodiment of the present invention will be described. Here, the second embodiment differs from the first embodiment described above only in that the time until the use limit of the braking member 5 is obtained. For this reason, the same parts as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

FIG. 5 is a block diagram showing a schematic configuration of the wear amount computing device 222 according to the third embodiment of the present invention.
As shown in FIG. 5, the wear amount calculation device 222 in this embodiment includes an input / output interface 25, a memory 26, a control device 28, an auxiliary storage device 27, and a storage / reproduction device 31.

  In addition to the detection result of the pressure sensor 9, the detection result of the vehicle speed sensor 23, and the information of the braking time, the data storage unit 30 of the auxiliary storage device 27 estimates the accumulated wear amount obtained in advance by a predetermined driving pattern. The relationship with the braking time is further stored. Here, the relationship between the accumulated wear amount and the estimated braking time is, for example, a map, a table, an equation, or the like of the accumulated wear amount and the estimated braking time. Furthermore, the predetermined driving pattern is a driving pattern for actually driving the vehicle. There is a discrepancy between this driving pattern and actual driving. The relationship between the accumulated wear amount and the estimated braking time is obtained in advance by a simulation, a test, or the like with a predetermined operation pattern. FIG. 6 is a map of the estimated braking time and the accumulated wear amount according to a predetermined operation pattern.

  The data storage unit 30 stores in advance data of an accumulated wear amount (“threshold” in FIG. 6) corresponding to the use limit of the sliding member 18 and an estimated use limit time (in other words, life). The estimated use limit time can be obtained in advance from the relationship between the accumulated wear amount and the estimated braking time obtained in advance by a predetermined operation pattern, and the accumulated wear amount corresponding to the use limit described above.

  The control device 28 includes a braking information acquisition unit 32, a wear amount calculation unit 33, a wear amount integration unit 34, a wear amount determination unit 36, and a timer as a plurality of functional units realized by executing the calculation program. 37, an estimated braking time calculation unit 42, and a life calculation unit 43.

  The estimated braking time calculation unit 42 calculates the estimated braking time based on the accumulated wear amount accumulated by the wear amount accumulating unit 34 and the relationship between the accumulated wear amount stored in the data storage unit 30 and the estimated braking time. Ask. For example, as shown in FIG. 7, an estimated braking time T ′ corresponding to the estimated wear amount δ is obtained.

  Based on the estimated braking time T ′ obtained by the estimated braking time calculating unit 42 and the estimated use limit time Td ′ stored in the data storage unit 30, the life calculation unit 43 determines that the sliding member 18 has the use limit. The use limit time Td is obtained. Further, the life calculation unit 43 calculates the remaining usable time (hereinafter referred to as an estimated life) from the difference Td−T between the current integrated braking time T and the use limit time Td. The use limit time Td is obtained by correcting the estimated use limit time Td 'based on the ratio between the estimated braking time T' and the estimated use limit time Td 'and the actual integrated braking time T.

The ratio T ′ / Td ′ between the estimated use limit time Td ′ and the estimated braking time T ′ indicates how much of the sliding member 18 is currently used. That is, by dividing the actual integrated braking time T by the ratio T ′ / Td ′, the use limit time Td by actual driving can be obtained. FIG. 8 is a graph showing the use limit time Td corresponding to the actual integrated braking time T.
The use limit time Td can be calculated by the following equation (4).

  Here, the case where the estimated use limit time Td 'is corrected based on the estimated braking time T' and the actual integrated braking time T has been described, but it may be corrected based on the deviation.

The wear amount calculation device 222 in this embodiment has the above-described configurations. Next, a wear amount calculation method in the above-described wear amount calculation device 222 will be described with reference to the drawings. In the description of the wear amount calculation method, an estimated life calculation process will be particularly described.
FIG. 9 is a flowchart of the estimated life calculation processing by the wear amount calculation device 222 of this embodiment.

The estimated braking time calculating unit 42 of the control device 28 includes the accumulated wear amount accumulated by the wear amount accumulating unit 34, the accumulated wear amount determined in advance by a predetermined operation pattern stored in the data storage unit 30, and the estimated braking time. Are acquired respectively (steps S11 to S12).
The estimated braking time calculation unit 42 further calculates an estimated braking time T ′ based on each acquired data (step S13).

  The life calculation unit 43 of the control device 28 is based on the estimated braking time T ′ obtained by the estimated braking time calculation unit 42 and the estimated use limit time Td ′ stored in the data storage unit 30. The use limit time Td at which becomes the use limit is obtained (step S14). Further, the life calculation unit 43 calculates the estimated life by subtracting the total braking time from the actual use limit time Td (step S15). This estimated life is output to the display device 24 by the control device 28, for example. Thereby, the information on the estimated life is notified to the user (step S16).

  Therefore, according to the third embodiment described above, based on the relationship between the accumulated wear amount obtained in advance with a predetermined operation pattern and the estimated braking time, it corresponds to the accumulated wear amount accumulated by the wear amount integrating unit 34. The use limit time Td of the braking member 5 can be obtained. Therefore, the time from the present time until the braking member 5 reaches the use limit can be obtained. As a result, it is possible to improve the accuracy of the life estimation of the braking member 5 based on the actual operation pattern.

  Note that the present invention is not limited to the above-described embodiments, and includes various modifications made to the above-described embodiments without departing from the spirit of the present invention. That is, the specific shapes, configurations, and the like given in the embodiment are merely examples, and can be changed as appropriate.

  For example, in each embodiment mentioned above, the case where the brake device 1 was a tread brake was described as an example. However, the brake device 1 is not limited to the tread brake. For example, a disc brake or a drum brake may be used. The brake device 1 is not limited to the one using air as the working fluid, and may be a hydraulic brake device using hydraulic oil or the like. Furthermore, in each embodiment mentioned above, although the brake device 1 provided in a railway vehicle was demonstrated about an example, it is not restricted to a railway vehicle. Further, one wear amount calculation device 22, 122, 222 may be installed in each vehicle 100 of one organization. Moreover, it is not restricted to the brake device of a vehicle, For example, brake devices, such as a machine tool, may be sufficient. In this case, the rotational speed of the rotating body may be acquired instead of the vehicle speed.

  Further, in each of the above-described embodiments, the case where the estimated wear amount δ is obtained by the expression (1) has been described. However, it is not limited to a mathematical expression, and may be obtained using, for example, a map or a table. Further, in addition to the coefficient α (t), the temperature function γ (t) of the sliding member 18 is multiplied, and the estimated wear amount δ is obtained by taking into account the change in the wear amount according to the temperature. Good.

  Furthermore, in the second embodiment described above, the case where the estimated wear amount δ is corrected by the correction coefficient β has been described as an example. However, the configuration is not limited to this. For example, the correction coefficient β may be calculated by the user based on the actually measured amount of wear by inspection, and the correction coefficient β may be input from the manual input device 40. For example, when the frequency of actually measuring the wear amount is high, the coefficient α (t) itself may be corrected from the relationship between the accumulated wear amount and the actually measured wear amount.

  Moreover, you may use combining the structure demonstrated by 2nd embodiment mentioned above, and the structure demonstrated by 3rd embodiment.

  Further, in each of the above-described embodiments, the computer-readable disk type storage medium Ds has been described. However, the storage medium is not limited to a disk type such as a magnetic disk, a magneto-optical disk, a CD-ROM, or a DVD-ROM, and a storage medium such as a semiconductor memory may be used. The computer program may be distributed to the computer via a communication line, and the computer that has received the distribution may execute the program.

  Furthermore, the program may be for realizing a part of the functions described above. Moreover, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, and what is called a difference file (difference program) may be sufficient.

DESCRIPTION OF SYMBOLS 1 Brake device 2 Cylinder part 3 Link member 4 Casing 5 Braking member 6 Cylinder case 7 Piston 8 Cylinder chamber 9 Pressure sensor 11 Piston rod 12 First end part 13 Second end part 14 Rod part 15 Rotating shaft 16 Rotating shaft 17 Through-hole 18 Sliding member 19 Support member 20 Link member 22 Wear amount calculation device 23 Vehicle speed sensor 24 Display device 25 Input / output interface 26 Memory 27 Auxiliary storage device 28 Control device 29 Calculation program storage unit 30 Data storage unit 31 Storage / reproduction Device 32 Braking information acquisition unit 33 Wear amount calculation unit 34 Wear amount integration unit 36 Wear amount determination unit 37 Timer 40 Manual input device 41 Correction coefficient calculation unit 42 Estimated braking time calculation unit 43 Life calculation unit 100 Vehicle 122 Wear amount calculation unit 222 Wear amount calculation device S Wheel

Claims (16)

A wear amount calculation device for calculating a wear amount of a braking member for braking a rotating body,
A braking information acquisition unit for acquiring at least information on a brake pressure, a speed to be braked, and a braking time;
A wear amount calculation unit that calculates an estimated wear amount of the braking member based on an acquisition result of the braking information acquisition unit;
A wear amount calculation device comprising: a wear amount integration unit that obtains an integrated wear amount by integrating the estimated wear amount calculated by the wear amount calculation unit. The wear amount calculator is
The wear amount calculation device according to claim 1, wherein the estimated wear amount is calculated based on a multiplication result obtained by multiplying the brake pressure and the speed to be braked. The wear amount calculator is
The wear amount calculation device according to claim 2, wherein the multiplication result is multiplied by a coefficient that changes in accordance with an accumulated braking time obtained by integrating the braking time. Based on the measured amount of wear, a correction coefficient calculation unit for calculating a correction coefficient,
The wear amount calculation device according to claim 2, wherein the wear amount calculation unit multiplies the multiplication coefficient by the correction coefficient. A storage unit that stores data of an estimated wear limit time at which the accumulated wear amount is a use limit of the braking member, and a relationship between the accumulated wear amount and the estimated braking time that are obtained in advance by a predetermined operation pattern;
An estimated braking time calculation unit for obtaining an estimated braking time based on a relationship between the accumulated wear amount accumulated by the wear amount accumulation unit and the accumulated wear amount stored in the storage unit and the estimated braking time;
The life calculation part which calculates | requires the use limit time used as the use limit of the said braking member further based on the estimated brake time and the estimated use limit time calculated | required by the said estimated brake time calculation part is provided. The wear amount calculation apparatus according to claim 1.   A vehicle comprising the wear amount calculation device according to any one of claims 1 to 5. A wear amount calculation method for calculating a wear amount of a braking member for braking a rotating body,
A braking information acquisition step of acquiring at least information of a brake pressure, a speed to be braked, and a braking time;
A wear amount calculation step of calculating an estimated wear amount of the braking member based on the brake pressure, the speed to be braked, and information on the braking time;
A wear amount integrating step of integrating the calculated estimated wear amount to obtain an integrated wear amount; The wear amount calculating step includes:
The wear amount calculation method according to claim 7, wherein an estimated wear amount is calculated based on a multiplication result obtained by multiplying the brake pressure by the speed to be braked. The wear amount calculating step includes:
The wear amount calculation method according to claim 8, wherein the multiplication result is multiplied by a coefficient that changes in accordance with an accumulated braking time obtained by integrating the braking time. A correction coefficient calculating step of calculating a correction coefficient based on the actually measured wear amount;
The wear amount calculation method according to claim 8 or 9, wherein the wear amount calculation step multiplies the multiplication coefficient by the correction coefficient.   An estimated braking time calculating step for obtaining an estimated braking time based on a relationship between an accumulated wear amount and an estimated braking time obtained in advance based on a predetermined operation pattern, and an accumulated wear amount accumulated in the wear amount integrating step; 11. A life calculation step for obtaining a use limit time that becomes a use limit of the braking member based on the estimated brake time and the estimated use limit time obtained by the estimated brake time calculation step. The wear amount calculation method according to any one of the above. A program for causing a computer to function as a wear amount calculation device for calculating a wear amount of a braking member for braking a rotating body,
The computer,
A braking information acquisition unit for acquiring at least information on a brake pressure, a speed to be braked, and a braking time;
A wear amount calculation unit that calculates an estimated wear amount of the braking member based on an acquisition result of the braking information acquisition unit;
A program that functions as a wear amount integration unit that integrates the estimated wear amount calculated by the wear amount calculation unit to obtain an integrated wear amount. The wear amount calculator is
The program according to claim 12, wherein the estimated wear amount is calculated based on a multiplication result obtained by multiplying the brake pressure and the speed to be braked. The wear amount calculator is
The program according to claim 13, wherein the multiplication result is multiplied by a coefficient that changes in accordance with an accumulated braking time obtained by integrating the braking time. Further causing the computer to function as a correction coefficient calculation unit for calculating a correction coefficient based on the actually measured wear amount,
The program according to claim 13 or 14, wherein the wear amount calculation unit multiplies the multiplication result by the correction coefficient. The computer,
A storage unit that stores data of an estimated wear limit time at which the accumulated wear amount is a use limit of the braking member, and a relationship between the accumulated wear amount and the estimated braking time that are obtained in advance by a predetermined operation pattern;
An estimated braking time calculation unit for obtaining an estimated braking time based on a relationship between the accumulated wear amount accumulated by the wear amount accumulation unit and the accumulated wear amount stored in the storage unit and the estimated braking time;
16. A life calculation unit that obtains a use limit time that becomes a use limit of the braking member based on the estimated brake time and the estimated use limit time obtained by the estimated brake time calculation unit, and further functions as a life calculation unit. The program as described in any one of.

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