JP2009236140A - Method and device of detecting non-release of wheel tread brake of rail car - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely detect non-release of a wheel tread brake of a rail car on the ground side. <P>SOLUTION: Temperature of a rim part 11p near a contact surface with a rail 1 of a wheel 11 of the rail car is measured by a non-contact thermometer 2 set up on the ground to create a temperature pattern of the rim part of each train. The temperature pattern of the rim part is compared with a reference temperature pattern to determine the presence of the non-release of a brake. The temperature pattern of each train, which is a temperature pattern showing the temperature of the rim part of each wheel, is created while detecting a wheel 11 of a car by a wheel detector 3. The reference temperature pattern is the temperature pattern of the rim part at the normal time. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a method and an apparatus for detecting the incompatibility of a tread brake that decelerates and stops by pressing a restrictor against a tread of a railway vehicle wheel.

BACKGROUND ART A tread brake of a railway vehicle includes a brake member that generates a braking force against a tread surface of a wheel, and a pneumatic cylinder that drives the brake member. The incompatibility of the tread brake is a state where the brake is pressed against the tread of the wheel when the brake is released, even though the air pressure of the pneumatic cylinder becomes zero. This is a phenomenon that can occur when the brake is operated for a long time, such as when a train turns over. In addition, the incompatibility of the tread brake also occurs when the crew member travels with the hand brake applied. When this phenomenon occurs, it generates heat, causing problems such as tread peeling and wheel deformation.

In JP-A-8-290766 (Patent Document 1), a brake device for a railway vehicle is provided with a brake and a cylinder for each wheel, and high pressure air is supplied to the cylinder to press the brake against the tread of the wheel. A brake device that generates a braking force by the frictional force, provided with a relay valve between each cylinder and a high pressure air supply source, and stops the supply of high pressure air from the high pressure air supply source to each cylinder In addition, there is described a brake device that reduces or eliminates the generated braking force by exhausting supplied air from the relay valve and returning the braking pressure to an atmospheric pressure state.

In such a brake device, when the operation of the relay valve becomes dull or stuck, a predetermined time after the start of the brake release operation by the driver is detected in order to detect the brake incompatibility caused by the pressure remaining in the cylinder. The brake pressure of each cylinder is measured, and when the measured brake pressure is a certain value (usually 0.3 to 0.7 kgf / cm ² ) or more, it is determined that the brake is incomplete. However, in this case, even when the brake pressure is less than 0.3 kgf / cm ² , brake incompatibility may occur. However, in this case, there is a problem that it cannot be detected. Further, when the brake is released by the driver of the vehicle, the time required for exhausting the high-pressure air supplied to the cylinder is the air capacity after the relay valve, that is, between the relay valve and the relay valve and the cylinder. Since it differs depending on the air capacity of the air piping section and the cylinder, there is a problem that the set value for the predetermined time can only be determined after the vehicle is completed.

In JP 2005-283298 A (Patent Document 2), a radiation thermometer installed on the ground side where a predetermined traveling path of a vehicle is laid, and heat generating parts such as a motor and a brake installed under the floor of the vehicle are disclosed. An underfloor equipment temperature detection device for a vehicle that detects and evaluates the detected temperature to generate abnormality information is described. However, this vehicle underfloor equipment temperature detection device cannot detect whether the heat is generated by a motor or a resistor or a brake, and therefore cannot detect a brake incompatibility.
JP-A-8-290766 JP 2005-283298 A

The problem to be solved by the present invention is to make it possible to reliably detect the incompatibility of the tread brake of a railway vehicle on the ground side.

In order to solve the above problems, first, the temperature measurement point is a rim near the contact surface with the rail of the railway vehicle, second is a non-contact thermometer installed on the ground, and third is the wheel. The rim part temperature pattern for every train which shows the rim part temperature for every train was created. And the rim part temperature pattern for every said train was evaluated, and the presence or absence of the brake instability was determined.

According to the present invention, there has been provided a method and an apparatus that can reliably detect the incompatibility of a tread brake of a railway vehicle on the ground side. In addition, according to the present invention, even when most of the wheels are concealed by a bogie frame or the like, or when wheel locks are generated, it is possible to reliably detect the incompletion of the tread brake of the railway vehicle on the ground side. It was.

The best mode for carrying out the present invention is a non-contact thermometer installed on the ground in the vicinity of the rail to measure the temperature of the rim near the contact of the wheel of the rail vehicle traveling on the rail with the rail. The wheel detector installed on the ground in the vicinity of the rail to detect the wheel of the railway vehicle traveling on the rail, the temperature data of the non-contact thermometer, and the wheel timing signal of the wheel detector are input. And a processing device that processes the temperature data and the wheel timing signal to create a rim temperature pattern for each train, and evaluates the rim temperature pattern to determine whether there is brake incompatibility. It is the incompletion detecting device of the tread brake of a railway vehicle characterized by having the function to judge.

Non remission detector of railway vehicle tread brake according to an embodiment of the present invention, as shown in FIGS. 1 and 2, the temperature and measuring the temperature of the rim portion 11 _p of the wheel 11 of the railway vehicle 10 traveling on the rail 1 A radiation thermometer 2 that is a non-contact thermometer that outputs data T, a wheel detector 3 that detects a wheel 11 of the railway vehicle 10 and outputs a wheel timing signal S, and temperature data T and wheel detection of the radiation thermometer 2 And a processing device 4 to which the wheel timing signal S of the vessel 3 is input.

Here, a radiation thermometer is used for the non-contact thermometer 2, and an electromagnetic proximity switch is used for the wheel detector 3. The radiation thermometer 2 is adjusted to a direction and position so that the probe can measure the temperature of the rim portion 11p of the wheel 11 of the railway vehicle 10 traveling on the rail 1 near the rail 1, for example, on the ground about 1 meter away. It is installed. The wheel detector 3 is installed on the ground before the traveling direction of the train 10 with respect to the radiation thermometer 2, but may be at the same position.

As shown in FIG. 2, the processing device 4 includes a control unit 5, a storage unit 6, and a communication unit 7. The processing device 4 has a function of processing the temperature data T and the wheel timing signal S to create a rim portion temperature pattern for each train, and a function of evaluating the rim portion temperature pattern to determine whether there is brake incompatibility. It is to be prepared. Further, the processing device 4 is connected to a train management system, a train detection system, and a communication unit 7 (not shown).

Hereinafter, the operation of the tread brake incompatibility detecting device of one embodiment of the present invention will be described with reference to the flowchart of FIG. In FIG. 3, when a train arrives at a measurement point by a train detection system (not shown), the tread brake incompatibility detecting device starts processing of the brake incompatibility detecting operation. When the wheel detection unit 3 detects the wheel 11 of the vehicle 10 (101), the control unit 5 of the processing device 4 causes the non-contact thermometer 2 to measure the temperature of the rim portion 11p of the wheel 11 of the vehicle 10 (102). The temperature data T is stored in the storage unit 6 of the processing device 4. All vehicles are monitored for passage by a train detection system (not shown) (104). Therefore, the operation from step 101 to step 103 is continued until the determination result of step 104 becomes YES.

When the determination result in step 104 is YES, that is, when it is detected that all the vehicles have passed, the control unit 5 of the processing device 4 reads the storage data of the temperature data T from the storage unit 6 and trains the rim portion 11p of the wheel 11 A temperature pattern for each is generated (105). Subsequently, the control unit 5 evaluates whether or not the generated temperature pattern is a normal temperature pattern (106). That is, in step 106, the control unit 5 compares the reference temperature pattern stored in the storage unit 6 and determines whether or not they are the same. The reference pattern is a temperature pattern for each train that is normally generated.

If the determination result in step 106 is NO, the control unit 5 identifies which vehicle the brake incompatibility detection has occurred (107), and notifies the identified information to the train management system (not shown) via the communication unit 7 (108). ) Stop the brake incompatibility detection operation. If the determination result in step 106 is YES, the control unit 5 stops the brake incompatibility detection operation process.

Here, the temperature pattern of the rim portion will be described with reference to FIGS. As shown in FIG. 4, a certain vehicle 10 has two-to-four wheels 11 _A , 11 _B , 11 _C , and 11 _D , and the temperatures of the rim portions of these wheels are T _A , T _B , T _C. , and a _{T D.} Then, as shown in FIG. 5 (A), the normal rim temperature distribution is such that the rim temperature T _A , T _B , measured at the time when the wheels 11 _A , 11 _B , 11 _C , 11 _D are detected. There is no significant difference between T _C and T _D. On the other hand, as shown in FIG. 5B, the temperature distribution of the rim portion when the brake incompatibility occurs is such that the rim portion temperatures T _C and T measured at the time when the pair of wheels 11 _C and 11 _D are detected. _D is greatly different from the rim temperature T _A and T _B measured at the time when the next pair of wheels 11 _A and 11 _B is detected. 5A and 5B, the vertical axis represents temperature and the horizontal axis represents time. The reason why such a pattern is shown is that brake incompatibility usually occurs for each carriage.

As is apparent from FIGS. 5A and 5B, the rim temperature evaluation process performed by the control unit 5 of the processing device 4, that is, the determination in step 106 is performed by the rim portion measured by the non-contact thermometer 2. It is a process which determines whether the rim | limb part temperature pattern for every train produced | generated about this temperature is the normal temperature pattern of FIG. 5 (A).

It is a figure which shows the example of installation of the non-contact thermometer and the wheel detector which comprise the incompletion detection method apparatus of the tread brake of one Example of this invention. It is a block block diagram. It is a block block diagram of the incompletion detecting method apparatus of the tread brake of one Example of this invention. It is a flowchart which shows the flow of a process of the brake incompatibility detection apparatus of one Example of this invention. It is the figure which showed the correspondence of a wheel and rim | limb temperature about a certain vehicle. FIG. 5 is a diagram illustrating an example of a wheel rim portion temperature pattern (A) during normal braking and a wheel rim portion temperature pattern (B) generated when the brake of the vehicle of FIG. 4 is released.

Explanation of symbols

1 rail 2 noncontact thermometer 3 wheel detector 4 processor 5 control unit 6 memory 7 the communication unit 10 vehicles _{11,11 A, 11 B, 11 C} , 11 D wheel 11p rim portion 12 bogie frame S wheel timing signal T _{, T A, T B, T} C, T D temperature data

Claims (9)

The temperature of the rim part of the wheel near the contact surface with the rail of the railway vehicle is measured with a non-contact thermometer installed on the ground to create a rim part temperature pattern for each train, and the rim part temperature pattern is evaluated to brake A method for detecting the incompatibility of a tread brake of a railway vehicle that determines whether there is incompatibility 2. The railcar tread according to claim 1, wherein the temperature pattern for each train is a temperature pattern indicating a rim temperature for each wheel, and is created while detecting a wheel of the vehicle with a wheel detector. Brake incompatibility detection method. The method according to claim 1, wherein the evaluation is performed in comparison with a temperature pattern for each train during normal braking. The method of detecting incompatibility of a tread brake of a railway vehicle according to claim 1, wherein the non-contact thermometer is a radiation thermometer. The method for detecting the incompatibility of the tread brake of a railway vehicle according to claim 2, wherein the wheel detector includes a magnetic sensor. A non-contact thermometer installed on the ground in the vicinity of the rail to measure the temperature of the rim portion in the vicinity of the contact of the wheel of the rail vehicle traveling on the rail, and the wheel of the rail vehicle traveling on the rail. A wheel detector installed on the ground in the vicinity of the rail for detection; and a processing device to which temperature data of the non-contact thermometer and a wheel timing signal of the wheel detector are input. Has a function of processing the temperature data and the wheel timing signal to create a rim part temperature pattern for each train, and a function of evaluating the rim part temperature pattern to determine whether there is brake incompatibility An incompletion detecting device for a tread brake of a railway vehicle. The said evaluation is compared with the temperature pattern for every train at the time of a normal brake, The instability detection apparatus of the tread brake of a railway vehicle of Claim 6 characterized by the above-mentioned. 6. The incompletion detecting device for a tread brake of a railway vehicle according to claim 5, wherein the non-contact thermometer is a radiation thermometer. 6. The incompletion detecting device for a tread brake of a railway vehicle according to claim 5, wherein the wheel detector includes a magnetic sensor.

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