JP2014040171A - Brake application detection device and brake application detection method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a brake application detection device that can accurately detect application of brakes without depending upon attention of a person, and further to provide a brake application detection method.SOLUTION: A brake application detection device has a first temperature sensor, a second temperature sensor, a calculation section and a determination section. The first temperature sensor measures temperatures of wheels of a vehicle traveling on rails at a first measurement position. The second temperature sensor measures the temperatures of the wheels of the vehicle traveling on the rails at a second measurement position located downstream the first measurement position. The calculation section calculates temperature differences among the temperatures of the wheels measured by the second temperature sensor and the temperatures of the wheels measured by the first temperature sensor. The determination section detects whether or not application of brakes is present on the basis of whether or not the temperature differences calculated by the calculation section are not less than a reference value for detecting the application of the brakes with respect to the wheels.

Description

  Embodiments described herein relate generally to a brake incompatibility detecting device and a brake incompatibility detecting method for detecting incompatibility of a vehicle brake.

  For example, in a railway vehicle, a freight car often repeats connection and release, and rolling is prevented by a manual brake when detained. If the freight car is pulled while the manual brake is applied, the wheel of the freight car becomes hot due to frictional heat, which may cause deformation of the wheel. Conventionally, the incompatibility of the brake has been taken to prevent human error by a technique such as putting a display tag indicating that the brake is operating. However, it is difficult to reliably prevent the manual brake from being loosened by a coping method that depends on the attention of a human (operator).

JP 2009-236140 A

  The present invention has been made in view of the above problems, and an object thereof is to provide a brake incompatibility detecting device and a brake incompatibility detecting method capable of detecting incompatibility of a brake without depending on human attention. To do.

  According to the embodiment, the brake incompatibility detection device includes a first temperature sensor, a second temperature sensor, a calculation unit, and a determination unit. The first temperature sensor measures the temperature of the vehicle wheel passing on the rail at the first measurement position. The second temperature sensor and the temperature of the wheel passing on the rail are measured at the second measurement position subsequent to the first measurement position. The calculation unit calculates a temperature difference between the wheel temperature measured by the second temperature sensor and the wheel temperature measured by the first temperature sensor. The determination unit detects the presence or absence of a brake incompatibility depending on whether or not the temperature difference calculated by the calculation unit is equal to or greater than a reference value for detecting the incompatibility of the brake.

FIG. 1 is a diagram illustrating a configuration example of a brake incompatibility detecting device according to an embodiment. Drawing 2 is a figure for explaining the example of setting of the measurement position which detects the temperature of the wheel concerning an embodiment. Fig.3 (a) is an example of the output signal of the object detection sensor provided in the 1st point which concerns on embodiment. FIG. 3B is an example of an output signal of temperature information measured by the temperature sensor provided at the first point. FIG. 3C is an example of an output signal of the object detection sensor provided at the second point. FIG. 3D is an example of an output signal of temperature information measured by the temperature sensor provided at the second point. FIG. 4 is a flowchart for explaining the flow of processing in the arithmetic device.

Hereinafter, embodiments will be described with reference to the drawings.
FIG. 1 is a diagram illustrating a configuration example of a brake incompatibility detection system (brake incompatibility detection device) according to the present embodiment.
The brake incompatibility detecting device according to the present embodiment is a system that detects the incompatibility of the brake of a railway vehicle on the ground side. In the configuration example shown in FIG. 1, the brake incompatibility detection system includes a plurality of temperature sensors 11 (11A, 11B), a plurality of object detection sensors 12 (12A, 12B), a calculation device 13, a command device 14, and a traffic light 15. Etc.

  The temperature sensor 11 is a sensor for detecting the temperature of a wheel in a vehicle traveling on the rail of the track. The temperature sensor 11 is constituted by, for example, a sensor that measures the temperature of an object without contact. For example, the temperature sensor 11 measures the temperature of the wheel at a predetermined measurement position. The object detection sensor 12 is a sensor for detecting wheels (objects) in a vehicle traveling on a rail. The object detection sensor 12 detects the presence or absence of an object without contact, for example. The object detection sensor 12 detects a wheel (object) passing through a predetermined measurement position.

  The temperature sensor 11 (11A, 11B) and the object detection sensor 12 (12A, 12B) are installed in pairs at a plurality of points (for example, points A, B) in the vicinity of the track through which the vehicle passes. Each object detection sensor 12A (12B) is installed so as to detect a vehicle wheel passing on the rail at a predetermined measurement position. The temperature sensor 11A (11B) outputs a signal indicating the temperature of the wheel at the timing when the pair of object detection sensors 12A (12B) detect the wheel at each measurement position.

  The computing device 13 determines the incompatibility of the brake for each wheel based on the wheel temperature measured by the plurality of temperature sensors 11 at the timing when the plurality of object detection sensors 12 detect the wheel. In the configuration example shown in FIG. 1, the arithmetic unit 13 determines whether or not there is brake incompatibility for each wheel depending on whether the temperature difference between the temperature measured at the point B and the temperature measured at the point A is equal to or greater than a predetermined reference value. (Whether the brake seems to be in an incomplete state or not) is determined.

  When the temperature difference between the wheels at a plurality of points is greater than or equal to the reference value (that is, when the brake incompatibility is detected with respect to the wheels), the arithmetic unit 13 does not release the brake (the wheel temperature predicted to be the incompatibility of the brake). A signal indicating that an increase in () is detected) is output. For example, when the temperature difference of the wheels between a plurality of points is greater than or equal to a reference value, the arithmetic device 13 outputs a signal notifying (warning) that the incompatibility of the brake has been detected to the command device 14. When receiving a signal indicating that the brake incompatibility has been detected from the arithmetic device 13, the command device 14 performs control to stop the vehicle or warns the driver of the vehicle of the brake incompatibility. Or

For example, when the command device 14 receives a signal indicating that the incompatibility of the brake has been detected from the arithmetic device 13, the command device 14 causes the traffic light 15 to turn on a signal for stopping the vehicle (for example, the traffic light 15 is turned red). ) To stop the vehicle. In addition, the command device 14 may issue a warning to the staff that a brake incompatibility has been detected by a display device or a speaker. The command device 14 may notify the driver of the vehicle that the incompatibility of the brake has been detected by wireless communication or the like. For example, the driver of the vehicle may be alerted by displaying on the vehicle driving device that the incompatibility of the brake has been detected. Next, the configuration of the arithmetic device 13 will be described.
In the configuration example illustrated in FIG. 1, the arithmetic device 13 includes a control unit 21, a memory 22, a communication unit 23, and an interface 24. The arithmetic unit 13 only needs to have a function of processing signals received from the temperature sensors 11 (11A, 11B) and the object detection sensors 12 (12A, 12B) via the interface 24. For example, a general computer such as a personal computer may be used. It can be realized with a simple computer.

  The control unit 21 controls the entire arithmetic device 13. The control unit 21 includes a processor such as a CPU, a working memory such as a RAM, and a program memory such as a ROM, and various data processing functions are realized by the processor executing the program. For example, the control part 21 implement | achieves the function which determines the incompletion of a brake, when a processor runs the program for determining the incompatibility of a brake.

  The memory 22 is a storage device for storing data. For example, the memory 22 stores a reference value for determining brake incompatibility. The reference value for determining the incompatibility of the brake stored in the memory 22 is not limited to one, and a plurality of values may be set according to various conditions (for example, weather conditions, vehicle speed, etc.). The reference value may be stored. The memory 22 may also store information such as the temperature of each wheel measured by each temperature sensor 11 (11A, 11B).

The communication unit 23 is an interface for performing communication with an external device such as the command device 14. For example, when the temperature rise value of the wheel is equal to or higher than a predetermined reference value, the communication unit 23 notifies the command device 14 of information for warning the insufficiency of the brake.
The interface 24 receives output signals from the temperature sensors 11 and the object detection sensor 12. The interface 24 acquires information indicating the temperature from each temperature sensor 11 and acquires information indicating the detection result of the wheel from each object detection sensor 12.

Next, the configuration of the command device 14 will be described.
In the configuration example illustrated in FIG. 1, the command device 14 includes a control unit 31, a communication unit 32, a traffic light control unit 33, and a display unit 34. The command device 14 is a device for controlling a vehicle traveling on the track. For example, the command device 14 is provided in a command room for monitoring the operation of the vehicle. The command device 14 only needs to have a communication function with the arithmetic device 13 and functions such as control of the traffic light 15, and can be realized by a general computer.

The control unit 31 controls the entire command device 14. The control unit 31 includes a processor such as a CPU, a working memory such as a RAM, and a program memory such as a ROM, and various data processing functions are realized by the processor executing programs. For example, the control part 31 implement | achieves the function which determines the incompletion of a brake, when a processor executes the program for determining the incompatibility of a brake.
The communication unit 32 is an interface for performing communication with an external device such as the arithmetic device 13. For example, the communication unit 32 receives information notifying (warning) that the incompatibility of the brake has been detected from the arithmetic device 13.

  The traffic light control unit 33 has a function of controlling traffic of the vehicle by controlling the traffic light 15 provided beside the track. For example, when an alarm indicating that the incompatibility of the brake has been detected is received from the arithmetic unit 13, the control unit 31 displays a signal for stopping the vehicle on the traffic signal 15 by the traffic signal control unit 33 (for example, a red signal) Lit). In the configuration example shown in FIG. 1, the traffic signal 15 controlled by the traffic signal control unit 33 is provided at a position before the vehicle enters the main line.

  The display unit 34 displays an alarm or guidance. For example, when an alarm indicating that the incompatibility of the brake has been detected is received from the arithmetic device 13, the control unit 31 displays a display on the display unit 34 that warns the attendant that the incompatibility of the brake has been detected. You may do it. In addition, the command device 14 may be provided with a speaker for sounding an alarm that warns the attendant that the incompatibility of the brake has been detected. Further, the command device 14 may be provided with a wireless communication unit for wirelessly notifying the driver of the vehicle or the portable terminal possessed by the driver of the vehicle that the incompatibility of the brake has been detected. .

Next, a configuration for detecting the wheel temperature will be described.
In the brake incompatibility detection system, since the temperature of the wheel of the vehicle passing on the rail is measured at a plurality of measurement positions, a plurality of pairs of the temperature sensor 11 (11A, 11B) and the object detection sensor 12 (12A, 12B) are provided. It is installed at the point. Wheel temperature measurement positions are provided at two or more locations at intervals at which it is possible to determine the temperature rise of the wheel due to incompatibility of the brake. The longer the interval between each measurement position, the more accurately the tendency of the wheel temperature to rise can be identified.However, in order to detect the incompletion of the brake at an early stage, the temperature rise of the wheel within the desired range after the freight car departs. Set to detect. For example, in order to detect an increase in the temperature of the wheel due to incompatibility of the brake, it is assumed that the interval between the measurement positions is about 50 m to 100 m or more.

  In addition, in order to prevent traveling on the main line in the state where the brakes are not released, each detained railway vehicle (freight car) can be detected on the track in the yard until it reaches the main line. A temperature sensor 11 and an object detection sensor 12 are installed. In this case, the measurement positions of the plurality of wheel temperatures are set according to the state such as the track length from the indwelling position of the vehicle to the main line. That is, the railway vehicle after departure from the detained position can be surely stopped before reaching the main line by the signal of the traffic light 15 provided in front of the main line (that is, the brake is applied before the vehicle reaches the front of the traffic signal 15). Each temperature sensor 11 and the object detection sensor 12 may be installed so that incompatibility can be detected.

  In the configuration example shown in FIG. 1, pairs of temperature sensors 11 (11A, 11B) and object detection sensors 12 (12A, 12B) are installed at two points (points A, B), respectively. In the configuration example shown in FIG. 1, the temperature sensor 11A and the object detection sensor 12A installed at the point A are installed so as to measure the temperature of the wheel passing on the rail at the measurement position Sa. In the configuration example shown in FIG. 1, the temperature sensor 11B and the object detection sensor 12B installed at the point B are installed so as to measure the temperature of the wheel passing on the rail at the measurement position Sb.

  The temperature sensor 11A installed at the point A measures the spot temperature at the measurement position Sa without contact. When the object detection sensor 12A installed at the point A detects a wheel (object) passing through the measurement position Sa, the signal level of the output signal becomes equal to or higher than a predetermined threshold. The temperature sensor 11A outputs a signal indicating the temperature measured at the timing when the object detection sensor 12A detects the wheel (while the signal level of the output signal is equal to or higher than the threshold). Thereby, the temperature sensor 11A outputs a signal indicating the temperature of the wheel passing through the measurement position Sa. The arithmetic device 13 outputs the temperature sensor 11A as the temperature of each wheel at the measurement position Sa in synchronization with the object detection sensor 12A detecting the wheel (the signal of the object detection sensor 12A becomes Active). Information indicating the wheel temperature is acquired, and information indicating the acquired wheel temperature is recorded in the memory 22.

  Further, the temperature sensor 11B installed at the point B measures the spot temperature at the measurement position Sb in a non-contact manner. When the object detection sensor 12B installed at the point B detects a wheel (object) passing through the measurement position Sb, the signal level of the output signal becomes equal to or higher than a predetermined threshold. The temperature sensor 11B outputs a signal indicating the temperature measured at the timing when the object detection sensor 12B detects the wheel (while the signal level of the output signal is equal to or higher than the threshold). Thereby, temperature sensor 11B outputs the signal which shows the temperature of the wheel which passes measurement position Sb. The calculation device 13 outputs the temperature sensor 11B as the temperature of each wheel at the measurement position Sb in synchronization with the object detection sensor 12B detecting the wheel (the signal of the object detection sensor 12B becomes Active). Information indicating the wheel temperature is acquired, and information indicating the acquired wheel temperature is recorded in the memory 22.

Next, the measurement position for measuring the wheel temperature will be described.
FIG. 2 is a diagram for explaining a setting example of each measurement position for detecting the temperature of the wheel.
Each temperature sensor 11A, 12A detects the temperature of the wheel on a rail without contact. For this reason, the measurement position is set so that the wheel can be reliably measured between the vehicle structure other than the vehicle and the rail surface. That is, the measurement position of the wheel temperature is set with the height from the rail surface taking the vehicle structure into consideration. In the example shown in FIG. 2, the minimum distance from the rail surface of the vehicle structure other than the wheels (the distance between the vehicle structure other than the vehicle and the rail surface) is L1, the upper margin is Lmh, and the lower margin is Lml. To do. In this case, the temperature sensor 11 and the object detection sensor 12 are installed at each point so that the measurement position has a measurement target range of L1-Lmh or less from the rail surface and Lml or more from the rail surface.

Next, examples of output signals from each temperature sensor 11 and each object detection sensor 12 will be described.
3A is an example of an output signal of the object detection sensor 12A provided at the point A, and FIG. 3B is an example of an output signal of temperature information measured by the temperature sensor 11A provided at the point A. is there. 3C is an example of an output signal of the object detection sensor 12B provided at the point B, and FIG. 3D is an example of an output signal of temperature information measured by the temperature sensor 11A provided at the point B. is there.

  When the object detection sensor 12A detects an object (wheel), the signal level of the output signal is increased. For the output signal of the object detection sensor 12A, a signal for detecting a wheel is detected. Set the threshold. In FIG. 3A, in order to determine that the vehicle having n wheels has passed through the first measurement position, the output signal of the object detection sensor 12A, and that the wheel has been detected at the first measurement position. An example of the threshold value is shown. In the example shown in FIG. 3A, there are n times when the output signal of the object detection sensor 12A is equal to or greater than the threshold value, and these indicate the timing when n wheels are detected.

  On the other hand, the temperature sensor 11A is in a state where the output signal of the object detection sensor 12A installed in a pair is detecting a wheel (that is, the output signal exceeds a threshold for detecting the wheel). The output signal is controlled to be active. Therefore, the temperature sensor 11A intermittently outputs information indicating the temperature value of each wheel passing through the first measurement position detected by the object detection sensor 12A. FIG. 3B shows an example of the output signal of the temperature sensor 11A corresponding to the output signal of the object detection sensor shown in FIG. In FIG. 3 (a), since n wheels are detected at the first measurement position, FIG. 3 (b) shows a pulse shape indicating the temperature of each of the n wheels when passing through the first measurement position. Are sequentially output.

  In addition, a threshold for detecting a signal in a state where a wheel is detected is set for the output signal of the object detection sensor 12B. FIG. 3C shows an output signal of the object detection sensor 12A when a vehicle having n wheels after passing through the first measurement position passes through the second measurement position. In the example shown in FIG. 3 (c), there are n periods in which the output signal of the object detection sensor 12B is equal to or greater than the threshold, and the n wheels after passing through the first measurement position are at the second measurement position. The detected timing is shown.

  On the other hand, the temperature sensor 11B is in a state where the output signal of the object detection sensor 12B installed in a pair is detecting the wheel (that is, the output signal exceeds the threshold for detecting the wheel). The output signal is controlled to be active. Accordingly, the temperature sensor 11B intermittently outputs information indicating the temperature value of each wheel passing through the second measurement position detected by the object detection sensor 12B. FIG. 3D shows an example of the output signal of the temperature sensor 11A corresponding to the output signal of the object detection sensor 12B shown in FIG. In FIG. 3 (c), in order to detect n wheels passing through the second measurement position after passing through the first measurement position, FIG. 3 (d) shows the n when passing through the second measurement position. A pulse-like signal indicating the temperature of each wheel is sequentially output.

Next, the brake incompatibility determination process will be described.
The arithmetic device 13 sequentially obtains information indicating the temperature of each wheel measured by the temperature sensor 11 </ b> A at the first measurement position with respect to the vehicle traveling on the rail through the interface 24. In addition, after the first measurement position is passed, the calculation device 13 also sequentially uses the interface 24 to indicate information indicating the temperature of each wheel measured by the temperature sensor 11B at the second measurement position with respect to the vehicle traveling on the rail. get. The computing device 13 stores in the memory 22 information indicating the temperature of each wheel acquired from the temperature sensor 11A and information indicating the temperature of each wheel acquired from the temperature sensor 11B.

  For example, it is assumed that a vehicle that is a target for detecting incompatibility of a brake has n wheels. The n wheels in the vehicle pass through the second measurement position in order after passing through the first measurement position in order. Therefore, the temperature Tb (Tb1, Tb2, Tb3,..., Tbn) of each wheel measured by the temperature sensor 11B at the second measurement position is the temperature Ta (Tbn) of each wheel measured by the temperature sensor 11A at the first measurement position. (Ta1, Ta2, Ta3,..., Tan). If the temperature Ta measured at the first measurement position is subtracted from the temperature Tb measured at the second measurement position according to the association for each wheel, the temperature rise value of each wheel between the first measurement position and the second measurement position ( (Temperature difference) ΔT (Tb1−Ta1 = ΔT1, Tb2−Ta2 = ΔT2, Tb3−Ta3 = ΔT3,..., Tbn−Tan = ΔTn) is calculated.

  That is, the controller 21 measures the temperature (Ta1, Ta2, Ta3,..., Tan) measured at the first measurement position stored in the memory 22 and the temperature (Tb1, Tb2, Tb3,..., Tbn) measured at the second measurement position. ) For each wheel, and temperature differences (ΔT1, ΔT2, ΔT3,..., ΔTn) are calculated. The temperature differences (ΔT1, ΔT2, ΔT3,..., ΔTn) indicate the amount of change in temperature of each wheel (temperature rise value) until each wheel moves from the first measurement position to the second measurement position.

  Since it is considered that a sudden increase in temperature occurs as the vehicle travels, the presence or absence of incompatibility of the brake is detected by the temperature difference (temperature increase value). It is assumed that a reference value for determining whether or not the temperature difference is a value indicating incomplete braking is stored in the memory 22. The reference value for detecting the incompatibility of the brake from the temperature difference between the two points should be determined according to the interval between the first measurement position and the second measurement position. For example, the reference value is set based on a field test or the like. The reference value is a reference for a temperature difference between temperatures measured at a plurality of measurement positions. The temperature difference between the predetermined measurement positions (temperature rise value) can cancel the change in the ambient temperature due to the season, etc., so that it is possible to detect the incompatibility of the brake even in an environment where the ambient temperature changes. The reference value does not need to vary greatly depending on the ambient temperature. In other words, the present brake incompatibility detection system is less affected by changes in the ambient temperature due to the season and the like, and can detect the incompatibility of the brake with high accuracy.

  However, depending on weather conditions such as rain and snow, the degree to which the heat generated in the wheels is dissipated due to incompatibility of the brake may vary greatly. For this reason, the memory 22 may store a plurality of reference values corresponding to weather conditions such as rain and snow. In this case, a weather sensor for detecting weather conditions such as rain and snow around each measurement position is provided, and the control unit 21 of the arithmetic device selectively uses a reference value corresponding to the weather conditions detected by the weather sensor. You can do that. Further, the speed of the vehicle can be easily measured (predicted) from the output signal of the sensor 12 or the like. Therefore, the memory 22 may store a plurality of reference values according to the vehicle speed. In this case, the control unit 21 of the arithmetic device may selectively use a reference value corresponding to the vehicle speed.

  When the brake incompatibility is detected by the brake incompatibility determination process, the control unit 21 outputs information indicating that the brake incompatibility has been detected. For example, the control unit 21 outputs a signal indicating that the incompatibility of the brake has been detected to the command device 14, and displays (lights up) a signal instructing the traffic light 15 to stop the vehicle by the command device 14. You may make it let it. Further, the control unit 21 may perform a display to warn the insufficiency of the brake to the command device 14. In addition, the control unit 21 may display a warning that the incompatibility of the brake has been detected on a device provided in the cab of the vehicle by wireless communication or the like. Further, the control unit 21 may notify the mobile terminal possessed by the driver or the controller of the vehicle that the incompatibility of the brake has been detected by wireless communication or the like.

Next, the flow of processing including the determination processing for the incompatibility of the brake in the arithmetic device 13 will be described.
FIG. 4 is a flowchart for explaining the flow of processing in the arithmetic device 13.
Here, it is assumed that each wheel of the vehicle to be detected for brake incompatibility passes through the second measurement position after passing through the first measurement position. Further, the temperature sensor 11A and the object detection sensor 12A are installed in pairs, the object detection sensor 12A detects the wheel at the first measurement position, and the temperature sensor 11A measures the temperature of the wheel at the first measurement position. To do. Further, the temperature sensor 11B and the object detection sensor 12B are installed in pairs, the object detection sensor 12B detects the wheel at the second measurement position, and the temperature sensor 11B measures the temperature of the wheel at the second measurement position. To do.

  In such a brake incompatibility detection system, the control unit 21 of the arithmetic device 13 detects an object detection sensor 12A that detects an object (wheel) at the first measurement position and an object (wheel) at the second measurement position. It is monitored whether or not the output signal of the object detection sensor 12B is a signal level for detecting a wheel (steps S11 and S21).

  For example, when the output signal of the object detection sensor 12A is a signal level for detecting a wheel, the control unit 21 determines that the wheel is detected at the first measurement position (YES in step S11). When the wheel is detected at the first measurement position (while the wheel is present at the first measurement position), the control unit 21 measures the wheel measured by the temperature sensor 11A that detects the wheel temperature at the first measurement position. An output signal indicating the temperature is acquired (step S12). When the output signal indicating the wheel temperature is acquired from the temperature sensor 11A, the control unit 21 stores the information indicating the wheel temperature value measured at the first measurement position in the memory 22 as the first wheel temperature Ta (step S13). ).

  Moreover, when the output signal of the object detection sensor 12B is the signal level which has detected the wheel, the control part 21 judges that the wheel is detected in the 2nd measurement position (step S21, YES). When the wheel is detected at the second measurement position (while the wheel exists at the second measurement position), the control unit 21 measures the wheel measured by the temperature sensor 11B that detects the temperature of the wheel at the second measurement position. An output signal indicating the temperature is acquired (step S22). When the output signal indicating the wheel temperature is acquired from the temperature sensor 11B, the control unit 21 stores the information indicating the wheel temperature value measured at the second measurement position in the memory 22 as the second wheel temperature Tb (step S23). ).

  In addition, the control part 21 performs the process of said step S11-S13 and the process of step S21-S23 each independently. Thereby, in the arithmetic unit 13, even when the wheel is detected at the first measurement position and the second measurement position at the same time (when the object detection sensor 12A and the object detection sensor 12B detect the wheel at the same time), The wheel temperature measured at each position can be acquired.

  When the wheel temperature measured at the second measurement position is acquired, the control unit 21 associates the second wheel temperature Tb measured at the second measurement position with the first wheel temperature Ta stored in the memory 22 ( Step S31). Here, it is assumed that the vehicle passes through the second measurement position after passing through the first measurement position. For this reason, the wheel whose temperature has been measured at the second measurement position has already been measured at the first measurement position. That is, the first wheel temperature Ta is associated with the second wheel temperature Tb as the temperature measured at the second measurement position of a certain wheel as the temperature measured at the first measurement position of the same wheel. Each wheel is detected in order from the head wheel in the traveling direction of the vehicle at the first measurement position and the second measurement position. Therefore, the control part 21 matches 1st wheel temperature Ta and 2nd wheel temperature Tb for every wheel by matching 1st wheel temperature Ta and 2nd wheel temperature Tb in the detected order.

  When the second wheel temperature Tb and the first wheel temperature Ta are associated with each wheel, the control unit 21 calculates a temperature difference ΔT between the second wheel temperature Tb and the first wheel temperature Ta for each wheel (step S32). ). When the temperature difference ΔT is calculated, the control unit 21 determines whether or not the calculated temperature difference ΔT is less than a reference value for determining brake incompatibility (step S33). As described above, the reference value is stored in the memory 22. For this reason, the control unit 21 compares the calculated temperature difference ΔT with the reference value read from the memory 22. When a plurality of reference values according to various conditions (for example, weather conditions) are stored in the memory, the control unit 21 selects a reference value according to the current conditions (such as weather conditions).

  When it is determined that the calculated temperature difference ΔT is less than the reference value (step S33, YES), the control unit 21 determines that the temperature difference ΔT is less than the reference value for all the wheels of the vehicle that are to be detected as brake incompatibility. It is determined whether or not the comparison determination is completed. When there is a wheel for which the comparison with the reference value has not been completed (step S34, NO), the control unit 21 returns to step S11 and repeatedly executes the above-described processing. Further, when there is no wheel for which the comparison determination with the reference value is not completed (when the comparison determination between the temperature difference and the reference value is completed for all wheels) (step S34, YES), the control unit 21 determines that the vehicle The process of detecting the incompatibility of the brake with respect to is terminated.

  Further, when it is determined that the calculated temperature difference ΔT is equal to or greater than the reference value (step S33, NO), the control unit 21 detects incompatibility of the brake on the wheel (step S35). When the incompatibility of the brake is detected, the control unit 21 notifies (warns) an external device such as the command device 14 that the incompatibility of the brake has been detected (step S36). As a result, the command device 14 that has been notified that the incompatibility of the brake has been detected controls the traffic light 15 to stop the vehicle, or that the instructor in the command room or the A process of notifying the driver of the vehicle is performed.

  In addition, you may make it perform the process of said step S31-S36 whenever it acquires the temperature (2nd wheel temperature Tb) of the wheel in a 2nd measurement position, or 2nd wheel temperature Tb about all the wheels. May be performed in order for each vehicle after it is stored in the memory 22.

  As described above, in the brake incompatibility detection system according to the embodiment, the temperature of each wheel at a plurality of measurement positions is measured by a temperature sensor and an object detection sensor installed at two or more measurement positions, and a plurality of measurements is performed. The difference in temperature of each wheel measured at the position (temperature rise value) is calculated, and whether or not a brake incompatibility is detected depending on whether the calculated temperature difference (temperature rise value) is greater than or equal to a predetermined reference value Determine.

  As a result, the brake incompatibility detecting device according to the embodiment can detect the incompatibility of the brake by reducing the influence of changes in the surrounding environment such as changes in the ambient temperature due to seasonal changes. As a result, it is possible to accurately detect the incompatibility of the brake regardless of the season. In addition, the temperature difference of the wheels at a plurality of points is less affected by changes in the ambient temperature due to the season and the like, and it is easy to uniquely determine the setting of the reference temperature (threshold value) for determining an abnormality. As a result, it is possible to detect the incompletion of the brake with high accuracy.

  In addition, the brake incompatibility detecting device according to the embodiment is not in the case where the wheel temperature cannot be increased even if the brake incompatibility is released immediately after departure (that is, the brake is incompletely released because the vehicle travel distance is short). Even if the wheel temperature is low), the brake incompatibility can be detected accurately. For example, it is easy to detect the incompatibility of the brake even in the section from the position of the vehicle in the yard to the main line.

  Further, the brake incompatibility detecting device according to the embodiment can be realized with a system configuration on the ground side without adding a configuration on the vehicle side. For example, in the brake incompatibility detection system according to this embodiment, a plurality of non-contact temperature sensors for measuring wheel temperatures are installed at a plurality of points on the ground side, and the outputs of these temperature sensors are processed by an arithmetic device. It is the structure to do. For this reason, it is not necessary to add a new configuration for measuring the temperature of the wheel on the vehicle side or to install special equipment. For this reason, the brake incompatibility detection system according to the embodiment can be easily installed at low cost.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  Sa ... first measurement position, Sb ... second measurement position, Tb ... temperature (first wheel temperature), Ta ... temperature (second wheel temperature), [Delta] T ... temperature difference (temperature change value), 11 (11A, 11B) ... Temperature sensor, 12 (12A, 12B) ... Object detection sensor, 13 ... Calculation device, 14 ... Command device, 15 ... Signal device, 21 ... Control unit, 22 ... Memory, 23 ... Communication unit, 24 ... Interface, 31 ... Control 32, a communication unit, 33, a traffic light control unit, 34, a display unit.

Claims (6)

A first temperature sensor for measuring a temperature of a vehicle wheel passing on the rail at a first measurement position;
A second temperature sensor for measuring a temperature of the wheel passing on the rail at a second measurement position subsequent to the first measurement position;
A calculation unit for calculating a temperature difference between the temperature of the wheel measured by the second temperature sensor and the temperature of the wheel measured by the first temperature sensor;
A determination unit for detecting whether or not the brake is in a relaxed state depending on whether or not the temperature difference calculated by the calculation unit is equal to or greater than a reference value for detecting the unrelaxed brake;
A brake incompatibility detecting device. Furthermore, a first object detection sensor that detects the presence of a wheel at the first measurement position;
A second object detection sensor that detects the presence of a wheel at the second measurement position;
The first temperature sensor outputs the temperature of the wheel while the first object detection sensor detects the wheel,
The second temperature sensor outputs the temperature of the wheel while the second object detection sensor is detecting the wheel.
The brake incompatibility detecting device according to claim 1. Furthermore, when the determination unit determines that the temperature difference is equal to or greater than the reference value, the output unit outputs a signal for stopping the vehicle.
The brake incompatibility detecting device according to any one of claims 1 and 2. Furthermore, when the determination unit determines that the temperature difference is equal to or greater than the reference value, the output unit outputs a signal for lighting a traffic signal to instruct the vehicle to stop.
The brake incompatibility detecting device according to any one of claims 1 and 2. The output unit, when the determination unit determines that the temperature difference is greater than or equal to the reference value, outputs an alarm indicating that an incompatibility of the brake has been detected,
The brake incompatibility detecting device according to any one of claims 3 and 4. Measure the temperature of the wheel of the vehicle passing on the rail at the first measurement position,
Measuring the temperature of the wheel passing on the rail at a second measurement position subsequent to the first measurement position;
Calculating the temperature difference between the wheel temperature measured at the second measurement position and the wheel temperature measured at the first measurement position;
Detecting the presence or absence of brake incompatibility depending on whether or not the calculated temperature difference is greater than or equal to a reference value for detecting incompatibility of the brake;
Brake incompatibility detection method.

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