JP2000146770A - Apparatus for monitoring underfloor of car - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for monitoring under a floor of a car which can detect an abnormality of underfloor devices of the vehicle from above the ground in a noncontact manner while the car is running and can specify which of vehicles and which of the underfloor devices of the car are abnormal. SOLUTION: A temperature-detecting means 1 set on the ground in a noncontact fashion to a train detects an underfloor temperature of a passing car with a constant cycle from a side face of the travelling train. The time series underfloor temperature of the car obtained by the temperature-detecting means 1 are input to a heat graph-forming means 3, whereby a car underfloor temperature heat graph with the car underfloor temperature on an axis of ordinate and a pass time of each car on an axis of abscissa is formed. An operating means 9 compares a part of the heat graph formed by the heat graph- forming means 3 corresponding to temperature data of an underfloor device and a temperature limit value stored in a temperature limit value-storing means 10, and outputs the comparison result.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle underfloor monitoring device for monitoring underfloor equipment provided under a vehicle floor while the vehicle is running.

[0002]

2. Description of the Related Art For example, a control device for a main motor for driving a train and a power supply device for supplying electric power used in the train are provided under the floor of the train. In that case, it is necessary to check the underfloor equipment. Therefore, at present, a train is stored in a garage, and the operation of the underfloor equipment is checked while the train is stopped.

[0003] In an operation check with the train stopped,
There are constraints such as the inability to run a train.
That is, in order to accurately inspect the underfloor equipment, it is desirable to perform the inspection while the underfloor equipment is operating normally. For this purpose, there is an increasing need to operate each underfloor device and perform inspections while the train is running.

[0004]

However, in order to inspect the underfloor equipment while the train is running, it is necessary to monitor the underfloor equipment in a non-contact manner from the ground side.

Generally, a control device, a power supply device, and the like, which are under-floor devices of a train, are heating elements, and when an abnormality occurs in these under-floor devices, the amount of heat generated by each under-floor device differs from a normal heat value. That is, the normal calorific value also becomes a large calorific value, or conversely, a small calorific value. Therefore, in order to inspect the underfloor equipment while the train is running, it is conceivable to detect the unusual heat value in a non-contact manner and determine that the underfloor equipment is abnormal.

[0006] When the amount of heat generated by the equipment under the floor of a running train is to be detected in a non-contact manner, the detection is performed outdoors. Therefore, a detection means which is resistant to disturbance and reduces erroneous detection is required. In addition, it is desirable to be able to specify which vehicle and underfloor equipment is abnormal, and there is a demand for such a underfloor monitoring device.

SUMMARY OF THE INVENTION It is an object of the present invention to be able to detect an abnormality of an underfloor device of a vehicle from the ground side in a non-contact manner during traveling.
It is still another object of the present invention to provide a vehicle underfloor monitoring device capable of identifying which underfloor equipment of which vehicle is abnormal.

[0008]

According to a first aspect of the present invention, the temperature under the floor of each vehicle is obtained in a non-contact manner from the side of a running train provided on the ground in a non-contact manner in a time-series manner at a constant cycle, and the temperature is obtained as vehicle under-floor temperature data. Based on the temperature detecting means to be detected and the time-series vehicle under-floor temperature data detected by the temperature detecting means, a heat graph of the vehicle under-floor temperature in which the vertical axis is the vehicle under-floor temperature and the horizontal axis is the passing time of each vehicle is created. Heat graph creating means, temperature limit value storage means preliminarily storing a temperature limit value for determining that the underfloor equipment installed under the vehicle floor is in an abnormal state, and the temperature of the underfloor equipment in the heat graph of the vehicle underfloor temperature And a calculation means for comparing the portion corresponding to the data with the temperature limit value stored in the temperature limit value storage means and outputting the comparison result.

According to the first aspect of the present invention, the temperature detecting means provided on the ground in a non-contact manner with the train detects the temperature under the floor of the passing vehicle at a constant cycle from the side of the running train. The time-series vehicle under-floor temperature obtained by the temperature detecting means is input to the heat-graph creating means, and a heat graph of the vehicle under-floor temperature having a vertical axis representing the vehicle under-floor temperature and a horizontal axis representing the passing time of each vehicle is created. The calculating means compares a portion corresponding to the temperature data of the underfloor equipment in the heat graph created by the heat graph creating means with the temperature limit value stored in the temperature limit value storage means, and outputs the comparison result.

[0010] The invention according to claim 2 is a temperature detecting means provided on the ground, which obtains the temperature under the floor of each vehicle in a non-contact manner from the side of the running train in a time-series manner at a constant cycle and detects the temperature as the vehicle floor temperature data. A speed detecting means for detecting a vehicle speed in a time series in the same cycle as the temperature detecting means, a vehicle position detecting means for detecting a passing time of a front end and a rear end of each vehicle of the running train, and a temperature detecting means. Heat graph creating means for creating a heat graph of the vehicle under-floor temperature, wherein the vertical axis is the vehicle under-floor temperature and the horizontal axis is the passing time, based on the time-series vehicle under-floor temperature data detected in The horizontal axis of the heat graph created by the heat graph creation means based on the passing time of each vehicle and the time-series vehicle speed detected by the speed detection means is converted into a distance, and the heat graph corresponding to the length of each vehicle Heat graph repair to fix Means, a temperature limit value curve storage means for storing in advance a temperature limit value curve under the vehicle floor for each vehicle type corresponding to the length of each vehicle, a heat graph and a temperature limit value curve corrected by the heat graph correction means. A calculating means for comparing the temperature limit value curve stored in the storage means and outputting a result of the comparison.

According to the second aspect of the present invention, the temperature detecting means provided on the ground in a non-contact manner with the train detects the temperature under the floor of the passing vehicle at a constant cycle from the side of the running train. The time-series vehicle under-floor temperature obtained by the temperature detecting means is input to the heat-graph creating means, and a heat graph of the vehicle under-floor temperature having a vertical axis representing the vehicle under-floor temperature and a horizontal axis representing the passing time of each vehicle is created. The heat graph correction means converts the horizontal axis of the heat graph created by the heat graph creation means based on the passing time of each vehicle detected by the vehicle position detection means and the time-series vehicle speed detected by the speed detection means to a distance. Converted and corrected to a heat graph corresponding to the length of each vehicle. Then, the arithmetic unit compares the heat graph corrected by the heat graph correcting unit with the temperature limit value curve stored in the temperature limit value curve storage unit, and outputs the comparison result.

[0012] The invention of claim 3 is claim 1 or claim 2.
In the invention, the temperature detection means detects a value obtained by subtracting the outside air temperature from the detected vehicle underfloor temperature as vehicle underfloor temperature data.

According to the third aspect of the present invention, the under-floor temperature corresponding to the calorific value of the under-floor equipment is detected by subtracting the outside air temperature from the detected under-floor temperature. Therefore, the temperature corresponding to the calorific value of the underfloor equipment can be detected without being affected by the outside air temperature.

[0014] The invention of claim 4 is the invention of claim 1 or claim 2.
In the invention, the temperature detecting means scans under the floor of the vehicle in a vertical direction every cycle to obtain a plurality of temperature data, and calculates the number of the temperature data to the outside air temperature from an added value of the plurality of temperature data. The multiplied value is subtracted, and the value obtained by the subtraction is detected as vehicle under-floor temperature data for one cycle.

According to the fourth aspect of the present invention, the temperature detecting means obtains a plurality of temperature data in the vertical direction under the vehicle floor, adds them, and subtracts the added number of outside air temperatures. Therefore, it is possible to detect the temperature corresponding to the amount of heat generated by the underfloor equipment with multiple times the sensitivity, and to improve the temperature detection accuracy with respect to disturbance.

[0016]

Embodiments of the present invention will be described below. FIG. 1 is a block diagram showing a first embodiment of the present invention. This underfloor monitoring device is installed on the ground side near the train track and in a place that does not violate building limits.

The temperature detecting means 1 of the underfloor monitoring device detects the temperature under the floor of the vehicle, and is provided on the ground in a non-contact manner with the train. Then, the under-floor temperature of the passing vehicle is detected at regular intervals from the side of the running train. This temperature detecting means 1 is constituted by an infrared camera, and detects the surface temperature of the underfloor equipment while scanning under the floor of each train of the train in the vertical direction.

That is, the temperature detecting means 1 scans under the floor of the vehicle in the vertical direction in each cycle, and
Get the temperature data of That is, temperature data at N points different from each other in the vertical direction with respect to the underfloor equipment is acquired in one cycle.
Then, these N temperature data are added. Therefore, the data for one cycle indicates a value that is N times the actual underfloor temperature, thereby improving the S / N ratio.

Next, a value obtained by multiplying the outside air temperature detected by the outside air temperature detecting means 2 by N is subtracted from the added value.
This is because each temperature data is a value obtained by adding the surface temperature of the underfloor equipment to the outside air temperature, so that the temperature with respect to the calorific value of the underfloor equipment is obtained. Therefore, the value obtained by this subtraction indicates a temperature value that is approximately N times the temperature of the underfloor equipment with respect to the calorific value of the underfloor equipment. Temperature detection means 1
Detects this value as vehicle under-floor temperature data for one cycle.

The heat graph creating means 3 is based on the time-series vehicle under-floor temperature data obtained by the temperature detecting means 1, and calculates the heat of the vehicle under-floor temperature whose vertical axis is the vehicle under-floor temperature and whose horizontal axis is the passing time of each vehicle. Create a graph. FIG. 2 shows a heat graph of the temperature under the vehicle floor of one vehicle created by the heat graph creating means 3.

In FIG. 2, the temperature detecting means 2 is a vehicle 4
Is scanned vertically under the floor every 1 cycle. That is, a plurality of (N) temperature data are acquired by scanning the height h under the vehicle floor along the scanning line 5. The detected N pieces of temperature data are added in the vertical direction for each scanning line 5, and the outside air temperature is subtracted (the value obtained by multiplying the outside air temperature by N) to obtain one cycle of vehicle under-floor temperature data. Is calculated. Then, the under-floor temperature data of each cycle is plotted in time series by the thermal graph creating means 3 to create a thermal graph characteristic curve 6.

Here, the underfloor equipment 7 is provided under the floor of the vehicle, and there is a temperature difference between the part where the underfloor equipment 7 is arranged and the part where the underfloor equipment 7 is not arranged. The infrared camera detects the temperature difference as the surface temperature of the underfloor equipment 7. Since the wheels 8 are arranged under the floor of the vehicle in addition to the underfloor equipment 7, the surface temperature of the wheels 8 is also detected.

The thermal graph characteristic curve 6 thus created is input to the calculating means 9 and the temperature limit value storing means 1
It is compared with a temperature limit value of the underfloor equipment 7 stored in advance at 0. That is, the calculating means 9 compares the portion corresponding to the temperature data of the underfloor equipment 7 in the heat graph characteristic curve 6 created by the heat graph creating means 3 with the temperature limit value stored in the temperature limit value storage means 10. Since the temperature characteristics of the wheels 8 under the floor of the vehicle 4 are known, the temperature data of that part is excluded and the temperature data of the part where the underfloor equipment 7 is arranged is compared with the temperature limit value. Then, the comparison result is output to the output unit 11. In addition, it is also possible to include the temperature data of the wheel 8 and compare it with the limit value.

In the above description, the outside air temperature detecting means 2 is provided, and the outside air temperature is subtracted from the temperature data obtained by the temperature detecting means 1 to detect the vehicle under-floor temperature data with respect to the calorific value of the under-floor equipment 7. However, the outside air temperature detecting means 2 can be omitted. In this case, a temperature limit value to which the outside air temperature is added is set as a limit value previously stored in the temperature limit value storage means 10. A plurality of temperature limit values are prepared in advance according to the season (change in the outside air temperature), and can be arbitrarily selected according to the season.

Since the position and characteristics of the underfloor equipment 7 to be arranged are different depending on the type of the vehicle, the temperature limit value storage means 10 previously stores a temperature limit value corresponding to the vehicle type. On the other hand, the temperature detecting means 1 is obtained by adding a plurality of temperature data under the vehicle floor in the vertical direction as the vehicle under-floor temperature data for one cycle. May be used.

As described above, the underfloor monitoring device according to the first embodiment detects the surface temperature of the underfloor equipment 7 of the vehicle in the vertical direction while detecting it from the ground side and the side of the train in a non-contact manner. The detected temperature data is added in the vertical direction and added for each scanning line 5 to calculate one cycle of vehicle under-floor temperature data. Therefore, since the temperature difference between the underfloor equipment and the ambient temperature can be detected as a larger value, the S / N ratio is improved.

Then, the thermal graph characteristic curve created based on the under-floor temperature data is compared with a preset temperature limit value, and the result of the comparison is displayed on the output means 11 or output as a signal. Thereby, the inspection of the underfloor equipment 7 can be properly performed while the train is running.

Next, a second embodiment of the present invention will be described. FIG. 3 is a block diagram showing a second embodiment of the present invention. This second embodiment is different from the first embodiment shown in FIG. 1 in that a speed detecting means 12 for detecting the speed of the vehicle and a vehicle position detecting means 1 for detecting the position of the vehicle.
3 and a heat graph correction means 14 are additionally provided, and a temperature limit value curve storage means 15 in which a temperature limit value curve is previously stored is provided in place of the temperature limit value storage means 10.

According to the present invention, the underfloor temperature of the vehicle 4 is measured during the running of the train.
The length of the thermal graph characteristic curve created by the thermal graph creating means 3 differs for each vehicle 4. This is because the horizontal axis of the heat graph is indicated by the passing time of the vehicle. Therefore,
In the second embodiment, the heat graph created by the heat graph creation means 3 is corrected to a heat graph characteristic curve corresponding to the length of the vehicle. That is, the traveling speed of the vehicle 4 is detected, and the thermal graph characteristic curve is corrected by the thermal graph correction means 14. Then, it is easy to determine at which position under the floor of the vehicle 4 the underfloor equipment 7 is installed.

In FIG. 3, the same components as those shown in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. The speed detecting means 12 is constituted by a light reflection type sensor, and detects the traveling speed of the vehicle based on the reflected light output from the speed detecting means 12. The speed detecting means 12 detects the vehicle speed in the same cycle as the temperature detecting means 1 in time series.

On the other hand, the vehicle position detecting means 13 is also constituted by a light reflection type sensor. Since the light output from the vehicle position detecting means 13 is reflected at the vehicle portion of the train, it is recognized as a vehicle portion by the reflected light, and the coupler portion of the vehicle 4 is recognized as a coupler portion because there is no reflected light. As a result, the passing time of the front end portion and the rear end portion of each vehicle of the running train is detected, and the vehicle position is detected.

The heat graph correcting means 14 is generated by the heat graph generating means 3 based on the passing time of each vehicle detected by the vehicle position detecting means 13 and the time-series vehicle speed detected by the speed detecting means 12. The horizontal axis of the heat graph is converted into a distance and corrected to a heat graph corresponding to the length of each vehicle. Then, the arithmetic unit 9 compares the heat graph corrected by the heat graph correcting unit 14 with the temperature limit value curve stored in advance in the temperature limit value curve storage unit 15 and outputs the comparison result to the output unit 11.

FIG. 4 shows a thermal graph characteristic curve created by the thermal graph creating means 3 for a train connecting a plurality of vehicles. As shown in FIG. 4, the running speed of the train is not always constant, so that when the running speed of the train changes, the length of each vehicle 4 becomes different. This is because the transit time of each vehicle is different even if the length of the vehicle is the same because the horizontal axis represents the transit time of the train. When the traveling speed is slow, the length of the vehicle 4 becomes large like the fourth vehicle, and when the traveling speed is fast, the length of the vehicle 4 becomes small like the first and seventh vehicles.

Therefore, in the second embodiment, the thermal graph is converted such that the horizontal axis is the vehicle length and the length of each vehicle is a length corresponding to the length. This conversion is performed as follows.

That is, the heat graph correcting means 14 is first obtained by the heat graph creating means 3 based on the passing time at the front end and the passing time at the rear end of the vehicle 4 detected by the vehicle position detecting means 13. The heat graph characteristic curve is divided for each vehicle. Then, the thermal graph characteristic curve for each vehicle 4 is expanded and contracted in the horizontal axis direction.

The degree of the expansion / contraction is determined by the product of the traveling speed of each vehicle 4 and the passing time of each vehicle 4. Although the length of one vehicle is known, the length of the vehicle on the thermal graph characteristic curve obtained in this manner may not match the known length of one vehicle due to a detection error or the like. . Therefore, the thermal graph characteristic curve of each vehicle 4 is expanded and contracted again in the horizontal axis direction by the ratio of the length between the front end portion and the rear end portion of the vehicle 4 to the known length for one vehicle. In this way,
A thermal graph characteristic curve corresponding to the vehicle 4 is obtained.

For the thermal graph characteristic curve obtained as described above, the temperature limit value curve storage means stores the upper temperature limit value curve 16 and the lower temperature limit value curve 1 as shown in FIG.
7 is stored in advance. The upper temperature limit value curve 16 and the lower temperature limit value curve 17 are predetermined temperature limit value curves according to the type of the vehicle, and take into account in advance the arrangement positions and characteristics of the underfloor equipment that differ depending on the type of the vehicle. And memorize it.

The calculating means 9 calculates a heat graph characteristic curve 6 corresponding to the length of the vehicle 4 obtained by the heat graph correcting means 14,
The temperature limit value curves 16 and 17 stored in advance in the temperature limit value curve storage means 15 are compared, and the heat graph characteristic curve 6 is compared.
Is within the upper temperature limit value curve 16 and the lower temperature limit value curve 17, it is determined to be normal. For example, as shown in FIG.
Is larger than the upper temperature limit value curve 16 is regarded as abnormal. Further, since the thermal graph characteristic curve 6 corresponds to the length and type of the vehicle 4, it is possible to specify which underfloor equipment 7 of which vehicle 4 is abnormal.

As described above, the underfloor equipment 7 mounted on the train differs depending on the type of the vehicle such as an electric car or an accompanying car. Therefore, the upper temperature limit value curve 16 and the lower temperature limit value curve as shown in FIG. Is stored in advance in the temperature limit value curve storage means 15 as a different pattern for each vehicle type, and is compared with the thermal graph characteristic curve in a temperature limit value curve pattern corresponding to each vehicle type. In this case, since the combination of vehicle types in one formation is fixed, the vehicle type can be specified by counting the information of the vehicle portion obtained by the vehicle position detecting means 13.

As described above, according to the second embodiment, the running speed of the vehicle at the time of detecting the reference position of the vehicle and the temperature under the floor of the vehicle is detected, and the thermal graph characteristic curve is plotted on the horizontal axis as the distance. Since the correction is made to the heat graph characteristic curve, it is possible to determine at which position in the vehicle traveling direction the underfloor equipment 7 is located. Therefore, the temperature limit value curve corresponding to the position of the underfloor equipment 7 in the vehicle traveling direction is stored in advance, and the underfloor equipment of which vehicle is abnormal by comparing the heat graph characteristic curve with the temperature limit value curve. Can be specified, and the underfloor equipment of the vehicle can be properly monitored according to the vehicle type.

[0041]

As described above, according to the present invention, a heat data characteristic curve is created by measuring the heat generated from the underfloor equipment of a vehicle from the ground side in a non-contact manner and compared with a predetermined temperature limit value. Therefore, the abnormality of the underfloor equipment of the vehicle can be detected in a non-contact manner from the ground side while the train is running.

Since the horizontal axis of the thermal data characteristic curve is converted into a distance, the thermal graph characteristic curve can be associated with the position of the underfloor equipment. Therefore, by comparing the thermal graph characteristic curve with a predetermined temperature limit value curve, it is possible to detect an abnormality of the underfloor equipment.

Further, since the temperature due to the heat generated by the underfloor equipment is detected, it is possible to monitor the abnormality of the underfloor equipment without being affected by the outside air temperature.

Further, since the temperature values measured by scanning in the vertical direction are added and the added temperature value is calculated for each line to create a heat graph, the S / N ratio is improved.

[Brief description of the drawings]

FIG. 1 is a block diagram of a underfloor monitoring device according to a first embodiment of the present invention.

FIG. 2 is a vehicle 1 created by a heat graph creating means.
It is explanatory drawing of the heat-graph characteristic curve of the vehicle under-floor temperature of a vehicle.

FIG. 3 is a block configuration diagram of an underfloor monitoring device according to a second embodiment of the present invention.

FIG. 4 is an explanatory diagram of a thermal graph characteristic curve created by a thermal graph creating means for a train in which a plurality of vehicles are connected.

FIG. 5 is an explanatory diagram of a temperature limit value curve according to the second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Temperature detection means 2 Outside air temperature detection means 3 Heat graph creation means 4 Vehicle 5 Scanning line 6 Heat graph characteristic curve 7 Underfloor equipment 8 Wheel 9 Calculation means 10 Temperature limit value storage means 11 Output means 12 Speed detection means 13 Vehicle position detection means 14 Heat graph correction means 15 Temperature limit value curve storage means 16 Upper temperature limit value curve 17 Lower temperature limit value curve 18 Abnormal part

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Shoichi Saito Inventor 2-1-2 Yoyogi Shibuya-ku, Tokyo East Japan Railway Company (72) Inventor Keiichi Kamata 1-Toshiba-cho, Fuchu-shi, Tokyo Stock Toshiba Fuchu Plant

Claims (4)

[Claims] 1. A temperature detecting means provided on the ground for acquiring the under-floor temperature of each vehicle in a non-contact manner from a side of a running train in a time-series manner at a constant cycle and detecting the temperature as under-floor temperature data;
Heat graph creating means for creating a heat graph of a vehicle underfloor temperature in which the vertical axis is the vehicle underfloor temperature and the horizontal axis is the passing time of each vehicle based on the time-series vehicle underfloor temperature data detected by the temperature detecting means, Temperature limit value storage means for storing in advance a temperature limit value for determining that an underfloor device installed under the vehicle floor is in an abnormal state, and corresponding to temperature data of the underfloor device in a heat graph of the vehicle underfloor temperature. An under-floor monitoring device for a vehicle, comprising: a calculating unit that compares a part to perform the operation with a temperature limit value stored in the temperature limit value storage unit and outputs a result of the comparison. 2. A temperature detecting means provided on the ground, which acquires the underfloor temperature of each vehicle in a non-contact manner from the side of the running train in a time-series manner at a constant cycle and detects the temperature as underfloor temperature data;
Speed detecting means for detecting a vehicle speed in a time series in the same cycle as the temperature detecting means, vehicle position detecting means for detecting a passing time of a front end portion and a rear end portion of each vehicle of the running train; and A heat graph creating means for creating a heat graph of a vehicle underfloor temperature in which the vertical axis is the vehicle underfloor temperature and the horizontal axis is the passing time, based on the time series vehicle underfloor temperature data detected by the detecting means, and the vehicle position detecting means The horizontal axis of the heat graph created by the heat graph creation means is converted into a distance based on the passing time of each vehicle detected in the above and the time-series vehicle speed detected by the speed detection means, and the distance of each vehicle is calculated. Heat graph correction means for correcting to a heat graph corresponding to the length, temperature limit value curve storage means for storing in advance a temperature limit value curve under the vehicle floor for each vehicle type corresponding to the length of each vehicle, The heat graph An under-floor monitoring device for a vehicle, comprising: a calculation unit that compares the heat graph corrected by the correction unit with the temperature limit value curve stored in the temperature limit value curve storage unit and outputs the comparison result. . 3. The vehicle according to claim 1, wherein said temperature detecting means detects a value obtained by subtracting an outside air temperature from the detected vehicle underfloor temperature as vehicle underfloor temperature data. Underfloor monitoring equipment. 4. The temperature detecting means scans under the floor of the vehicle in a vertical direction for each cycle to acquire a plurality of temperature data, and calculates an outside temperature from an added value of the plurality of temperature data. 2. The apparatus according to claim 1, wherein a value obtained by multiplying the number of data is subtracted, and a value obtained by the subtraction is detected as vehicle under-floor temperature data for one cycle.
Or the underfloor monitoring device for a vehicle according to claim 2.