JP2007198741A - Method and apparatus for detecting overload of rail vehicle - Google Patents

Abstract

A vehicle overload detection method and apparatus for determining the presence or absence of an overload applied to a carriage by detecting a spring pressure of an air spring that supports a vehicle body.
In a rail vehicle that supports a vehicle body 1 on a carriage 31 (32) via air springs 21, 22 (23, 24), two air springs 21, 22 ( 23, 24) is obtained by measuring the air pressures P1, P2 (P3, P4) with the static converters 41, 42 (43, 44), and then adding them with the arithmetic processor 5 to divide them into two. When this value exceeds the set value, it is determined that there is an overload, and an overload signal is output. The fluctuation of the internal pressure due to the swing of the vehicle is canceled by the addition process, and the vehicle weight can be detected with the same accuracy as when the vehicle is not swinging.
[Selection] Figure 1

Description

  The present invention relates to a detection method and apparatus for detecting whether or not a rail vehicle such as a railway vehicle or a monorail car is overloaded.

  In a normal rail vehicle, a vehicle body is supported on a carriage via an air spring. Patent document 1 is mentioned as an example of detecting the vehicle weight by a passenger | crew's fluctuation | variation. This example is a railway vehicle load-bearing device that converts air pressure supplied from a plurality of air springs into electrical signals by an aeroelectric converter and outputs the signals as a load-bearing signal.

In the above-described railway vehicle load-bearing apparatus, the load signal due to the air pressure varies depending on the vertical vibration of the vehicle and the distance between passengers in the vehicle. In addition, when the track is inclined in the vehicle body width direction, the vehicle body swings in the vehicle body width direction, and the air spring pressure of each air spring in the vehicle body width direction fluctuates. The signal also fluctuated, making it difficult to determine the correct overload.
JP-A-5-199604

  An object of the present invention is to provide an overload detection method and apparatus that can easily determine the overload state of a rail vehicle by offsetting fluctuations in the internal pressure signal of the air spring caused by the swing of the vehicle. is there.

  According to the rail vehicle overload detection method of the present invention, in the rail vehicle in which the vehicle body is supported on the carriage via the air spring, the plurality of air springs disposed on the one carriage. This can be achieved by measuring the air pressure of the gas, obtaining an added value of the measured values, and determining that the load is overloaded when the added value exceeds the set value.

  In addition, according to the rail vehicle overload detection device of the present invention, the air pressure of the plurality of air springs is measured in a rail vehicle that supports the vehicle body via a plurality of air springs on one carriage. An aeroelectric converter, and an arithmetic processor for adding the measured values of the aeroelectric converter, the arithmetic processor being overloaded when the added value exceeds a preset set value. Can be achieved by outputting.

  According to the above, the air pressure of a plurality of air springs on one carriage among the carriages provided on the rail vehicle is measured, and the added value (average value when apportioning) is obtained, so the vehicle body swings Even so, it is possible to accurately detect that the air pressure fluctuation is canceled and the vehicle weight exceeds the specified value.

  Hereinafter, an embodiment of a rail vehicle overload detection device according to the present invention will be described with reference to FIGS. 1 and 2 are explanatory views showing a vehicle for one vehicle in which the vehicle is supported on a carriage via an air spring.

  As shown in FIGS. 1 and 2, the vehicle body 1 is supported by a front carriage 31 through front air springs 21 and 22 and by a rear carriage 32 through rear air springs 23 and 24. The weight of the vehicle body is added to the air springs 21, 22, 23, and 24.

  In locations where the pressures P1, P2, P3, and P4 of the air springs 21, 22, 23, and 24 can be measured, aeroelectric converters 41, 42, 43, and 44 are provided, respectively. The internal pressure value P2 of the air spring 21 is the internal pressure signal S1, the internal pressure value P2 of the air spring 22 is the internal pressure signal S2, the internal pressure value P3 of the air spring 23 is the internal pressure signal S3, The pressure value P4 is converted into an internal pressure signal S4. Internal pressure signals S 1, S 2, S 3, S 4 output from the aeroelectric converters 41, 42, 43, 44 are input to the arithmetic processor 5.

As the air spring pressures P1, P2, P3, and P4 change due to the swing of the vehicle, the internal pressure signals S1, S2, S3, and S4 also change. When the internal pressure signals when the vehicle is not tilted in the width direction of the vehicle body are S10, S20, S30, and S40, and the fluctuation amounts of the internal pressure signals due to the tilt of the vehicle are ΔS1, ΔS2, ΔS3, and ΔS4, Each relationship is
S1 = S10 + ΔS1
S2 = S20 + ΔS2
S3 = S30 + ΔS3
S4 = S40 + ΔS4
Indicated by

Here, since the fluctuation amount of each internal pressure signal is the fluctuation amount caused by the swing of the vehicle, as shown in FIG.
ΔS1 = −ΔS2,
ΔS3 = −ΔS4
, The load L1 applied to the front carriage 31 is the sum of the loads applied to the air springs 21 and 22, and the load L2 applied to the rear carriage 32 is the sum of the loads applied to the air springs 23 and 24. It becomes.
L1 = K1. (S1 + S2) = K1. (S10 + S20)
L2 = K2 · (S3 + S4) = K2 · (S30 + S40)
However, K1 and K2 are calculated as coefficients obtained from the effective area of the air spring.

Further, the vehicle weight L is the sum of the load L1 applied to the front carriage 31 and the load L2 applied to the rear carriage 32.
L = L1 + L2 = K1 · (S10 + S20) + K2 · (S30 + S40)
Indicated by

As described above, since the fluctuation amount of the internal pressure signal due to the vehicle swing is canceled by the above calculation, the vehicle swings the load L1 applied to the front carriage 31, the load L2 applied to the rear carriage 32, and the vehicle weight L. Even when the vehicle is running, it can be detected that the vehicle weight exceeds the specified value with the same accuracy as when the vehicle is not swinging. Actually, the relationship between ΔS1, ΔS2, ΔS3, and ΔS4 is the amount of fluctuation of the internal pressure signal.
ΔS1≈−ΔS2
ΔS3≈−ΔS4
In many cases.

Therefore, as shown in the following equation, the load applied to each of the carts 31 and 32 can be calculated by adding the added value for 2 minutes or adding. When it divides into two, it can be said that it takes an average value. If you don't care about the average, you don't have to divide into two minutes.
(ΔS1 + ΔS2) / 2
(ΔS3 + ΔS4) / 2

  This calculated value is compared with the set value, and if it is excessive, it is determined that it is an overload and is output.

The top view of the vehicle which shows the Example of this invention. The side view of FIG. The change figure of the air pressure of an air spring.

Explanation of symbols

1: Vehicles 21, 22, 23, 22: Air springs 31, 32: Bogies 41, 42, 43, 44: Aeroelectric converters 5: Arithmetic processors P1, P2, P3, P4: Air spring pressures S1, S2, S3, S4: Air spring internal pressure signal

Claims (7)

In a rail vehicle that supports a vehicle body on a carriage via an air spring,
The air pressure of the plurality of air springs arranged on one of the carts is measured, an added value of the measured values is obtained, and the vehicle is overloaded when the added value exceeds a set value. To judge,
An overload detection method for a rail vehicle characterized by the above. In the rail vehicle overload detection method according to claim 1,
The added value is apportioned by the added amount and calculated as an average value, and the set value is set as the average value,
An overload detection method for a rail vehicle characterized by the above. In a rail vehicle that supports a vehicle body via a plurality of air springs on one carriage,
An aerodynamic converter that measures the air pressure of the plurality of air springs, and an arithmetic processor that adds the measured values of the aerodynamic converter;
The arithmetic processor outputs an overload when the added value exceeds a preset set value;
A rail vehicle overload detection device characterized by the above. In the overload detection device of the rail vehicle according to claim 3,
The added value is apportioned by the added amount and calculated as an average value, and the set value is set as the average value,
A rail vehicle overload detection device characterized by the above. In the overload detection device for rail vehicles according to claim 3 or 4,
The plurality of air springs are respectively arranged at symmetrical positions of the vehicle on the one carriage.
A rail vehicle overload detection device characterized by the above. In the overload detection device of the rail vehicle according to any one of claims 3 to 5,
The carriages are a front carriage and a rear carriage respectively arranged before and after the vehicle,
The plurality of air springs are respectively disposed on the front carriage and the rear carriage,
The arithmetic processing unit adds the measurement value for each of the front carriage and the rear carriage,
The set value is set for each of the front carriage and the rear carriage,
A rail vehicle overload detection device characterized by the above. In the overload detection device of the rail vehicle according to any one of claims 3 to 5,
The carriages are a front carriage and a rear carriage respectively arranged before and after the vehicle,
The plurality of air springs are respectively disposed on the front carriage and the rear carriage,
The arithmetic processor adds all the measured values for the front carriage and the rear carriage,
The set value is set for all vehicles;
A rail vehicle overload detection device characterized by the above.

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