JPH0757606B2 - Adjustment method of air spring electronic control mechanism for railway vehicle - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for adjusting a zero point of a height gauge for an air spring, a pressure gauge and a body tilt angle meter in an air spring electronic control mechanism of a railway vehicle having an air spring carriage.

[0002]

2. Description of the Related Art A railway vehicle having a bogie with an air spring is
Each air spring height is mechanically detected using a connecting rod,
The movement was transmitted to the lever of the height adjustment valve (leveling valve) to open and close the valve to correct the height and adjust the internal pressure. However, this height adjustment valve adjusts the height of the air spring individually, and when the vehicle is stopped in the cant diminishing section, supply and exhaust of the valve may continue and wheel weight loss may occur. It was

In order to eliminate the drawbacks of the height control valve, the present inventors have previously proposed an air spring electronic control method for railway vehicles.
That is, in a railway vehicle having an air spring carriage, a height gauge, a pressure gauge, an air supply valve, and an exhaust valve, which continuously measure each air spring of the front and rear carriages, are provided, and the detection signals of the height gauge and the pressure gauge are provided. Input to the controller together with the vehicle body inclination angle signal from the other inclinometer, and set the differential pressure of the front and rear air spring internal pressures on the diagonal and the same side, the set average height of the left and right air springs and the set vehicle body inclination angle. This is a control method of performing a comparison operation and opening / closing each of the air supply valve and the exhaust valve by a control signal from the controller.

For adjusting the zero point of the height adjusting valve in the conventional method for mechanically detecting the height of the air spring, a dedicated gauge is applied to each air spring to adjust the length of a connecting rod interposed between the air spring and the bogie frame. It was done by doing. However, this adjustment method requires time and effort.

A rotary encoder is usually used for the height gauge in the latter air spring electronic control method.
In adjusting the zero point of the rotary encoder, when the lever is positioned horizontally, the rotary encoder itself is rotated and fixed with a screw so that the bit of the rotary encoder shows a value corresponding to the zero point. Therefore, in order to adjust the height with an accuracy of 1 mm, when the lever length is L = 120 mm, L · Δθ = 1 mm, and therefore Δθ = 5.34 × 10 ⁻³ rad = 0.30 °, which is 0.30. Adjustment is required with a mounting accuracy of °. Therefore, it takes time to adjust.

Further, the tilt angle meter needs to be mounted with an accuracy of 0.1 °, but it takes a lot of time and labor to finely adjust the tilt angle meter within this range. Further, it takes time for the pressure gauge to adjust the resistance with an error of 0.1 atm or less.

[0007]

As described above, the zero point positions of the height gauge, pressure gauge, and tilt angle gauge in the electronic control mechanism of the air spring fluctuate due to an error in mounting and a shift due to long-term use. The true height and tilt angle may not be detected. When the zero point position of the sensor is fluctuating in this way, the control is not stabilized and the opening and closing of the valve is always maintained when there is no consistency between the sensors or when there is no physically stable state.

In view of the present situation, the present invention provides a method for constantly adjusting the zero point positions of a height gauge, a pressure gauge, and an inclinometer so that stable and accurate control can be performed even in long-term use. Is.

[0009]

In order to achieve the above object, an adjusting method of an air spring electronic control mechanism for a railroad vehicle according to the present invention is such that the air springs of the front and rear bogies of a railcar having an air spring bogie are continuously connected to each other. Using the sensors of height gauge, pressure gauge, and inclinometer, which are measured at the same time, the detection signal from each sensor is input to the controller for arithmetic processing, and the supply / exhaust valve of each air spring is controlled by the control signal from the controller. In the electronic control mechanism of the air spring for railway vehicles that opens and closes, the air pressure is the same as the atmospheric pressure and the spring is in contact with the lower stopper when the vehicle is stopped at the horizontal position. Zero-correction of spring height, pressure gauge and vehicle body inclination angle is calculated and stored, and when air is injected into each air spring and four neutral spring heights of front and rear bogies are matched with each other as a reference. , Air spring height Storing seeking zero-point correction value of the pressure and the vehicle body tilt angle, adds the zero-point correction stored in the data to detect the or by each control cycle,
The corrected air spring height, pressure value, and vehicle body tilt angle value are the physical quantities to be controlled.

[0010]

When the zero point correction value is obtained by implementing the present invention, it is essential that the following conditions are satisfied in order to keep the vehicle at a horizontal level and to stabilize electronic control.
In order to keep the railroad car at a horizontal level, it will be placed on a pit line where the horizontal level is guaranteed during monthly inspections every few months. Further, in order for the electronic control to be stable, the following relationship must be established between the heights h ₁ to h ₄ of the height gauges and the vehicle body inclination angle θ _m . b is the width between the left and right height gauges.

[0011]

[Equation 1]

Since the floor surface of the vehicle body is always a plane, it is necessary that the remaining one point exists on the plane determined by geometrically selecting any three of h ₁ to h ₄ . For example, as shown in FIG. 3, when h _1, h _{2 and} h ₄ exist on one plane, the remaining h ₃ also exists on that plane is a prerequisite for stabilizing the control.

The railway vehicle is placed on the pit line and the above conditions are met.
When satisfied, remove the air from each air spring and remove the internal pressure.
Is zero (same as atmospheric pressure), that is, punctured
For example, all heights h₀, The tilt angle θ_mTo zero
It Height correction value Δh at this time ^z, Pressure correction value ΔP_i ^zOh
And tilt angle correction value Δθ^zBy equation 1, equation 2 and equation 3
Ask and remember. However, if i = 1 to 4 in the formula,
Represent. Also, h^pankIs the correction in the puncture state
No sensor reading height, θ_m ^pankDoes not add correction
Inclination sensor reading angle, P_i ^pankDoes not add correction
It is the reading pressure of the pressure gauge.

[0014]

[Equation 2]

[0015]

[Equation 3]

[0016]

[Equation 4]

Then, the above-mentioned correction values are added to the sensor values h _i ′, P _i ′ and θ _m ′ detected for each control cycle, and the heights to be corrected are expressed as shown in equations (4), (5) and (6). h
_{The i} pressure P _i and the tilt angle θ _m are obtained.

[0018]

[Equation 5]

[0019]

[Equation 6]

[0020]

[Equation 7]

After the height h _i , the pressure P _i and θ _m to which the zero correction value has been added are obtained for each control cycle as described above,
Total control of air spring height, pressure, and vehicle body inclination angle is performed.

Also, instead of making the air springs in a punctured state, air is injected into the air springs on the pit line so that the four air springs have a constant height h _c (constant height h _c is the height that is conventionally used). A standard setting method that uses a gauge or the like to measure and align with a measurement system other than this electronic control system, and sets the inclination of the vehicle body floor surface at that time to zero (the inclination angle sensor reads θ _m ^c ) It is also possible to adopt. That is, if h ₀ is ^replaced by h _c and θ _m ^pank is ^replaced by θ _m ^c in the equations 2 and 3, the height h _i and the inclination angle of the controlled object are represented by the equations 2, 3 and 5 and 6. θ _m can be obtained. However, in this case, the correction value (ΔP _i ^z ) of the pressure gauge is not updated.

In carrying out the present invention, what is performed on the pit line is that the rail is guaranteed to be horizontal.
This is because the height of the four air springs needs to be based on the height from the horizontal plane.

The correction values of the four heights and the inclination angles are stored at the same time. Especially, in the case of claim 2, the air spring is floated neutrally. This is because there is a risk that the floor surface will not be flat because it is in a state of easy movement.

Further, it is difficult to memorize the correction values by software and correct the raw data, because it is difficult to adjust the sensor mounting in the unit of mm or the order of 0.1 mm when mounting the height gauge, and the inclination It is impossible to correct the mounting angle on the order of 0.1 ° with a goniometer. In addition, it takes time to adjust the pressure gauge with an accuracy of 0.1 atm or less, so that the pressure gauge must be performed by software.

Generally, as a condition for carrying out the present invention, a method of storing a correction value such that the height of the air spring at the time of puncture is set to, for example, -30 mm is basically sufficient. If a height adjusting valve (leveling valve) is provided, adjust the length of the connecting rod between the height adjusting valve and the bogie so that the height of the air spring is satisfied by this height adjusting valve. A set-up to decide is usually carried out. Therefore, if the zero adjustment of the electronic control mechanism is performed without changing the length of the connecting rod in order to save the trouble of readjustment, it is advantageous to float the air spring at a constant height by the height adjustment valve. For the above reason, in the invention of claim 2,
By injecting air into each air spring, the heights of the four air springs of the front and rear bogies are made to match a constant neutral height.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A case where the present invention is implemented by the railcar air spring electronic control unit shown in FIG. 1 will be described. A rotary encoder 5 is installed as a height gauge on each of the air springs 1, 2, 3 and 4 provided on the left and right sides of the front bogie 9 and the rear bogie 10 of the railway vehicle. This rotary encoder 5
Is attached to the vehicle body, a lever for measuring the rotation angle thereof is attached to the dolly side, the height is converted into an angle, and the digital signal is input to the controller 8. Further, air supply valves 11, 12, 13, and 14 for the air springs are provided in the middle of the pipe 7 that connects the source air reservoir 6 and the air springs 1 to 4, and the exhaust pipes are also provided with exhaust gas. Valves 17, 18, 19, 2
0 is further provided so as to input the vehicle body tilt angle detection signal of the lean angle meter 15 together with the detection signal of the pressure gauge 16 to the controller 8, and from the controller 8 that opens and closes each air supply valve and each exhaust valve. Wiring to convey the output of. This air spring electronic control mechanism inputs the detection signal from each sensor to the controller 8, where the set differential pressure of the inner pressure of the air spring on the diagonal line or the front and rear air springs on the same side, and the set average height of the left and right air springs. The air intake valve and the exhaust valve are opened / closed by a control signal from the controller by performing a comparison calculation with the predetermined angle and the set vehicle body inclination angle.

FIG. 2 shows a flowchart for carrying out the present invention in the above apparatus. That is, the vehicle is placed on the pit line and the air spring internal pressure is set to zero to maintain the puncture state, the detection signal from each sensor is input to the controller, the height of each air spring and the vehicle body inclination angle in the puncture state are read, A height correction value, a pressure correction value, and a vehicle body inclination angle correction value for each air spring are obtained and stored.

Then, the normal air spring control is started by the air spring control mechanism, the detection signal from each sensor is read and the correction value is read out, and the controller adds a zero correction value to the control target. The height h _i , the pressure P _i (i is 1 to 4) and the inclination angle θ _m of each of the following air springs are obtained.

Based on the height h _i and the pressure P _i inclination angle θ _m , the general electronic control of the normal air spring internal pressure, height and vehicle body inclination angle is performed. The zero point correction value is added every control cycle.

According to the second aspect of the present invention, the constant height h _c is used instead of the flat state height h ₀ in the above embodiment, and the correction target heights h _i and The normal air spring electronic control is performed by obtaining the tilt angle θ _m .

[0032]

According to the present invention, if the height, pressure, and inclination angle to be corrected are calculated by adding the correction value for each control cycle and performing control, the height, pressure, and vehicle body inclination angle of each air spring. And the stability of control is improved. Further, the mounting accuracy of each sensor is not required to be strict, and fine adjustment is unnecessary. Then, the fluctuation of the zero point of the sensor due to long-term use can be corrected instantaneously, and the control system can be stably maintained for a long time.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an example of an air spring electronic control device for a railway vehicle for carrying out the present invention.

FIG. 2 is a flow chart of control in one embodiment of the present invention.

FIG. 3 is an explanatory view showing that the height positions of the four front and rear air springs of the railway vehicle are geometrically on the same plane.

[Explanation of symbols]

 1, 2, 3, 4 Air spring 5 Rotary encoder 6 Source air reservoir 7 Piping 8 Controller 9 Front bogie 10 Rear bogie 11, 12, 13, 14 Air supply valve 15 Tilt angle meter 16 Pressure gauge 17, 18, 19, 20 exhaust valve

Claims (2)

[Claims] 1. A detection signal from each sensor is controlled by using sensors of a height gauge, a pressure gauge, and an inclinometer, which continuously measure, on each of the air springs of front and rear bogies of a railway vehicle having an air spring bogie. In the electronic control mechanism of the railcar air spring that opens and closes the air supply / exhaust valve of each air spring according to the control signal from the controller, while the vehicle is stopped at the horizontal position, With the air spring pressure as atmospheric pressure and the spring hitting the lower stopper as a reference, the zero correction values for the air spring height, pressure, and vehicle body inclination angle are calculated and stored, and the data detected at each control cycle is used. The stored zero point correction value is added, and the air spring height value after this correction,
A method for adjusting an air spring electronic control mechanism for a railway vehicle in which pressure and a vehicle body inclination angle value are physical quantities to be controlled. 2. In a railway vehicle having an air spring carriage, sensors of a height meter and an inclinometer that continuously measure are used for each air spring of the front and rear carriages of the vehicle, and a detection signal from each sensor is controlled by the controller. In the electronic control mechanism of the air spring for the railroad vehicle, in which the air supply / exhaust valve of each air spring is opened / closed by a control signal from the controller, the vehicle is stopped at the horizontal position. Air is injected into the air spring, and when the four neutral spring heights of the front and rear bogies are made to coincide with each other, the zero correction values for the air spring height and the vehicle body inclination angle are calculated and stored for control. A method for adjusting an air spring electronic control mechanism for a railway vehicle, wherein a stored zero correction value is added to data detected for each cycle, and the corrected air spring height value and vehicle body inclination angle value are used as physical quantities to be controlled.