JPS6054444B2 - Transition curve correction device for track straightening machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transition curve correction device for a track straightening machine that can run on a track.

As is well known, in the past, when modifying a transition curve on a curved section of a track, it was necessary to take into consideration the track length, track radius, and type of track curve. Modification work was carried out by changing the setting conditions step by step, depending on the track conditions.

For this reason, track correction work on tracks laid in complex terrain not only requires a great deal of effort and time, but also requires great skill, resulting in low work efficiency and uneven track finish. The problem was low accuracy. The present invention was made in order to eliminate the above-mentioned drawbacks of the transition curve correction device in the track straightening machine, and it automatically and step-by-step performs a series of operations corresponding to the conditions necessary for the transition curve correction work. The present invention attempts to provide a transition curve correction device for a track straightening machine that allows the track straightening machine to move without moving.

The details will be explained below with reference to the drawings.

FIG. 1 is a wiring diagram of an embodiment of the track correction device of the present invention.
Its main parts are a traveling distance detector 1, a slow curve length setting device 2, a trajectory correction function setting device 3, and a first voltage dividing circuit 4a.
and a second voltage dividing circuit 4b.
, an operational amplifier 5 that sends a correction symbol to the correction device, and a comparator 6 that generates a correction end signal.

The travel distance detector 1 described above is composed of, for example, a potentiometer, and can obtain a voltage e1 proportional to the travel distance of the track straightening machine from the rotational speed of the wheels 8 of the track straightening machine connected via the clutch 7. It is structured as follows.

This voltage e1 is then amplified by an amplifier A, and its output E2 is input to a transition curve length setting device 2. The transition curve length setter 2 is also composed of, for example, a potentiometer, and when the output E2 of the mileage detector 1 amplified by the amplifier A is input, and the transition curve length is set by dial operation (not shown), It is configured to always output a constant voltage, for example, 1V, at the end of traveling through the transition curve length.

Therefore, when the track correction machine travels on a transitional curve, a voltage proportional to the travel distance is output to the track correction function setting device 3, with the maximum voltage being 1V. Also, trajectory correction function setting device 3
is composed of a plurality of function generating circuits D, B, C, and E and selection switches 8a and 8b.
is an interlocking switch) The voltage E4 is converted into a predetermined function by inputting the output voltage E3 of the transition curve setting device 2.
is now output. For example, in FIG. 1, function generating circuit B obtains an output voltage corresponding to the condition when the cant amount increases proportionally, as shown in FIG. An output voltage as shown in FIG. 2b, which is the opposite of , is obtained. Further, in the function generation circuits C and E, as shown in FIG. 2C and d, respectively,
An output voltage corresponding to a condition where the cant amount increases or decreases in a sinusoidal manner is obtained. Therefore, by operating the selection switch 8a, either uphill or downhill slope is selected, and by operating the selection switch 8b, the linearity of the function of the transition curve is selected. Ru. Note that the function generation circuit D,
B, C, and E are not limited to these four types, and a circuit that generates any function can be used as required. In short, any type of trajectory correction function setting device 3 can be used as long as it receives the output E3 of the transition curve length setting device 2, converts it into a necessary function, and outputs the output E4. Further, the cant amount setting device 4 includes a first voltage dividing circuit 4a which takes the output E4 of the trajectory correction function setting device 3 as an input and divides it so that the maximum voltage becomes an output corresponding to the maximum cant amount, and a constant voltage It has a second voltage dividing circuit 4b that divides the voltage supplied from the source into an output commensurate with the maximum cant amount, and these are constituted by, for example, two coaxial potentiometers.

In the figure, R1 is a variable resistor for input adjustment. Therefore,
The first voltage dividing circuit 4a outputs a voltage E5 proportional to the amount of travel, which becomes a voltage commensurate with the amount of cant set by a dial (not shown) when the track straightener travels the entire length of the transition curve. The voltage E corresponding to the set cant amount is always output from the second voltage dividing circuit 4b.
6 will be output.

Further, the operational amplifier 5 is a comparison calculation circuit 5 that compares and calculates the output voltage E5 of the first voltage dividing circuit 4a of the cant amount setter 4 and the output voltage E7 of the correction amount detector 11 of the track straightening machine.
a and its output voltage E8 and outputs a correction signal to a correction mechanism consisting of, for example, a servo motor SM.
The speed voltage of the tacho generator G, which is directly connected to the servo motor SM, is fed back to the amplifier circuit 5b, and automatic control is performed so that it rotates at a stable speed.

As the correction amount detector 11, a known displacement detector that detects the difference in height between the left and right sides of the reference side track and the anti-reference side track of the track straightening machine as a potential difference can be used.

Furthermore, the comparator 6 that generates the correction signal compares the output E5 of the first voltage divider circuit 4a of the cant amount setter 4 with the output E6 of the second voltage divider circuit 4b, and determines that they match. When this occurs, a signal voltage E9 is output, and the output voltage is waveform-shaped by the waveform shaping circuit 12 to operate the relay RY and cut off the input to the correction device.

In this embodiment, the input to the correction mechanism is cut off using the output of the comparator 6, but it is also possible to operate the clutch 7 to disengage the wheel 8 from the distance detector 1. You can also. Next, the operation of the device of the present invention will be explained. In the present invention, when the trajectory correction machine first advances to the entrance of the transition curve, the length and maximum cant amount of the transition curve are set in the transition curve length setting device 2 and the cant amount setting device 4, respectively (at this time, the cant amount is The first voltage divider circuit 4a and the second voltage divider circuit 4b of the quantity setting device are composed of coaxial potentiometers, so the same value is set to both circuits at the same time), and also the trajectory correction function setting. A predetermined trajectory correction function is set by operating the selection switches 8a and 8b of the device 3 (in the embodiment, a function indicating the ascending slope in the sine reduction method is set). After that, when the clutch 7 is engaged to move the track correction machine onto the transition curve, the travel distance detector 1 outputs a voltage e1 proportional to the travel distance, and this output is applied to the transition curve length setting device. 2, the pressure is divided at a constant ratio so that the output is always constant when traveling the entire length of the transition curve, and is further corrected to the function linearity set by the trajectory correction function setting device 3, and then sent to the cant amount setting device 4. is input. Next, this input is divided by the cant amount setter 4 at a ratio that causes the correction mechanism to make a correction corresponding to the maximum cant amount when traveling the entire length of the transition curve, and is input to the operational amplifier 5. Ru. This input indicates the cant amount corresponding to the traveling distance on the set transition curve, and is compared with the output signal E7 corresponding to the actual cant amount input from the correction amount detector 11 in the comparison calculation circuit 5a. The differential voltage is amplified by the amplifier 5b to drive the servo motor SM and make necessary corrections.

When the trajectory has a predetermined cant amount, the output of the first voltage dividing circuit of the cant amount setting device 4 and the correction amount detector 1
Since the output E7 of one servo motor becomes equal to the other, the output of the arithmetic comparator 5 becomes zero, and one servo motor SM is not driven. In this way, when the adjustment work is completed over the entire length of the transition curve, the output voltage E3 of the transition curve length setting device 2 reaches its maximum value, and the first voltage dividing circuit 4a of the cant amount setting device 4 and the second
Since the output voltages E5 and e6 of the voltage dividing circuit 4b become equal, the comparator 6 outputs a correction end signal E9, the relay RY is activated, and the input to the amplifier 5b is cut off. Thereafter, the track adjustment machine performs adjustment work within the circular curve, and then performs adjustment work on the downward slope of the transition curve in the same manner.

In this case, the selection switch 8a is switched to the downward slope side. In the figure, R is a fixed resistor or variable resistor for adjusting input impedance. As is clear from the above description, the transition curve correction device of the present invention can correct the drift by simply setting the maximum cant amount, transition curve length, trajectory correction function, etc. Signals are input in a stepless manner, and the transition curve is automatically corrected.

Therefore, it is possible to correct the transition curve with high accuracy and efficiency, without causing variations in finish that would otherwise occur due to the conventional step-by-step process.

[Brief explanation of drawings]

FIG. 1 is a wiring diagram of a transition curve correction device according to an embodiment of the present invention, and FIG. 2 is a diagram showing output voltage characteristics of each function generating circuit of the trajectory correction function generator. 1...Travel distance detector, 2...Transitional curve length setting device, 3...Trajectory correction function setting device, 4a
...First voltage dividing circuit, 4b... Second voltage dividing circuit, 5... Operational amplifier, 6...
・Comparator, 11... Correction amount detector, 4...
...Cant amount setting device.

Claims (1)

[Scope of Claims] 1. A transition curve correction device for a track straightening machine capable of running on a track, comprising: a running distance detector that integrates the running distance of the track straightening machine and outputs a signal proportional to the running distance; A transition curve length setter that takes the output of the travel distance detector as an input and converts it so that the highest voltage of the output is always a constant value, and a trajectory that corrects the output of the transition curve length setter to a required correction linearity. A correction function setter, a first voltage divider circuit that divides the output of the trajectory correction function setter so that the highest voltage corresponds to the maximum cant amount, and a first voltage divider circuit that divides the output of the trajectory correction function setter so that the maximum voltage corresponds to the maximum cant amount; a cant amount setter having a second voltage division circuit that divides the output so as to produce an output commensurate with the amount, and calculates the output of the first voltage division circuit of the cant amount setter and the output signal of the correction amount detector. an operational amplifier that sends a correction signal to the correction device; and a comparator that compares the output of the first dividing circuit and the output of the second dividing circuit, and outputs a correction end signal to the correction device when the two match. A transition curve correction device for a track straightening machine, characterized by comprising: 2. The first voltage divider circuit and the second voltage divider circuit are comprised of coaxial potentiometers.
A transition curve correction device for a track straightening machine as described in . 3. The trajectory correction function setter is comprised of two or more function generation circuits that output mutually different functions and a selection switch that selects any one of these function generation circuits. Or the transition curve correction device for a track straightening machine according to item 2.