JPS58213904A - Level detecting apparatus of track correcting machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a level detection device for leveling a rail track.

Generally, on a rail track, the difference in height between the left and right rails on the straight section, that is, the cant value, is set to zero, and where the track is curved, the cant value is set to zero, and where the track is curved, the cant value is set to zero according to the curvature. need to be kept.

The track leveling machine automatically levels the track while running on the rail track, and is equipped with a leveling device, a rail lifting device, and a trackbed tamping device. 〇～The rail lifting device compares the detected level from the level detector and the set level from the level setter.

Track bed tamping gL1it is controlled by +4 to correct deviations in cant value due to drop in track bed ballast, etc.

Conventionally, a pendulum-type level detection bag has been used for this type of track straightening machine, as shown on the left.

The current cant value is detected by measuring the inclination angle of the pendulum caused by the height difference of the right rail, and the detected signal is amplified and used directly for the relay control output of the leveling device, etc. .

However, such conventional level detection devices use a pendulum to detect the inclination angle of the rail, so the pendulum may vibrate due to the direct vibration of the track straightening machine itself due to the vibrations during traveling and tamping. Resulting in. As a result, the angle detection becomes unstable and the accurate cant value of the rail cannot be detected.
The rail track may not be properly aligned, making it dangerous for trains to run, and the vibrations of the pendulum may cause the detection output to fluctuate, causing relays to operate more frequently, reducing their lifespan. It has the disadvantage of being stored away. Therefore, in order to eliminate the negative effects of the vibration of the track alignment machine, the length of the pendulum is increased to prevent it from vibrating slightly, but at the same time, the width of the pendulum also becomes thicker, and it takes time for the pendulum to settle. It takes a long time to detect the rail cant value, which impairs the workability of the track straightening machine.In addition, it is possible to accurately detect the rail cant value without being affected by the vibrations of conventional track straightening machines. As something that can be detected, for example, a level detector is placed at the rear of a track straightening machine that is obsolete from a tamping device that generates less vibration, and a reference bar is placed through the upward rotation axis of this level detector. This reference bar is always held horizontally by the signal from the level detector, and the level detection device uses the so-called indirect reference method, which detects the inclination of the left and right rails from this reference bar via a potentiometer, etc. However, there are drawbacks such as the entire device is complicated, cumulative errors occur due to misalignment of the troughs, and the cost is high.

The present invention has been made with the above points in mind.The present invention employs a direct cant detection method using a pendulum, which has a simple overall configuration. To provide a level detection device for a track straightening machine that can accurately detect the straightness of a rail without being adversely affected by the vibration of a stopper.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings F1.

As shown in FIG. 1, the level detection device for a track straightening machine according to the present invention includes: i; the pendulum-type angle detector l described in I; and an amplifier 2 for amplifying its detection signal; A low-pass filter 3 removes disturbances from the angle detector l from the amplified output signal and extracts only frequency components from 1 to 5 times the response frequency of the rail lifting device, that is, from 1 to 5H2. It consists of an output circuit 4 which amplifies the output of the filter and the settings from the reference setter with a No. 1g operational amplifier, shapes this signal with a waveform shaping circuit, and outputs the output to the relay control circuit.

The operation of the level detecting device for a track straightener according to the present invention constructed as described above will be explained below.6 First, an electric signal corresponding to the inclination of the pendulum is obtained by the angle detector l. In this case, the angle detector 1 detects 4F'-
During crushing, as shown in FIG. 2(a), the pendulum vibrates slightly due to the vibration of the orbit straightening machine itself as described above, so a high frequency component which is a disturbance is included. The output of this angle detector 1 is amplified by the next stage amplifier 2 (Fig. 2(b)).
By passing the low-pass filter 3 through the low-pass filter 3, the medium and high frequency components due to disturbances from the angle detector 1 are filtered out, and the result is a signal as shown in Fig. 2 (C), that is, a rail holding Only frequency components of 1 to 5 times the response frequency of the above device, that is, 1 to 5 ILz, can be obtained. Next, this low-pass filter 3
The output is a reference value setter, operational amplifier, and waveform shaping circuit.

It is sent to the output circuit 4 with a built-in relay control circuit, where the second
As shown in Figure (d), it is compared with a preset reference level L, and when the input reaches this reference level L, an operation command is sent to the relay RY. (See Figure 2(e))
Note that the reference level L preset in the reference value setter of the output circuit 40 is set in accordance with the cant value. The cant value detected by the angle detector 1 is transmitted to the amplifier 2.
, and remove the influence of disturbance with low-pass filter 3.
The operational amplifier of the output circuit 4 compares and amplifies the set value set by the reference value setter, and sends an operation command to the relay RY via the waveform shaping circuit and relay control circuit. As a result, the relay RY is energized and a lamp (not shown) is turned on to perform a level detection display. In addition, in the level detection device for the track straightening machine according to the present invention, instead of driving the relay RY by the output of the output circuit 4, the output is recorded and displayed on the recorder, and the electromagnetic control valve of the hydraulic cylinder of the rail lifting device is Needless to say, it is possible to take appropriate measures such as 6 to stop the rail special operation.

As described above, in the level detecting device for a track straightener according to the present invention, the level detection device for a track straightener according to the present invention is capable of detecting a level difference generated in a detection signal of an angle detector by photographing a track straightener.

The high frequency component is filtered and the response frequency of the rail lifting device is 1
Since only the frequency components of ~5 times, that is, 1 to 5H2, are sent to the output circuit for level detection, the cant detection accuracy is significantly improved. Therefore, the track finish is good, there is no variation in finishing accuracy, and the work efficiency of the track straightening machine is approximately 1.5 to 2 times that of conventional track straightening machines. 'Since no erroneous output is generated in the output circuit due to noise, relays etc. do not malfunction and have a long service life.In addition, the level detection device of the track straightening machine according to the present invention is particularly suitable for It is possible to perform highly accurate level detection using a simple angle detector that directly detects the cant value of It has the excellent advantage of being extremely simple and economical; in the present invention, the level detecting device is not only used in track control machines, but also in bulldozers and power shovels with a leveling ball function. Needless to say, the present invention can be applied to civil engineering construction machinery such as the following.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a level detection device for a track straightener according to an embodiment of the present invention. FIGS. 2(a) to (eJ are diagrams each showing the output waveform of each part in the same embodiment. 1. Angle detector 2. Amplifier 3. Low-pass filter 4. Output circuit RY.・Relay patent applicant
Shibaura Seisaku Co., Ltd./31r Figure 2

Claims (1)

[Claims] An angle detector that detects the inclination of the left and right rails by the inclination of the pendulum, an amplifier that amplifies the detection signal, and a frequency that is 1 to 5 times the response frequency of the rail lifting device from among the output of the amplifier. A low-pass filter extracts only the V frequency component of 5 Hz, the output of this low-pass filter and the setting signal from the reference installation device are operationally amplified, this signal is shaped by a waveform shaping circuit, and this output is ``A level detection device for a track straightening machine consisting of an output circuit that outputs force via a relay control circuit.