Device for determining the position of the pair of wheels in a rail track and gauge

 

(57) Abstract:

Usage: to determine the position of the pair of wheels in a rail track, measure, track gauge, directly under the rolling stock (locomotive, railcar and so on) and can be used for research kinematic interaction of the rolling stock and the path in the horizontal plane. The inventive device consists of a rigid frame carrying at least three capacitive proximity transducer and fixed to the body of the traction motor or axial gear rolling stock, capacitive plate contactless transducers placed at an angle to the vertical axis of the rail and is included in the diode capacitance bridges, through amplifiers connected to the computer. Two-plate capacitive proximity transducer placed at an angle of 25 - 45o. 1 C.p. f-crystals, 3 ill.

The invention relates to railway transport, namely, devices for determining the position of the pair of wheels in a rail track, measure, track gauge directly under the rolling stock (locomotive, railcar and so on), and can be used for conducting research is known devices allows you to measure the width of the rail track with the help of movable rollers, sliders or deviant wheels located on potenzmitteln motorizing [1]. The disadvantage of this device is the use of the contact measurement methods, reducing movement speed mattesini.

It is also known device for determining the position of the pair of wheels in a rail track [2], adopted for the prototype, consisting of a rigid frame, designed for fastening to buxom pair of wheels and carrying at least three capacitive proximity transducer, two of which are sequentially installed on one rail and the other over the other, and the measuring apparatus is equipped with summerhouse recording unit, the locking lateral displacement of the wheelset, the angular displacement of the pair of wheels in a horizontal plane and gauge.

For the accurate control of the position transducers of the latter are mounted in the slots of the frame by means of bolts. Four capacitive transducer connected to summerhouse recording unit.

The disadvantages of the known devices are, first, attaching the rigid frame to the axle knots is rhenium, secondly, having at least one capacitive plate in each Converter, which leads to significant non-linearity of the signal, and, consequently, a decrease in the accuracy of measurement, third, horizontal placement of the capacitive plates, which leads to significant measurement errors due to changes in capacitance caused by the vibration of the structure and vertical irregularities of the track.

The technical result of the invention is to improve the measurement accuracy by eliminating the influence on the primary measuring signal to interference from takeoff wheel pair in PTC, from vertical displacements of the capacitive plates of the non-linearity of the signal.

This technical result is achieved in that the device for determining the position of the pair of wheels in a rail track and gauge consisting of a rigid frame carrying at least three capacitive proximity of the Converter, each of which includes an electronic bridge with attached two capacitive plates located at the head of the rail and formed with two electric capacity, equipped with a computer, a rigid frame fixed to the body of the traction motor or axial gearbox is glam to its vertical axis, and an electronic bridge made diode-capacitor and through the amplifier connected to the analog input of the computer with the ability to determine the position of the pair of wheels in a rail track and gauge the DC voltage that is proportional to the linear displacement of the capacitive plates in the horizontal plane. Two-plate capacitive proximity transducer placed at an angle of 25 - 45o.

In Fig.1 shows a device, a General view of Fig.2 - structural diagram of the inverter device of Fig.3 - installation of the capacitive plates of the transducer.

Device for determining the position of the pair of wheels in a rail track and track widths (Fig.1,2) consists of a frame 1 comprising two bracket 2, two sidewalls 3, two cross-beams 4, two cross stay 5 and three or four contactless transducer 6 with two capacitive plates 7 on each contactless Converter 6 (Fig.3).

The design of the frame 1 of the device allows adjustment of the position of the capacitive plates 7 on it in three directions: along the axis of the path, across the track axis, and the height adjustment relative to the rail head.

Contactless transducer 6 consists of a generator, vyskocil the La 11. The structure of the device includes a computer 12 (Fig.2).

A generator of high frequency oscillations 8 is assembled into integrated circuits.

Capacitive plates 7 are presented in the form of two plates of foil fiberglass, which are arranged on both sides of the rail head 13 angle = 25 - 45oto the vertical axis of the rail (Fig.3).

On top of the plate 7 is placed contactless transducer 6. When installing the frame 1 of the device on rolling stock (locomotive, railcar and so on) it pregreplace brackets 2 to the housing of the traction motor 1 (or axial gearbox), i.e. to the node relative to which a pair of wheels 15 has minimal movement.

The frame 1 of the device is in the dimensions of the rolling stock and therefore fixed, for example, on the housing of the traction motor 14 continuously.

The device operates as follows.

Before experienced a trip on the frame 1 are three or four contactless transducer 6 and taruruuto by moving the capacitive plates 7 in the transverse grooves 4. After calibration capacitive plates secured. A generator of high frequency oscillations 8 produces castout on the imaging unit 9. Next, the frequency is fed to diode-capacitance bridge 10, which receives signals from the capacitive plates 7 forming with the head rail by two electric capacity. When moving capacitive plate 7 relative to the rail head in the horizontal plane is one capacity grows, other capacity decreases and Vice versa. The location of the capacitive plates 7 at an angle of 25-45oto the vertical axis of the rail makes the device insensitive to vertical movements of the plates. When the movement of rolling stock, for example, with velocity V due to (see Fig. 1) move the pair of wheels 15 of the trolley on the rail 13 is the change of the electric capacitances of the capacitive plates 7 that are included in the diode-capacitance bridge 10. The scatter signal diode capacitance bridge 10 is supplied to the amplifier 11, the output of which, after calibration is formed by a DC voltage proportional to the linear displacement of the capacitive plates contactless transducer 6 in the horizontal plane. These voltage of each Converter is served to the analog input of the computer 12.

Signals with three or four transducers are processed by the following geometrical dependencies:

< / BR>
where S is usharani is - poperechnoe move the left wheel relative to the rail;

- angular displacement in terms of the wheelset;

l1- the distance from the front of the Converter to the axis of the wheelset;

l2- the distance from the rear of the transducers to the axis;

Ha lion.p- lateral displacement on the rail of the left front in the direction of movement of the transducer;

Ha lion.C- lateral displacement on the rail of the left rear in the direction of movement of the transducer;

HAve p- lateral displacement on the rail right front in the direction of movement of the transducer;

HAve C- lateral displacement on the rail right rear in the direction of movement of the transducer;

Sign when H is selected depending on the direction of the sensor.

Sources of information

1. Baluch H. Diagnosis superstructure.-M.: Transport, 1981, S. 149.

2. Auth. St. USSR N 1176199, CL G 01 M 17/00, 1985.

1. Device for determining the position of the pair of wheels in a rail track and gauge consisting of a rigid frame carrying at least three capacitive proximity of the Converter, each of which includes an electronic bridge with attached two amkette, it is equipped with a computer, a rigid frame fixed to the body of the traction motor or axial gear rolling stock, capacitive plates of each transducer is placed on both sides of the rail head at an angle to its vertical axis, and an electronic bridge made diode-capacitor and through the amplifier connected to the analog input of the computer with the ability to determine the position of the pair of wheels in a rail track and gauge the DC voltage that is proportional to the linear displacement of the capacitive plates in the horizontal plane.

2. The device under item 1, characterized in that the plate capacitive proximity transducer placed at an angle to the vertical axis of the rail 25 45o.

 

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