RU1798233C - Method and device for determining the mass of a moving train - Google Patents

Abstract

Use: to determine the mass of a moving train. SUMMARY OF THE INVENTION: the method consists in determining the speed of a train, the magnitude of the thrust in the inclined and control sections, comparing the speeds measured in the inclined and control sections, if they coincide, they determine the difference in the values of the thrust and the difference in their values and the slope of the ramp determines the mass of the train; the device contains four track sensors, a speed meter, a unit for comparing speeds on the horizontal and inclined control sections, two display elements, a key element, a block for fixing the speed constancy on a horizontal and inclined control sections, a counter, a receiver, and a unit for comparing the thrust horizontal and control sections, a thrust force determining unit, a synchronization unit, a computing unit and an execution unit. 2 s.p. f-ly, 2 ill. ate

Description

The invention relates to the field of railway automation, in particular to devices for controlling the speed of a train.

The purpose of the invention is to improve accuracy.

In FIG. 1 shows a path profile and location of point sensors; in FIG. 2 is a block diagram of the proposed device.

In FIG. Figure 1 shows four track sensors 1, 2, 5, b, fracture points of profile 3, train 4, thrust force vector P, the difference of the vectors of the resistance forces of movement Fa-Fi, where FI is the force of resistance to movement from friction and the environment (air and etc.) g F2 - additional resistance from lifting. On the horizontal section, the resistance to the FI movement is less than on the rise (Fi-F2). If we measure the resistance to the movement on the rise, and then subtract from this resistance the resistance to the movement experienced by the train during the movement on the rise, the difference in these resistance will be determined only by the weight of the train and the steepness of the rise. If, the angle of elevation a will be measured in degrees (and not in% o), then due to the similarity of triangles ABC and A1B1C1 (F2-Fi) / sin a.

The above equation is valid only with uniform motion in both sections with the same speed. At

Yu

the absence of equal speeds in the horizontal section, F2 - also on the rise.

In FIG. 2 is a block diagram of a device that includes a path sensor 7; to the output of which, through the speed meter 8, one input of the unit 9 for comparing speeds on the horizontal and inclined sections is connected, to the outputs of which are connected an indication element 10, a key element 11, a block 12 for fixing the constant speed in the horizontal and inclined control sections, to another output of the block 9 connected counter 13, to the input of which the output of the receiver 14 is connected, and to the output-block 15 comparing the magnitude of the thrust in the horizontal and control sections, to the other outputs of which are connected the determination unit 16 the strength of the thrust, the synchronization unit 17, and the outputs of the block 12 and two inputs of the computing unit 18, the output of which through the key element 11 is connected to another display element 19 and the executive unit 20 is continuously supplied to the unit 9 with the speed meter 8. In block 9 the constancy of speed during movement along each of the measuring sections is monitored and, in addition, the equality of the speeds of movement when following each of them. If these conditions are met, then information from the computing unit 20 may appear on the indicator 19 and taken into account in the control circuit. The above conditions for the constancy and equality of speeds are not sufficient for outputting information from the computing unit 18. An additional condition is the constant traction in each of the measuring sections. The thrust force is proportional to the total current of the traction motors (determined in block 16). If the conditions of constant speed are met (monitored in block 3) and constant tractive forces (monitored in block 15). then pulses from blocks 9 and 3 come from the output of block 6. These pulses make it possible to compare the speeds in the measuring sections (block 9) and provide two outputs from block 10 (about the traction in the first and second measuring sections). Thanks to the inputs A1 and A2 (from 4 to .6 lines can be activated on each bus A1 and A2), the address of the memory cell that stores the train weight information for this combination of addresses A1 and A2 is determined.

 The computing unit 12 is made in the form of a programmable read-only memory device, previously stitched in such a way that the thrust force in the horizontal section determines the address A1 (ROM) and the thrust force in the second measuring

the portion determining the address A2 (ROM) selects the cell in which the result of the calculation of the equation P (F2-Fi) / sln a is written.

As mentioned above, the value of a is known in advance (the second measuring section can only be on a certain rise). It should be specially noted that the firmware of the storage device is carried out only for

specific driving speeds (e.g. 60 km / h). This requirement follows from the fact that at different speeds of motion different resistance to movement FL

Therefore, the driver should not

5

0

only maintain a constant, but also a specific set speed (e.g. 60 km / h).

Claims (2)

1. The method of determining the mass of propulsion state trains, in which they measure the speed of the train and determine the magnitude of the thrust on the horizontal control section of the track, using which they calculate the mass, the elongation of 5 and so that, in order to increasing accuracy when the train moves along a track with a variable profile, the train speed is additionally measured and the thrust force is determined on an inclined control section, 0 continuously compare the speed of the train, measured in the horizontal control section, with the speed of the train, measured in the inclined section, and if they coincide, determine the difference 5 thrust forces determined on horizontal inclined sections of the path, and mass according to the formula . (b-FQ sin a 0 where Fr is the thrust force on a horizontal section, paths; F2 - thrust force on an inclined section of the path; and - the slope of the inclined section of the path. 2. Device for determining the mass of a moving train, comprising a train speed meter in the control sections, a unit for determining the magnitude of the thrust 0 and the computational unit, moreover, in order to increase accuracy when the train moves along a track with a variable profile, it is equipped with track sensors installed at the beginning and end of each control section and installed on locomotive by a locomotive receiver, counter, speed comparison unit on horizontal and inclined control sections, comparison unit 5 thrust values on horizontal and inclined sections, a unit for fixing the constancy of speed and thrust on control sections, a synchronization block, a key element and an indication element, one of which is connected to the first output of the speed comparison unit on horizontal and inclined control sections, and another - to the output of the key element, the control input of which is connected to the second input of the speed comparison unit on the horizontal and inclined control sections, and the information input - with the output of the computing unit and whose inputs are connected to outputs of the first comparison value block tractive effort to control the horizontal and oblique sections, the second output and the first input of which is connected respectively, to the first input and the first output of the unit for fixing the constant speed and thrust in the control section, the second input to the output of the determination unit thrust force, the third input is to the output of the synchronization unit, and the fourth input is to one of the outputs of the counter, the input of which is connected to the output of the locomotive receiver, and the other output is to the first input of the speed comparison unit on the horizontal and inclined control sections, the second input which is connected to the output of the train speed meter, the third input - with the output of the synchronization unit, and the fourth input and the third output, respectively, with the second output and the second input of the unit for fixing the constant speed and thrust in the control sections. ; - g Compiled by I. Abramova Editor A. Pavlovsk Tehred M. Morgenthal Corrector M. Petrova Order 745 Mintage Subscription VNIIIPI of the State Committee for Inventions and Discover at the USSR State Committee for Science and Technology 113035, Moscow, Zh-35, Rauska nab., 4/5 Fi g: g