RU1816317C - Device for weighting railroad vehicles - Google Patents

Abstract

Usage: weighing equipment for weighing freight traffic carried by rail. SUMMARY OF THE INVENTION: the system comprises 3 load cells (1.2.3), three weight detectors (4.5.6). 1 two-channel conversion unit (7), consisting of 2 matching stages (11,12), 2 analog-to-digital converters (13,14) and 2 linearizers (15,16), 1 wagon separation scheme (8), consisting consisting of 3 signal conditioners, 3 counters, 1 delay circuit and 2 AND circuits, 1 processing and recording unit (9) and 1 power supply (10). 2-15-11-13-15-9, 5-8-9, 3-6-12-14-16-9. 6-8-9. 1-4-8-9. 2 s.p. f-ly, 3 ill.

Description

, p / p p p p p p g. .

EZ.

U

Jss

and u

U U LT

The invention relates to a weight measuring technique and can be used for weighing freight traffic carried by rail with the simultaneous calculation of the number of wagons in a train.

The invention improves the reliability of systems for weighing moving units of rail vehicles by using a simple axle separation algorithm, which allows the use of simpler electronic circuits, and at the same time expands functionality by simultaneously providing the ability to control the distribution of cargo in each carriage the phenomenon of unevenly loaded wagons, which in turn helps prevent accidents caused by exceeding the permissible load on one of the wagon trolleys with a total load on both trolleys not exceeding the maximum allowable.

In FIG. 1 is a general block diagram of a system for weighing moving units of a rail vehicle; Figure 2 is a diagram illustrating the separation of cars; Fig. 3 is a block diagram of a system in an embodiment using an additional pair of force measuring sensors.

The system for weighing moving units of a rail transport comprises three load cells 1,2,3, three weight detectors 4,5,6, a two-channel conversion unit 7, a car dividing circuit 8, a processing and recording unit 9, a power supply 10.

The conversion unit 7 contains two matching stages 11, 12, two known digital converters 13, 14 and two linearizers 15. 16,

The wagon separation circuit contains three signal conditioners 17,18,19, three counters 20,21,22, a delay circuit 23 and two AND circuits 24,25.

In the embodiment of Fig. 3, the system further comprises two load cells 26.27, with weight detectors 28.29, a conversion unit 30 similar to block 7.

Matching stages 11,12 are necessary for matching the output signals from the detectors 5,6 with the required input level of the analog-to-digital converters 13.14. Linearizers 15.16 provide linearity of the function at its output, which allows the use of force sensors with almost any nonlinearity of the output signal.

The first load cell 1 is arranged on the movement side of the weighed trains.

If it is possible to move the BOB, an additional force sensor (not shown) is installed on both sides of the sensors 2 and 3 (26, 27) symmetrically to the sensor 1. This sensor is connected together with the sensor 1 to the signal conditioner 17 via a key (not shown). connecting with the signal driver 17 only the first of the triggered force sensors.

Weighing System

5 units of rail transport works as follows,

Before the passage of the composition, the reset circuit returns the counters 20.21.22 to the initial state.

0 When the first axis of the first car (or locomotive) is hit by a load cell 1, from the last, through a detector 4, an electric pulse is supplied to the input of the signal driver 17, from the output of which the signal about the passage of the first axis to the input of the processing and registration unit 9 and at the input of adding the unit of the first counter 20. Since the distance between the sensor 1 and sensor 2 is greater than the base distance of the trolleys, the number of signals equal to the number of axles in the first carriage of the carriage (i.e., half of the axles of the whole car) until the cart hits the target

5 sensors 2 and 3. Further, the axis of the first carriage will start to run onto load cells 2 and 3, electrical impulses from which, through detectors 5 and 6, will simultaneously arrive at the signal generators.

0 cores 18 AND 19 and to the two-channel conversion unit 7, from the outputs of which electrical signals carrying information about the weight value are received at the corresponding inputs of the processing and registration unit

5 coming to the axis of the car passed through load cells 2 and 3,

The outputs of the signal conditioners 18 and 19 are connected to the AND 25 circuit, which transmits the signal only when signals from the conditioners 18 and 19 are simultaneously driven.

The first signal from the circuit And 25 corresponds

. the moment of passage of the first axis of the car

via sensors 2 and 3. This signal arrives

simultaneously to the inputs of the subtraction of the unit of the first 20 counter, as well as to the input of adding the unit of the second counter 21, Since the sum of the third counter 23 can only be greater than or equal to zero, the signals from the passage of the first truck to its subtraction input

units are not fixed, and it continues to be in the initial state.

When all the axles of the first carriage of the car pass through the target of sensors 2 and 3, the sum of the first counter 20 will be zero. Since the distance between the sensor 1 and the target of sensors 2 and 3 is less than the distance between the internal axes of the first and second carriages of the car, the axes of the second carriage will not pass through the sensor 1 until the axes of the first carriage completely pass through the target of the sensors 2 and 3.

Upon receipt of zero at the counter 20 from its output, an inappropriate input to the processing and registration unit 9 will receive a signal characterizing the passage through the weight measuring gate of sensors 2 and 3 of the first half of the car. And taking into account the signals received by this moment from the conversion unit 7, the value of the weight of the first half of the car will be stored in the memory.

The same signal from the output of the counter 20 is fed to the control input of the three-input circuit And 24 and the delay circuit 23. As a result, the sum of the counter 21 through the three-input circuit And 24 working as a rewrite port is overwritten to the third counter 22. And the delay circuit 23 delays signal for the time necessary for this dubbing and feeds it to the control input of the second counter. 21, bringing it to its original state.

Now, when the axes of the second trolley pass through the weighing gate of sensors 2 and 3, each signal from circuit I 25 will reduce the sum of the third counter 22 by one, after passing the last axis of the second trolley, this sum becomes zero. As a result of this, from the output of the counter 22 to the corresponding input of the processing unit, a signal will be received characterizing the passage through the weighting gate of the second half of the car (i.e. the whole car). The same signal is postulated to the control input of the second counter 21 again, bringing it to its original state (having erased the number of axes of the second carriage calculated by it). The processing and registration unit 9 will fix the weight of the second half of the car. Further, according to the program laid down in it, he sums up the weight of the first and second half of the car, which gives the value of the total weight of the car, and also compares the ratio of the weight of half of the car to control the uniformity of its load.

The indicated procedure will be repeated when the next carriage passes. At this point, all counters will automatically be reset.

After passing through the entire train system, the processing and registration unit 9, which can be a microcomputer, provides information on the number of cars in the train, the weight of each car, the uniformity of its loading and the number of axles.

The signal processing algorithm can be simplified by adding to the system

0 (see FIG. 3) of two additional load cells 26 and 27, with weight detectors 28 and 29, and an additional two-channel conversion unit 30 similar to the conversion unit 7.

5 The gate of sensors 26 and 27 is located at a distance from the sensors 2 and 3 at a distance equal to the base distance of the trolley. In this embodiment of the system, not four-axis, but weight-bearing weighing of four-axle wagons is carried out.

Claims (3)

1. A system for weighing mobile units of a rail transport, comprising a first load cell integrated in one of the rails of the railway track, a second and third load cell integrated in the rails 0 of the railway track, one opposite the other, a conversion unit, a car dividing circuit, a processing and registration unit, and a discharge circuit, characterized in that. the wagon separation scheme was performed in the form of three signal conditioners, three counters, a delay circuit, and two AND circuits, the first of which is made of three-input, and the corresponding inputs of the second are connected to the outputs of the second and third 0 signal conditioners, second output circuit And connected to the subtraction inputs units of the first and third counters and adding the units of the second counter, the control input of which is connected to 5 to the output of the delay circuit, the first, second and third inputs connected respectively to the output of the third counter, the output of the first counter and the output of the reset circuit connected to the control inputs per0. of the first and third counters, the input of adding the unit of the first counter is connected to the output of the first signal conditioner, the parallel outputs of the second counter are connected to the corresponding parallel 5 inputs of the three-input first circuit AND, the control input of which is connected to the output of the first counter, and the parallel outputs to the corresponding parallel inputs the third counter, the outputs of the first signal driver, the first and third counters are connected to the corresponding inputs of the processing and registration unit, with the output of each one of the load cells is connected to the input of the corresponding first, second or third signal conditioner, the conversion unit is made two-channel, each of the channels of which is connected to the output of the corresponding second or third load sensors and is made in the form of series-connected matching cascade, analog-to-digital converter and a linearizer, the output of which is connected to the corresponding input of the processing and registration unit, the distance between the first and second force measuring sensing sensors less distance between the internal axes of the carriage bogies and more the distance between the extreme axes of adjacent cars and the base distance of the trolley. 2. The system according to claim 1, with the fact that it is equipped with a fourth and fifth force sensors built into the rails of the railway track one opposite the other, at a distance from the second and third force sensors, equal to the base distance of the truck, and an additional two-channel converter, each of whose channels is connected to the output of the corresponding fourth or fifth force sensor and the corresponding input of the unit processing and registration. 3. The system according to claims 1 and 1, with the fact that the processing and registration unit is configured to compare the mass of the first and second halves of the car.