SU1372194A1 - Method of per-wheel weighing of moving objects - Google Patents

Abstract

This invention relates to a weight measuring technique. The purpose of the invention is to increase the accuracy of weighing. Using an analog-to-digital converter (ADC) 7, the signals of strain gauges 5 of load-receiving units 2 and 3 are alternately converted into digital codes. When changing the signals of strain gauges 5 loaded with axes, the zeroed codes are subtracted from the

Description

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processing results on each axis. After hitting the first wheel composition, for example, on the load-receiving unit., The output signal of the load cell 5 increases. At the output of the ADC 7, the digital codes increase corresponding to the load receiving unit 2. By measuring several code values, the processor 11 generates commands. The direction of movement is left, block 2 is the first, and block 3 is the second, which are stored in block 10. Simultaneously, relates to weighing technology and can be used for weighing goods transported by rail.

The aim of the invention is to increase the weighing accuracy.

Fig. I shows a diagram of a device implementing the method; FIG. 2 shows a lifting device, view from above; figure 3-6 - load diagram of the load-bearing blocks when weighing various registered and unregistered objects.

The method of rolling-in moving objects provides for the installation of two load-receiving units 2 and 3 on the railway track I (their installation into concrete primers is shown in figure 1).

Each load-receiving unit is fixed by the strings 4 and relies on the capacitors 5, connected via a key circuit 6 to the analog-to-digital converter (AC 11) 7, through tires 8 connected to a permanent storage device (ROM) 9, a random access memory (RAM) 10, central processor 1 1 and data input / output interface 12, a terminal device 14 (for example, a digital printing machine) is connected to a bus 8 via a registration interface 13, a trip register 15 and a register of 16 leads connected to interface bus 12 each in volume of two units.

In addition, the HI zoom signal is indicated on the first (in the direction of travel) block 2.3; signal h2 for the second

At home, processor 11 begins one of the known algorithms recorded in the persistent storage device 9 to process the codes of the load-receiving unit 2. The processing result is memorized by the unit 10 as the mass of the first left-hand wheel. After the passage of the second bogie of the object, its mass is summed with the previously remembered mass of the first bogie, and the result is transmitted via ccteface 13 to the device 14. 6 Il.

block 2.3; signal B1 departure from the first block 2,3; signal B2 departure from the second block 2,3; NA team Start of summation and CS command End of summation.

The load-receiving units 2 and 3 can be used from the composition of the serial scales 1959 TS-200 V. Dpin blocks 2 and 3 mm, and the beginning of block 2 is shifted relative to the start of block 3 along the railroad axis I by distance mm, which provides for the distinction of the recorded objects ( cars) with an inter-axial distance of 1,800– 1,850 mm and unregistered objects (locomotives) with an inter-axial distance of 2,100-2,200 mm.

The method is carried out as follows.

In the initial state, using the ADC 7, the initial signals of strain gauges 5 of the left and right (in FIG. 2) load receiving units 2 and 3 are alternately converted into digital codes. The indicated digital codes according to the program recorded in ROM 9. entered by processor 11 in RAM 10 and averaged over one of the known programs (e.g., by, counting the average of 16 subsets of the measured code values).

The result of the averaging zero codes is stored in RAM 10 and periodically (for example, I once a minute) is updated.

When changing the signals of strain gauges 5 loaded with the axes of objects, the stored zero codes are subtracted from the results of processing along each axis, so that the results equal to the axial loads are received to sum up and determine the mass of objects.

After the composition has hit the first wheel, for example, on the left (according to FIG. 2) load-receiving unit 2, the output signal of the left (of FIG. 1) load cell 5 increases.

Accordingly, at the output of the A / D converter 7, the digital codes corresponding to the left receiving unit 2 increase as well. Measuring several (for example, five different code values significantly exceed the initial level of the left receiving unit 2, the processor 11 forms commands - left, Block 2 - first, UNIT 3 - second, which are stored in RAM 10.

At the same time, the HI signal is generated, corresponding to the time t

(Fig, 3). Through the interface 12, the HI signal is recorded in the register of 15 routes.

Simultaneously with the run, the processor 11 starts one of the known algorithms recorded in the ROM 9, processing the codes of the left receiving unit 2. The result of the processing is stored in the RAM 10 as the mass of the first left-hand wheel of the movable object.

The processing algorithm provides filtering of digital codes from dynamic interference and can be constructed, for example, by integrating over a time multiple of an integer number of periods of dynamic interference.

Fig. 3 shows the load diagram of blocks 2 and 3 when driving on them any (first or second) trolley of a four-axle object. Since the center distance in the carriage is b 1800 mm, and the distance between the beginnings (ends) of the load-bearing units 2 and 3 L is 1950 mm, at the moment t,. A second drive of the H1 signal is generated by the processor 11, which is supplied via the interface 12 to the input of the register 15 and 8 times a day, which is set to state 2 and through the interface 12 transmits the command HC to the processor eleven,

The NS command is stored in RAM 10. According to this, the results of processing A, A 2 for the left wheel of the first carriage of the object and the results A, n A2p For the right wheel by the time

0

five "

Q, Q

five

meni t, summed up and stored in RAM 10 as the mass of the first carriage M,

In time t with the load-receiving unit 3, the first wheel of the object leaves, processor 11 generates exit signal B2, through interface 12 arrives at the counting input of exit register 16, sets it to state 1, At time t, a second stage exit signal B2 is generated and register 16 is set to state 2, and the CS command is sent to bus 8 via interface 12.

When driving a second carriage, i.e., the third and fourth axes are four-wheel; railroad car, the chart of arrivals and departures (FIG. 3 is completely repeated, since the first and second carts of the object are identical.

After the passage of the second carriage of the object, its mass is summed up with the mass M of the first carriage stored earlier in RAM, and the result is that the mass of cars M through the interface 13 is transmitted to register the terminal device 14,

Similarly, the six-axle car is weighed, the chart of arrivals and departures of the first carriage of which is shown (fig. 4). The processing of the results on the first wheel A is accomplished at time t, at the time t, j the second run HI occurs and the register 15 travels form NA team. At times t and t, the signals of the B2 outputs of the right wheels of the six-axle object from block 3 are formed. Thus, by the time t, (End of summation), the mass of the first carriage of the six-axle object is remembered in RAM 10:

ravng1 mass of all six wheels of the first bogie.

The mass of the Hesy car M M, respectively, is registered by the terminal device 14 after the passage of the second carriage, the chart of the raids and departures of the fourth and fifth. and whose sixth axis revolves completely (Fig. 4).

Fig. 5 shows a diagram of arrivals and departures of an eight-axle carriage, from which it is clear that the NA command is formed at time t), and HI arrivals at t 2 and t for 513

are transferred to the register of 15 arrivals, set it to the state |, but are canceled at the moments, and the t-signals of the arrivals of H2, which (FIG. 1) come through the interface 12, to the dimming input of the register 15,

Similarly, departures B2 at times t,, and t are canceled by signals B1 at times t and tj and only departures B2 that occur at times t and t set the register of 16 departures to state 2, i.e. form a team of cop.

Thus, by the time t, in RAM 10, the mass of the first bogie of the eight-axle car is summed up and stored.

M A, + A ,, - N A ,,

State of emergency

where A and A. - the results of processing

I / I P

for left and right object wheels.

The mass of the eight-axle car M, as well as the mass of other objects weighed, is registered on the basis of the parity principle, i.e. after passing through the cargo receiving blocks 2 and 3 of the second bogie of the object.

Consider the chart of loadings, alternations of raids and departures when driving through cargo reception blocks 2 and 3 of an unregistered object, for example, a locomotive (six-axle).

In this case (Fig. 6) at time t, the load receiving unit 2 also drives the first wheel of the object. The processor 11 generates a hitting signal HI, through the interface 12 sets the register 15 to the state 1. The processing of the results for the first left wheel, starting with at time t. issuing in RAM 10 re- -I

result - mass A of the first left

locomotive wheels.

However, due to the fact that the center distance of locomotives b. 2100-2200 mm, then, following the first arrival of HI, the right wheel of the locomotive hits the load-lifting unit 3 and the formation at the time tj of the signal H2, which cancels the register 15 of arrivals.

Q

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five

five

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Then, at time t, a signal HI is again formed, which again sets the register 15 for the raises to state 1. However, at time t the register 15 is cleared by the signal H2.

Setting register 15 to state 1 and redeeming it is repeated at times t and t.

about 11

Thus, when driving a locomotive on load-bearing blocks 2 and 3, the HI signal twice does not occur, the register of 15 arrivals to state 2 is not established and the NA commands are not generated. In accordance with this, according to the program recorded in ROM 9, the results of processing the masses of the wheels of the locomotive A, A from time t to time 1;

Since the signals of the exits B1 and B2 are formed (Fig. 6), successively alternating, the formation of the CS signal is also excluded.

Claims (1)

Invention Formula The method of mass-weighted moving objects, including the installation of two load receiving blocks on the track, shifted relative to each other, converting the output signal of load receiving blocks into digital codes, filtering digital codes and summing up the processing results, determining the direction of movement of the train, determining the axes of objects on the load receiving blocks, formation of the Registration team after the passage of each even-numbered object's carriage, which is different, in order to increase the weighing accuracy and, the beginning or the end of one of the load-receiving blocks are shifted relative to the naps or the end of the other by a distance greater than the center distance of the objects being registered, but less than the center distance of the unregistered objects, and the processing summation for each trolley of the object begins during the second stage trolleys of the object on the same cargo-receiving unit, and finish at the second second exit. / 7300 1st time 2nd time FIG. g Fig.Z 1os2oszosb 1osZocbPage axis Srig. FIG. five