SU737575A2 - Apparatus for measuring the output of dragline excavator - Google Patents

Description

I

The invention relates to the field of automatic control and accounting of the operation of excavatorsdraglines used in the conduct of open pit mining.

According to the main author. St. No. 634232, a device for measuring excavatordragline operation is known, comprising an output unit, a fixing unit for an area of space, a logic unit, associated units for measuring the angle of rotation of the platform and the loading amount of the bucket, sensors for loading the bucket, length of the traction cayate, angle of rotation of the platform, connected to the corresponding blocks, in which the block of fixation of the area of space and the output block are connected with the block of measurement of the load of the bucket, and the sensor of the load of the bucket is connected with the block of fixation of the space. The bucket load measurement unit contains two analog-to-discrete converters connected by outputs through circuits I to the inputs of the corresponding counting circuit modes, a trigger whose output is connected to the first input of the first counting circuit, and its output is connected in series a connected device, a time delay element, a trigger and an AND circuit, a reversible counting circuit connected via a deshfrator to the AND input of a circuit, while the corresponding input of a reverse counting circuit connected to the input of the circuit I. The bucket loading sensor contains a summat and all chains connected to it, each of which contains a series-connected static component separation unit

to motor full current and scaling element (1J.

However, in a series of excavation cycles, this situation is observed: at the end of the bucket filling process, the excavator operator should make an alternative decision — either to proceed with the next iteration of the excavation cycle (transfer the filled bucket to the heap), or repeat the filling operation. Known usgs {do not allow the driver

20 1 be a reasonable decision in this situation. Guiding in this case with approximate calculations it is not possible, since it is necessary to predict a pair of pairs of 3 meters of a cycle:) and to calculate the possible increments of excavator productivity. at the predicted coefficient of filling the bucket when re-digging operation. The purpose of the invention is to improve the well-known yctpoflcTBa, which, in order to improve the accuracy of control, is provided with blocks for calculating possible performance increments, measuring the bucket load factor and predicting the length of the excavation cycle elements, while the input of the bucket load measurement unit is connected to the output of the bucket load measurement unit, and the output is connected to the inputs of the output unit and the computing unit. There is a large performance increment connected by the outputs to the output of the 1st unit and the prediction unit of the duration of the excavation elements, the inputs of which are connected to the outputs of the logic unit. Analysis of a representative sample of experimental data on the length of the excavation cycle elements with actual bucket filling coefficients allows us to conclude that in a series of excavation cycles, the excavator’s instantaneous performance can be improved if the comparison of alternatives at the moment of bucket detachment from the slab after the operation of the excavator is completed. Indeed, at the time of the end of the bucket filling, the excavator operator always has at least two alternatives: either proceed with the lifting operation of the loaded bucket and turn the excavator platform to the unloading side, or repeat the scooping operation in order to reach the bucket filling factor. If the following designations are used: the time when the bucket is closed at the first digging, s; time the time the bucket moves to the face for re-scooping, s; the time of the i-th operation of the rotation of the platform with a loaded bucket, unloading and reverse rotation of the platform with an empty bucket, with; A further increase (or decrease) in excavator performance is made by the ratio AQ-100 & Q% Q. Qj-Qb is the instantaneous performance of an excavator with a bucket filling factor K for single digging; - nominal load. bucket; T. the excavator's instantaneous performance with double scoop filling coefficient; 2 Calculation of AQ% values by using chroned 1frame of industrial conditions received by 3111-10 / 60 for calculating zi57 From the data of the table it follows that if you have information about the actual K value and when predicting Ki value, you can make an informed decision on the choice of the subsequent process operation. From the data in the table it can be seen that D Q% can take on values in a wide range: from 34.9% (at K 0.5, K5 0.9) to –19.0% (at, 65 g PS. 1 / k | 0, 70). Obviously, a reasonable choice of alternative can lead to a substantial increase in the instantaneous performance of the excavator. FIG. 1 shows a block diagram of a device for measuring the operation of a dredging line excavator; in fig. 2 is a functional block diagram for calculating a possible performance increment; in fig. 3 is a functional block diagram of the prediction of the duration of the excavation elements Shchkla. Device for measuring the work of a dragline excavator contains a bucket loading sensor 1, interconnected 2 bucket loading measurement measurements and a space fixing unit 3, a longitudinal rope sensor 4 connected to block 3, a platform angle measurement unit 5, a sensor 6 angle of rotation of the platform; 9 connected to block 5, output block 7 associated with block 2, logical block 8, connected to blocks 2, 5 and 7. The device also includes block 9 for predicting the duration of the excavation cycle Element 1B1, block 10 for calculating the possible performance increment, bucket load factor measurement unit 11, which is connected to blocks 2, 7 and 10, block 9 being associated with blocks S and 10, and block 10 connected to block 7. Block 10 calculating a possible performance increment contains multipliers 11-18, dividing 19, 20, 21 and a summation of 22 and 23 elements. One element entries. 11, 12 and 13 are connected to each other in parallel, and their outputs are connected to the inputs of elements 14, 16, respectively. The second input of element 14 is connected to the output of a separating element 19. The second inputs of elements 15 and 16 are connected to the output of divider element 20. The output of element 14 is connected to one input of summed elements 22 and 23, the other inputs of which are connected to the outputs of elements 15 and 16. The outputs of elements 22 and 23 are connected to one input of elements 17 and 18, the other inputs of which are connected to the output of element 21. Block 9 prediction of the duration of elements qi la ekskava1shi comprises pulse shapers 24 and 25 are connected to the outputs of flip-flops, respectively 26 and 27, commuting 28-31 integrirunLtsie 32-35, 36-39 and summiruyupdae multiplier 40, 41 and 42 elements. The outputs of the elements 28-31 are connected to the corresponding inputs of the integrating elements 32-35. The outputs of elements 32 and 33 are connected to the inputs of summing element 36, and the outputs of elements 34 and 35 are connected to the inputs of summing element 37. The output of element 36 is connected through element 40 to the inputs of elements 38.39 and 42. The output of element 41 is connected to the input 3neMeHta 38. The outputs of the elements 38 and 42 are connected to the corresponding inputs of the element 39. The device operates as follows. On circuit 43, bucket loading sensor 1 receives a signal proportional to the total current of the engine core of the bucket throttle mechanism, and circuit 44 receives a similar signal from the engine of the bucket lifting mechanism. From the output of block I through circuit 45, a signal proportional to the difference in the magnitudes of the static component currents of the motors of the lifting mechanisms and bucket thrust enters block 2, is measured, and the output through circuit 46 produces a signal proportional to the weight of the loaded bucket. The block of fixation of the region of space provides the formation of the signal of the beginning of the weighing of the bucket in the process of its: movement along any possible trajectory of movement. The bucket position signals in space and the direction of its movement are generated by sensors 4 and 1. Block 5 provides measurement of the angle of rotation of the platform, measuring the output signal of sensor 6. Logic unit 8 connected via chains 47 and 48 to the control stations of the main drives of the excavator and on circuit 46 with block 2, forwards the control signals that ensure the operation of blocks 5 and 9 in a certain sequence. Block 11, measuring 1 of the load factor of the bucket, gives the value of the load factor K. In the i-TOM excavation cycle of the for34-p. where P; 7 loaded bucket in i-toM excavation cycle; PU - rated loading bucket. A signal proportional to K enters the output block 7, where it is indicated, and into block 10. Block 9 according to the values of the run time tj and the duration of the turn of the platform with the loaded bucket predicts their values (the signals come in chains 49 and 50 from block 8 ) under the condition of re-performing the bucket filling operation t, m41HI nn-l) hh, -nph-Hn npi and return the values of the duration of the excavation cycle with one-time () and two-fold digging TI non, (5), + H;. + 0 , 7, (6) where 0.7 tj, is the time for the transfer of the skin to its original position during repeated scooping. According to TI, Tj, K j, the block 10 calculates (according to formula 1) the possible otnosttelsh6 increments of the instantaneous performance of the excavator at the moment of bucket detachment from behind the first after the first chip with different values of Kf, for example, starting from, 7 and ending 9. The results predict performance increments are output to output unit 7, using which the driver makes an informed decision about the feasibility of re-filling the bucket. . . . , , Block 10 of determining the possible increment of the performance of an excavator works as follows. Signals corresponding to the values of K, TI and Tj are received at the block inputs 51.52 and 53. Elements I, 12, 13 provide for the multiplication of the corresponding: their input: ONE signals and at their outputs form the signals of their own K, He; UBbivi2 0 QH; |, 0.9 Q. Elements 19 and 20 form signals Ug, | ,, j5 ,,; ) Then, at the outputs of elements 14, 15, and 16, IT O-QH is formed; At t1, t, s, and output itf% i- Elements 22 and 23 calculate the possible absolute values of the performance increment for different values of xK 5 a ... O, E; Ue, 5 -K -K Qp Element 2L ensure -BYKhZZ It forms a signal Ugj ,,., / O Elements 17 and 18 form the relative values of the possible increments produced by the laser at a given higher value / OLOnU QA D) & 17. (0.9QH) (O.QH .. ..QV) output 18 to 8 The signals Ug, j, j, (, Ugyjj, g arrive at block 7 through the chains 54, 55 and are displayed, for example, in digital form. Block 9 predicting the duration of the elements of the excavation works in the following way .. The inputs corresponding to the duration of tp, pr are received at the inputs of the circuits 49, 50 of the block. , 25 switch triggers 26 and 27 and through the corresponding switching elements arrive at moves of elements 32-35. Let the initial state of elements be such that on elements 32 and 34 signals, proportional to the duration t ,,, cops 33 and 35, are formed, signals proportional to the duration t |,, J (y. Then at the outputs, elements 36 and 31, signals ayhzb "are formed (right (right)), and on the inputs of elements 40, 41 and 42 signals are wi, x4o 0.5 (VH-tp ,,.), OFF4 05 npi V J & b4G. Then at the outputs of the elements 38 and 39, signals are formed corresponding to the | t values, Tj, Tj U8blX e 5 ((oil + tnpi tnp (,) l, 9ххг9 (Jplpi: p (.l) .5ilp, t, .5 {t,; vt ,,, JP. These signals, through chains 53 and 52, are received at block 10, where they are used in determining possible changes in performance in the event of a refill of the bucket. Fore, Mula of the Invention A device for measuring the operation of an excavator radio line according to ed. St. No. 634232, characterized in that, in order to improve the control accuracy, it is equipped with blocks for calculating possible performance increments, measuring the bucket loading coefficient and predicting the duration of the excavation cycle elements, while the input of the bucket load measurement unit is connected to the output of the bucket loading measurement unit, and the output is connected to the inputs of the output unit and the 14L1 unit. The calculation of the possible performance increment, which is connected to the outputs with the output unit and the prediction block NOSTA zhskavatsii cycle elements, whose inputs are connected to outputs of the logic block.

73757510

Sources of information taken into account during the examination 1. USSR author's certificate N 634232. cl. G 05 13/00, 1976 (prototype).

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Claims (1)

The device of the day measuring the operation of a dragline excavator St. N '634232, characterized in that, in order to improve the accuracy of control, it is equipped with blocks for calculating the possible increment of productivity, measuring the load factor of the bucket and predicting the duration of the elements of the excavation cycle, while the input of the measuring unit of the loading coefficient of the bucket is connected to the output of the measuring unit of the loading quantity of the bucket , and the output is connected to the inputs of the output unit and the unit for calculating the possible performance increment, connected 737575 by 10 outputs with the output unit and the prediction unit elements of the excavation cycle, the inputs of which are connected to the outputs of the logical unit.