SU1425277A1 - Method of monitoring and registering operation of power shovel - Google Patents

Abstract

The invention relates to the measurement of operation parameters of an excavator mech-shovel. The purpose of the invention is to increase the accuracy of control and accounting of the excavator while simplifying implementation. The load of the lift motor is measured, the values of the load of the bucket (P.) are determined as it moves along the angular speed of the lift motor and the duration of the platform rotation (TPRV;). The head current of the motor is measured (), the voltage at the additional poles of the lift motor (Ufl J, I). Install min. values of head current (1.cr) and voltage at the additional poles of the motor of the lifting mechanism (Iv.) - The scooping operation is defined as the simultaneous fulfillment of conditions 1c., - the frequency signal UjnjS Ud. (,. 5 with a signal characterizing the rise of the bucket The re-scooping operation is defined as a sequence of carrying out the operations of scooping and lowering the bucket. The transporting operation of the loaded bucket is defined as simultaneous within 3-5 s meeting the conditions, - / 5-P "; b C where C and C are given constants." the excavation cycle is determined by control of the sequence of operations of drawing, transporting a loaded bucket and opening the bottom of the bucket. 2 Cp f-crystals, 7 ill. (L 1 N5 SL ISD

Description

The invention relates to the measurement of the parameters of the work performed by the excavator-mekhlopaty during the open cast mining, in particular to the control and accounting of the parameters of the meklopaty used for loading the rock mass and vehicles.

The purpose of the invention is to increase the accuracy of control and accounting for the operation of an excavator mehlopaty while simplifying the implementation of the method.

The goal is achieved by the fact that in the process of excavation, the core current of the pressure mechanism engine is measured, the angular speed of rotation of the shaft of the engine of the bucket lift mechanism, the direction of rotation of the shaft of the engine of the bucket lift mechanism is controlled, the minimum value of the current of the head engine of the head pressure and tension mechanism is established at the additional poles of the lifting mechanism, characterizing the process of filling the bucket, they control the direction of rotation of the engine shaft of the platform turning mechanism, with This scooping operation is defined as the simultaneous fulfillment of the conditions fsig p

I. n I e-ni G

determine the execution of the transfer by monitoring the sequence of operations of digging and lowering the bucket, measure the duration of the platform rotation, determine the loading of the bucket during its displacement according to the angular velocity of rotation of the shaft of the engine of the bucket lifting mechanism, determine the operation of transporting the loaded bucket after execution scooping operations as simultaneous within 3-5 s conditions

/Tpoe.if with, I PH; with

during the excavation process, the operation of opening the bottom of the bucket is monitored, and the execution of the excavation cycle is determined by controlling the sequence of the excavation operations, transporting the loaded bucket and opening the bottom of the bucket, where Sign is a signal characterizing the lifting of the excavator bucket;

i

,

0

5 0 5 0

five

0 j

 G10v-1

lihcT installed and the actual currents of the main motor circuit of the pressure mechanism;

Unp, and „„; - set and actual voltage at the additional poles of the engine of the bucket lift mechanism; - the duration of the rotation of the platform after the scooping operation;

Pj) 4; - net weight in loaded

ladle; C (settable constants.

The amount of bucket loading is determined during its transportation to the place of unloading after performing the scooping operation and turning the platform left or right for 3-5 seconds by smoothing the current value of the shaft rotation speed of the drive mechanism of the bucket lifting mechanism, then integrating it over 3 from the output value obtained after smoothing and staying on the indicated interval the average value of the integrated value proportional to the load of the bucket.

In addition, in the process of excavation, the total number of scoops produced and scolds on the i-th time unit are calculated, the total number of excavation cycles performed at the same time instant is calculated. In relation to the total number of excavation cycles made to the total number of scoopings and redemptions, preparedness of rock mass for excavation.

Fig. 1 shows a block diagram of a device that implements a method for monitoring and recording the operation of an excavator - mechlopats; figure 2-7 - structural diagrams of the functional blocks of the device.

The method is carried out as follows.

During the excavation process, the magnitude of the voltage at the additional poles of the engine of the bucket lifting mechanism, the current of the crustal circuit of the engine of the pressure mechanism 1 is measured; and speed rotation speed of the shaft of the engine of the bucket lifting mechanism; then the direction of rotation of the engines of the bucket lift mechanism is controlled, and

ten

31425277

The Sign signal is obtained when the engine rotates in a direction that provides bucket lift, and the Sign OK 1 signal is received in the direction of engine rotation that provides lowering of the bucket. The minimum values of the current of the crustal circuit of the engine of the 1ts ufcV head pressure mechanism and the voltage at the additional poles of the lift mechanism engine and „„ n characterizing the process of filling the bucket are set.

In the process of excavation, the direction of rotation of the engine of the platform turning mechanism is controlled: Sign GSH 1 - with the direction of rotation of the engine providing the rotation of the platform to the right, and Sign - when the rotation of the engine is applied, ensuring the rotation of the platform to the left. The scoop operation is then determined.

15

Sign4-1, if sign PK 1ts; i .Uan (jCT

where 1nusg (, 6) 1nn; (0.3-0.6) idg, “th;

(one)

p to

. gd

25. our tr

20

 HOM

installed and rated currents of the engine pressure circuit; the rated and rated (at rated load) voltage at the additional poles of the bucket lift engine.

The execution of the overflow is determined by monitoring the execution of the sequence of operations,. Sign. if fslgn: 4 “l | - rsignOK“ 1.. -, - (2) Then the total number of scoops and scolds performed during the excavation process at the 1st time point is calculated

iiti h

Nj-lL (Sign); +2: (Sign, (3)

Where

t; tt ,,, ct. g

current time;

toe start and end time

shifts

moreover, the i-th time in the shift interval is determined depending on the technological need.

Measure the duration of the rotation of the platform.

POB.A.

(four)

Sign

Sign,

(6)

ten

-.

15

.

the duration of the periods of the right and left turns of the platform;

P1, P2 - the number of periods of the right and left turns of the platform when moving the loaded bucket. The beginning of the period of transporting the loaded bucket is determined.

Sign NT-1, if fsign,. sign

. where Sign, if / C, (8) C, - 3-5 s.

Determine the load amount of the bucket 25.sha in each excavation cycle during the period of transportation of the loaded bucket

g

t .dt

20

(9)

thirty

RIG

K - P,

PC

, de t, t, j, j / Sign HB-1 ,,

Sign if / Sign,

about)

(ten). (eleven)

PC K

 OD

t, t, + (2-3) s;

empty bucket mass; coefficient of proportionality;

40 Sign - in the absence of a signal that ensures the opening of the bottom of the bucket. The operation of carrying the loaded bucket is determined. 45 Sign, if after the scooping operation (Sign) the conditions are met

ГРн; СС21 (13)

1 | T "with".; | WITH,

,

(14)

and

50 where С, (0,3 - 0,6), and Р „om - nominal load of the bucket; Cj 3 - 5 s.

During the excavation process, the bottom opening operation is monitored.

55 buckets: Sign - if there is a signal that ensures the opening of the bottom of the bucket.

The execution of the excavation cycle is determined by monitoring the execution of the sequence of operations of the excavation cycle Sign, Sign TG, Sign OD, i.e. Sign if

(jsign sign sign OD; lj. (15)

i Calculate the total number of excavation cycles performed at the i-th instant

i;

M, (Sign, (16)

de t t; with. t.

1 Determine the current value of the indicator characterizing the preparedness of the rock mass for excavation:

P)

M,

(17)

A device that implements the method with; encloses the electroplating unit 1 - IOK unit 1, the unit 2 controls the execution of one-11th scoop, the unit 3 controls the transport operation of the loaded bucket, the unit 4 measures the Lagrowek bucket, the unit 5 controls the excavation cycle and the output

{) LOK 6.

Sign OK, Sign PC, Ugn, it,;, Sign OD, Sign PP and Sign PP.Outputs are connected to the inputs of block 1

Lok 1, forming galvanically developed signals Sign OK, Sign PC,,,; and Sign OD, are connected to the (1) corresponding inputs of block 2, and its outputs, which form galvanically activated Sign-OD signals, Sign Ш1 k Sign ПЛ, are connected to the inputs of the р block. In addition, the corresponding inputs of blocks 5 and 6 are connected to the circuit that generates the Signal OD signal. The output of block 2, which generates the Sign H and Sign IF signals, is connected to the input of block 6, and its output, which forms the Sign NT signal, is connected to the input of the block 3

The output of block 3, which forms the signal TG, is connected to the corresponding input of block 5, the output of which is connected to the input of block 6. The signal fOr is connected to one input of block 4; , and to another input - the output of block 3, which forms the signal Sign HB. One output of block 4, which forms pulse signals fj, is connected to the corresponding outputs of blocks 2 and 3, and the other of its output, which forms the signal “; It is connected to the corresponding inputs of blocks 3 and 6.

Unit 1 of galvanic isolation (figure 2) contains the input matching

five

0

five

0

five

0

five

0

five

The COP elements 7-13, respectively, through the optocouplers 14-20 are connected to the inputs of the amplifiers-drivers 21-27.

The control unit 2 for the execution of the scooping operation (FIG. 3) contains triggers 28 and 29, threshold elements 30 and 31 and logic elements AND 32 and 33, In this case, the output of trigger 29 is connected to the same input of element AND 32, the outputs of threshold elements 30 and 31 connected to the corresponding inputs of the element And 33, the output of which is connected to the inputs of the trigger 28 and 29.

The control unit 3 for carrying out the operations of transporting the loaded bucket (Fig. 4) contains a reversible counter 34, a counter 35, logic gates AND 36-38, a decoder 39, an element OR

40, adjustable threshold element

41, trigger 42 and switches 43

and 44, the outputs of the counter 34 through a serially connected decoder 39 and a switch 43 are connected to the input of the element 36 and the other outputs of the decoder 39 through the switch 44 to the input of the element 37. Other inputs of the elements 36 and 37 are connected respectively to the control buses + , - reversible counter 34. The outputs of the elements 36 and 37 are connected to the inputs of the element OR 40, the output of which is connected to the inputs of the element 38 and trigger 42. The output of the element 41 is connected to the input of the element 38, the output of which is connected to the counting input of the counter 35. The output of the counter 35 St for the bus reset of the counter.

The bucket load measurement unit 4 (FIG. 5) contains a low-pass filter 45, averaging node 46, i 47 comparator, switching key 48, measuring integrator 49, pulse generator 50 and logic element 51, the filter output 45 through node 46 is connected to one the input of the comparator 47, to another input of which the output of the measuring integrator 49 is connected. The output of the switching key 48 is connected to the input of the measuring integrator 49, and the outputs of the comparator 47 and the generator 50 to the inputs of the And 51 element.

The block 5 for monitoring the execution of the excavation cycle (Fig. 6) is an AND 52 gate with two inputs.

The output unit 6 (Fig.7) contains counters 53-57, decoders 58-62, indicators 63-67 and button 68, the outputs of counters 53-57 through the corresponding decoders 58-62 connected to the inputs of indicators 63-6.7, button 68 - to the reset bus of the counter 56, and the counting inputs account 1ikov 55-57 connected in parallel.

The device works as follows

In the process of excavation, the signals Sign OK, Sign PC, ujn come to the inputs of block 1 (FIG. 1); , i; , Sign ОД, Sign nnHSign raij a to the input of block 4 receives the signal С0 „; , From the output of unit 1 (outputs of elements 21-27, FIG. 2), galvanically developed signals Sign O, Sign PC, Ugi ,; , and Sign OD arrive at the inputs of block 2, the Sign Sign OD arrives in addition to the inputs of blocks 3, 5, and 6, and the Sign PP and Sign PD signals go to the inputs of block 3, In addition, the corresponding inputs of blocks 2 and 3 from the block , 4 signals of the pulse generator f are received. As a result, at the output of block 2 (the output of trigger 29, FIG. 3), the signal Sign ((formula 1) is generated, and at the output of trigger 28, in addition, the signal IF is also signal (formula 2),.

Signals Sign and Sign of the inverter are received in block 6, where they are summed up (counter 53, figs, 7) and displayed (indicator 63, figs, 7) for visual reading, as a result of the output of the element 32 and (fig. 3) form

0

five

0

Chike 57 - recycled hearth mass on an accrual basis.

After the next transport unit has been loaded, the counter 56 is brought to the zero state by pressing the key 68. The counter 55 is brought to the zero state at the moment of unloading the bucket (Sign). At the output of the counter-. 35 of block 3 (FIG. 4), after a signal is received, a signal is formed that characterizes the operation of transporting a loaded bucket .Sign (formulas 13 and 14), which enters block 5, and a signal is generated at the output of element 5 of block 5 (fig. 6) performing the excavation cycle Sign (formula 15), which enters block b, where it is summed (counter 54, fig, 7) and displayed (indicator 64, fig, 7),

Thus, during the excavation process, the device generates the following information: the total number of digs 5 and redevelopment, the total number of excavation cycles performed, the weight of the rock mass in the excavator bucket, the weight of the rock mass plunged into the transport unit and the total amount of rock mass moved during the excavation process. In addition, with respect to relation (17), one can judge the readiness of the rock mass for excavation.

0

35

Claims (3)

Invention Formula 1, The method of controlling and recording the work of an excavator mehlopaty, including A signal characterizes the beginning of the Q measurement of the engine's load for the transportation of the Sign bucket (Formula 4-8), which is fed to the input of the counter 34 (FIG. 4) In block 3, trigger signal 42 generates a signal, the beginning of the weighing of the bucket Sign (formula 11), which is fed to the inputs of elements 48 and 51 of block 4 (FIG. 5), and as a result bucket lift, determination of bucket loading, control of scooping operations, loading of a loaded bucket and excavation cycle, characterized in that, in order to improve the accuracy of control and accounting of work, an engine core current is measured during the excavation process. of the head mechanism, the angular speed of rotation of the shaft of the engine of the bucket lift mechanism, control the direction of rotation of the motor shaft of the mechanism of the lift of the bucket, set the minimum values of the current of the main circuit of the engine of the head mechanism and voltage on the additional poles of the engines of the lifting mechanism, characterizing the process of filling the bucket, controlling rc signal; characterizing the load amount of the net bucket (formulas 9, 10 and 12), the signal P ,,, - is fed to the input of the element 41 of block 3 (FIG. 4) and in addition to block 6 (FIG. 7), where it is summed up (counters 55 -57) and is displayed (indicators 65-67). In the counter 55, the net weight of the bucket is recorded, in the counter 56 - the weight immersed in the transport unit, and in Q the measurement of the engine load of the engine five bucket lifting, determining the load of the bucket, monitoring the execution of scooping operations, transporting the loaded bucket and the excavation cycle, characterized in that, in order to increase the accuracy of control and metering of work, in the process of excavation, the current of the pressure mechanism engine is additionally measured, the angular speed of rotation of the shaft of the engine of the mechanism of raising the bucket, control the direction of rotation of the shaft of the engine of the mechanism of raising of the bucket, set the minimum values of the current of the main circuit of the engine of the mechanism on ora voltage and extra lifting mechanism motor poles characterizing bucket filling process kontropiruyut direction of rotation of the engine shaft rotation mechanism platfor | we, the digging operation is determined as the execution conditions ydnovremennoe I sign  Ii  and AND., st The re-dredging operation is determined by monitoring the sequence of digging operations to lowering the bucket, the duration of the platform rotation is measured, the I loading of the bucket is determined during its movement | by the angular speed of the shaft rotation of the engine of the bucket lifting mechanism, it is determined the operation of transporting the loaded bucket after performing the scoop operation as a one-time within 3-5 s of the conditions of 1. / Tpov; I C | R,., Ci), control in the process of excavation: the operation of opening the bottom of the I bucket, and the execution of the excavation cycle is determined by controlling the sequence of carrying out the scoop operations, transporting the loaded bucket and opening the bottom of the bucket, where Sign is a signal characterizing the lifting of the bucket excavating at the same point in time HI cavalier; installed and actual currents of the engine head pressure mechanism; ten 15 20 25 30 RFP fioe.i -M.I (t ten set and actual voltage at the additional poles of the bucket lift engine; the duration of the rotation of the platform after the scoop operations; net laden weight; С - settable constants. 2, the method according to claim 1, characterized in that the bucket loading amount is determined during transportation from the bottom to the unloading point after the digging and platform rotation operations are performed within 3-5 seconds by integrating for 2-3 seconds The rotational speeds of the drive shaft of the bucket lift mechanism and being in the indicated interval the average value of the integrated quantity proportional to the load of the bucket. 3. The method according to Claim 1, about t. L. And h - y and so that, in order to form information about the working conditions of the excavator, in the process of excavation, the total number of scoopings produced and digs on the i-th moment of time, the total number of cycles produced is calculated And in relation to the total number of excavation cycles performed to the total number of digging and redevelopment, the readiness of the rock mass for excavation is judged. Slfn ok FIG. SLONTT Siffn nol. 52 FIG. 6 FIG. five CCP