SU475336A1 - Digital device for automatic control of the movement of a shaft hoist - Google Patents

Description

BROP, adder 2 and block of constant coefficients of the MIC.

The BZL program setting block has the MP input field, the terminals 1, 2 ... n of which are connected to the outputs of the corresponding border number generation switch sections in the BM unit of the BM unit and are connected via jumpers and terminals 1, 2 ... t to the OR cells the entrance of the trigger register TR. At the same time (see Fig. 2), the outputs of the cells are connected through the separation cells OR to the inputs of the cells of the program section length signal forming, the outputs of which through the OR element are connected to the control unit of the control unit and additionally through the delay element of the signal to the reset input of the length counter The counting input of which is connected to the FI pulse generator from the sensor D. This allows the termination signal of the program section to be generated depending on its number and automatically reset the GI counter to its initial state.

To eliminate the error along the way due to wear of the linings and drum deformation, as well as due to the error in manufacturing the sensor of string D, and taking into account the effect of hoisting ropes on the accuracy of vessels stopping at the receiving sites, the BKP program correction unit is included (Figs. 1, 4), consisting of a controlled register P of two-input match schemes "AND, the number of which corresponds to the number of bits / g in binary code equal to the distance from the starting point of the machine to the correction point of the program, where avlivaets track sensor PD. One input of each circuit "AND register P through the lamella switch switches with the power supply bus of the power source, and the second inputs of all circuits" and the same register are connected to a common supply potential control bus from the output of the logic circuit of the control unit CU. The output of each circuit "And the register P (Fig. 4) is connected to the trigger input of the corresponding bit of the counter of the number of sections C2 of the block of scale BM. This means that the output of the I: circuit is connected to the trigger input of the first discharge of counter C2, the output of the IG circuit is connected to the trigger input of the second discharge of the same counter, etc. The counting input of the meter Cd is connected to the control unit of the control unit, and The output of this counter (Fig. 2) includes the coincidence cells ... forming the number of the switching boundary of the program sections and the cell generating the start of operation braking signal, the output of which is also connected to the control unit of the CU.

The input of the control unit of the control unit (Fig. 1) is also connected to the sensor of the vessel loading of the DZS, the track sensor PD of the program correction, the generator of clock pulses of the GTI and the time relay PB, which controls the presence of pulses from the FI generator. The output of the control unit of the control unit is connected to the BZP program setting block, the BROP RAM memory block, the adder 2, the BM scale block, the BKP program correction block, and the working NTR and safety YATL braking unit, as well as the inverter code block

BPKA, the output of which through the power amplifier of the PA is connected to the executive motor ID. The trigger register TR (Fig. 3) is connected via the channels "Control and Reset" to the control unit of the control unit, and the outputs of the register

TP is connected to the converter unit “Code-analogue of BPKA.

According to the signal of the end of loading of the vessel, coming from the sensor of loading of the DZS, the control unit CU sends to the input of the counter

The number of sections C2 of the BM scale unit (Fig. 2) is an impulse, through which a signal is output from the output of the coincidence cell corresponding to the initial part of the program, which is fed to the first of terminals 1,2, ....

The n-type field of the NP of the unit for setting the BZP program (Fig. 3). Depending on the value of this terminal with the terminals, 1,2 ... t at the input of the cells "OR at the output of the previous ones, a binary code of the reference voltage (specifies the effect) is generated, which, through the trigger register TR, by the command" Control coming from the control unit The control unit is fed to the converter unit "Code Log Dialing Code. The TP register is cleared by the control unit of the control unit via the channel "Reset before each rewrite of the reference code. The signal from the output of the converter unit BPKA through the power amplifier UM enters the executive engine

The ID that drives the PM motor and the sensor D associated with its shaft. The output voltage of the sensor D as a series of pulses taken from the FI generator is fed to the LSI speed measurement unit and the BM scale unit. At the same time, the control unit of the control unit monitors the presence of these pulses by means of the time relay PB. In the LSI speed measurement unit, using a well-known circuit and a GESH reference frequency generator, a code of a number proportional to the time interval between two adjacent pulses of the FI generator, i.e., is measured, inversely proportional to the actual speed of the machine on an elementary path segment.

In the block scale BM (Fig. 2) pulses

from the PI generator are fed to the counting

input of the counter of length of a section Ci, at the exit

which match cells are included

in an amount corresponding to the number of program sections with different path lengths. On the one hand, the inputs of these cells receive binary codes of all lengths of sections, on the other, from the output of the separation cells OR position codes of the numbers of program sections.

having the same length, formed at the output of the coincidence cells “I.

Thus, when the number of pulses from the FI generator, corresponding, for example, to the length of the initial (first) program section, arrives at the counting input of the counter Ci, the signal at the end of the section through the OR element goes to the control unit BU in parallel, through the delay element 3, the signal resets the counter Ci to the initial state, preparing it to form the length of the next program section. The delay time of element 3 is determined by the duration of the transient process when performing operations in the LSI speed measurement unit. By the signal "End of section, the control unit of the control unit sends to the adder 2 a command that calculates the actual speed of the lifting machine PM by dividing the constant number code contained in the block of constant BOD coefficients and equal to the distance between adjacent impulses of the FI generator, taking into account the speed scale , by a number proportional to the time interval between these pulses, in the binary counter of the LSI speed measurement unit. The interim results of the calculations are recorded in the BROP RAM memory block, with which the adder S exchanges information on the commands of the control unit of the CU. The code of the computed speed of 1Speed speed is also stored in the block of RAM memory registers. After that, the command of the control unit of the control unit in the adder 2 calculates the mismatch between the program and actual speeds of the elevator PM, and the program speed code is generated in the task block of the BZP program by means of a keypad and trigger register similar to the above setting of the task voltage code and differs from the latter by the value of the force coefficient. The magnitude of the velocity mismatch code with its sign is transmitted by the command of the control unit of the control unit from the RAM register block BROP to the block BPKA, where it is converted into a constant voltage value and algebraically summed with the reference voltage, the code of which comes from the block BZP program, and then, the sum signal through the PA power amplifier is fed to the executive motor ID for testing.

After that, the control unit of the control unit again sends a counting pulse to the counter of the number of sections Cd (Fig. 2) of the BM scale unit, as a result of which the reference voltage code and program speed are generated at the end of the second section of the program, etc. Next the cycle of operation of the device is repeated.

The operation of the control unit of the CU is synchronized by a series of clock pulses. produced by the GTI clock pulse generator. Block BKP works as follows.

Preliminarily, at the input of the circuits coinciding with the register P (Fig. 4), a binary code is dialed through the slats of the switch, corresponding to the distance from the point of movement to the point of correction of the program. Suppose, for example, eD, this distance n of the binary code is equal to "10101, then in the polynomial polynomial. The third and fifth circuits are connected to the switch by means of lamellae. on

which there is a "plus napp zhspl power source SP. Inputs vtopoy. The fourth match patterns " remain stabbed open. At the second entrances of all units connected to the engine block, upoavlotti BU.

the control potential is absent, therefore, the output of the circuits “And signals of the trans-fps t p-gerov bits of the counter Co are also absent.

As soon as lifting SOGU. v the installation site of the FL sensor, the sensor sends a signal to the logging unit of the control unit of the control unit. on the bus connected to the second watches

Coincidence circuits ' s register P. A control potential appears corresponding to ' plus a supply voltage. Thus, at both inputs of those circuits of "Gb. Whose slats switch zamkn you, in this

The moment of time is present “plus nappu nutrition, i.e., sup- ply the same signals. The indicated schemes "Both are opened, and the signals from their outputs are received by Tia. The moves of the corresponding bits of the at least cleared counter of the number of parts of C2, the conversion of these bits into a single state. Consequently, at the correction point of the program, at first, the count of the number of sections is cleared by the command "Reset

from the control unit of the CU, from the binary stake. the corresponding distance (the number of program sections) traveled by the machine, together with the accumulated volume. and then a two-part code is entered into this counter.

corresponding to the true position of the removable vessels, i.e., the program is corrected along the way.

When the lifting vessel approaches the stopping point at the receiving site from the output of the coincidence cell (Fig. 2) in the BM scale unit, the control unit of the CU receives an operating braking signal, which turns on the operating brake actuator via the NDR cell. In the event of an emergency (pulling-up START-up, absence of pulses from the FI mapper), the time relay PB sends a signal to the control unit of the control unit, which activates the safety brake through the ITP cell. 7 PRIQUE AND 3 ABOUT. 1. Digital device for automatic motion control of the lifting machine, containing a vessel loading sensor, a path sensor with a pulse driver, a speed measuring unit, a frequency generator, power amplifiers "Conversion unit" analogue code, control unit with input clock generator, program setting block, program correction block, constant coefficient block, main memory register block, operating and safety signal generation unit braking and power supply sources, characterized in that, in order to improve the accuracy of adjusting the speed of the machine and increase operational reliability, it is equipped with a program correction correction sensor connected to the control unit 20, a time relay connected to the pulse driver, You have a 1ft stroke with a control unit, a speed program length scale unit as a path, connected by its inputs to a pulse shaper, a control unit and a program correction unit, and outputs to a program setting unit Amma and control unit, wherein the correction unit is designed in the form of a coincidence circuit, one input of which are connected via switches to the bus power source, the other - to the logic control unit, and outputs - to the inputs of the scale unit. 2. The device according to claim 1, characterized in that, in order to divide the scale of the length of the control sections and measure the speed of the machine, the scale block is made in the form of two binary counters and two 1 sets of combinational matching and separation circuits, the number of which is proportional to the current switching boundary number section of the program and its length.

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