SU1174775A1 - Apparatus for automatic monitoring of weight of material in hoppers - Google Patents

Abstract

DEVICE OF AUTOMATIC CONTROL WEIGHT in the hopper, comprising reversible counters, load cells onto the discharge conveyor, the load cell feed conveyor connected to the counting input of the zero register, whose output is connected to the registers hoppers sequentially connected through keys, control inputs of which are connected with the dates. position of the dumping cart, sensor for moving the loading conveyor belt, connected to the shift inputs of the registers, output triggers rs, whose direct outputs are connected through an OR-NOT element to an input, an AND element, the other two inputs of which are connected respectively to a pulse generator and control unit, characterized in that, in order to increase its reliability by simplifying the hardware implementation, introduced an additional reversible counter, two OR two-entry elements for each bunker; , an additional element AND and a multi-node OR element, and the subtracting input of each reversible counter is connected via the two-input element OR to the output of the weighing sensor 20-fold of the load conveyor and with the output of the EI element AND connected to the summing input of the additional reversible (L counter, and summation). each reversible counter through another two-input element OR is connected to the output of the corresponding register key and to the output of the additional AND element connected with the subtracting input m of an additional reversible counter, the direct outputs of which are 1 h through a multi-input element OR are connected to the first input of an additional element AND, the second input of the SL of which is connected to the pulse generator, the third inverse input is connected to the output of the element OR NOT, and the output of each reversible counter, ka - with the installation input into 1 of the corresponding trigger.

Description

The invention relates to a weighing equipment, in particular, devices for determining the weight of a material in bins without directly weighing them. The purpose of the invention is to increase the reliability of the device by simplifying the hardware implementation. The drawing shows a block diagram of the proposed device. The device contains a weighing sensor I for loading conveyor, sensor 2 for moving the belt beyond the loading conveyor, registers 3, sensors for 4 positions of the dumping bed, keys 5, weighing sensors 6 for unloading conveyors, reversible counters 7 whose number corresponds to the number of controlled bunkers . The subtractive input of each reversing counter is connected to the corresponding weighing sensor through the corresponding two-input element SHSh 8 connected to the output output of the I-9 element connected to the summing input of the reversing counter 10, the summing input of each reversible counter 7 through the corresponding two-input element OR 11 is connected to corresponding key 5 and with the output of the element 12 connected to the subtractive input of the reversible counter 10, the output of the reverse transfer of each reversible counter 7 is connected to the H input of the installation in 1 s of the corresponding trigger 13. The first inputs of the elements AND 9 AND 12 are connected respectively to the control unit 14 and through the multiple input element OR 15 to the outputs of the reversible counter 10 second. their inputs are combined and connected to the pulse generator 16, and the third inputs are also combined and connected to the output of the element OR-NOT {7, whose inputs are connected to the direct outputs of the flip-flops 13 connected to the output buses 18, with the third input of the And 12 element made inverse. The device works as follows. . When the material enters the loading conveyor, the weighing sensor 1 generates pulses that arrive at the counting input of the zero register 3, where it is stored for a time equal to the period of the impulses received at the shift inputs of the registers 3 from the tape movement sensor 2 of the loading conveyor. When the conveyor belt is moved by a given amount, the sensor 2 generates a pulse, which shifts the weight pulses of all the registers 3 by one unit discharge “. Thus, the weight pulses are stored in the registers 3, and as the material and the drop carriage move, they either move along the registers 3 or arrive at the summing input of the reversing counter 7 of the corresponding bunker. Switching registers 3 occurs at the transition of the dumping car from one bunker to the load. following in the direction of motion. The subtractive inputs of the reversible counters 7 through the elements of CMM 8 receive pulses from the load sensors 6, controlled by the amount of material discharged from the bunkers - As a result, each of the reversing counters 7 contains information I.and o, the amount of material located in each of the bins. In this case, the reversible counter 10 and all the triggers 13 are in the zero state in the source state, the output buses 18 have zero signals, and the control unit 14 causes the zero signal that prohibits the passage of pulses from the generator 16 to the summing input of the reversible counter 10. The automatic search for the address of the bunker with the least amount of material begins with the appearance of a single signal from the control unit 14, which retains its value until the end of the address search cycle. This signal permits the passage of pulses from a generator of 16 pulses through element 9 to summing input of control counter 10 and elements 8 to the subtractive inputs of reversible counters 7. Reversing counter 7, in which the minimum number A was recorded before the minimum number was searched ; cleared before others. As a result, (A + I) -M impulse.

arrived at the input of the counter 7, -, the output trigger 13 is entered on the reverse transfer bus corresponding to this counter.

 At the same time, at the output of the element OR-NE 17, a potential of zero appears, by the second through the third inputs, the operation of the AND 9 element is prohibited and the operation of the AND 12 element at the third input of the AND element 12 is also made inverse. At the first input of the And 12 element there is already a single signal, since the control counter 10 contains the number Aj + 1, which is different from zero, and, therefore, at least one of the inputs of the OR 15 element is present. The single signal,.

The control counter 10 is transferred to the subtraction mode, and the counters 7. to the addition mode.

After installing the control counter 10 in O and accordingly restoring in all reversible counters 7 the number АJ + 1 subtracted from all reversing counters 7 when searching for 0 {the minimum number, the output signal at the exit of the SHSh 15 unit signal disappears, which leads to locking the And 12 element The search cycle for the minimum number is over. In this case, a single signal on the output bus 18 of the i-ro trigger 13 signals the minimum amount of material in the i-M bunker.

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Claims (1)

AUTOMATIC WEIGHT CONTROL DEVICE FOR MATERIAL IN BUNKERS, containing reversible counters, load cells on discharge conveyors, load cell load conveyor connected to a zero register count input, the output of which is connected to the bunker registers connected in series with the keys, the control inputs of which are connected to the position inputs of a dumping cart, a conveyor belt moving sensor connected to the shift inputs of the registers, output triggers, direct the outputs of which through the OR-HE element are connected to the input of the And element, the other two inputs of which are connected respectively to the pulse generator and the control unit, characterized in that, in order to increase its reliability by simplifying the hardware implementation, an additional reverse a counter, two two-input OR elements for each hopper, an additional AND element and a multi-code OR element, and subtracting the input of each reversing counter through a two-input OR element is connected to the output of the corresponding sensor of the corresponding load conveyor and with the output of the And element associated with the summing input of the additional reversible counter, and the summing input of each reversing counter through another two-input OR element is connected to the output of the corresponding register key and to the output of the additional And element associated with the subtracting input of the additional a reverse counter, the direct outputs of which through a multi-input element OR are connected to the first input of an additional element AND, the second input of which is connected to the pulse generator, the third inverse input is connected to the output of the OR-NOT element, and the output of each reverse counter,; ka - to the setting input to 1 of the corresponding trigger. 1 1174775