SU433347A1 - DEVICE FOR MEASURING THE QUANTITY OF MATERIALS IN DRIVES - Google Patents

Description

one

The invention relates to a measuring technique and can be used in acquiring mining chemistry enterprises in the mining and coal industries to automatically measure the weight of a substance in a hopper (ore pass, bunker, etc.) with scraper loading when devices for direct measurement of weight are not possible - with a large storage depth (for example, 50–1OO m), due to the significant dynamic loads caused by loading.

A device for measuring the amount of a substance in accumulators is known, which contains level sensors and an output device.

The purpose of the invention is to develop an automatic device for measuring the amount of, for example, the weight of a substance in an accumulator, which makes it possible to eliminate subjectivity in measurements.

Information on the amount of the loaded substance, applied by the force sensor on the winch drum shaft, through the program device and the analog-code converter

enters the summation input of the reversible counter, and information about the amount of the unloaded substance supplied by the weighing device, weighing the unloading transport vessels (trolleys), through the second analog-code converter and the scaling device enters the subtraction input of the reversible counter. The number filled in the counter

serves as the amount of substance in the accumulator.

The counter is reset from the zero level sensor, and the number is recorded from the maximum level sensor with a full

filling the drive.

The drawing shows a block diagram of the proposed device.

The device contains a force sensor 1 on the shaft of the winch drum 2, for example, a magnetoelastic sensor, the output of which is connected to the software device 3 defining a path section with a constant friction coefficient and rigidly connected to the drum shaft of the winch 2. You can use a retarding disk as a software device . The output of software device 3 is connected to a smoothing filter 4 designed to smooth out any sensor signal bursts due to random disturbances. The output of the smoothing filter is connected to the analog-code converter 5. The output of the converter 5 is connected to the addition input of the reversing counter 6. The output of the maximum level sensor 7 (for example, the sensor of the IKS relay) is connected to the recording input of the reversible counter. The output of the zero level sensor (sensor of the drive gate, for example, limit switch) 8 is connected to one of the inputs of the coincidence circuit 9, the output of which is connected to the reset input of the counter 6. The output of the weighing device is connected to the input of the analog-code converter 11, the output of which is connected to the input of the electronic time relay 1.2 vt to the scaling device 13. The output of the time relay 12 is connected to the second input of the coincidence circuit 9. The output of the scaling device 13 is connected to the subtraction input of the counter 6. Measurement weight and the substance in the storage unit is made up of the weight of the substance loaded and unloaded from it. Accounting for the weight of the substance to be loaded is as follows. When the scraper bucket enters the path section with a constant ground sweep coefficient, the software device 3 connects the output of the sensor 1 on the winch drum shaft through a smoothing filter 4 to the input of the converter 5. From the output of the converter 5 to the input of the counter 6, a signal corresponding to the weight loaded into the storage substance. The weight of the substance discharged from the accumulator is taken into account by blasting the transport vessels (trolleys) filled with the substance by washing the weighing device 10, the signal from which, proportional to the net weight of the substance unloaded from the accumulator, enters the analog-11 converter input. From the converter 11 output the code corresponding to the weight of the discharged substance enters the input of the mass-stabilizing device 13, from the output of which the input to the subtraction input of the counter 6 receives the code corresponding to the weight of the vigorous substance and in received units. In Masatt the device 13, a control signal of the pulling mechanism is formed. gonetok. In order to eliminate the accumulation of systematic error, the installation of two level sensors 7 and 8 is provided, controlling respectively the complete filling and the absence of power in the drive. When the sensor 7 is triggered, a signal corresponding to the weight of the substance when the accumulator is completely filled arrives at the input of the record of the counter 6. The indication of the absence of a substance in the accumulator is carried out as follows. When the gate of the feeder from the sensor 8 is opened, a zero signal is sent to one of the inputs of the coincidence circuit 9, the second input of which is connected to the time relay contacts of the converter 11 pulse code. In the absence of pulses from the converter 11, the maximum possible interval between the converter signals when there are no pulses the minimum loading capacity of the trolley, from the output of the relay 12, a zero signal arrives at the second input of the matching circuit 9. If the zero signals coincide, the circuit 9 will generate During the reset signal of the counter 6, corresponding to the absence of the substance in the accumulator. Subject of invention A device for measuring the amount of a substance in accumulators, which contains level sensors, an output device, characterized in that, in order to automate the determination of the amount (weight) of a substance and increase the measurement accuracy, it includes a reversible counter, serially connected force sensor on the winch drum shaft , software device, an analog-to-converter converter connected to the summing input of a reversible counter, series-connected load cell sensor vessel, a second analog-code converter and a scaling device, connected to the subtraction input of a reversible counter via a coincidence circuit and a time relay connected between the output of the second converter and the analog input and one input of the coincidence circuit, the second input of which is connected to the zero level accumulator sensor, and the output - with the reset input of the reversible counter, the input for recording the number of which is connected to the output of the maximum level sensor, and the output to the input of the output device.

Output

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6