SU1553838A1 - Apparatus for checking the level of product in hopper - Google Patents

Abstract

The invention relates to measuring the volumes of containers and can be used in various fields as a product level sensor in a hopper. The device allows to increase the reliability of operation due to simplification. When a signal is received from the sensor at 5 product feed points, the pulse counter 7 pulses in succession to form a series of pulses, the number of which is equal to the number of units of product that can be made from the portion of the product that entered the bunker. The pulses through the element OR 6 are added to the contents of the reversible counter 3. In addition, they through the element I-NE 11 are fed to the control input of the reversible counter 3, setting its mode of operation (addition or subtraction). When another sensor is triggered, 5 product feed points when a portion of the product is consumed, one is subtracted from the contents of the reversing counter 3. If the level in the bunker reaches the value monitored by the corresponding level 1 sensor, the signal goes to correction unit 2, the output of which forms a code corresponding to this level. Using the OR 4 element, the reversible counter 3 is set to the code recording mode and the code at the output of the correction block 2 is recorded in the reversible counter 3. 1 Il.

Description

The invention relates to a technique for measuring volumes, namely, devices for monitoring the level of a product in a silo.

The purpose of the invention is to increase the reliability of operation by simplifying the device.

The drawing shows the block diagram of the device for controlling the level of the product in the bunker.

The device for monitoring the level of the product in the bunker contains sensors 1 of the product level, connected via correction blocks 2 to integrator 3, the output of which is the output of the device, the first element OR A and sensors 5 moments of air flow. In addition, the device for controlling the level of the product in the bunker contains a second element OR 6, a pulse generator 7, a pulse counter 8, a parallel code sensor 9, the first

and the second elements AND-NOT 10 and 11, the element 12 and the first and second elements are NOT 13 and 14. Correction blocks 2 are made in the form of key elements 15 connected by groups of inputs, and integrator 3 is made in the form of a reversible counter. At the same time, the first element OR k is connected by inputs to the outputs of sensors 1 of the product level and the output to the installation input of the reversible counter 3, whose information inputs are connected to the outputs of groups of key elements of the correction unit 2, and the counting input is connected to the output of the second element OR 6. The second element OR b is connected by one input to the interconnected output of one sensor 5 product delivery moments and the first input of the second element I-HE 11, connected by an output to the control input of the reversing counter 3, and connected We force the input through the first element NOT 13 to another input of the second element OR 6, the first output of the counter 8 pulses and through the second element NO to the first input of the first element AND-NOT 10. The first element AND-NOT 10 is connected by other inputs through the unit 9 of the parallel code to the remaining outputs of the counter 8 pulses, and the output to the first input of the element And 12, connected by the second input to the output of the generator 7 pulses, the third input - with the output of the second element AND-NOT 11, C3 output - C

ten

sixteen

20

,

25

5538384

the input of the counter 8 pulses connected by the installation input to the output of another sensor 5 moments of the product.

The device works as follows.

When a signal is received from one of the sensors 5 product delivery moments, a pulse counter 8 is turned on, which at its output generates in series such a number of pulses as specified by the setting unit 9 of a parallel code. The number of these pulses corresponds to the number of units of production that can be made from a portion of the product. In the absence of a signal from the other sensor 5, the product delivery moments from the output of the NAND 11 element to the corresponding input of the And 12 element receive a single signal, when there is a pulse sequence at the output of the pulse counter 8. At the same time, the signal at the output of the NAND 11 element specifies the mode (addition or subtraction) of the operation of the reversible counter 3.

Thus, the contents of the reversing counter 3 corresponds to the number of units of product that can be made from the product contained in the bunker. To eliminate errors, the code in the reversible counter 3 is corrected when the product reaches the specified levels in the bunker. For this purpose, level 1 sensors are installed in the bunker, the signals from which through the OR 4 element arrive at the reversing input. Record the parallel code of the reversible counter 3 and simultaneously to the corresponding correction blocks 2.

The pulses from the generator 7 pulses through the element And 12 arrive at the counting input of the pulse counter in the case if at the output of the elements AND-NO 10 and 11 there is a single signal.

The operation of one of the sensors 5 points of product delivery leads to zeroing of the counter 8 pulses, which ensures the mismatch of the code at its outputs with the setpoint code 9 of the parallel code. The output of the element AND-NOT 10 permits the passage of pulses from a generator of 7 pulses to the counting input of the counter 8 pulses until its content is equal to the number of units of production, which

thirty

35

40

45

50

55

can be made from the product contained in the portion that entered the bunker. At the same time, the code at the output of the pulse counter 8 coincides with the code of the reference 9 of the parallel code and at the output of the NAND element 10 a zero signal is generated that prohibits further passage of the pulses from the generator 7 of pulses to the input of the pulse counter 8.

In the event that the sensor of 5 product feed points triggers when it is discharged from the bunker, depending on the state of the first output of the pulse counter 7, the product output is taken into account as follows. Let on the first output of the counter 8 pulses - units. At the output of the element NOT 13 - the zero level of the signal, and at the output of the element AND-NOT 11 - single. Thus, the unit is summed with the contents of the reversible counter 3.

Let on the first output of the counter 8 pulses be zero. At the output of the element NOT 13 - one, and at the output of the element AND-NOT 11 - zero. Thus, the unit is subtracted from the contents of the reversible counter 3. As long as there is a signal from the sensor of product delivery moments, there is no pulse sequence at the output of the pulse counter 8.

Claims (1)

Invention Formula A device for monitoring the level of the product in the bunker, containing the product level sensors connected through the correction units to the integrator, the output of which is the output of the device, the first element OR, and the sensors of the product delivery moments, that is five 0 So that, in order to increase the reliability of control by simplifying the device, the second OR element, a pulse generator, a pulse counter, a parallel code setting device, the first and second AND-NOT elements, the AND element, the first and second elements are NOT, and Correction blocks are made in the form of key elements connected by inputs of groups, the integrator is designed as a reversible counter, the first OR element is connected by inputs to the outputs of the product level sensors, and the output to the installation input of the reversing counter, inf The input inputs of which are connected to the outputs of groups of key elements of the correction blocks, and the counting input is connected to the output of the second OR element connected by one input to the interconnected output of one sensor of product delivery moments and the first 5 input of the second NAND element connected by output control input of the reversible counter and connected by another input through the first element NOT to another input of the second element OR, to the first output of the pulse counter and through the second element NOT to the first input of the first element ENT equipment connected by other inputs through a parallel code setting device to the remaining outputs of the pulse counter, and output to the first input of the AND element connected by the second input to the output of the pulse generator, the third input to the output of the second AND-NOT element, and the output from the input of a pulse counter connected by a setup input to the output of another sensor of product delivery moments. 0 five