SU1582135A1 - Apparatus for determining direction of movement of objects - Google Patents

Abstract

The invention relates to instrumentation technology and can be used in control systems for tracking the direction of motion of objects. The aim of the invention is to increase the reliability of the device by simplifying the circuit. The device contains sensors 1 and 2, elements NOT 3 and 4, triggers 5 and 6, element EXCLUSIVE OR 7, trigger 8, demultiplexer 9 and ensures operability with an object length less and more than the base distance between sensors 1 and 2. 1 Il.

Description

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The invention relates to a measurement and control technique and can be used in control systems for lying behind the direction of motion. objects

The aim of the invention is to increase the reliability of the device by simplifying the circuit.

The drawing shows the structure-JQ and the scheme of the device.

The device contains sensors 1 and 2, elements NOT 3 and 4, triggers 5 and 6, element EXCLUSIVE OR 7, counting trigger 8 and demultiplexer 9 Out of 15 1 in 4.

The device works as follows.

In the initial state, at the output of dates 1 and 2, triggers 5, 6, and 8 there are signals corresponding to the level of logical zero.

Consider the cases where the length of the obek is less than the distance between the sensors,

If there is an object at sensor 1 25, a signal with a logic one level appears at its output, which triggers trigger 5 and confirms the zero state of trigger 6. Therefore, address 01 of the demultiplexer 9 is given address 01, which leads to transmitting the input signal to the device output 01. Thus, at the output of the demultiplexer 9 there is a signal of the counting trigger 8, which was transferred to the unit state from the signal from the EXCLUSIVE OR 7 element and indicates the movement of the object from sensor 1 to sensor 2. When the area further moves between sensors 1 and 2 at the output of trigger 5, the signal of logical zero is turned on, and the state of trigger 6 does not change, and the output buses of the device nullify the presence of a zero at the output of element EXCLUSIVE OR 7 prepares the counting trigger to change its state. When an object moves to sensor 2, a single signal at its output leads to confirming the state of flip-flop 5, the appearance of a signal of a logical unit at the output of the EXCLUSIVE OR 7 element and throwing flip-flop 6 into a single state. In this case, the counting trigger 8 is transferred to the zero state, the output of the device is zero. Further movement of the object results in the appearance of a zero signal from the output.

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sensor 2 and return the circuit to its original state.

When an object moves from sensor 2 to sensor 1, the device works similarly with the only difference that address 10 is generated first, resulting in the appearance of a logical unit at the device output 10, and the address 0 being created does not cause a signal at the device output.

When the length of the object is greater than the distance between the sensors, then, as the object moves from sensor 1 to sensor 2, address 01 is first formed, which results in the appearance of a logical unit at device output 01. When the object is located at both sensors, the generated address 11 causes the device 01 and 10 to zero. Upon further movement of the object at sensor 2, address 10 does not lead to the formation of a single signal at the output 10 of the device, since the input of the demultiplexer 9 is present at this point in time a zero signal. When the object passes sensor 2, the circuit will return to its original state. When an object moves in the opposite direction, the device operates in the same way as the cases discussed above.

Claims (1)

Invention Formula A device for determining the direction of movement of objects, containing two sensors, the outputs of which are connected to the inputs of the first and second elements, respectively, and two triggers, characterized in that, in order to increase reliability by simplifying, the element EXCLUSIVE OR, counting trigger and the demultiplexer, while the outputs of the first and second sensors are connected respectively to the first inputs of the first and second triggers and to the first and second inputs of the EXCLUSIVE OR element, the output of which is connected to the input of the counting terminal ggera whose output is connected to an input demultiplexer having two outputs and the address inputs of the demultiplexer are connected respectively to the outputs of the first and second flip-flops, the second inputs of which are connected respectively to the outputs of the first and second elements does not.