SU407776A1 - DEVICE FOR AUTOMATIC ACCOUNT MOBILE UNITS - Google Patents

Description

one

The invention relates to automation and can be applied for counting pig-iron ladles and bowls in the metallurgical industry. It is possible to use the invention for counting and other mobile units in railway transport, having their permanent base.

A device for automatic counting of mobile units (trolleys) is known, which contains two sensors installed on the path, a trigger, a logic circuit and an interdicter, a reversible counter, and a pulse output unit when power is applied and operates on the principle of issuing counting pulses proportional to the number of trolleys, if the base of the trolley coincides with the base distance of the sensors.

However, such a device does not preclude the issuance of false information in the event of a small variation in the bases of the trolleys relative to the base distance of the sensors, since the bases of the trolley wheels and sensors may not coincide. The possibility of the occurrence of an error is not excluded and when performing maneuvers within the base distance of the sensors, for example, the trolley starts to move in the forward direction, both wheels of the trolley run over sensors, a coincidence occurs and the trolley stops at the sensors: counts the moving unit. If the trolley is forced to move in the opposite direction and, when the second wheel moves out of the sensor, stop, and then send the trolley forward, a coincidence will occur again, and the circuit will issue a counting pulse to the subtraction bus, the counter will subtract this unit. As a result, the trolley is unrecorded.

If the movement of the trolley is started from the opposite direction and the same maneuvers are carried out, then the result is the same error.

The purpose of the invention is to increase reliability

and eliminating the likelihood of giving false information when maneuvers within the basic distance of the sensors, when the iron buckets and bowls move in the forward and backward directions and in the case of non-simultaneous departure of the wheels of the cars after they coincide from the zone of sensitivity of the sensors. For this, two amplifiers, two comparison circuits, a delay circuit, a key and a digital indicator, are introduced into the proposed device.

Moreover, the sensors are connected via amplifiers to the corresponding inhibit circuits and to a coincidence circuit, the inputs of which are connected to the inputs of the comparison circuit, and the output of the comparison circuits is connected via a delay circuit to

one of the key inputs, the other input of which is connected to the input of the circuit via a serially connected trigger and another comparison circuit with the corresponding prohibition schemes and a reversible counter, the output of which is connected to a digital indicator; in addition, both prohibition schemes for connecting uni1 with key outputs.

Such an activation of the output circuit: counting pulses, proportional to the number of pig-iron ladles or bowls, does not occur when the movable units do not coincide with the base distance of the sensors, but after they coincide, when the second wheel of the car appears in the sensing range of the second sensor ( sensor to the second).

The introduction of this principle of counting in the present invention allows to eliminate the occurrence of false information during the movement of pig-iron ladles and cups when maneuvering in the forward and reverse directions, as a result, the reliability of the counting device is increased.

The use of a delay circuit in the device makes it possible to exclude the issuance of false information with a small variation in the bases of the cast iron ladles and cups (within the sensitivity zone of the sensors) relative to the base distance of the sensors.

The drawing shows a block diagram of the proposed device.

The device contains sensors 1 and 2 attached to the rail at the center distance of the wheels of the cast iron ladles or cups, the outputs of which are connected to the inputs of amplifiers 3 and 4. The outputs of the latter are connected to two inputs of comparison logic 5 and match the bis for the first input of the inhibit logic 7 and 8, having three entrances and one exit each.

The device has a delay circuit 9, the input of which is connected to the output of the comparison circuit 5, and the output is connected to the input of the key 10. The output of the coincidence circuit is also connected to the input of the key 8. The output of the key 8 is connected to the second input of the prohibition circuits 7 and 8 and the input of the trigger 11, and the output of the trigger Y is connected to the third input of the prohibition circuits. The outputs of the inhibit circuits 7 and 8 are connected to the input of the comparison logic 12 and to the input of the reversible counter 13. The comparison circuit 12 is connected to the trigger input, and the output of the reversible counter 13 to the digital indicator 14 input.

The device works as follows.

If the car moves from the sensor side il, this sensor is triggered from the wheel of the first axle of the car, the signal from its output is received at the input of amplifier 3, amplified, rectified, formed and fed to the first input of logic circuits 5, 6 and 7. and 7 are banning.

Then, from the wheels of the first axle of the car, the sensors are triggered: K 2 n at the same time from the wheels of the vtoosi - sensor 1. Signals from sensors 1 n 2

arrive at the input of amplifier circuits 3 and 4, and from their outputs - to the inputs of logic circuits 5, 6, and l2. The permission signal from the circuit "And 6 is fed to the input of the key 8. It is triggered

and outputs signals to the second input of the banning circuits 7 to 8 and to the input of the coincidence trigger M.

The coincidence trigger 11 is transferred and prepares the third input of the inhibit circuits 7 and 8. The signal from the output of the comparison circuit 5 enters the delay circuit 9, causing it to work and thus keep the key 8 in the open state. In the actuated state, the delay circuit will be as long as the first and second wheels of the car are in the sensing range of both sensors. When the wheels leave the sensitivity zone, the delay circuit 9 stops producing a signal, and the key 8 does not reset, and the signal from its output prepares the second inputs of the inhibitor circuits 7 and 8.

Upon further advancement of the car from the wheel of the second axle of the car, sensor 2 is triggered, the signal from it through amplifier 3 arrives at the first input of the inhibit circuit 7: all

the three inputs of the inhibit circuit 7 are under a negative potential; from the output of the circuit 7, the counting pulse arrives at the addition bus of the il3 reversible counter. A unit is displayed on the digital display. The signal from the output of the circuit 7 through the comparison circuit 12 also enters the trigger-M, transferring it to the initial state. As a result, the circuit is prepared for further wagon counting.

When the car moves from the sensor 2 side, the operation of the circuit occurs similarly to the movement of the car from the sensor side, but when the second wheel of the car axle hits the sensor 1, the unit of the rolling unit is subtracted

composition, and in the work involved the amplifier 4, the prohibition scheme 9, the logic comparison circuit 12, the trigger M and the counter il3. A reversible counter subtracts. Thus, when moving cars in

in the forward direction, counting pulses, proportional to the number of cars, arrive on the addition bus of counter 13, when the cars move in the opposite direction, on the subtraction bus, and then on the digital indicator 14.

Subject invention

A device for automatically counting mobile units, comprising two sensors,

a trigger connected through a inhibit circuit with a reversible counter, and a coincidence circuit, characterized in that, in order to increase the reliability of the device, two amplifiers, two comparison circuits,

the delay circuit, the key and the digital indicator, the sensors through amplifiers are connected to the corresponding inhibit circuits and to the coincidence circuit, the inputs of which are connected to the inputs of the comparison circuit, and the output of the circuits

Comparison connected via delay circuit

to one K, T5KHODOV key, the other input of which is connected to the input of the circuit through a serially connected trigger and another comparison circuit with the corresponding prohibition schemes and a reversible counter, the output of which is connected to a digital indicator, in addition, both prohibition schemes are connected to the key outputs.