DD156278A1 - CIRCUIT ARRANGEMENT FOR MONITORING PHOTOELECTRIC CONTROL SYSTEMS - Google Patents

Abstract

The invention relates to a circuit arrangement for monitoring photoelectric control systems, in particular on high-speed fast stranding machines. By the invention, the high cost of the said control systems should be reduced. The inventive task provides a circuit arrangement that avoids the expensive components and the high cost with reliable function. The solution to the problem is to place all the outputs of the light barriers both at an AND gate and parallel to an OR gate. The signals passing through the two gates are coupled with an additional signal, so that a constantly high level signals the normal state. Deviations from this, if they exceed a certain time value, lead to the shutdown and deceleration of the stranding machine.

Description

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Title of the invention

Circuit arrangement for monitoring foto electrical control systems

Field of application of the invention .

The invention relates to a circuit arrangement for monitoring photoelectric control systems, in particular on high-speed stranding machines, the control systems constantly monitor the position of the coil frame and the photocells themselves and signals the same deviationso

Characteristic of the known technical solutions

Creels of Schnellversilmaschinen are easily rotatably mounted in the axis of rotation of the stranding machine »They remain due to their low center of gravity in their normal position and deviate from this only when the Lagerrei-. exercise becomes greater than the retention force. If this occurs, it is necessary to bring the stranding machine as quickly as possible to a halt _o why is it necessary to constantly monitor the situation of the creel _o The first monitoring systems or shut-off devices v / aren arranged on the creel switch contacts when tipping In the case of the coil frame, the drive circuit is interrupted and the aggregate brakes are applied. ₀ These internal contact systems have a considerable technical disadvantage, which is that the power line takes place via slip rings. To avoid signal transmission by means of slip rings, one has gone over to the

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Coil frame to be monitored by light barrier systems · DD-PS Wr ₀ 105 4-78 such a system is described, the per coil frame consists of two outside the stranding arranged light sources of various types whose * jam directed rays form an angle to each other and, by the window openings of the Yerseilrotors going, direct or reflected are directed to Potoempfangero The pulses occurring during rotation of the stranding rotor are fed to an electronic counter, which emits a signal for switching off the machine in case of failure of a pulse train.

In DD-PS No. ₀ 55 246 Although a light barrier system with only one light barrier per coil frame is described, but this 'system works without self-monitoring <,' In addition, the system shown there is not in every case · reliable ο The light barrier system according to DD PS 105 478 is quite reliable, but quite right on v / end. How to use two photocells for each creel ₀ Added to this are costly counters and modules for self-monitoring.

Object of the invention

The aim of the invention is to reduce the costs for the intended for coil frame monitoring Lichtsehrankensystern for the same or increased security

Presentation of the essence of the invention

The object to be achieved by the invention is to provide a circuit arrangement for monitoring photoelectric control systems in particular s.schnelllaufenden stranding machines, which is easy to build on and reliable, the circuit complexity for 'a number of light barrier systems not much higher is the cost of a photoelectric system "

The invention solves the problem by a circuit arrangement in which the outputs of any number of photocells are connected simultaneously to the inputs of an AND gate and an OR gate and the output of this OR gate via an inverter and another OR gate with the output of the former AND gate is connected, wherein the output of the latter OR gate via a further AND gate, a timer and a self-holding loop forming AND and OR gate with a relay for switching off the drive circuit and to actuate the Brake is connected, while the second input of the second AND gate is connected to the output of an equivalence gate, · whose one input connected to the first-mentioned OR gate and the second input to a rotor of the stranding machine or the bracket contactless scanning sensor is _o

Furthermore, the invention provides that is replaced with a synchronously driven generator in tubular and non-iron Schnellversilmaschinen the contactless scanning encoder, on the one hand electrically connected to the input of the equivalent gate and parallel via a delay element to the second AND gate and further in parallel with the light barriers is

 The invention further belongs to the fact that the charging time constant of the delay element is much greater than the discharge time constant.

It is part of the essence of the invention that instead of the stranding rotor, the transmission shaft is provided as a signal generator for the non-contact scanning sensor,

embodiment

The invention will be explained in more detail with reference to the exemplary embodiments illustrated in the drawing:

Fig ₀ 1 a circuit arrangement for Schnellverseilmaschinen with tubular! Rotor or with bracket

FIG. 2 shows a circuit arrangement for tubular high-speed stranding machines. FIG.

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In the circuit arrangement according to FIG. 1, all the outputs .of the light barriers 1 required in accordance with the number of coil frames are connected to the AND gate 2 and parallel to the OR gate 3. The AND gate 2 is on the output side with the input of the OR gate 6, which in turn is connected to the AND gate 7 _o via the timer 8, and gate 9 and OR gate 10, the connection goes to the relay 11 ₀ between AND gate 9 and OR gate 10 is a latching loop formed «, the Oder-

The gate 10 is furthermore connected to the acknowledgment element 14. The OR gate 3 is connected on the output side to an equivalence gate 5 and to an inverter 4. The latter is connected on the output side to the input of the OR gate 6. The inverter 5 is in turn connected on the output side the

5.gang of the AND gate 7 and the input side connected to a donor If the creel (not shown) in its normal position, the rays of the light barriers through the window of Verseilrotors 13 directly or indirectly via a belonging to the light barrier system reflector for

0 Receive receiver ₀ At the output of all arranged on. The stranding light barriers 1 high signals, so that at the output of the AND gate 2 also a high signal 'appears, via the OR gate 6 to the AND gate. 7 Thus, at the output of the AND gate 7, a high signal was obtained.

3 , the output of the equivalence gate 5 must output a high signal. This is always the case if the inputs of the gate 5 have identical levels. ₀ Since high signal appears via the OR gate 3 , the signal of the contact

  loose encoders 12 also have high levels. Depending on the type of encoder 12 here is the negated or ungated. The contactless encoder 12 is intended to scan the openings in the stranding tube. As a result of the wire guides on the stranding tube 13, the sensor 12 is arranged on the front side and scans the stranded tube openings via equivalent segments. If a light barrier 1 fails such that the output is low. Signal gives off, though rays are on. meet the receiver, so

, receives the relay 11 via the AND gate 2 and the downstream gates 6, 7j 8 »9» 10 a switching pulse. The flow circuit for the stranding machine drive is interrupted

äf) and · Ai «brakes put into action ν

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If the beams of the light barriers 1 are interrupted by the stranding tube 13, ie by its window webs or by the brackets of the wire guide, low signal appears at the output of the gates 2, 3 since the transmitter 12 at the same moment also outputs a low signal. arises at the output of the equivalence gate 5 high level. About 'the inverter 4 passes via the OR gate 6 high signal to the second input of the AND gate 7 <> At the first input is from the equivalent gate 5 coming high signal to _o the Eelais 11 thus receives no switching pulse · The circuit arrangement shown in FIG. 2 differs essentially from the circuit arrangement shown in FIG _e 1 only in that the encoder 12 is replaced by a generator 15, .dem a delay element 16 is connected downstream _o The generator 15 assumes the function of the encoder 12 and also switches the photocells 1 on and off ο The generator 15 is monitored by the delay element 16, in which the charging time constant is much greater than the discharge time constant ₀ The output of the delay element 16 is fed to the negated input of the AND gate, Disturbances of the photocells 1 such that when the beam is interrupted at the output high level is maintained, lead in simple Lic to prevent the stranding machine from being switched off, d. ho an impermissible deflection of the coil frame is not registered ,, '

The present circuit registers these jumps over gates 3 »5 ° About gates 7» 8, 9> 10 and Ee-Iajj3 11 will cause disconnection of stranding machine drive and collapse of brakes The timer 8 (gate) suppresses undesirable switching tips, gates 9.and gates form a self-holding loop _o If a short high signal is given to the input of the acknowledgment element 14, ζ "über · via a" error acknowledgment "button, the high signal passes via gate 10 to the relay 11. The latter triggers the Brake and unlocks, the stranding machine drive ₀ However, when the signal coming from the timer 8 input of the gate 9 low signal, then falls off via gate 9> 10 from the Eelais and remains

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if the high signal returns, it is switched off until the error is acknowledged at acknowledgment element _o

Claims (4)

-7- 22S893 invention claim 1β Circuit arrangement for monitoring photoelectric control systems, in particular for high-speed stranding with the control systems constantly monitoring the position of the coil frames and signaling deviations thereof, characterized in that the outputs of the photocells (1) monitoring the coil frames coincide with the inputs of an AND gate (2) and an OR gate (3). are electrically connected and the output of the OR gate (3) via an inverter (4) and another OR gate (6) to an output of the AND gate (2) is connected, wherein the "output of the OR gate ( 6) via an AND gate (7) a timer (8) and via the self-holding loop forming and gate (9) and OR gate (10) to a relay (110 is connected, while the second input of the AND gate (7) is connected to the output of an equivalence gate (5) whose one input connected to the OR gate (3) and the second input connected to the Verseilrotor (13) or its bracket contactless scanning Ge.ber (12) is ο 2 «circuit arrangement according to item 1, characterized in that in the case of tubular and non-iron Schnellversilmaschinen the contactless scanning sensor (12) by a generator (15) is replaced, on the one hand with the input of the A'quivalenz-gate (5) and in parallel via a Delay element (16) with the AND gate (7) and further connected in parallel with the light barriers (1) is ₀ 3 · circuit arrangement according to item 1, characterized in that the Aufb.de ze it constant 'of the delay element (16) substantially larger than the Ent charge.s ze it constant is _o 4, circuit arrangement according to Fig. 1, characterized in that instead of the stranding rotor (13), the transmission shaft is provided as a signal generator for the encoder (12).