SU1390657A1 - Controller output channel - Google Patents

Description

(21} 4112353 / 24-07

(22) 08/27/86

(46) 04.23.88. Bul Number 15

(71) Volga Association for the production of cars

them. 50th anniversary of the USSR

(72) N.N.Gorunov, I.F.Zhmievsky and V.I.Sudakov

(53) 621.318.3-5 (088.8)

(56X Nezhdanov V.T., Nezhdanov I.V. Low Voltage Apparatuses, TsINTIELEKTROPROM, 1961, vol.11, p. 111-116.

Catalog ST51 firm Siemens, FR, 1981, p.7.

(54) OUTPUT CHANNEL OF CONTROL DEVICE

(57). The invention relates to energy conversion devices and is intended for use in systems. control of technological equipment equipped with actuators that change their position under the action of non-polar pulses. The purpose of the invention is to reduce power consumption and increase reliability. This is achieved by installing a differentiating circuit 2 at the input of the device, which reduces the control process in it to a pulsed one, in which electric power is consumed only at the time of the passage of pulses. The actuator (s) 9 is made in the form of an electromagnetic mechanism with two fixed positions of the core, which is achieved with the help of hinged relative to the housing and main housing, in the sleeves, as well as through continuous testing diagnostics. The output channel consists of the output module 1 and IM 9. The module 1 of the output contains a differentiating circuit 2, a pulse width former 3, a key 4, a protection element 7 and a diagnostic unit containing an output normalizer 5 and an equivalence element 6, at the output of which a fault signal is generated , and IM 9 consists of a body, an electromagnetic coil, a core and springs in bushings, hinged relative to the body and a core. 4 il.

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The invention relates to energy conversion devices and is intended for use in process equipment control systems equipped with executive devices, changing their position under the action of non-polar impulses.

The purpose of the invention is to reduce power consumption and increase reliability.

FIG. J is a block diagram of the output channel of the control unit; figure 2 - actuator, section; in FIG. 3, a npsi measure of the implementation of an element of equivalence, a state diagram; 4 shows time diagrams of the output signals of the elements of the output channel of the control device.

The output channel of the control unit contains an output module 1 consisting of a differentiating circuit 2, a pulse width generator 3, a diagnostics block key 4, containing an input normalizer 5 and an equivalence element 6, and a protection element 7. An output mechanism 9 consisting of a housing 10, 11, a core 2, springs 13 in the limiting bushings 14 and hinges 15 is connected to the output of the output module 1 of the output via a communication line 8.

The differentiating circuit 2 is installed at the input of the output module 1 so that the input of the differentiating circuit 2 is also the input of the output module 1, and its output is connected to the input of the pulse width generator 3, the output of which is connected to the key 4, the input of the differentiating circuit 2 is connected to the first the input of the equivalence element 6, to the second input of which the output of the normalizer 5 is connected, and the input of the latter is connected to the output of the module 1 of the output and through the protection element 7 with the output of Yuyuch 4,

The key 4 serves to switch the supply voltage (and „„) to the actuator 9 by the command of the control signals at the input of the output module 1.

Input normalizer 5 serves to match and "- ,. with the input element 6 equivalence,

The output canap control device works as follows.

When a control signal arrives at the input of the module J output differential

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The circulating circuit 2 generates a pulse that triggers the pulse width generator 3, which in turn produces a pulse with the duration necessary to transfer the actuator 9 from one fixed position to another. Regardless of what duration the signal arrives at the input of the module J of the transducer, the pulse width former 3 outputs pulses of a constant duration sufficient to transfer the inertia actuator itself to a new state. The only condition that must be met is that the pause between the two input signals (signals applied to the module input) must exceed the pulse duration at the output of the imaging unit 3 (figure 4).

Next, the pulse from the imaging unit 3 is supplied to the key 4 and, from its output, is transmitted through the protection element 7 via the communication line 8 to the coil 1J of the actuator 9 (Fig. 2). In the coil 11, an electromagnetic field arises, under the action of which the korkJ2 begins to move (is drawn into the coil and) and passes an unstable neutral position, approximately 2/3 of the working stroke. The springs 13 are compressed in the sleeves J4, which exclude their bending, and rotate relative to the hinges 15. The further movement of the corpus 12 is carried out due to the turned and unclamping springs 13 until it is set in a new position at the opposite the original coil edge P. The spring 13 fixes the measles 12 in the working position.

At. When the control signal to the input of the output module 1 is discontinued, the differentiating circuit 2 generates a reverse polarity pulse, which in turn creates in the body 3 pulse durations and then in the output key 4 a new pulse that returns the measur 12 of the actuator 9 to initial position. I

The operation of the actuator 9 when exposed to pulses of the same polarity is no different from work when exposed to pulses of different polarity, since it has no elements that react to the direction of the current, for example constant

therefore, the second mechanism 9 is transferred to a new position with each new current pulse, like all similar electromagnetic devices such as relays, electromagnets, etc.

The proposed output channel of the device is designed in such a way that the control process in it is reduced to a pulsed one, in which electric power is required by the device only at the moment of passing the pulses, and in the time interval between the on and off pulses it is not required.

In order to increase the reliability of the output channel and the accuracy of information about the operation of the electromagnetic device, a diagnostic unit is connected parallel to key A, which contains an input normalizer 5 and an equivalence element 6, at the output of which a signal is generated that a fault is present. Testing the operability of the output channel elements of the control unit is carried out both in the absence of a control signal at the input of the output module 1, and in the presence of it (Fig. 4).

In the absence of a control signal at the input of the output module 1, the presence of a supply voltage (Up) and the operability of the communication line 8 and the JJ coil of the actuator 9 are checked. In this case, the current flows through the power supply circuit 4 ,,,, - input normalizer 5 - a series-connected circuit of elements 8 and 9 - a ground - power source npoTe canne current at the input of the normalizer 5 causes the appearance of a signal of a logical unit at its output. The signal of the logical unit from the normalizer 5 and the signal of the logical nud from the input of module 1 are fed to the inputs of the equivalent element 6 and form at its output a signal of the absence of fault O.

If there is a malfunction

The power supply or at least one of the elements 8 or 1, the current path from the power source through the normalizer 5 is broken, and the second input of the equivalence element 6 from the output of the normalizer 5 receives a logical O signal. This signal and a logical O signal at the first input element 6 equals

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that came from the input of the output module 1, form at the output of the element 6 a fault signal - logical J.

If there is a control signal at the input of the module 1 of the year, the operability of the differentiating circuit 2, the pulse width former 3 and the key 4 with the protection element 7 is checked. In this case, the key 4 shunts the input of the normalizer 5, the output of which is a signal corresponding to the logical O, arriving at the second input of the element 6 of equivalence. This signal, together with the logical 1 signal arriving at the first input of element 6 from the input of the output module 1, generates at the output of element 6 a signal that is not -1 failure - logical O.

If at least one of the elements 2–4 or 7 is faulty, the key 4 does not shunt the input of the normalizer 5 and at its output a logical 1 signal appears, which together with the logical J signal from the input of the output module 1 generates at the output of the equivalence element 6 faults - logical J.

Thus, diagnostics of the output channel of the control unit proceeds continuously and allows localization of the location of the fault finding, and the signal is given only at the moment of the occurrence of a fault of any element.

The impulse mode of operation of the output channel of the control device and the application of an electromagnetic device with two fixed, core-free, core positions in it allows to reduce power consumption, since it is consumed only at the moment of passage of pulses, to simplify CONST-.

Operation, since one output device requires one output module (in the well-known, two output modules per output actuator), it is necessary to provide continuous diagnostics of health and localization of device fault finding, and also to control several actuators along one line connection, using, for example, a stepping electromagnetic mechanism or a diode signal distribution, which increases

durability and higher reliability of the output channel of the control device.

Claims (1)

Invention Formula The output channel of the control unit, supporting an operating mechanism with fixed working positions and an output module, comprising a key element and a diagnostic unit, characterized in that, in order to reduce power consumption and increase reliability, a series-connected differential circuit and a shaper are inserted into the specified output module pulses in the unit diag uu uu lu Fa G. 2 five The input normalizer and the equivalence element are entered, the output of the pulse width generator is connected to the key input, the differentiating circuit input is connected to the first input of the equivalence element and the connection point is connected to the input of the module, the second input of the equalizer element J is connected to the normalizer output, the input of which is connected to output of the output module and with the actuator, which is used as an electromagnetic mechanism, and springs are used to fix its working positions They are hinged relative to the body and core of the electromagnetic mechanism. .l h FIG.