SU620022A1 - Flip-flop monitoring device - Google Patents

Description

(54) DEVICE FOR TRIGGER CONTROL

The invention relates to a pulsed and computational technique and can be used to monitor the health of triggers with a counting input used in discrete systems.

A pulse counter is known, with an error monitor, consisting of a controlled counter, a controlling counter, AND, OR elements and signal matching in time. Control over the trigger of the helix is carried out by comparing his work with the work of a known-good counter.

The disadvantage of such a control is the inability to determine the location of the faulty trigger, as well as the long time control of the triggers.

The closest to the technical essence of this invention is with ycTpdIcTBo for controlling triggers, containing the register of liabilities, stevd for checking tl of triggers, own triggers and indicating device, the device input is connected to the shift register input /

Such a device allows the location of a faulty trigger to be determined, however, in some cases, for example, if there are two faulty analogous triggers in parallel groups, the location of the fault is ambiguous. In addition, the lack of a known device is a long Olya control time; in addition, it can control only an even number of the trigger,

The invention of the invention is a reduction in the time of control and an increase in the accuracy of Kcmov's role of triggers.

This is achieved by introducing two groups of h element into the proposed device for controlling triggers, the pulse shaper, the device input is connected to the reset input of the index device, the output of the pulse shaper generator with the first inputs of the pulse AND of the first group, the first output of each The shift register bit is connected to the second input cooiv of the hanging element AND the first group and to the first input of the corresponding element AND the second group, the output of each element AND the first group is connected to the counting input corresponding to guide and latch with an inverted output of the preceding flip-flop, a direct output of which is connected to a second input of the respective AND gate outputs of the second group of AND gates of the second group are connected to the input of the momenta and second outputs each bit of the shift register are connected to the inputs of the indicator device. The drawing shows the functional diagram of the proposed device for controlling triggers. The input 1 of the device is connected with the first inputs of the elements AND 2-1 - 2-11, the first group of the shift register 3 input by the input sbr (x: a display device 4 and the output of the pulse generator 5. Outputs 3-1 - 3 - P shift register 3 connected to the second inputs of the elements 2-2 and 2-, fi of the first group and the first inputs of the elements 6-1 to 6-: the second group, respectively. The shift outputs are connected to the corresponding information inputs of the indicating device 4. 2-1 is connected to the counting input of the first controlled trigger 7-1 on the stand 8. Outputs Of the first group, 2-C, they are connected to the counting inputs of the trigger 7-2-7, P., and the inverse outputs of the previous triggers 7-, - (7-h -1), respectively. Outputs 9-1 - 9-M shift registers are connected to the corresponding information inputs of the indicating device, 4. The outputs of all the triggers 7-1 7-h are connected to the second inputs of the elements 6-1 -6-P, respectively, the outputs of which are connected to the input of the ramp 5 pulses. The device works as follows. In the initial state, the direct outputs of all the meter triggers are in the zero state. The external starting pulse from the input goes to the first inputs of the AND 2-1 elements - 2 P, the shift register 3 returns the indication device 4 to the initial state. At the first outputs 3-1 and 9-1 of the register 3, shifts simultaneously generate single signals . The signal from output 3-1 is fed to the second input of the element AND 9-1 h nd gm 1 pt phop 5 of the element 6. The output signal of the element 2-1 goes to the counting input of the first trigger 7-1. The signal from output 9-1 is appropriately displayed on the indicator device 4, indicating that the test signal is applied to the first TpinTepi. If the trigger 7-1 functions correctly, it is moved by the test signal from the output of the And 2-1 element, and its direct output is a single signal that is applied to the second input of the AND 6-1 element. To the first input of element 6-1, a single signal is applied from the output, with the result that a voltage appears at its output, which is fed to the input of the pulse shaper 5. The shaper 5 outputs the second start pulse, which is fed to the input of the indicating device 4, to the input of the shift register 3, to the first inputs of the AND 2-1 elements 2-2 P, as a result of which the indicating device 4 returns to its initial state, a single signal from the outputs 3-1 and 9-1 goes to outputs 3-1 and 9-2 of shift register 3. Further, by analogy with the first test cycle, the signal from output 3-2 is applied to the second input of the AND 2-2 element and to the first input of the AND 6-2 element. The signal from output 3-2 is definitely displayed on the display device 4, indicating that a test signal is being sent to the second trigger 7-2. Functioning correctly, the trigger 7-2 under the action of the signal from the output of the element I is transferred so that at its direct output a single voltage level arises, fixing to the second input of the element 6-2. A voltage from output 3-2 is applied to the first output of this element, as a result of which, from the output of element 6-2, the signal is fed to the input of the driver 5 pulses. The latter gives the circuit the next third starting impulse. Thus, if the i-th trigger works correctly, then its output signal is appropriately fed to the formaker 5, pulses, which form the next starting pulse, to test for the trigger of the (i +1) -th trigger, etc. Obviously, during the verification process on the display device