SU516999A1 - Time Meter - Google Patents

Description

(54) TIMER INTERVAL METER

The invention relates to a control measurement technique, intended for automatic measurement of time intervals. : A device for measurement is known. time intervals containing an impulse elevator pulse shaper, control trigger, counter, electronic; Key, electronic two-beam storage tube, recording scanner and successively connected back generator generator of sweep voltage and measuring pulses, control unit: , input block and backlight circuit. The purpose of the invention is to increase reliability and simplify the circuit. ; The proposed amplifier is characterized in that it is equipped with an amplitude selector; a time gate rum, a memory block of fixed and instantaneous values of locally sweep voltages, a local sweep advance unit and a local sweep voltage generator (Niy, whose two inputs connect to the outputs of the write scanner, and two outputs to the inputs of the local sweep promotion unit and the storage unit of fixed and instantaneous values of locally sweep voltages, the outputs of which through the unit advancing the local scanner connected to the inputs i dvuhtucheiBCj storage tube. In this case the control input of flip-flop through {amplitude (time window selector podalyuchen I to output amplifier -formirovatel impulsovI marks and to the third input of the memory block i permanent and instantaneous values of I locally deploying voltages The fourth inlet of which is connected to the output of the control unit: In Fig. 1, the functional diagram of the time interval meter, is shown, and in fig. 2 presents temporary apagpaMN№i his work. The meter contains an input unit 1, a storage, cathode-ray tube 2, a write sweep unit 3, a nearby block, or a local sweep 4, specify 1 (1 generator-shaper of sweeping stresses and measuring pulses 5, 4) voltage 6, storage unit of constant and instantaneous values of local sweep stresses 7, control unit 8, illumination circuit 9, counter Yu, control trigger 11, electronic switch 12, pulse forming amplifier 13 and temporal amplitude selector Rrba 14 {The meter works as follows. After switching on the device, the driving generator of the sweeping voltages and the measuring pulses 5 generates sinusodal voltages at a predetermined amplitude of the frequency f to obtain a circular scan with a period TQ with the help of the scanner. It also generates dimensional pulses arriving at the electronic key 12, and a start signal to the control unit 8. The latter generates a synchronization impulse arriving at the object of study 15, the reset pulse of the counter 1O to the initial zero state, the resolving potentials arriving at the single and zero inputs. control trigger 11, as well as sequentially in time, controls the recording cycle of the baseline, the recording cycle of the starting and stop pulses (charge marks), which limit the measured time interval, simultaneously tracking and reading of charge AO marks the start and stop. After recording the baseline circular line, with the reference object 15, the start and stop pulses are sent to the cathode of the recording beam ZELT 2 from the object of study 15 through the input unit 1. At the same time, the current of the recording beam in the Iomept of the arrival of interval pulses increases, as a result of which the depth of the potential relief of the starting marks of the start and stop pulses is greater than the depth of the potential relief of the base circular line. Thus, the measured time interval between the start and stop pulses is fixed on the ZELT 2 target against the background of the base circular line in the viewpoint of charge marks limiting the segment of the arc i of the circular scan with a period T. This ends the write cycle and begins the read cycle. In advance, on command from the control unit 8, the deflection plates of the read beam ZELT 2 from the storage unit of constant and instantaneous values of local unwinding tension 7 through the unit of promotion of local sweep 4 are supplied with constant voltages. At the same time, from the master oscillator 5, a recorder scanner 3, a local sweep voltage generator 6 containing a frequency divider and a sweep voltage amplitude attenuator, are supplied with voltage amplitude. and the frequency W in the block of promotion of a locale scan 4 (here P and g) are integers. The control unit 8 generates a control & l jitter impulse arriving at the illumination circuit 9. After this, a read illumination pulse is generated, which is fed to the read-beam modulator of the ZELT2 beam. The read beam opens and turns on a ZELT target in the form of a circular local line with a center located on a previously recorded circular base line of radius R. During a circular scan at the time of crossing the reading beam of a local sweep, a potential ZELT plate appears in the load. impulse mark. The amplifier-shaper (with anchoring scheme) 13 amplifies the read pulse-mark and provides temporary fixation by the position of its top. In order to eliminate the false triggering i from the impulse noise induced on the signal plate during commutator voltage switching, simultaneously with the illumination pulse, the amplifier-pulse generator 13 is fed from the illumination circuit 9 a selector pulse of a predetermined duration, which separates the read pulse. The outdated and amplified pulse mark enters the storage unit 7, to the second input of which two sinusoidal sweeping voltages are shifted in phase by 9 ° C through channels X and Y. The storage unit 8 contains constant and instantaneous values of sweep voltages connected to each other by adders. The phases of the sweeping sinusoidal voltages of channels X and Y are rigidly connected with the meeting point of the reading beam of the local circular scan and the potential relief of the baseline. These fixed instantaneous values of local sweep voltages along channels X and Y are separately added in storage unit 7 with initial voltages from control unit 8 corresponding to the initial one. the position of the center of the local sweep with J coordinates X,;. W. In this way, the velocity vector, i.e., prire, Shaney displacement of the reading beam of the local circular scan and t / fAU ;, iiti, - (L Uh) is formed. on the axis X and U of the target ZELT, With the help of an advancement block: by tracing paper of sweep 4, which contains, in addition to the amplifying matching cascades through | channels X and Y, the summers of local sweep voltages (obtained in the opposite unit) of the velocity vector , reads the beam from the axis in the direction of bypassing the base circle. At the same time, the center of the local circular scan is moved to the distance uljf, to the point of the ZELT target with coordinates X, Y, and also has a direction: bypassing the base line. After that, the J pulse feedback from the amplifier-pulse pulse generator 13 prohibits the passage, the read beam modulator is pointed to, the read light illumination pulse ZELT, the beam is closed and draws an imaginary second semicircle with the center at the next point (X, Y), the bypass direction baseline. After three-quarters of the local sweep period from the moment of the appearance of the marking pulse, the control unit generates a signal on the illumination circuit 9. The latter again generates a read illumination pulse arriving at the read beam modulator ZELT, the counting beam opens and crosses the base line at the next point — it reappears pulse mark, and the process is repeated as described; nom ,,,, If the center of the reading local span; moves away from the baseline, the phase of the point where the reading beam meets the potential relief of the baseline accordingly changes, respectively, the value of the phase of the sweeping voltages along the X and Y channels at the moment of arrival of the elevation mark, and consequently, the instantaneous values of the sweeping sinusonal stresses corresponding to the marked phase. This change is converted in the storage unit 7 into reverse increments of constant diagrams of 5 di di (via channels X and Y) and returns to the center of the local ravertroke advance unit 4, the center of the local par: wrap in the direction of the base circular line. Thus, with a total effect of the sweep voltage and error signals, the reading beam moves along a cyclonic path along the base circular line, thereby tracking the latter, at the moment of intersection by the read beam; the mark located in the baseline contour of the signal plate load: here, the ZELT also produces impulse marks, but its amplitude is N times larger, and the amplitudes of the pulse mark from the intersecting beam of the base circular I line. I Selected and amplified impulse | mark is similar to the cycle: tracking enters storage unit 7, where analogs but gates in time those instantaneous values of the amplitudes of the sweeping voltages across channels X and Y, which in time (phase) correspond to the moment of the appearance of the impulse-mark . A velocity vector is determined, and the read beam is moved to the next point in the circumferential direction of the base circular line for a subsequent simultaneous tracking and reading cycle. The impulse-mark from the intersection of the reading beam of the potential relief | the charged mark from the amplifier -form- | Tel through the amplitude selector of the time 14 gate 14 is fed to the single input of the control trigger 11. Simultaneously; but here comes the potential from the control unit 8, allowing passage, the value of only one pulse-mark. The tipping trigger triggers, thereby ensuring the transmission through the electronic key of 12 dimensional pulses into the counter 1O. ; When reading the charged mark from the control unit 8, the enable potential is applied to the zero-in trigger of control 11. The pulse-mark returns the latter to the initial one; position, stopping the access to it of the measuring impulses. The counter is recorded; the result of the time interval in the converted time scale is k f., Where k is the time scale conversion factor, depending on the length of the circular line, the frequency of the local readout scan, and the values of the voltage increments. uUj and AlJy on the storage elements of canines X and Y (storage unit 7) in a linear displacement d1u, l1m of the beam in the direction of walking around the baseline. At the moment of transferring the trigger of control 11 by the pulse-stop mark to the initial state, the control unit 8 receives a signal with the help of which, in this block, control signals are generated in time, which set the counter 10 and the termination signal 11 to the initial zero state; as well as control signals, recording, tracking and scheduling cycles.,,. .

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A time meter, containing an amplifier — a pulse marker generator, a control trigger, a counter, an electronic key, an electronic two-beam memory tube, a recording scanner, and sequentially connected master oscillator — generator of sweep voltages and measuring pulses, i control unit, input unit, and backlight circuit characterized in that, in order to increase the reliability and simplify the circuit, it is equipped with an amplitude selector of a temporary gate, a storage unit of constant and instantaneous local sweep stresses by a local sweep advancement unit and a local sweep shaper unit, two inputs of which are connected to the output of the scanner, and two outputs to the inputs of the local sweep promotion unit and the storage unit of fixed and instantaneous values of locally sweepable voltages. the outputs of which through the block sweep of the local sweep are connected to the inputs of a double-beam memory tube, while the control trigger input through the amplitude selectfr in emo nnogo tup ba connected to vyhotsu amplifier -formirovatel impulsrv-otmegok and to the third input of the storage unit and the permanent locally deploying instantaneous values voltages fourth input coupled to an output of the control unit.

FIG.