SU1052127A1 - Scale-time converter - Google Patents

Abstract

A SMALL-TIME TRANSMITTER, containing a series-connected sweep generator, an electronic beam tube, a read amplifier, a digital conversion unit and a memory device, as well as a calibration unit, a horizontal sweep generator and a control unit, the first output of which is connected to the first input of the unit. calibration, the output of the latter is connected to the code of the horizontal scanning generator and the second input by means of a cathode ray tube, the second one. The output of the control unit is connected to the input of the horizontal scanning generator and to the second input of the digital conversion unit, which is based on the fact that, in order to increase the output and reliability of the converter, the gating pulse generator and the unit are inserted into it. linear transmission, the output of which is connected to the third memory input (L cathode ray tube, the output of the gating pulse generator is connected to the inputs of the sweep generator, linear transmission unit, the control unit and the second input of the cal block ibrovki .. sl ts9 to Kl Start Signal Fi9.1

Description

1- 1 The invention relates to electrical measuring equipment and can be used to register and pre-. the formation in the digital form of single or each of a sequence of rarely subsequent pulsed electrical signals of micro-nanosecond ranges of durations. A time-to-scale converter (FEP) is known that contains a storage cathode ray tube, a vertical scanning generator, a horizontal scanning generator, blocks providing recording modes, reading and digitizing pulsed electrical signals D J. - The disadvantage of the known device is the presence of a double-beam tubes, one beam of which is for recording, the second beam is for reading. The presence of a two-beam tube leads to the complexity of the converter and the reduction of the speed of the converter. The closest technical solution to the invention is a time-scale converter containing a storage cathode-ray tube (ZELT), to which horizontal deflection plates a generator of a sweep is connected, to the first pair of vertical deflecting plates a horizontal sweep generator and a generator of gauge sine, ideal time stamps, serially connected amplifiers, a digital converter unit and a storage device are connected to the signal plate of the ZELT, the first The code of the control unit is connected to the ne input of the generator of calibration sinusoidal time stamps, the second code is connected to the input of the horizontal scanning generator and the control input of the digital conversion unit, the input of the control unit is connected to the first control input of the converter, as well as the switch. element IS, trigger reverse line 2j. The disadvantages of the prototype device are low speed and low reliability, due to the fact that a switch is used in the known device, having carried out the switching of the deflection plates of the ZELT during the transition from recording mode to sharing mode and vice versa. 7. 2Transformation time T known device will consist of the following components: T T, + TK, + TCU + T., T, + T, - 2 T ,. X. Т ,, „+ 2Т к, since ,, -К1 T, j Т de Tg is the recording time of the signal under study on the target ZELT Тз - 10-« ... 10 s; T (is the switching time of the deflection plates of the ZELT when switching from recording mode to reading; - the time of reading the recorded relief from the ZELT target; T, is the time of switching of the deflection plates of the ZELT when switching from reading mode to recording mode. Obviously, T, ci Tj T remultiplicating switching terminals of the ZELT are determined by the switch switching time. The characteristic switching times of the modern broadband switches are 40-100 ms. The T times are (Tc), T: N / FCM NTc "(2) where N - number of rows count Fj-c is the frequency of the read lines. Substituting in the expression. (2) characteristic values N 200, 10 kHz (1), we get Tc 200 / 10-10 240-2 20 ms. Thus, the minimum conversion time of the known device can be estimated according to the expression (1): T 20 ms - 2-40 ms 100 ms Yu-Chs, and the maximum frequency of the recorded signals will be - o: gs Long conversion time also leads to a decrease in the reliability of registration of the studied signals, . since there is a possibility of partial or complete destruction of the recorded information at small proper storage times of the charge by the ZELT target, which occurs at

the use of microchannel plates -.% Tin as a charge accumulator. .

The aim of the invention is to improve. performance and reliability, converter .5

The goal is achieved: by the fact that in a time-scale converter containing a series-connected sweep generator, which stores an electron-Yu-beam tube, the amplifier is read-; A digital device, a digital storage unit, a memory device, as well as an alibrika unit, a horizontal scanning generator and a control unit, the first output of which is connected to the first input of the calibration unit, the output of the latter is connected to the code of the horizontal scanning generator and the second input of the storage 20 electronic -beam tube, the second output of the control unit is connected to the input of the horizontal scanning generator and to the second input of the digital conversion unit, a gating pulse generator and a block of inverse transmission are inserted, otorrhea connected to the third input of the storage cathode ray tube, the generator output strobe momentum pulses LP is connected to the inputs of the timebase, the linear transmission unit, the control unit and the calibration unit vtoroya entry.

FIG. 1 shows a structural .3,5 scheme of the time-scale converter; in fig. 2 - time diagrams of his work; in fig. 3 is a diagram illustrating the mode of scoring; in fig. 4 - time 40 diagrams illustrating the recording of a sine wave; in fig. 5 ZELT beam movement when recording a sine wave and longitudinal reading. The diagram number coincides (5 with the position of the block of the device shown in Fig. 1.x.

. .

The Converter contains a storage cathode-ray tube 50 (EZLT) 1, the generator 2 scanner, the generator 3 horizontal scan, block 4. calibration, 5 readout amplifier,

digital conversion unit 6, control unit 7, storage device 55, gating generator 9

pulse, block 10 linear transmission.

- The operation of the transducer occurs as follows (see, temporary diarammas in Fig. 2).

An external trigger signal coming from the Start-up terminal to the strobe pulse generator 9 produces a square pulse whose duration determines the rise time of the forward edge of a triangular pulse generated by a sweep generator. The time is equal to the recording time of the signal being studied on the target CRT tube. one,

At the same time, the duration of the decay of the pulse amplified by the sweep generator is chosen equal to the readout time of the electronic image of the signal under study from the ZELT target.

Thus, the control of the movement of the ZELT beam along the horizontal axis X in the plane of the target, both when recording and scoring the signal under study, is carried out by the voltage generated by one converter node: generator 2 sweep.

The output pulse of the gating impulse generator 9 (Ñsa also enters the input of the linear transmission unit 10, allowing the investigated part of the recorded signal to pass to the vertical deflection system of the ZELT converter (see Fig. 2). This records the recorded signal on the ZELT target in the form of an electronic (charge image, after which the converter immediately goes into read mode.

The movement of the beam in the plane of the ZELT target in the recording and reading modes of the signal under study is shown in FIG. 3

When reading on the trailing edge, the strobe pulse produced by the generator 9, the control unit 7 is started, which controls a series of time synchronization pulses of the converter operation.

For each pulse of the control unit 7, a horizontal scanning generator 3 is triggered, producing triangular voltage with the same rise and fall times.

5 10

The pulses from the output of the horizontal scanning generator 3 are fed to the first vertical deflection plates of the ZELT 1 transducer and the implementation is to control the movement of the beam along the vertical axis in the read mode of the recorded information from the ZELT1 target. In this case, the target ZELT is scanned with a raster with the mutually opposite direction of reading the neighboring lines, the number of which is determined by the number of pulses outputted by the horizontal scanning generator 3 during the decay time of the horizontal scanning unit voltage (see FIG. 2, FIG. 3).

When the beam moves along the vertical axis V in the MLS plane ZELT1, the instantaneous values of the recorded signal are crossed at each intersection of the beam of the electronic image line (see FIG. 3), in this case in the signal circuit of the ZELT1 signal plate. t-eye pulses appear, the temporal position of which relative to the beginning of the beam movement is proportional to the corresponding instantaneous amplitudes of the recorded signal.

Next, the current pulses are amplified by the amplifier 5, and together with the starting pulses of the horizontal scanning generator 3, they are fed to the input of the digital conversion unit 6, which encodes the read ordinates of the recorded signal.

The digital information from the digital conversion unit 6 is copied to the storage device 8, from where it can be output at any time to a visual display device of the form of the signal under study or to an external processing device (for example, a computer).

Another feature of the proposed device is the use of a longitudinal reading of a calibration sine wave in order to increase the accuracy of determining the scale of the converted signal in real time units.

The work of the proposed scale-time Converter when this happens as follows.

On an external signal, Automation, the control unit 7, blocks the generator 3 line scanning and starts the calibration block 4, which produces

7 6

cynycoid-j voltage (new form, appearing on vertical deflecting plates of the self-propelled laser sensor.

Upon admission to the input device. Signal Start The sine wave is recorded on the ZLT target as described (see also the timing diagrams in Fig. 4).

The reading takes place immediately after recording during the ZELT1 retrace under the control of the horizontal scanning unit, fla FIG. Figure 5 shows the movement of the ZELT beam during recording (the beam moves from left to right along the trail of a sine wave) and longitudinal reading (the beam moves from right to left, crossing the potential relief of a sinusoidal image left by it earlier).

The time intervals (i ... 1,2 ..., N; N. Are the number of intersections) corresponding to the start of the movement. The ZELT sensor, when compiled before each intersection with the potential relief line of the recorded sinusoid, is encoded by the digital conversion unit 6 and is recorded in the memory device. 8 for use — when reconstructing the actual ratios of the signals under study when they are processed on a computer.

Thus, in the proposed IBE, by excluding the commutation time of the deflecting plates of the EELT from the total conversion time, will reduce it to. TI, y values of 20 ms and raise the frequency of the recorded signals up to 50 Hz, which is 5 times higher than the speed of the known converter.

As the axis noted, the response time of the linear transmission unit is negligible (one-ten nanoseconds) compared with the reading time.

The second advantage of the proposed IBE in comparison with the prototype is the higher reliability of recording single or randomly repeating - pulses; due to The fact that the reading is performed immediately after the information is recorded, while in the IBE prototype. The reading can be started after the time required for switching the deflection plates, i.e. in 40 ms, during which information destruction may occur.

Record

Start CvufTibiSoHue

g

Cuthoa

UL

Yu

,, Starting position / lyt / a

ASmt

tonatiha

WWVW

,

jj h

Records

t 1 1 I I

Cvttrnbt8aft4 €

Claims (1)

A SCALE-TIME CONVERTER comprising a series-connected sweep generator, a cathode ray tube reader, a reading amplifier, a digital conversion unit and a storage device, as well as a calibration unit, a horizontal scanning generator and a control unit, the first output of which is connected to the first input of the calibration unit, the output the latter is connected to the output of the horizontal generator and the second input of the storage cathode ray tube, second. The output of the control unit is connected to the input of the horizontal generator and to the second input of the digital conversion unit, with the aim that, in order to increase the speed and reliability of the converter, a gate pulse generator and a linear block are introduced into it pass, the output of which is connected j to the third input of the storage tube G 'of the cathode ray tube, the output | A of the strobe pulse generator is connected to the inputs of the rotary generator | linear transmission unit, · ~ control unit and the second input of the cal edge. „1052127> - 1052 127 2 ’