SU949508A1 - Signal recorder - Google Patents

Description

one

The invention relates to a measurement technique and, in particular, to devices for registering fast processes.

A device for recording signals containing a measuring unit, an optical system, a vibrator unit and a pulling mechanism, forming a light beam oscilloscope, two sawtooth voltage generators, the outputs of which through the relay command block and the closing contacts of electromechanical relays are connected to the light beam oscilloscope inputs, and a group are known electromechanical relays designed to record information in digital form d.

The disadvantage of the device is the low speed and accuracy of registration.

The closest to the proposed technical entity is a signal recording device consisting of a series-connected master oscillator, a switch. A software block and a light-beam oscilloscope, a converter of a binary code into a binary-decimal code, connected to the second input of the software block, and a generator

. Linear-step voltage, connected by its input to the second output of the switch, and the output to the third input of program block 2.

The drawbacks of the device are the speed, as well as the impossibility of determining from the oscillogram the temporal parameters of the recorded signal (for example, the rate of change, etc.). This is because the recording of bits and the selection of a voltage step in a linear-voltage generator, corresponding to a given digit of each decimal discharge, is performed by the programmed block without any synchronous timing. Before recording the digit of the lower digit, all the digits of the higher bits are first recorded, and within the digit, before recording the last digit of the bit, information on the magnitude of all the major digits is analyzed sequentially, starting with zero.

The aim of the invention is to improve the speed while maintaining high registration accuracy. The goal is achieved by introducing an analog-to-digital converter, an N-channel digital-to-analog converter, a reference voltage source, and an adder to the signal recorder containing a binary-to-binary-to-binary-code converter and a hard-reading oscilloscope; A / D converter through serially connected binary-to-V converter; B-decimal coding; N-channel block of D / A converters connected to the inputs of a light beam oscilloscope The clock output of the analog-to-digital converter through an adder, to the second input of which the reference voltage source is connected, is connected to the power input of the N-channel digital-to-analog converter unit, and the analog-digital converter input is the signal recorder input. shows the functional diagram of the device; Fig. 2 shows the time diagrams of the input signal and its digital equivalent recorded by a light beam oscilloscope (for simplicity, only three bits are recorded). The signal recorder consists of a serially connected analog-to-digital converter 1, input 2 of which is the input of the binary converter's 3 converter to the binary-decimal code of the N-channel block 4 of the digital-analog converter and the light-beam oscilloscope 5 of the source 6 of the reference voltage connected through the adder 7 from input 1 power N-channel unit 4 digital-to-analog converters, and to the second input of the adder 7 connect the clock output of the analog-to-digital converter 1. The recorder is working after blowing way. An analog input signal, such as a linearly varying signal (Fig. 20), is converted using an analog-to-digital converter 1 to a CI4FOVOY equivalent, represented by a parallel binary code. Converter 3 of the binary code into the binary-decimal code converts the digital equivalent of the input signal tape into the parcel binary-decimal code. Simultaneously with the N-channel block of 4 digital-to-analog converters, each digit of the digital equivalent of the input signal is converted into a level voltage. At the same time, dp voltage shaping at the outputs of the N-to-block unit 4 of digital-to-analog converters uses the voltage of source 6 of the reference voltage, which is summed with the voltage of the clock pulses from the clock output of the analog-to-digital converter 1 and enters the power input of the N-channel block of digital-analogue converters. Voltage levels that affect the galvanometers of the light-beam oscilloscope 5, as well as time stamps equal to the conversion step of the analog-digital converter tlj, are formed from this total voltage. Parallel conversion of the digital binary-to-ten signal to analog allows you to record any digit of the digital equivalent Immediately, all the digits of the latter are simultaneously, which increases the speed of recording the input signal. At the same time, there is no distortion of the time scale. FIG. 2j and 2. shows a record of three digits of the number corresponding to the magnitude of the measured signal. In the diagram of FIG. 25 shows the change in the low-order digit, and the diagrams in FIG. 2nd and - digits of senior bits. For most measurements, five bits of the decimal number provide the necessary accuracy. Five sections of the recording fit the width of a commonly used photosensitive paper freely. The value T (Fig. 2S) is known, it is equal to the time between the conversion cycles of the analog-to-digital converter, and is the time scale for determining the time parameters of the signal (tracking period, rate of change, etc.). Thus, using the oscillogram, one can determine the magnitude of the signal at any moment in time and evaluate its change in any time interval. For example, dp time point T (figure 2), the numerical value of the recorded signal is 013, and for time T, 109. The slope of the sawtooth voltage (rate of increase) is equal to V. where A is the value of the register n and the voltage generated in the numerical expression, an is the number of conversion cycles. You can also record a pulse signal and measure its amplitude, period duration and time variation of these parameters using an oscillogram. The use of the proposed recorder of signals in comparison with the known devices provides documentary registration on the light beam oscilloscope in a digital form of a wide class quickly

Claims (2)

Claim A signal recorder comprising a binary-to-decimal-code converter and a light-beam oscilloscope, characterized in that, in order to expand the functionality, an analog-to-digital converter, a Ν-channel block of digital-to-analog converters, are introduced into it. the reference voltage source and the adder, while the outputs of the analog-to-digital converter through a series-connected binary-to-decimal-code converter and the N-channel block-digital-to-analog converters are connected to the inputs of the light-beam oscilloscope, the clock output of the analog-to-digital converter through the adder, to the second input which is connected to the output of the reference voltage source 10, is connected to the power input of the N-channel block of digital-to-analog converters, and the input of the analog-to-digital converter STUDIO recorder 15 is input signals. Sources of information taken into account in the examination 1. USSR Copyright Certificate No. 367386, cl. G 01 R 13/14, 1971. 2. USSR copyright certificate No. 700841, cl. G 01 R 13/14, 1979. t 1 ΊΑ (A/ g -1 ^g gp1..ig.GPTPSh | GPTT | glllllllll I1 ιιιιι ........ pt / ............... and. / G, FIG? VNIIIPI Order 5739/32 Circulation 717 Subscription - \ * Branch of PPP Patent, Uzhhorod, st. Project, 4