SU1767524A2 - Device for tape recording measurement signals - Google Patents

Abstract

The invention relates to the accumulation of information and can be used for magnetic recording of measuring signals. The purpose of the invention is to reduce the error of the magnetic recording of the measuring signals. In the device for magnetic recording of measuring signals on the author. No. 1610484 additionally introduced the bus 18 of the code of the initial bias value, the bias memory element 19, the third comparison element 20, the second reversible counter 21 and the bias former 22, the third recording amplifier 23 and the third recording magnetic head 24, the adder 25. This provides stabilization a constant component of the signal in the middle of the measuring range. Due to this, the signal is not distorted during a shift of the constant component of the signal. The second output of the bias driver is used to magnetically record the DC bias value of the signal. 18-19-20-21-22, 18-19, 23-24, 22-25, 2 or

Description

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The invention relates to the accumulation of information, namely, devices for magnetic recording of measuring signals,

A device for magnetic recording of measuring signals on the author. St. No. 1610484, contains the first and second recording magnetic heads connected to the outputs of the first OTR and the second recording amplifiers, a reversible counter, an integrator, a controlled amplifier and an information input bus, respectively. The first and second recording magnetic heads are mounted with a pair of movable magnetic tape. The device also contains a gain signal generator equipped with an input gain code connected to its first control input input bus and connected to the control input of the analog gain value. control amplifier connected by the output of the gain code to the input of the first recording amplifier and connected by the second control The first and second comparison elements connected to the summing and subtracting outputs of the reversible counter, subtracting elements, rectifier, memory element of the lower threshold of the signal, memory element of the upper threshold of the signal, Information bus connected to the information input controlled amplifier, the output of which is connected to the input of the second force of the recording body, with the first input of the subtracting element and g, the input of the integrator. The integrator output is connected to the second input of the subtraction element, the output of which is connected via a rectifier to the first inputs of the first comparison element and the second comparison element, respectively, connected by the second inputs and outputs, respectively, of the lower-level memory element,

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The device allows a change in the gain of the adjustable amplifier depending on the change in the amplitude range of the measurement signal to reduce the error in magnetic recording.

The disadvantage of this device is the possible occurrence of distortions of the measuring signal when the constant component is shifted from the middle of the measuring range, which leads to an increase in the error in the magnetic recording of the measuring signal.

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The aim of the invention is to reduce the magnetic recording error.

This goal is achieved by the fact that in a device for magnetic recording of measuring signals according to the author. St. No. 1610484, serially connected offset value code bus, bias memory element, third comparison element, second reversible counter and bias driver, serially connected third recording amplifier and third recording magnetic head, adder, through which the output of the controlled amplifier is connected to the input of the second amplifier records, with the first input of the subtracting element and the input of the integrator, while the first output of the bias driver is connected to another input of the adder, the second input - to the code bus of the initial bias value, the second output to the input of the third recording amplifier, and the other input of the third reference element is connected to the output of the integrator.

The essence of the invention is that when a measuring signal of a series-connected bus is introduced into a device for magnetic recording, the initial displacement value code, the bias memory element, the third comparison element, the second reversible counter, the bias generator, the adder and the third recording head are connected in series the constant component of the signal is stabilized in the middle of the measuring range, and magnetic recording is also carried out The shutter biasing D.C. signal. Due to this, signal distortions are avoided when the DC component is biased.

In addition, during playback and processing, the constant offset value recorded on a magnetic carrier is used to determine the true value of the recorded measurement signal. The recorded signal offset value can also be used to shorten the processing time. In this case, only those parts of the measurement signal recording are analyzed in which the value of the initial displacement differs from the current one recorded on magnetic media.

Thus, additional elements give the device a new property, which manifests itself in a positive effect: a decrease in the magnetic recording error of the measuring signals by eliminating the distortion of the measuring Signal when the constant component is shifted

signal from the middle of the measuring range.

The conducted patent search showed the absence of devices for magnetic recording of measurement signals with the proposed set of features, as a result of which the solution can be recognized as having significant differences.

Figure 1 shows one of the possible variants of the proposed device for magnetic recording of measuring signals; ka of Fig. 2 is an apparatus for reproducing and processing recorded measurement signals.

The device contains the first and second recording magnetic heads 1 and 2 connected to the outputs of the first and second amplifiers 3 and 4, respectively, the reversible counter 5, the integrator 6, the controlled amplifier 7 and the input bus 8 of information. The first and second recording magnetic heads 1 and 2 are mounted so as to mate with a movable magnetic tape 9.

The device also contains a gain signal generator 10, equipped with an input bus 11 of a source gain value code connected to its first control input, connected by an analog gain value output with a control input of a controlled amplifier 7, connected by an output of a gain factor code to an input of the first recording amplifier 3 and the second control input connected to the output of the reversible counter 5, the first and second comparison elements 12 and 13 connected by the outputs respectively -retarded with summing and subtracting input of down counter 5, the subtractor element 14, a rectifier 15, an element 16 of the lower threshold signal storage element 17 and an upper signal threshold storage. The information input bus 8 is connected to the information input of the controlled amplifier 7, the output of which is connected to the input of the second recording amplifier 4, to the first input of the subtraction element 14 and to the input of the integrator G. The output of the integrator 6 is connected to the second input of the subtraction element 14, the output of which is connected the rectifier 15 with the first inputs, respectively, of the first comparison element 12 and the second comparison element 13, connected by second inputs to the outputs, respectively, of the lower threshold signal storage element 16 and the memory element 17 no high threshold signal.

In addition, the serially connected bus 18 of the initial offset value code, the bias memory element 19, the third reference element 20, the second reversible counter 21, and the bias generator 22, are introduced into the device for magnetic recording of measuring signals.

a third recording amplifier 23 and a third recording magnetic head 24, an adder 25 through which the output of controlled amplifier 7 is connected to the input of the second recording amplifier 4, are connected in series with the first input of subtractor 14 and the input of integrator 6, the first output of the imager 22 the offset is connected to another input of the adder 25, the second input to the bus 18 of the source code

2 offset values, a second output to the input of the third recording amplifier 23, and another input of the third reference element 20 is connected to the output of the integrator 6.

The equipment for reproducing and processing the recorded measurement signals (Fig. 2) contains reproducing magnetic heads 26, 27 and 28, mounted with interface with magnetic tape 9 and connected to the inputs of amplifiers 29, 30 and 31, respectively, of the deck, connected with information inputs. the inputs of the recorder 32. The output of the playback amplifier 30 is connected to the first input of the subtracting element 33 connected by the second input to

0 to the output of the initial gain value element 34, the output of the subtraction element 33 is connected to one of the inputs of the OR element 35 connected by the output to the control input of the recorder 32. The playback amplifier 31 is connected to the information input of the recorder 32 and the first input of the comparison element 36 connected by a second input to the output of the memory element 37

0 of the initial value of the DC offset of the signal, the output of which is connected to one of the inputs of the OR element 35. The operation of the proposed device for magnetic recording of measuring signals

5 is as follows.

A measuring signal characterizing a random process is fed through the input bus 8 of information to the controlled amplifier 7. The measuring signal from the output of the controlled amplifier 7 also goes to the first input of the subtracting element 14 and to the input of the integrator b, which forms the average value of the measuring signal, Integrator 6 affects the second input of subtraction element 14, which forms

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the difference between the current value of the measurement signal and its average value. The subtraction element 14 acts through the rectifier 15 on the first and second elements 12 and 13 of the comparison, which are received

respectively, the codes of the lower and upper thresholds of the signal from the element 16 for storing the lower threshold of the signal and from element 17 for storing the upper threshold of the signal. The first comparison element 12 generates a pulse train if the signal of the rectifier 15 is less than its lower threshold, and the second comparison element 13 produces a pulse sequence if the signal of the rectifier 16 is greater than its upper threshold. The first and second elements 12 and 13 of the comparison act on the reversible counter 5, the output of which is fed to the gain signal generator 10, which generates the analog value of the gain factor and the gain factor code. The gain code from the gain signal generator 10 passes through the first recording amplifier 3 to the first recording magnetic head 1, which records it on the moving tape 9. The analog value of the gain signal goes to the controlled amplifier 7, setting the value of the gain of the latter.

The integrator 6 also acts on the first input of the third reference element 20, the second input of which receives the constant offset code of the signal from the offset signal storage element 19.

The third comparison element 20 generates a pulse sequence at the first output if the current average value of the signal is less than the original offset, or a sequence of pulses at the second output if the current average value of the signal is greater than the value of the initial offset of the signal constant. Comparison element 20 generates signals for a constant deviation from the middle of the measurement range. The first output of the comparison element 20 acts on the summing input, and the second output of the element 20 on the subtractive input of the reversible counter 21, the output of which is fed to the DC bias generator 22, which, similarly to the imaging unit 10, generates the analog DC bias value and bias code constant component. The DC offset code from the imaging unit 22 is fed through the recording amplifier 23 to the recording magnetic head 24, which ensures its recording on the moving magnetic tape 9. The analogue bias value of the constant component goes to the second input of the adder 25, setting the offset value to the constant component . The results of the recording of the measuring signal, the gain code and the constant offset code are reproduced.

respectively reproducing magnetic heads 26,27 and 28, acting respectively on amplifiers 29,30 and 31 of reproduction.

The reproduced measurement signal, the reproduced gain code and the constant bias code from the outputs of the playback amplifiers 29,30 and 31 are fed to the information inputs of the recorder 32. The reproduced 5 gain code from the output of the amplifier 20 is also fed to the subtraction element 33, to which the element 34 of storing the initial value of the gain is also affected.

 The subtraction element 33 generates a control pulse if the initial value of the gain exceeds the reproduced current value of the gain. In this case, the impulse from the subtraction element 33 comes through

5 element OR 35 to the control input of the register 32. The reproduced constant offset code of the signal from the output of the amplifier 31 also goes to the comparison element 36, which is also affected

0 is an element 37 for storing the initial value of the constant component bias. Comparison element 36 generates a control pulse if the initial DC offset of the signal is

5 deviates from the reproduced current DC offset value. The pulse from the comparison element 36 is fed through the OR 35 element to the control input of the recorder 32.

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Claims (1)

Invention Formula A device for magnetic recording of measuring signals on the author. St. No. 1610484, 5 characterized in that, s; In order to reduce the write error, serially connected bus of the code of the initial offset value, the memory element of the offset, the third Q reference element, second reversible counter and bias driver, a third recording amplifier and a third recording magnetic head connected in series, an adder through which the output of the controlled amplifier is connected to the input of the second recording amplifier, to the first input of the subtraction element and to the integrator input, with This first output of the bias driver is connected to another input of the adder, the second input to the bus of the initial value code, the second output to the input of the third recording amplifier, and the other input of the third H ABOUT ABOUT Comparison element connected to the integrator output.