SU991511A2 - Memory - Google Patents

Description

(54) STORAGE DEVICE

The invention relates to automation and computational techniques and can be used in systems for automatic measurement of impulse processes and, in particular, in measurement systems for mechanical and acoustic impulse processes.

According to the main auth. 830578, a device containing an analog-to-digital converter (ADC) is known, one of the inputs of which is connected to a trigger trigger unit, the output is connected to one of the main register inputs, the output of a threshold triggering block is connected to an input of a control unit, a clock generator connected to the second inputs an angular-digit converter and a main shift register and a synchronization unit associated with the third input of the main register, an additional shift register and an AND element whose inputs are connected to a clock generator and the pulses and the control unit connected to the first input of the additional shift register, the second input of which is connected to the output of the AND element, the third input to the output of the main shift register, and the latch of the extreme value of the function.

the input of which is connected to the input of the ADC, and the output - to the second input of the threshold trigger block.

In this storage device, the registration of pulse signals is carried out with reference to the extreme value of the pulse signal, the latter provides increased reliability of the device along the trigger circuit under the conditions of interference or wide dynamic input signals, i.e. in conditions when threshold devices become ineffective. The greatest effect is obtained when registering single pulses that have a pronounced extremum and monotonous nature of reaching the extremum.

When registering pulses difficult

20 forms with several local extremes, a situation is possible when, during the recording process, the startup block re-triggers from secondary local extremes exceeding

25 largest primary. When the recording process of the device that triggered from the first extremum is not yet completed, repeated triggers of the launcher do not change 1 / mode of operation.

30 devices. This leads to

the location of the extremum of the pulse process inside the additional register can be arbitrary, and the location of the extremum of the function can be at the very end of the recording process. At the same time, the part of the pulse process following its extremum turns out to be unregistered.

A disadvantage of the known device is the presence of a dead time interval in the trigger chain, this reduces its resolution.

The aim of the invention is to improve the reliability of the device by eliminating the loss of information in any form of a pulse signal.

The goal is achieved by the fact that the initial address driver, which input is connected to the output of the start trigger unit, is entered into the memory, and the output of the initial address generator is connected to the fourth input of the additional shift register.

The drawing shows a functional diagram of the proposed device.

It contains an analog-to-digital converter (ADC) 1, the main shift register 2, the OF element, the additional shift register 4, the threshold trigger block 5, the control block 6, the clock pulse generator 7, the clock synchronization block, the clamp 9 of the function's extreme values, the shape 10 starting addresses.

The initial address shaper is designed to set an additional register 4 of the shift to the initial state at an arbitrary point in time.

Depending on the construction of the register 4, which is the unit of information storage in the device, the imaging unit 10 can be made in different ways.

For shift registers having a common reset of all the memory elements, this may be a pulse generator with a single start.

For shift registers made on the basis of the operative memory of the type address, it can be executed as a generator of a code combination corresponding to the initial state of the operative memory, etc.

The device works as follows.

The analog input signal is fed simultaneously to the inputs of the A / D converter 1, the threshold trigger unit 5 and the latch 9 of the extreme function value. In A / D converter 1, the input signal, in time with the incoming pulses from generator 7, is converted into a sequence of discrete samples taken at equally spaced intervals and represented in binary code. Function samples in digital form are fed to the main register 2, through which they are passed from the input to its output using a clock generator 7 and a block, 8 synchronization.

At the output of the main register 2, the samples appear with a delay equal to the time taken to pass one sample through all the memory cells of register 2.

The delayed sequence of digital samples is fed to the input of the additional register 4 and depending on the operation of the starting unit 5 and the control unit 6 or analyzed at the inputs of the additional register 4 or in time with the generator pulses 7, we are looking for the register 4 through the element 3 and entering the additional register 4. The start-up unit 5 is triggered at the moment when the signal from the release of latch 9 arriving at one input of block 5 exceeds the value of the input signal arriving at the second input of the start-up unit 5. This happens at the moment when and the input signal after reaching the extreme value begins to decrease in magnitude. After the block 5 is triggered, the control block b is started, which forms an interval corresponding to the pulse duration according to a given criterion. At the time of this interval, the prohibition is removed from the AND 3 element and the sequence of digital samples in time with the pulses of the generator 7 enters additional register 4. During this time interval, all digital samples arriving at the input of additional register 4 are sequentially entered into it.

In the case of a complex waveform with several local exceptions of g / mo, the start-up unit 5 is triggered many times during the time interval formed by the control unit 6 when the write mode in the additional register 4 is performed.

At each successive triggering of the starting block 5, the generator 10 of the setup signal simultaneously operates. By its output signal, each time shaper 10 generates a setup signal to the initial state of register 4, i.e. in its state, from which the process of recording information began. Each time, the previously recorded information is erased when the newly received information is recorded in its place.

Claims (1)

Regardless of the moment of the last triggering of the start block 5, corresponding to the extreme value of the input signal, in register 4 of pe5. 99 a section of the input signal is entered, including the neighborhoods of its extreme value, i.e. proper impulse process. In this case, due to the return of the shaper 10register 4 to the initial state each time the start-up block 5 is triggered, including when the register record 4 is not completed yet, the pulse signal is registered in the latter in such a way that its extreme value is recorded in one and the same the same place of the register 4. The process section preceding the extreme value of the pulse, this being determined by the delay performed by the main register 2, and characterizes the leading edge of the pulse preceding the operation of block 5 ka. As follows from the description of the operation of the device, it retains all the positive properties of the proposed invention, i.e. the possibility of registering the history of the impulse, increased reliability in the trigger circuit by automatically re-adjusting the trigger level, resulting in the elimination of spurious starts of the device even in the event of interference, compared with the pulse amplitude. Compared with the known device, it possesses a higher resolution on the device launching circuit, since it does not lose the ability to control the trigger circuit even in the case of the device that has entered the recording mode. . 116 The latter provides the exclusion of loss of information in any arbitrarily complex pulse waveforms. The proposed device can be used in the initial stages of physical experiments, when the signal-to-noise ratio, the useful signal level and the shape of the recorded pulse process can vary widely. as in those cases where known threshold devices have limited use. Formula of the invention. Storage device according to auth. 830578, characterized in that, in order to increase the reliability of the device by eliminating information loss in any form of a pulse signal, a shaper of the initial address is entered into it, the input of which is connected to the output of the trigger trigger unit, and the output of the starting address shaper is connected to the fourth input of the additional address Shvgistra shift, Sources of information taken into account in the examination of 1 USSR author's certificate 830578, cl. G 11 C 19/00, 1980 (prototype).  kJ T