SU506869A1 - Statistical analyzer - Google Patents

Description

the synchronizer outputs are connected to the code comparison unit and the inputs "1 and" 2 of the switch 7a, respectively, the output of the latter being connected to the block of the AND 3 elements.

The voltage of the studied implementation t / in (t) at discrete instants of time is converted by ADC 1 into a parallel code. The sampling period is set by the synchronizer 2 in accordance with the frequency characteristics of the input signal. In addition, it provides a sequence of time-separated signals to control the operation of the analyzer as a whole. The device works in two modes.

In the analysis mode of the highs (lows), the switches 7a and 76 are in the position "1 (" 2). At the same time, at each clock cycle, the ADC outputs the code value corresponding to the input voltage. The code comparison block, which compares the number recorded in the ADC, with the number stored in register 4, is delayed relative to the sampling moment of the synchronizer pulses with the number stored in register 4. In the initial state, the register is zero, therefore the ADC code is greater than the register code and block 6 outputs a signal through the “- f, setting trigger 8 to one state. After performing the comparison operation, the synchronizer will issue signals to write the ADC code to the register and zero the ADC. Therefore, in any work cycle, the current process value is compared with the previous one. If the process studied monotonously increases, then after each measurement the ADC code will be longer than the register. As a result, block 6 generates a sequence of pulses through the bus “+. If the voltage of the implementation under study starts to decrease, the value of the code stored in the register becomes greater than the value of the ADC code. In this case, block 6 sends pulses through the bus "-", the first of which switches trigger 8 to the zero state. The voltage drop taken from the single output of the trigger corresponds to the maximum of the process (position 1 switch 76), information about the true value of which is stored in register 4. This difference allows the maximum value to be written to the multi-channel recorder 5. Similarly, the selection of the minimum .mov occurs. In this case, the voltage drop corresponding to the process minimum moment is removed from the zero output of the trigger (position "2 switch 76"). If the process being studied does not change, then block 6 will not generate pulses.

After the synchronizer develops a number of pulses equal to a given sample size, it stops its operation. As a result, information on the density distribution of maxima or minima of the process is accumulated in a multichannel register.

In the analysis mode of maxima (minimums), switches 7a and 76 are in

position "3 (" 4). For definiteness, let us assume that the distribution density of maxima is investigated (the switches are in position "3" and the signal increases monotonically. At each step of the device operation, the current value of the process recorded in the ADC is compared with the previous value stored in register 4. In this case, the ADC code is greater than when the register and block 6 outputs a sequence of pulses through the "+" bus that allow code overwrites from ADC to register. At the moment of reaching the local extremum, i.e., after the signal begins to decrease, the current

The ADC code value will become less when register. In this case, the pulses through the bus "-f" will not be output, and the new information from the ADC will not be copied to the register, in which the value of the first maximum will remain. The AND 3 block of elements will open again only when the current code value in the ADC exceeds the register code, and the new information is overwritten into the register, etc. At the end of the measurement interval, the code corresponding to the maximum process will be stored in the register. By a signal from the fourth output of the synchronizer defining the measurement interval, this value is recorded by a multichannel recorder 5. The process minima are measured similarly (the switches are in the "4" position).

After the synchronizer has developed the required number of intervals, it stops its work. As a result, the multichannel recorder accumulates information about the density of the distribution of the maxima or miniums of the process under investigation at specified time intervals.

Claims (1)

Invention Formula A statistical analyzer containing a synchronizer, an analog-to-digital converter, the first output of which is connected to the input of the statistical analyzer, and the second input to the first output of the synchronizer, the block of elements "And, the bit inputs of which are connected to the bit outputs of the analog-digital converter, a register whose inputs are connected to the bit outputs of the block of elements" And, multi-channel recorder, inputs which are connected to the outputs of the register, characterized in that, in order to increase the accuracy of the analyzer, it additionally contains a code comparison unit, the first group of inputs of which is connected with the bit outputs of the analog-digital converter, the second group of inputs with the register outputs, and the input with the second the synchronizer output, the trigger, the inputs of which are connected to the outputs of the code comparison block, the first switch, the output of which is connected to the block input by the element "AND, the first and second inputs to the third synchronizer output, and the third and fourth the inputs to the trigger inputs, and the second switch, the output of which is connected to the control input of the multichannel recorder, the first and second inputs to the outputs trigger, and the third and fourth inputs - to the fourth output of the synchronizer.