SU1287183A1 - Device for determining extrema - Google Patents

Abstract

The invention relates to the field of automation and computer technology and can be used in the implementation of technical means for the selection of local extrema from a set of consecutive numbers. The purpose of the invention is to expand the functionality of the device by providing an indication of the type of extremum. The operation of the device consists in fixing the moment of changing the sign of the increment of the function entering the device input. The device contains adder 1, registers 2, 4 of the current and extreme values, switch 3, trigger 5, delay element 12, AND element 7, OR element 9, OR element - NOT 8. The device can be used to obtain correlation and spectral characteristics by the average number of extremes of the random process, as well as in signal processing in location and navigation systems as a measure of the primary parameters output signals of digital filters, correlators and spatial adaptive devices, the information from which is received sequentially in time. 1 il. (L with

Description

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The invention relates to automation and computing technology and can be used in the implementation of technical means for distinguishing local extrema from a set of consecutive numbers.

The purpose of the invention is to expand the functionality of the device by providing an indication of the type of extremum.

The drawing shows a structural diagram of the proposed device. ; The device for determining extremums contains adder 1, register 2 of the current value, switch 3, register 4 of extreme values, trigger 5, information input 6, elements AND 7, OR-NOT 8, OR 9, first 10 and second 11 display outputs, element 12 delays.

The device works as follows

In the initial state, the value of the function F, C is sent to registers 2 and 4. At the input of the device, there are s, the increments of the function & F F {- F ;, (i 1, 2, ...). At the output of the trigger 5 in the first cycle of operation there is a signal Uf, opposite to the sign of the increment Uj / function (Uj, sign 4f). At the outputs of elements 7-8, the zero level, because the element And 7 performs the logical function ft Uj U

element OR NOT 8 - f,

element OR 9-11, f

 and. v u.

2 Ut

and ua

i g When changing the sign of the increment

Ui / and a signal is generated, which arrives at vhrd switch 3 and allows the issuance of the current value of the function + & F (formed in the adder 1 and recorded in the register 2) in the register 4 of extreme values. The same signal switches the trigger 5 to the opposite state.

At output 10, a signal appears if Uj / Uj when determining the local maximum (an increment of

D F - signal one

50

trigger input and in

Compiled by V.Orlov Editor S.Lisina Tehred I.Popovich Proofreader N.Korol

NONNOGS level). At output 11, a single level signal appears when the sign F is switched from negative to positive (sign OF 0), which indicates the presence in register 4 of an extreme local minimum value.

Thus, the proposed device provides the determination of local extremes, functions, which allows it to be used to obtain correlation and spectral characteristics based on the average number of extremes of a random process.

Claims (1)

Invention Formula 0 five 0 A device for determining extrema containing a current value register, an extreme value register, an adder, a trigger, a switch, the first input of the adder is an information input of the device, the output of an adder is connected to an information input of a register of the current value text, the output of which is connected to the second input of the adder and with the information input of the switch, the control of which is connected to the counting input of the trigger, and the output to the input of the register of the extreme value that differs from the fact that, in order to expand and functionality at the expense of 5 to provide an indication of the extremum type, an indication block is inserted into it, containing the element AND, the element OR NOT. gate and delay elements, and the output of the delay element is connected to the first inputs of the AND and OR-NOT elements, the outputs of which are connected to the first and second inputs of the shsh element, respectively, and are the output indications of the device maximum and minimum, the input of the delay element, the output of the OR element and the second inputs of the AND and OR-NOT elements of the display unit are connected respectively to the first input of the adder, the counting 50 trigger input and trigger output.