SU1377604A1 - Method of measuring light intensity - Google Patents

Abstract

The invention relates to the field of measurement technology and can be used in computing technology in the implementation of operational storage devices. The invention cushion is to improve the accuracy by quantizing the image at levels that characterize individual values of image slice intensity and expanding the scope by storing individual values of intensity.

Description

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image slices. The optical signal 1 is converted into the corresponding duration of the time interval, the duration of the time interval in the memory blocks 4 is memorized, the external control signals 5 are alternately transferred to each memory block 4, and the display is recorded. At the end of the durations of all time intervals: control intervals

the output signal supplied from the OR-NOT 6 element is read the contents of each memory block through the AND 7 element into the adders 8, divide the result obtained in each adder 8 by the number of elements of the group of photo-receivers 2, the values obtained are in the common adder 10, the result is a value of the light intensity, 3 Il.

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The invention relates to a measurement technique and can be used in computer technology in the implementation of random access memory devices.

The purpose of the invention is to improve the accuracy and expand the scope of application of the method.

Fig. 1 shows a block diagram of a device implementing the proposed method for measuring the intensity of light in Fig. 2, a diagram of several bits of a memory block; Fig. 3 is a block diagram of a totalizer for measuring the contents of a memory block.

A device for measuring the intensity of the luminous flux 1 contains, pxp. Photo-receiver 2, a matrix 3 f of converter elements pxp, m memory blocks 4, each of which consists of n memory elements, bus 5 external control signals, element OR-NOT 6, elements AND 7 adders B, block 9 division and total adder 10,

The multiple bit pattern of the memory unit (FIG. 2) contains the first 11 and second 12 LEDs, the first 13 and second 14 photo thyristors, and the control bus 5, the Totalizer circuit for measuring the contents of the memory block (FIG. 3) contains n threshold elec - cops 15 with n inputs 16, elements NOT-AND 17, n generators 18, element OR 19 and counter 20,

The measurement of the light intensity is carried out as follows.

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Voltage O is applied to one of the terminals of the control bus 5, and voltage 1 is sent to the other output. Light flux 1 is supplied to the elements of the photodetector group 2, the magnitude of the optical signal supplied to each photosensitive element is transformed into time intervals the use of a matrix of 3 elements of the php converter. The durations of the time intervals from the matrix element 3 are written to the first elements of the memory block 4. Alternately, they are applied to the outputs of the control bus 5 of the voltage O and 1 and they rewrite the durations of the time intervals recorded in the current kth memory block 4 into the subsequent (k + 1) s by the optical signal from the previous one. k-ro memory block for subsequent (k + l) -t,

If there is a control signal at the output of bus 5 connected to the second photoristor 14, it is overwritten from LED 11 to photo-thyristor 4, which causes LED 12 to be energized. When subsequent control signals appear at the terminals of bus 5, LEDs are alternately excited 11 and 12. Upon completion of the recording of pulses of all optical signals from the matrix of 3 converter elements, voltage 1 is generated at the output of the element ILY-HE 6, which permits reading of the contents of each memory block 4 through element 7 of howling adder 8

The adder 8 operates as follows. The threshold elements 15 containing n inputs 16, and the threshold elements 15 are constructed in such a way that the first threshold element opens, if one voltage is applied to the n inputs 1, the remaining threshold elements are locked, if the inputs n are fed two voltages 1 will open the second threshold element. The last threshold element will open if all voltage inputs are present at all p inputs 16 and voltage 1, the signals from the output elements of the threshold elements 15 arrive at the first direct input of the elements NE-17, Since the second inverse input of the elements 17 is connected to the output of the subsequent element 15 only one element is NOT-AND 17, corresponding to the maximum number of voltages 1 at the inputs of 16 threshold elements 15, which allows operation in a single-position code. Generators 18 are tuned in such a way that the first generates pulses with a frequency f, the second with a frequency of 2 f, the nth generator with a frequency of nf. Depending

from what element NOT 17th opened Dy Dy block of memory and rewrite it, the corresponding will work

time intervals recorded in the previous kth memory block to the next (k + 1) st memory block by applying an optical signal from each previous k-ro memory block to the next (k + l) th, - the contents of each memory block are divided and the result is divided by the number of elements of the photodetector group, the received intensities determine the intensities of individual image slices, and the measured light intensity is determined by summing the intensities obtained.

generator 18, the pulses of which will arrive at the element OR 19 and in its turn, at the input of the counter 20, in which the intermediate result of the counting of pulses is recorded. The obtained counting results in each adder 8 are divided by the number of elements of the photodetector group 2 by means of dividing unit 9, obtaining the sveua intensity values read from each memory unit 4, and the resulting light intensities are summed up in a total of 10 meters.

The present invention allows to improve the measurement accuracy due to the visual display and readability of the light intensity values of image slices, which provides measurement of the light intensity, varying in image luminance, and also expand the application area by storing individual values of image slice intensities, for example, as operational storage devices. F o r ,, m ula invention

A method for measuring the intensity of light based on discretization of the luminous flux of phn photodetectors, separating the output signals of a group of photodetectors, parallel to transforming them into durations of time

intervals,

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By the fact that, in order to increase the accuracy and expand its area of use, memorize the durations of time intervals in the kth of m memory blocks, each of which consists of n memory elements, external control signals are sent alternately to each Dy memory block. ty and rewrite dpi

the time intervals recorded in the previous k-th memory block, to the next (k + 1) -th memory block by applying an optical signal from each previous k-ro memory block to the next (k + l) -th, count - the contents of each memory block are divided and the result is divided by the number of elements of the photodetector group, the received intensities determine the intensities of individual image slices, and the measured light intensity is determined by summing the intensities obtained.

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Claims (1)

A method for measuring light intensity based on sampling the luminous flux of a PCP by photodetectors, isolating the output signals of a group of photodetectors, parallel converting them into lengths of time intervals, characterized in that, in order to increase accuracy and expand the scope of its application, the durations of time intervals are stored in kth of w memory blocks, each of which consists of n ^and memory elements, external control signals are supplied alternately to each memory block and the time and the intervals recorded in the previous k-th memory block to the next (k + 1) th memory block by reading the optical signal from each previous k-th memory block to the subsequent (k + 1) th memory block, read the contents of each memory block and divide the result by the number of elements of the group of photodetectors, according to the received signals, determine the intensities of individual sections of the image, and the measured light intensity is determined by summing the obtained intensities.