SU1319055A1 - Device for counting particles - Google Patents

Abstract

The invention of television automation is for counting the number of small objects. The aim of the invention is to improve the accuracy. The device comprises a clock generator, a television sensor, a pulse shaper, a pulse generator, a key and a counter, a control unit and a D-flip-flop. The control unit contains a counter 10, a decoder 11, a switch 12, an OR 13 element, and a key 14. 1 cp ff, 3 sg. t FIG. 2 2 t «CO eaten 01

Description

The invention relates to television automation, to devices for counting the number of small objects.

The purpose of the invention is to improve the accuracy of the device by taking into account the average amount of overlapping images of objects on the indicator screen and pseudo-signals, which are of half the duration, from their coincidence with the ends of the chord signals.

Comrades located on the TV raster line, then, in accordance with the pulse duration, form one or a burst of short pulses - pseudo-signals of objects, which it counts and their sum outputs to the device output as the number of objects monitored by the television sensor.

Before counting the number of objects, the device is set up with visual control in FIG. 1 is given a block diagram of the proposed lem according to the marks on the screen of the indicator 1.

first device; in fig. 2 is a control block diagram; in fig. 3 - timing diagrams for the operation of the device. The device contains an indicator 1, a television sensor 2, a driver 3 IMD it, on the indicator screen choose the largest group, which is formed by n objects located along the television line, and fix on it the marks - bright dots, in the amount equal to

pulses, 4 pulse generator, block 5 pack-5 number of objects (Fig. 3, diagram 1). Directions, key 6, counter 7, generator 8Tags are positioned so that the first condition t.ti before the second mark and the second condition tj- (ti-bsr) after the second mark are observed in the device. The position of the 2Q marks on the frame is set automatically, based on the first condition.

The device works as follows. The video signal of objects from the output of the television sensor 2 is fed to the input of the imaging unit 3 pulses. At the output to the driver 3, and the input for setting the period of the rotator 25, the signal contains pulses (Fig. 3, the following pulses at the generator output, diagram 2), the duration of which is connected to the control unit.

Generator 4 can be performed on a multiplexer with an R input.

A pulse shaper 3 (not shown) contains an amplitude limiting amplifier in amplitude, the output of which is connected to the input of the OR element, the output of which is a high-speed pulse and a D-flip-flop 9.

The control unit 5 contains the counter 10, the decoder 11, the switch 12, the element OR 13, the key 14.

The generator 4 is made according to the scheme of the waiting generator of short pulses, the period of which can be smoothly varied. The generator has a control input for starting the generator, connected to the form of the value of the chords of single or groups of objects. When taking into account the coincidence of tn with the second edge of the pulse (figure 2).

Under the influence of pulses from the output of the imaging unit 3, the generator 4 from the standby mode switches to the mode of generating a single or a burst of short pulses — pseudo-signals of objects (Fig. 3, diagram 3). The pulses of the generator 4 arriving at

pulse generator stroke, the first and second inputs of which are the inputs

the amplifier limiter and the second input ele. ..-

ment or. The OR element increases the length 35 of the output of the key 6, are countable for the counting of the output pulses of the former 7 and the signal of the marks that mark the counting objects on the indicator screen 1. After the end of the pulse of the television sensor 2, the outputs of the imager 3 and

bodies on the duration of the pulse generator 4, when the latter coincides with the second front signal at the output of the amplifier-limiter. This eliminates half of the 40 generator 4 pulses disappear. The output of the generation duration pulses from the device is carried out with a support of 4 and increases the accuracy of counting the number of particles.

step on the control input of the counter 7 pulses of the frame synchronization of the generator 8.

Switch 12 contains the first switch, the input contacts of the first group of which are connected to the outputs of a voltage divider (for example, on resistors), the input contacts of the second group are connected to the outputs of the decoder I, the output contact of the first group of contacts is connected to the input of the main supply the control input of the counter 7 pulses of frame synchronization of the generator 8.

The control unit 5 generates signals that control the operation mode of the generator 4 and the key 6. The control signal, which arrives at the input of the generator 4, sets the period for following the pulses at the output of the generator. The control voltage for fortor 4 and output k.; 1 is 14, and output pulse 50 with a period of tr sets the contact of the second group of contacts to the input of the element OR 13 and the second switch, the input contacts of which are connected to the outputs of the additional resistive splitter and the output contact - with the first input key 14.

The device generates pulses, the duration of which is proportional to the chord size of single objects and groups of obex by a divider through the output of the first switch of block 5, and with a period of tr - dividers in parallel through the outputs of the first and second switches of switch 12. The output of the second switch 55 the D-flip-flop signals 9. The D-flip-flop is controlled by short pulses of the generator 4 and pulses from the output of the imaging unit 3 (Fig. 3, diagrams located on the line of the television raster, then in accordance with A pulse with a pulse duration forms one or a batch of short pulses - pseudo-signals of objects, which it calculates and their sum displays at the output of the device, as the number of objects monitored by a television sensor.

Before counting the number of objects, the device is set up with visual control by marks on the screen of the indicator 1.

Lem by marks on the screen. Indicator 1.

To do this, on the screen of the indicator, select the largest group, which is formed by n objects located along the television line, and fix marks on it - bright points, in an amount equal to

the number of objects (Fig. 3, diagram 1). Labels are arranged so that the device device operates as follows. The video signal of objects from the output of the television sensor 2 is fed to the input of the imaging unit 3 pulses. At the output of the imager, the signal contains pulses (Fig. 3, diagram 2), the duration of which is

is proportional to the size of the chords of single or groups of objects. When taking into account the coincidence of tn with the second edge of the pulse (figure 2).

Under the influence of pulses from the output of the imaging unit 3, the generator 4 from the standby mode switches to the mode of generating a single or a burst of short pulses — pseudo-signals of objects (Fig. 3, diagram 3). The pulses of the generator 4 arriving at

, ..-

the output of the key 6 is countable for the counter 7 and the signal of the marks that mark the counting objects on the indicator screen 1. After the end of the pulse of the television sensor 2 at the outputs of the driver 3 and

generator 4 pulses disappear. The output of data from the device is carried out at

step on the control input of the counter 7 pulses of the frame synchronization of the generator 8.

The control unit 5 generates signals that control the operation mode of the generator 4 and the key 6. The control signal, which arrives at the input of the generator 4, sets the period for following the pulses at the output of the generator. The control voltage for shaping pulses with a period of tr is set by a divider through the output of the first switch of block 5, and with a period of tr - by dividers in parallel through the outputs of the first and second switches of switch 12. The output of the second switch is connected to the output of the first by key 14 via D-trigger signals 9 The D-flip-flop is controlled by short pulses of generator 4 and pulses from the output of driver 3 (Fig. 3, diagrams 2 and 3), forming at its output a sum of two signals that coincide in shape (Fig. 3, diagram 4). The first signal, low potential, is formed to hold key 14 in the closed state.

groin and structures in the field of view of a television sensor.

The proposed device additionally provides the ability to determine the degree of concentration of objects by taking into account

and the second signal, a strobe with a high potential of the groups formed by superimposed dials, is formed to hold the key against each other objects, the size of the square in the open state, and also for

di, which occupy all observed objects.

identifying the number of groups that contain two or more objects.

At the output of the D-flip-flop, the duration of the first signal, and the second, depends on the structure of the objects along the television line. At the same time, the first front of gates in all cases of formidi, which is occupied by all observed objects.

Claims (2)

1. A particle counting device containing a sync pulse generator, the first output of which is connected to the first indicator input and to the television datalogue, so the set of gates is the number, the output of which is connected to the second input of groups of objects represented in the indicator house, block control, the first unit code. According to the number of strobes in FIG. 3 whose output is connected to the first input of such groups there are three. (, 2, 3). pulse generator, the output of which is connected to the control signal from block 5, is connected to the first key input, the second input is connected to the control one, the input of key b - 20 is connected to the second output of the block strobe sequence, which is control, and the output is to the first entry the counter, the second input of which and the first input of the control unit are combined and connected to the second output of the clock generator, the third output of which of the subgenerator is fed to the row input of the counter- 25 is connected to the second input of the control unit 10. The decoder 11 sequentially, different from that, in order to improve all the states of the counter to the selected accuracy of the device, it is entered The first switch of the switch is 12 D-flip-flop and pulse shaper, first. The input input of this type is connected to the output by a telepulse coincidence through the output of the switch and the vision sensor, the second input from the output element OR 13 is fed to the installer of the pulse generator 10, which connects the input of the counter 10 and converts it to to the C input of a D-flip-flop, the D-input of which is the zero state. In the zero state of the counter, the decoder 11 at the output b highlights the strobe, which opens the key 6. The strobe duration is equal to the period of following horizontal sync pulses, and the period of following the strobes - the value of the period between the same states of the counter 10. Frame sync pulses through the inputs 7 and 8 blocks, provide phasing of strobes on the frame.40 The invention can also be used to measure the area that all observable objects occupy. In this case, to increase the measurement accuracy, generator 4 is adjusted to the maximum the generation frequency, and the key 6 is constantly 45 digits, the input of which is connected to the second inlet for counting pulses. The home of the control unit, the third input of which connected to the first key entry, the second Compared with the known offer, the input of which is connected to the first output My device has an increased accuracy of the switch, the second input of which connects the number of objects due to the choice of time to the output of the key and to the first output The formation of the pseudo-signals of the object of the control unit, the second output of which is totaled by the account of their concentration in the group is connected to the output of the decoder. connected to the output of the pulse generator, which is connected to the second input of the pulse generator, the output of the D-flip-flop is connected to the third input of the control unit, the output of the key is connected to the third input of the indicator. 2. The device according to claim 1, characterized in that the control unit comprises a decoder, a switch, a key, an OR element and a counter, the output of which is connected through the serially connected decoder and switch to the first input of the OR element, the second input of which is connected to the first input of the control unit The output of the element OR is connected to the first input of the counter, in vopakh and the structure of the location in the field of view of the television sensor. The proposed device additionally provides the ability to determine the degree of concentration of objects by taking into account the number of groups formed by superimposed objects, the size of the number of groups formed by superimposed objects, the size of di, which occupy all observed objects. Invention Formula sensor, the second input - with the output of the pulse generator, which is connected to the C-input of the D-flip-flop, whose D-input A swarm whose input is connected to the second input of the control unit, the third input of which connected to the output of the pulse generator, which is connected to the second input of the pulse generator, the output of the D-flip-flop is connected to the third input of the control unit, the output of the key is connected to the third input of the indicator. 2. The device according to claim 1, characterized in that the control unit comprises a decoder, a switch, a key, an OR element and a counter, the output of which is connected through the serially connected decoder and switch to the first input of the OR element, the second input of which is connected to the first input of the control unit , the output of the element OR is connected to the first input of the counter, wto / 7 5 f P I I and P I. g Jt; l H 1 p-2 / 7 J Jl About P & L ij FIG. five