SU1303942A1 - Correlation meter of image motion velocity - Google Patents

Abstract

This invention relates to a measurement technique. The purpose of the invention is to simplify the design of the device with charge coupling and obtain the required slope of the difference characteristic. The rates of advancement of charge packets in linear devices with charge coupling (CCD) 3 and 4 are proportional to the frequency of the shear pulses at the outputs of the controlled dividers 17 and 18. The frequency of the shear pulses at the inputs of the linear CCD 3 and 4 is determined by the generator 15. The difference ratio the frequency of the shearing pulses at the inputs of the linear CCD 3 and 4 determines the steepness of the difference characteristic in the equilibrium region. This ratio is determined by the appropriate choice of the division factors of the controlled dividers 17 and 18. 1 Il. S (L with about with with 4 to W / 77 / ZW / W,

Description

The invention relates to a measuring technique and can be used to measure the speed of movement of an image of a medium in various automation devices.

The purpose of the invention is to simplify the design of the device with charge coupling and to obtain the required slope of the difference characteristic of the meter.

The drawing shows a correlation motion velocity meter.

The correlation motion speed meter contains a lens 1 through which the optical image of the target surface 2 is projected onto the photosensitive surfaces of linear devices with charge coupling (CCD) 3 and 4 located along the line of motion of the image. Linear CCDs 3 and 4 are the same and consist of N elements. They are designed to convert the light flux from the image of the desired surface into an electrical signal. The nominal element with the number n has a tap (). The number of this element determines the light sensitivity of the proposed meter. The tap does not violate the integrity of the charge package. Through amplifier 5 reproduction, it is connected to the input of the subtractor. The output of the linear CCD 3 is also connected via a playback amplifier 6 to the second input of the subtracting unit 7. The output of the subtraction unit 7 is connected to the input of the integrating amplifier 8. A circuit comprising a linear CCD 4, playback amplifiers 9 and 10, the second subtractive unit 11 and the second integrating amplifier 12 are similarly executed. The outputs of both integrated amplifiers are connected to the inputs of the third subtraction unit 13, the output of which in turn, is connected in series to the extreme controller 14 and the generator-15 shift pulses. One of the outputs of the generator 15 is connected to the input of the speed recorder 16, the second to the clock inputs of two of the same type of controlled frequency dividers 17 and 18. The corresponding outputs of the controlled dividers 17 and 18 are connected to the control inputs of the linear CCD 3 and 4. The speed recorder 16 is designed to determine the frequency of operation

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nerator 15 magnitude of the speed of movement of the optical image.

The correlation motion speed meter of the image works as follows.

The image of the surface 2 under consideration is projected by lens 1 onto the photosensitive surfaces of linear CCDs 3 and 4. The direction of motion of the image in the focal plane of the lens coincides with the direction of motion of the charge packets in the linear CCD. It is obvious that at the outputs of linear devices with charge coupling, the signal will be maximal if the rate of advance of charge packets is equal to the speed of image movement along the photosensitive surface of the linear CCD.

The speeds of advancement of charge packets in linear CCDs 3 and 4 are proportional to the frequencies of the shifting pulses at the outputs of the controlled dividers 17 and 18. By appropriately selecting the division factors of these dividers, and consequently, by choosing the frequencies of the shifting pulses at their outputs, you can set the required motion speeds of the image, which cause the maximum signal at the outputs of devices with charge coupling. Suppose that the control input of the linear CCD 3 from the output of the controlled divider 17 receives shift pulses with a higher frequency than the corresponding input of the CCD 4. This means that the optimal image speed for the linear CCD 3 will be greater than for the CCD 4 The frequency of the shear pulses at the inputs of the linear CCD 3 and 4 is determined by the oscillator 15. This frequency is chosen such that the mismatch between the speed of movement and the rate of advance of the charging packets is the same for both processing channels.

As the speed of the image increases, due to high-speed lubrication of the voltage at the output and output of the linear CCD 4, they will differ less from each other and the amplitude of the noise-like signal at the output of the second subtraction unit 11 will decrease. At the same time, the high-speed lubrication of the linear CCD 3 will decrease, the output voltage will increase and be more different from the voltage at the tap, while the amplitude of the signal at the output will be in the pattern in the field. This is then tiTfcoiiieHHC Hf sn thru with special trioopoints for KOEtcrructive features of the applied 13C linear, and is determined by the appropriate choice of the division factors of the controlled divisors.

31303942

ka 7 subtraction If you decrease the speed of movement on the frost, everything will be the opposite. The amplitude of the signal at the output of the subtracting unit 11 will increase, and at the output of the subtracting unit 7 will decrease.

Integrating amplifiers 8 and 12 average and amplify noise-like discrete signals to a certain extent.

Claims (1)

signals coming to their inputs. The formula invented and the equality of the mismatch in the speed of movement of the optical image along the photosensitive layers of devices 3 and 4 with charge coupling and speed of advance of their charge pa- ratory along the direction of movement of the kets, select the appropriate gain factor to achieve photosensitivity gains moreover, the outputs of the integrating services of ti-8s and 12 are equal in magnitude 20 The correlator is a digital video speed meter, containing a lens, in the focal plane of the cosignals. After subtracting these signals in the third subtracting unit 13, there is no signal at its output. By increasing or decreasing the speed of the image at the output of one of the integrating amplifiers, the signal will increase, while at the output of the other will decrease. Consequently, at the output of the subtraction unit, the voltage in this case will differ from zero. Accordingly, the extreme controller 14 will cause a change in the operating frequency of the oscillator 15 of the shifting pulses so that the signal at the output of the third subtraction unit 13 goes to zero. Controlled dividers 17 and 18 can be made based on the use of chips with variable coefficients. A charge coupled device, the intermediate and main outputs of which are connected via the first and second playback amplifiers to the inputs of the first subtraction unit, the output of which is connected to the input of the first integrating amplifier, and the outputs of the third and fourth playback amplifiers, the output of which connected via the second integrating amplifier to the first input of the third subtraction unit, to the second input of which the output of the first integrating amplifier is connected, and the output of the third subtracting unit through extreme controller connected to the control input of oscillator 35 sdvigayu- boiling pulses, whose output is connected to the recorder speed of T30 To simplify the design of the device with charge coupling and to obtain the dividing type of type 155IE8 or the required slope of the difference characteristic with the use of another meter gauge, two controllable time dividers are added to it in addition to the known technical solutions - level frequency dividers with variable tota and located parallel to the per-division factor and to the second light similar to it. Entering into a differential corrective device with a charging lation image speed meter In the view, the intermediate and main extrusion of the additional controlled outputs of which are connected to the corresponding frequencies allowed to simplify significantly to the inputs of the third and fourth devices by eliminating the hard reproduction amplifiers, and the control requirement for the special selection the inputs of the first and second light-sensitive linear CCDs. In sensitive devices with air to the proposed meter, the difference in the frequency of the shift pulses at the inputs of the same linear CCD 3 and 4, and the point / 55 by means of appropriate controlled frequency dividers are combined at the output of the shift pulse generator. VNIIPI Order 1303/45 Circulation 777 Random polygons pr-tie, Uzhgorod, st. Project, 4 Diverse races in the field. "Equal power. This is then tiTfcoiiieHHC Hfnr of units with special trioopoints for KOEtcrr-ructive features of the applied 13C linear, and is determined by the appropriate choice of the division factors of the controlled dividers. The formula is invented and a photosensitive is installed along the direction of the image movement. Correlation is the cytometer image speed meter, which contains the lens, in the focal plane of the formula invented and installed along the image movement direction A charge coupled device, the intermediate and main outputs of which are connected via the first and second playback amplifiers to the inputs of the first subtraction unit, the output of which is connected to the input of the first integrating amplifier, and the outputs of the third and fourth playback amplifiers, the output of which connected via the second integrating amplifier to the first input of the third subtraction unit, to the second input of which the output of the first integrating amplifier is connected, and the output of the third subtracting unit through extreme controller connected to the control input of the pulse generator sdvigayu- boiling whose output is connected to the speed registrar, of t sensing device with charge coupling, the intermediate and main outputs of which are connected respectively to the inputs of the third and fourth playback amplifiers, and the control inputs of the first and second light devices with air by means of appropriate controlled frequency dividers are combined at the output of the shift pulse generator. Subscription