RU2098769C1 - Method for formation of united time scale - Google Patents

Abstract

FIELD: optical instrumentation engineering. SUBSTANCE: mark signal is formed and supplied to recorders of examined process parameters by photoelectric conversion of light signal at slot outlet when light beam passes through slot. In addition, N-1 slots are made with their preset location relative to one another which prevents for generation of pseudorandom mark signals within the whole time of recording the examined process parameters. N-1 mark signals are formed by scanning with light beam and at known speed over surface in which slots are made. Each of N-1 mark signals which is related to corresponding slots is supplied to all recorders of process parameters. Time intervals between recorded pseudorandom mark signals are determined by relation of spaces between respective slots to speed of light beam scanning over surface in which slots are made. EFFECT: higher efficiency. 2 dwg

Description

 The invention relates to measuring equipment, as well as to optical instrumentation.

 The invention can most effectively be used to create a single timeline in the study of the dynamics of fast processes.

 A known method of recording changes in luminous flux, which further integrate the light signal and compare it with the reference signal (SU, AS No. 1582009, G 01 D 5/12, 1982).

 The disadvantage of this method is the impossibility of its use when registering heterogeneous parameters, for example, electrical and optical.

 There is also a method of identifying points in time to create a single timeline for parallel registration of the parameters of one or more processes, which is the closest in technical essence (SU, AS No. 1732156, G 01 D 9/28, 1989).

 In this method, the studied light signal is deployed in time, a slit is cut out within the frame window of the photorecorder, and identification signals are formed by the photoelectric method when photorecording in the area of the mark affixed by an external light pulse before the photoregistration begins.

 A disadvantage of the method for identifying time instants during parallel registration of the parameters of one or several processes is that the studied parameters are identified only at time instants when all parameters are recorded simultaneously and it is impossible to identify parameters in time whose registration is not time-aligned. It is necessary to have time to develop an identification signal during registration in the area of the mark affixed by an external light signal, i.e. There must be a strict temporal attachment for the development of the identification signal and the photo-registration process.

 An object of the invention is the expansion of the possibilities of constructing a single timeline with the registration of the parameters of the process (processes) not combined in time.

 The technical result is achieved by the fact that N-1 slots are additionally performed with a predetermined location relative to each other, providing pseudorandom tag signals throughout the entire time of registration of the parameters of the process under study, and N-1 tag signals are generated by scanning with a light beam at a known speed on the surface , in which the slots are made, each of the N-1 label signals is supplied to all the recorders, the time intervals between the registered pseudo-random label signals are determined and with respect to the distances between the respective slots and the scanning speed of the light beam over the surface in which the slots are made.

 Figure 1 respectively shows: 1 source of a constant light signal; 2 rotating mirror; 3 plane of cracks; 4 optical fibers; 5 - photodetector; 6.7 registrars of the studied parameters; 8 investigated object.

An example implementation of the method. On the focal plane of an ultra-fast photographic recorder (SFR), on which three slots are applied across distances S ₁ 1 cm, S ₂ 2 cm, are scanned by a light signal and a speed of 10 ⁶ m / s. Identification marks at the moments of passage of the light beam through the slots are created by the fact that the light signal is sent through the fiber to the photomodule of the PMT. At the same time, in t ₁ S ₁ / V 10 ^-8 s, t ₂ S ₂ / V 2 • 10 ^-8 s, identification signals are generated that are fed to oscilloscopes that record current and voltage. To identify the values of current and voltage, the marking signals appearing on the oscilloscope screen are correlated with the corresponding slots and thereby determine the time intervals between the marking signals.

где V_ск скорость сканирования светового луча по плоскости щелей. В данном случае:

Пример конкретного выполнения поясняется на фиг.2. Здесь а плоскость щелей, б осциллограф, регистрирующий ток, на нижнем луче идентификационные сигналы от щелей 1 и 2, в осциллограф, регистрирующий напряжение, на нижнем луче которого идентификационная метка от щели 3.In order to identify the process parameters in time, in our case, the current and voltage, the registration of which is not time-aligned, ensure that the total recording time is less than the time of scanning the light beam along the plane of the slits:

where V _{ck is} the scanning speed of the light beam along the plane of the slits. In this case:

An example of a specific implementation is illustrated in figure 2. Here, a is the plane of the slots, b the oscilloscope that records the current, on the lower beam the identification signals from slots 1 and 2, the oscilloscope that records the voltage, on the lower beam of which the identification mark from the gap 3.

 The way to create a single timeline in comparison with the known ones allows you to expand the ability to build a single timeline in the study of parameters, the registration of which is not combined in time.

 The method also allows to increase the accuracy of identification of time instants during joint registration of non-uniform process parameters, for example, electrical and optical.

Claims (1)

 The method of creating a single timeline, which consists in generating a tag signal and feeding it to the parameters of the process under study by photoelectric conversion of the light signal at the output of the slit at the time of passage of the light beam through the slit, characterized in that N 1 slots are additionally performed with a predetermined location relative to each other friend, providing receiving pseudo-random label signals throughout the recording time of the parameters of the investigated process, and N 1 label signals form by scanning with a light beam at a known speed along the surface in which the slots are made, each of the N 1 mark signals that correspond to the corresponding slots is fed to all process parameter recorders, the time intervals between the registered pseudo-random mark signals are determined according to the distance between the corresponding slots to the scanning speed of the light beam over the surface in which the slots are made.

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