SU789757A1 - Oscillograph curve identification method - Google Patents

Description

The invention relates to instrumentation and can be used in recording techniques, such as light beam oscilloscopes. A known method for the identification of wasps, a cylindrical curve recorded by a galvanometer, is that the light beam incident on the galvanometers is periodically blocked by flags fixed on the movable endless belt of the chopper and form a break in the recording line .1). The disadvantage of this method is the inconvenience of determining the serial number of the recording channel during the interpretation of oscillograms with a large number of intersecting signals (their curves). Furthermore, the need to ensure synchronous movement of the drive shaft and the chopper belt leads to the introduction of special mechanical transmissions noise and vibrations in the working mode. There is also known a method for identifying an oscillographic curve recorded by a galvanometer, based on the interruption of the beam The vanometer and the imprint of the symbol 2. The main disadvantage of this method is the need to introduce a special optical system to illuminate sections of the film with images of symbols. The large optical lever of this system causes the registration or replacement of the lamp (the lifetime of which is only 100 hours) may cause an offset of the spot on the film, requiring adjustment of the optical elements of the system. In addition, it is necessary to ensure synchronous movement not only of the leading of the shaft and the chopper belt, but also with the film reel that. even more saturates the oscilloscope with complex mechanical components and reduces the reliability of the device as a whole. The disadvantages of this method include the circumstance that most often the breaks in the recording lines and the symbols denoting the numbers of the registration channels are sufficiently distant from each other, which causes certain difficulties in interpreting oscillation / ugrams containing a large number of

intersecting curves of various shapes and amplitudes and reduces the productivity of the operator.

The purpose of the invention is to increase the reliability and simplify the interpretation of waveforms,

This goal is achieved by the method of identifying an oscillographic curve based on interrupting a galvanometer beam and typing a symbol, the signal under investigation is periodically disconnected from: a galvanometer and simultaneously inserted into the memory, and the galvanometer is connected to the memory and signal of the corresponding symbol.

An example implementation of the method shown in the drawing, which denotes 1,2 and 3 - sensors / investigated physical quantities; 4-channel analog switch; 5,6 and 7 oscillographic galvanometers; 8 - control unit; 9 - block of the task of the character; 10 - analog memory device; 11 - multichannel analog switch.

To simplify the drawing and the description of the method, the case of using three galvanometers that record changes in the parameters of three processes is considered.

Sensors 1, 2, and 3 convert changes in various physical quantities x the characteristic state of the object under study into electrical signals. Using a multichannel analog switch 4, these signals are fed to oscillographic galvanometers 5, b, and 7, respectively, which convert them into light beam deflections, which fix instantaneous values of the recorded parameters on the movable recording medium.

The control unit 8 periodically generates commands that are set; the operation mode of the switch 4 and block 9 of the task of the symbol.

When a command from block 8 arrives, switch 4 is sequential, running from the first one, disconnects galvanometers 5, 6 and 7 from sensors 1, 2, and 3 and injects instantaneous values of its signals into the corresponding cells of device 10 of analog memory.

At the moment of storing the amplitudes of the signal of the first channel, the switch 4 (Triggers another multichannel analog switch 11. Switch 11 samples the recorded values of the recorded signals and their connection to the corresponding galvanometers, which are recorded in the cell of the device 10. 10 analog

Memories prepare for operation the block 9 of specifying a symbol, from the output of which signals are sent to the galvanometers through the switch -11 for putting the corresponding symbols. Thus, the switch 11 sequentially provides each galvanometer with the instantaneous value of the recorded signal (equal to the product of the value (of the recorded signal at the moment when the switch 4 disconnects the signal from the galvanometer to the transmission coefficient of the analog memory device 10.) Serial pulses, by which the galvanometers themselves reproduce the symbols on the secondary recording medium.

At the end of the sampling of the instantaneous value of the recorded parameter of the last channel (for this case, the 3rd), the control unit 8 forms a command from the switch 11 signal and the switch 4 again connects the sensors to the corresponding galvanometers. At the same time, control block 8 begins counting the cycle time, after which the process described above repeats.

It should be noted that practically any information can be applied to the cyclogram, at the point of breaking the recording line. The implementation of this method makes it possible to replace a whole number of optical-mechanical units of a light-beam oscilloscope with electronic ones made on the basis of an integrated technology, which significantly increases its reliability. The addition of service and measurement information directly at the break of the recording line simplifies the process of deciphering the oscillograms and increases the productivity of the operator.

The formula of the invention

A method for the identification of an oscillographic curve based on the interruption of a galvanometer beam and. imprinted

The scientific research institutes of the symbol differ in that, in order to increase reliability and simplify decoding of the oscillographic Mjvi, the signal under investigation is periodically disconnected from the galvanometer and simultaneously inserted into the memory, and the galvanometer is connected to the memory and signal of the corresponding symbol.

Sources of information taken into account in the examination 1. US Patent 2635034, cl. 346-109, 1956.

2. Patent number 3081458, Cl, 346g45, 1963.

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Claims (1)

Claim A method for identifying an oscillographic curve based on interrupting a galvanometer beam and imprinting a symbol, characterized in that, in order to increase reliability and simplify the interpretation of oscillograms, the signal under investigation is periodically disconnected from the galvanometer and simultaneously entered into the memory, and the galvanometer is connected to the memory and the signal of the corresponding character.