SU631829A1 - Unipolar pulsed electric signal registering device - Google Patents

Description

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The device relates to a measurement technique, for example, to a parameter of the parameter ABOUT rapidly determined processes.

Devices are known for registering parameters of fast deflection processes containing a primary transducer.

(pressure sensor, temperature, etc.), which transforms the measured physical quantity into an electrical signal, according to the results of the amplifier, also used to transmit an electrical signal with the smallest distortion, and a recorder, an electrical signal recorder (oscilloscope, magnetic drum, etc.). p.) in a synchronization device, which serves to turn on the recorder in the recording mode of the electrical signal ij.

The disadvantage of such devices is the high accuracy of registration of pulsed electrical signals.

The closest in terms of technology to isophetia is a pyrographic gyroplane ophiopolis (a range of an impulse electrical signal containing a serial connection of the primary

converter, matching amplifier, recorder and synchronization unit 21.

In such a device, the accuracy of recording an electrical signal is insufficient due to the change in the voltage of the studied signal at the time of measuring the voltage of the power sources to which the amplifier and recorder are connected, according to the voltage of the power sources at the time of the device; displacing the electrical noise of the recording band (under the register band, for example, in an oscilloscope, is meant a section on the screen, inside which there is no signal distortion, where the measured signal is recorded) in the area on the screen where nonlinear distortions are possible, which is very important when the registration band is shifted towards the signal recording; the recording amplitude of the signal in the recorder is insufficient because the field of the recording bandwidth is used to record the unipolar signal.

The aim of the invention is to increase the accuracy of registration of a unipolar pulsed electrical signal.

To achieve this goal, a sequentially connected step electric signal generator and a time delay unit are introduced into the proposed device. The output of the step electric signal generator is connected to the input of the matching amplifier, and the input of the time delay unit is connected to the output of the recorder.

The drawing is a structural diagram of iycTpoiScTBa.

The device is equipped with a primary transformer 1, a matching amplifier 2, a recorder 3, a synchronizing unit 4, a generator of a stepped electrical signal 5 and a unit of delay 6.

The output of the generator is connected to the input-to-element element of the matching amplifier so that at the amplifier output the polarity of the signal of the amplifier is the opposite of the polarity of the signal under study. The generator start input through the electronic time delay device is connected to the output of the synchronization device.

Usfo works as follows.

At the given time point, the synchronization unit 4 switches on the recorder 3 to record the signal coming from the output of amplifier 2 and turns on the zerder time block 6 after a specified period of time, for example, 1.5-2 times less than the time interval from the moment the recorder was turned on 3 in the recording mode until the beginning of the signal under study. The electronic delay device starts up the generator 5, the signal from which amplifies with the amplifier 2 and is recorded by the recorder. Then, the signal under investigation is recorded, and the flat top of the pulse from the generator serves as the zero line as the zero line when recording this signal. A pulse from a precision generator is used as a calibration. And since the moments of measurement and calibration are combined, the voltage fluctuations of the power sources are insignificant. The polarities of the caliphukmphego and the signal under study at the output of the amplifier are opposite, therefore it is possible to amplify the signal being studied within the entire recording band (not half), provided that the calibration signal occupies half the recording level band.,

The error due to the shift of the band of the recording level due to interference when the offset occurs in the recording direction of the signal under study is reduced, since the calibrating signal causes the reverse offset of the band of the recording.

Claims (2)

1. Electric measurements of non-electrical values. Ed. Novitsky P. V. L., Energie, 1975, p. sixteen. sixteen. 2. Salamander GD, et al. Some methods for investigating fast processes, M., AN, 1960, with. 56. .-i :: N, k.