SU1226180A1 - Device for measuring length of microopening in conductometric pulse transducer - Google Patents

Abstract

A device for measuring the length of the hole in the conductometric pulse sensor is designed to determine the operating parameters of the conductometric sensors. The purpose of the invention is to increase the monitoring efficiency by continuously measuring the average pulse duration of the sensors. The device contains a series-connected conductometric impulse sensor, an amplifier, a threshold discriminator, and an indicator. In this case, the inputs of the first and second intensometers are connected to the output of the discriminator, and the outputs, respectively, to the first and second inputs of the division unit. The output of the division unit is connected to the indicator. The first intensimeter is designed to provide a voltage at its output proportional to the product of average values of the pulse frequency and pulse duration, and the second pulse meter with the ability to provide a voltage at its output proportional to the average value of the pulse frequency a 1 Il. (P to o:

Description

1.1

The invention relates to a measurement technique, is intended to determine the performance parameters of conductometric sensors, and can be used in medicine, chemical and other industries.

The purpose of the invention is to increase the monitoring efficiency by continuously measuring the average pulse duration of the sensor.

The drawing shows a block diagram of the proposed device.

The device contains a conductometric pulse sensor 1, an amplifier of 2 pulses, a discriminator 3, a first intensity meter 4, a second intensity meter 5, a dividing unit 6 and an indicator 7.

The device works as follows.

When a particle passes through a pinhole of a conductometric pulse sensor 1, an electrical impulse is generated. This pulse is amplified by amplifier 2 and is fed to the input of the discriminator 3. The pulses at the output of the discriminator are rectangular, they are standardized in; amplitude and duration are equal to the number of impulses at the discrimination threshold level. From the discriminator, the pulses arrive at the inputs of the intensity meters 4 and 5. The circuit of the first intensity meter 4 is chosen so that the voltage at its output is equal to

and.

K. f. H

where f is the average frequency

pulses

1: - average pulse duration;

K - scale factor. The circuit of the second intensity meter 5 is designed to provide a voltage at its output, not dependent

five

0

s

0

five

0

1802

impulse duration (for example, by significantly reducing the time constant of the input circuit of the intensity meter as compared with the average pulse duration):

g K, f,

The voltages U and U are fed to the inputs of the division device 6. Voltage at the output of the division device

IT - - to - t - and - WHICH is the voltage applied to the input of the indicator. The magnitude of the coefficient Kj is determined by calibrating the device.

Claims (1)

Formula invented shadows A device for measuring the length of a pinhole of a conductometric pulse sensor, containing a series-connected conductometric pulse sensor, an amplifier and a threshold discriminator, as well as an indicator, characterized in that the device has a first and the second intensimeter whose inputs are connected to the discriminator's output, and the outputs to the first and second inputs of the block, respectively. When the output of the dividing unit is connected to an indicator, the first intensimeter is designed to provide a voltage at its output proportional to the product of average values of the pulse frequency and pulse duration, and the second intensimeter to provide a voltage at its output proportional to average pulse frequency.