SU1249403A1 - Digital viscometer - Google Patents

Abstract

The invention relates to the measurement of the rheological characteristics of liquids and pastes, in particular in the manufacture of thick-film chips, and can be used in chemical industry. The purpose of the invention is to simplify the design of the viscometer. The digital viscometer includes a measuring probe mounted on a shaft suspended from the viscometer body on a twisting spring, a cuvette for the motorized test medium and a viscosity to number of pulses circuit that includes a logic circuit and a cell rotation speed converter into a pulse duration that contains a counting disk with dark and light stripes on its generatrix installed on the shaft of rotation of the cuvette and optically connected to an optocoupler connected to one of the inputs of the logic circuit, ugoy input of which is connected to the comparator output. 1 nl s (c

Description

ten

20

The invention relates to the measurement of the rheological characteristics of liquids and pastes, in particular 5 in industrial production of thick-film microcircuits can be used in chemical industry.

The purpose of the invention is to simplify the viscometer contraction.

The drawing shows the scheme of the viscometer.

The digital viscometer contains an electric motor 1, a reducer 2, kyuet 3, a probe 4–3 times a resistive sensor, a measuring shaft 6, 7 of a 5 pin 5, a resistor S, a condensation 5 op 9, amplifiers 10 and 11 constant TGKS. (UPT), resistor 12, logic circuit, 2I-NOT 13, transducer 14 speeds of rotation of the cuvette into a pulse width, 1st) has a computational disk 15, optocoupler 1 6 and a rigger 17 "

The rotor of the electric motor 1 through

the reducer 2 is kinematically connected, with the F with the p cuvette 3, for the test substance 25 a which the probe 4 is placed. Fastened to the shaft 6, the shaft is connected to the housing through the prulus 7. A pod contact of the resistive sensor, 5 кес1, is connected to the valoE-: 6 and electr-gki-30- dinen to the input of the integrator cxeivir ,; Comparison on the basis of UPT 1, wiring 1 to the input of the circuit 2I --- NOT 3. The second contact of the resistive-o / sensor is connected -: directly to a certain jr of the circuit 3 to the integrator input and through a resistor 12 - to the bus Zesh1.

Inputs: Comparison node connection; one directly to the emergence of Kirr ei rator. and the second with the bus Zeml. 40

The optocoupler through the luminous flux is connected to a countable disc 15, from. forming a pike surface of which is applied, light and dark stripes. The optocoupler through a counting trigger 17 connects the 4S to the second input of the 2K-IW circuit. 13,

The device works in the next image;

From the output of the device based on the UPT Yun 11, the pulses are fed to the input of logic circuit 13. The luminous flux of the pad from the emitting diode of the optocoupler to the surface of the disk 15 is reflected from the light of the x bands and is sensed by the absorbing diode of the optocoupler. The latter begins to conduct current. On the counting input of the trigger 17 pulse cx-r with the frequency off

h - h

| T1 - h

Number o speed

where K parameter

We passed Triggge in comparison with Scheme 2 Exit sk chensho din

SO

A digital meter, one of which is connected with r: ерит to the driver, is violated to rush, ayushchiyu chivan, and a comparative circuit of the current, which is connected to the course 14Y compared with the input and contact of a tenant meter, and right next to the pulse, wk,;.:; by the vesnim, 1h and the most distant of the cuvees of the connection between which

h - NUMBER of turns of the cuvette per unit of time;

| T1 is the number of bright bands on a thin disk.

The speed of the cuvette shear rate

In

connected

by ratio

h. K, V,

where K is the coefficient determined by the parameters of the cuvette and probe.

The trigger 17 at time T permits the passage of pulses from the output of the comparison circuit 1 to the input of the logic circuit 2I1-1E 13. The number of impulses at the output of the circuit 13 is proportional to the dynamic viscosity.

l

3 о б р е

e ni

F with p 5 0 r

0

S

Chesk CX-G Moable

A digital viscometer containing a measuring probe1) W probe, which is attached to one end of the shaft, the other end of which is connected to the housing of the viscometer via a twisting spring, is iG: a test cell, an electric drive cell, a resistive rush sensor, and a torque of its twist pin. , voltage integrator, comparison circuit based on differential DC amplifiers, the resistive sensor connected to the integrator input, the output of which is connected to the input of the comparison circuit, and the output of the latter to the input of the integrator and A resistive sensor contact, which is based on the fact that, in order to control the design of the viscometer, a logical sensor and a cell rotation speed converter are inserted into the pulse width, including a counting disk with,;.:; on its forming tempered, 1ch and light stripes, the counting disk is fixed on the shaft of the cell's rotation, and its forming optically connected to the input of the optocoupler, the output of which is connected to the counting input of the trigger, and the output of the latter is connected to one from the inputs of the log. we whose other input is to Exit skhe comparison.

6

7 5

GLG - / Y

Editor N. Bobkova

Compiled by V. Voshchankin Tehred L. Oleinik

Order 4228/44 Circulation 778 Subscription.

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Proofreader L. Pilipenko

Claims (1)

Claim A digital viscometer containing a measuring probe fixed at one end of a shaft, the other end of which is connected to the viscometer body via a twisting spring, a measuring cell, an electric drive for rotating the cell, and a resistive sensor for twisting torque of the spring. voltage integrator, a comparison circuit based on differential DC amplifiers, the resistive sensor connected to the input of the integrator, the output of which is connected to the input of the comparison circuit, and the output of the latter with the integrator input and the sliding contact of the resistive sensor, which differs in that, with a circuit To simplify the design of the viscometer, it introduced a logic circuit and a transducer rotational speed transducer into a pulse duration, including a counting disk with dark and light stripes deposited on its generatrix , The counting disc fixed to the rotation shaft of the cell, and its generatrix is optically coupled to the input of the photocoupler, the output of which is connected to the counting input of the flip-flop, the output of the latter is connected to one input of the logic circuit, the other input of which is connected to the output of the comparison circuit.