SU1318889A1 - Transducer of moisture meter of fibrous material - Google Patents

Abstract

The invention relates to a measurement technique and can be used to measure the moisture of textile and similar fibers. The purpose of the invention is to improve the accuracy and speed of measurement. The sensor is made in two parts. The lower part is designed as a group of ridges parallel to each other fastened together, in the cavities between the teeth of which sensitive elements are mounted. The upper, movable part is a group of vertical plates, along which the lower edges are also sensitive elements. A sample of the fiber under test is placed between the lower and upper parts of the sensor and removed. When the specified force value is reached, a measuring pulse is applied to the upper part of the sensor and a humidity measurement is taken in 0.3-0.8 s. 6 Il. S CL 00 CX) OS AC

Description

The invention relates to a measuring technique and is intended to measure the moisture content of textile and similar fibers in a loose-weight state.

The aim of the invention is to increase the accuracy and speed of measurement.

FIG. 1 shows the sensor, the lower partJ in FIG. 2 - the same, side view; in fig. 3 - sensor upper subworld part; in fig. 4 is the same, side view, in FIG. 5 - sensor at the time of measurement; in fig. 6 - bottom part of the sensor, - top view.

The sensor of the moisture meter of the fibrous material contains the lower part 1 and the movable upper part 2. The lower part 1 is made as a group parallel to the ridges 3 fastened between them, with the intervals between the ridges approximately twice the height of the teeth 4 of the ridge 3. Sensitive thermoelements 5 of the sensor are located in the lower part of the recesses between the teeth 4 of the ridges 3 and are connected by a wire 6. The tops of the teeth 4 are sharp, and the recesses of the inter-. They are rounded to avoid sticking of the fibers of the test specimen 7.

The upper movable part 2 of the sensor is made in the form of a group of bonded plates 8 connected in parallel by the upper edges, the contact thermoelements 5 of the sensor are glued along the lower edges. The load on the upper part 2 of the sensor is transmitted by four springs 9. The outputs of thermoelements 5 are connected to the electrical circuit of the thermo-pulses of the moisture meter.

The sensor works as follows

A sample of the tested fiber 7 (without prior weighing) is placed in an approximately even layer on the bottom of sensor 1. Then the upper part 2 is lowered. In this case, the plates 8 of the upper part 2 enter between the ridges 3, and the fibers 7 under the action of the ribs of the plate fall down and are distributed between the teeth of the ridges 3. When lowering the ribs below

0

50

50

0

The level of the recesses between the teeth 4 of the fiber is forcibly bent, enveloping the surface of the ribs and the recesses between the teeth 4, and simultaneously stretch (Fig. 6). Thus, a local compaction of the fibers 7 at the surfaces of the thermoelements 4 of the sensor is created.

The presence of four springs 9, through which the force is transmitted, allows a corresponding inclination of the upper part 2 of the sensor to partly equalize the uneven thickness of the layer of the test fiber 7. When the specified force reaches the upper part 2, a measuring pulse is applied and in 0.3-0.8 s humidity measurement is taking place. The entire measurement operation takes 10-20 seconds.

The sensor has a higher measurement accuracy with the same sample size due to better contact of the sensitive element with the material being measured due to its local compaction, and high speed due to the split sealer design and the exclusion of the sample weighing operation.

Claims (1)

Invention Formula A moisture sensor for a fibrous material containing a seal of the material under investigation and sensitive elements, characterized in that, in order to improve the accuracy and speed of measurement, the sensor is made in two parts, the lower part of which is a group of pointed crests fastened together, in recesses between the teeth of which sensitive elements are installed, and the upper is made movable and contains a group of vertical plates, on the lower edges of which there are also sensitive elements, When this plate top portion located opposite the spaces between the ridges bottom of the seal, and both sides of the sensor are simultaneously seal .. L l d / X Fy FIG. MM  Pt / e, 2 Figm FIG. five / Compiled by A.Platova Editor A.Shandor Tehred A.Kravchuk Proofreader S.Cherni Order 2502/36 Edition 776 Subscription VNIGSHI State Committee of the USSR for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 FIG. 6