CN2236133Y

CN2236133Y - Chemical fiber identifyer

Info

Publication number: CN2236133Y
Application number: CN 95210777
Authority: CN
Inventors: 姚继华; 胡汉中
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-05-11
Filing date: 1995-05-11
Publication date: 1996-09-25
Anticipated expiration: 2005-05-11

Abstract

The utility model relates to a chemical fiber identifier. The utility model is characterized in that the chemical fiber identifier uses a field-effect transistor BG as a detecting element, the grid electrode of the field-effect transistor is connected with a metal probe head, and the source electrode of the field-effect transistor is connected with the input terminal foot of a time-base integrated package. The output terminal of the time-base integrated package is connected with the triggering end of an audio power amplifier integrated package IC2 through a current-limiting resistor. With the adoption of the utility model, the existence of the chemical fiber component in the detected manufactured product can be judged out conveniently, quickly and accurately.

Description

The chemical fibre recognizer

The utility model relates to a kind of can be used for man-made fiber, comprises the electronic apparatus that chemical fibre products such as chemical ﹠ blended fabric, chemical fibre knitting wool are discerned.

For the different textile of of a great variety, kind at present, most of people are difficult to directly judge with feel whether it exists the chemical fibre composition; Though have and burn Wen Qiwei, see the indirect method of inspection such as its ash, also need to rely on personal experience, accuracy to be difficult to guarantee.

The purpose of this utility model is to avoid the deficiencies in the prior art part, and a kind of chemical fibre recognizer fibre is provided, and helps existence that people judge Chemical fiber component easily and fast, exactly whether.

The purpose of this utility model realizes by following technical solution.

Technical characterictic of the present utility model is to adopt field effect transistor as detecting element, connects metal probe at the grid of field effect transistor, its source electrode with the time base integrated package input end be connected, the time basic integrated package output terminal be connected with the audio frequency power amplifier trigger end by resistance.Feature of the present utility model also is at field effect transistor source electrode serial connection potentiometer.

The utility model has the advantages that simple in structure, easy to use, accuracy of judgement.

Accompanying drawing is the utility model electrical block diagram.

By the following examples, in conjunction with the accompanying drawings the utility model is further described.

Embodiment:

As shown in the figure: M is that metal probe, BG are that field effect transistor, IC1 are 555 time base circuits, and IC2 is a sound signal generation piece, adopts KD9562 octave warning integrated package, and Y is loudspeaker.Metal probe M is connected the grid of field effect transistor BG, and its source electrode is connected with input end 2 pin of time base integrated package IC1, the time base integrated package IC1 output terminal 3 pin pass through resistance R 3 and be connected with audio frequency power amplifier ic chip 2 trigger ends.

Owing to have electrostatic field around the chemical fibre product, when metal probe M is positioned at active zone, can be with this input, and put on field effect transistor BG, make its pinch off, resistance R SD increases between the field effect transistor BG drain-source utmost point, the time base integrated package IC1 the 2nd pin current potential be lower than 1/3VCC, IC1 is triggered, the 3rd pin output high level of IC1 drives the voicefrequency circuit that is made of IC2 then, and loudspeaker Y is sent chimes of doom, meanwhile, supply voltage charges to capacitor C 2 by R2, until the 6th of ic chip 1, when 7 pin current potentials reach 2/3VCC, the output state flip of time base circuit IC1, its the 3rd pin is transferred output low level, and loudspeaker stop sounding thereupon.When in tested goods, not having Chemical fiber component, because there is not induced signal in probe M, at this moment, the drain-source electrode resistance RSD resistance of field effect transistor BG is less, the crus secunda current potential of time base integrated package IC1 is higher than 1/3VCC, IC1 the 3rd pin output low level, and this recognizer is sounding not.

In the present embodiment, the source electrode serial connection potentiometer W at field effect transistor BG regulates W and can change its detection sensitivity.

Claims

1, a kind of chemical fibre is knitted other device, it is characterized in that adopting field effect transistor BG as detecting element, connect metal probe M at the grid of field effect transistor BG, its source S with the time base integrated package IC1 input end 2 pin be connected, ic chip 1 output terminal 3 pin pass through resistance R 3 and are connected with audio frequency power amplifier piece IC2 trigger end.

2, chemical fibre according to claim 1 is knitted other device, it is characterized in that at field effect transistor BG source electrode serial connection potentiometer W.