CN201503445U - Textile and fibrous material electrostatic detector - Google Patents
Textile and fibrous material electrostatic detector Download PDFInfo
- Publication number
- CN201503445U CN201503445U CN2009202270832U CN200920227083U CN201503445U CN 201503445 U CN201503445 U CN 201503445U CN 2009202270832 U CN2009202270832 U CN 2009202270832U CN 200920227083 U CN200920227083 U CN 200920227083U CN 201503445 U CN201503445 U CN 201503445U
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- China
- Prior art keywords
- field effect
- effect transistor
- textile
- reometer
- inductive head
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Abstract
A textile and fibrous material electrostatic detector comprises an inductive head, a current-limiting resistor, a discharge button, a field effect transistor, an ammeter, an adjustable resistor, a power supply and a power switch, wherein the inductive head is connected to a grid electrode on the field effect transistor after being connected in serials with the current-limiting resistor; a source electrode of the field effect transistor is connected with a positive terminal of the ammeter; a drain electrode of the field effect transistor is connected to a slide arm of the adjustable resistor; and other end of the adjustable resistor is connected with a negative terminal of the ammeter after being connected in serials with the power supply and the power switch. The textile and fibrous material electrostatic detector has the advantages of simple structure, low cost, accuracy, reliability, small volume, simple operation and on-site detection.
Description
Technical field
The utility model relates to a kind of electrostatic detection device, specifically is a kind of textile and fiber material static detector.
Background technology
Textile and fibrous material are when being in contact with one another friction or rubbing mutually with other objects, can produce positive and negative different static, in general, the charge characteristic on two articles surface depends on electron stream and triboelectric series, in electric array, the keep left fabric strip positive electricity on limit, and the fabric strip equivalent negative electricity on the limit of keeping right.Known textile fibres electric array is as follows: (+) wool, polyamide fibre, silk, viscose rayon, cotton, ramie, acetate fiber, polyvinyl, terylene, acrylic fibers, polypropylene fibre (-).
In the production of textile and fibrous material, circulation, storage link, we often need pay close attention to various textiles and fibrous material produce static in being in contact with one another and rubbing phenomenon, the electrostatic phenomenon of textile and fibrous material very easily damages the operate as normal of cmos circuit, interference calculation machine and other electronic devices, also might cause the burning and the blast of inflammable gas, oils and combustible dust.
Country and industry standard that China is used for textile, the test of clothes antistatic property at present have following several method: GB/T12703-1991 " textile static electricity testing method ", FZ/T01059-1 999 " fabric frictional static determining adsorption method ", FZZY0 1061-1999 " fabric electrification by friction voltage determination method ", though we can carry out electrostatic detection and test to textile and fibrous material according to above standard, but because the instrument of electrostatic detection and measurement belongs to professional instrument, not only cost an arm and a leg, and complicated operation, can't popularization and application.
The utility model content
In order to overcome the shortcoming that above-mentioned prior art exists, the purpose of this utility model is to provide a kind of small and exquisite, simple to operate and cheap textile simple in structure and fiber material static detector.
The technical scheme that its technical matters that solves the utility model adopts is: this textile and fiber material static detector comprise inductive head, current-limiting resistance, discharge button, field effect transistor, reometer, adjustable resistance, power supply, power switch.Inductive head be connected on the grid of field effect transistor after current-limiting resistance is connected, the source electrode of field effect transistor is connected in the positive terminal of reometer, the drain electrode of field effect transistor is connected on the travelling arm of adjustable resistance, and the negative terminal with reometer after the other end of adjustable resistance is connected with power supply and power switch links.
After the power switch closure, under the effect of supply voltage, form drain current I between the drain electrode of field effect transistor and the source electrode
D, regulate adjustable resistance, make I
D=1/2Ig, wherein Ig is the full deflection current of reometer, the pointer of reometer will be parked in the centre position of whole scale at this moment.Textile after charged object or the friction and fibrous material are when the inductive head, even contact induction head not also electrostatic induction can take place, static will be arrived the grid of field effect transistor by inductive head through current-limiting resistance.When the grid induction of field effect pipe to electrostatic field when being the electric field of negative charge, the resistance between drain electrode of effect pipe and the source electrode increases drain current I
DReduce, the pointer that reometer was parked in the scale centre position originally will be the deflection of "-" direction to the left side; That is to say that ammeter pointer is deflection left, the textile and the fibrous material that are detected are electronegative.When the grid induction of field effect pipe to electrostatic field when being the electric field of positive charge, the resistance between drain electrode of effect pipe and the source electrode reduces drain current I
DIncrease, the pointer that reometer was parked in the scale centre position originally will be the deflection of "+" direction to the right; That is to say that ammeter pointer is deflection to the right, textile that is detected and fibrous material positively charged.When distance one timing of ambient humidity and charged object and inductive head, ammeter pointer degree of deflection to the left or to the right, main relevant with the intensity of electrostatic field, promptly the intensity of electrostatic field is big more, and the ammeter pointer deflection angle is big more.
Field effect transistor belongs to the voltage-controlled type semiconductor devices, has high input impedance, and when the intensity of electrostatic field was enough big, after charged object removed, the static of sensing on its grid can not disappear immediately.Therefore as further technical scheme of the present utility model: parallel discharge button on the negative terminal of the grid of described field effect transistor and reometer.When ammeter pointer can not be got back to the scale centre position immediately, press discharge button, the electrostatic grounding on the grid is released, ammeter pointer can turn back to the scale centre position immediately.
The beneficial effects of the utility model are: it is simple in structure, cheap, accurately and reliably, volume is small and exquisite, can on-the-spotly survey, be convenient to popularization and application, is particularly useful for the electrostatic detection of textile and fibrous material.
Description of drawings
Below in conjunction with drawings and Examples the utility model is described further:
Fig. 1 is the circuit theory diagrams of the utility model embodiment;
Fig. 2 is the contour structures synoptic diagram of the utility model embodiment.
Embodiment
As depicted in figs. 1 and 2, this textile and fiber material static detector comprise inductive head TC, current-limiting resistance R, discharge button AN, field effect transistor T, reometer BT, adjustable resistance W, power supply E, power switch K, probe body 1.Inductive head TC be connected on the grid G of field effect transistor T after current-limiting resistance R connects, the source S of field effect transistor T is connected in the positive terminal of reometer BT, the drain D of field effect transistor T is connected on the travelling arm of adjustable resistance W, negative terminal with reometer BT after the other end of adjustable resistance W is connected with power supply E and power switch K links, parallel discharge button AN on the negative terminal of the grid G of field effect transistor T and reometer BT, above components and parts are installed in the shell 1, and inductive head TC exposes shell 1.
Inductive head TC selects 1cm for use
2The metallic copper thin slice make, current-limiting resistance is 1M Ω, field effect transistor T is a N raceway groove JFET technotron, reometer BT is full deflection current Ig=1mA, the magneto-electric reometer of internal resistance 600 Ω, adjustable resistance W are 30K Ω, the voltage of power supply E is 1.5V.
Claims (2)
1. textile and fiber material static detector, it is characterized in that: comprise shell and circuit part, described circuit part comprises inductive head, current-limiting resistance, discharge button, field effect transistor, reometer, adjustable resistance, power supply, power switch; Described inductive head exposes shell, inductive head be connected on the grid of field effect transistor after current-limiting resistance is connected, the source electrode of field effect transistor is connected in the positive terminal of reometer, the drain electrode of field effect transistor is connected on the travelling arm of adjustable resistance, and the negative terminal with reometer after the other end of adjustable resistance is connected with power supply and power switch links.
2. textile according to claim 1 and fiber material static detector is characterized in that: a discharge button in parallel on the grid of described field effect transistor and the negative terminal of reometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202270832U CN201503445U (en) | 2009-09-21 | 2009-09-21 | Textile and fibrous material electrostatic detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202270832U CN201503445U (en) | 2009-09-21 | 2009-09-21 | Textile and fibrous material electrostatic detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201503445U true CN201503445U (en) | 2010-06-09 |
Family
ID=42454377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202270832U Expired - Fee Related CN201503445U (en) | 2009-09-21 | 2009-09-21 | Textile and fibrous material electrostatic detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201503445U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103235195A (en) * | 2013-04-28 | 2013-08-07 | 北京理工大学 | Non-contact static detection device |
| CN111141965A (en) * | 2019-12-26 | 2020-05-12 | 兰州空间技术物理研究所 | Electrostatic field measuring circuit using field effect transistor |
-
2009
- 2009-09-21 CN CN2009202270832U patent/CN201503445U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103235195A (en) * | 2013-04-28 | 2013-08-07 | 北京理工大学 | Non-contact static detection device |
| CN103235195B (en) * | 2013-04-28 | 2015-07-29 | 北京理工大学 | A kind of Non-contact static detection device |
| CN111141965A (en) * | 2019-12-26 | 2020-05-12 | 兰州空间技术物理研究所 | Electrostatic field measuring circuit using field effect transistor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100609 Termination date: 20120921 |