CN101315362A - Fabric specific resistance instrument and fabric resistor and fabric specific resistance measurement method - Google Patents

Fabric specific resistance instrument and fabric resistor and fabric specific resistance measurement method Download PDF

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Publication number
CN101315362A
CN101315362A CNA2008100223606A CN200810022360A CN101315362A CN 101315362 A CN101315362 A CN 101315362A CN A2008100223606 A CNA2008100223606 A CN A2008100223606A CN 200810022360 A CN200810022360 A CN 200810022360A CN 101315362 A CN101315362 A CN 101315362A
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China
Prior art keywords
resistance
fiber
full scale
gear
impedance transformer
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CNA2008100223606A
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Chinese (zh)
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CN101315362B (en
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王球
邢胜锁
俞峰
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Xu Lijiang
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TAICANG HONGDA TEXTILE INSTRUMENTS CO Ltd
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Abstract

A fiber specific resistance instrument includes a measuring cavity, a resistance range switch (including a shifting standard resistance), an impedance transformer, a functional switch (including a specific resistance measuring divider resistance), an AD converter and an LED display. The instrument establishes a stable basis of reference through adjusting zero and full scales, adopts a high input impedance operational amplifier as the impedance transformer, simplifies the circuit structure and improves the reliability. The instrument expands the fiber resistance measuring range (0.2*10<6>-2.0*10<13>Omega) through the K1 resistance range switch. The instrument realizes the fiber resistance linear display by adopting the method of exchanging the AD input INT end and the standard REF end. The instrument realizes the specific resistance measuring direct digital display through the functional switch K2 and the specific resistance measuring divider resistance.

Description

Fiber compares resistance measurement method than resistance instrument and fabric resistor with fiber
Technical field
The present invention relates to a kind of fiber than resistance instrument, the invention still further relates to a kind of fabric resistor and than the measuring method of resistance.
Background technology
Fiber can be used to measure various man-made fiber resistance values than resistance instrument, is one of important instrument of test man-made fiber spinnability, and the departments such as scientific research, examination of fibers, fiber production and use that are applicable to measure fiber and compare resistance value.
The constant weight fiber in the measurement chamber of fixed volume, applies certain pressure, and fabric resistor meets the electrical property-law of resistance of general material in the measurement chamber.Fiber is to consider in the measurement chamber of filling fiber also to have the space than resistance, under specific density conditions, promptly under standard compactedness condition, with the fabric resistor volume density than the ratio resistance that is converted into fiber.
Existing fiber than the impedance transformer of resistance instrument by old-fashioned DC-2 electrometer tube (vacuum tube) and general amplifier cooperate constitute complex structure and frangible, poor reliability.
Fabric resistor multiply by a certain proportion of activity coefficient and is fiber and compares resistance.The existing ratio resistance value that after recording fabric resistor, obtains fiber than resistance instrument by artificial calculation mode.
Summary of the invention
Purpose of the present invention, provide that a kind of circuit structure is simple, reliability is high, directly display fibers than the fiber of resistance measurement value than resistance instrument.Another object of the present invention, provide a kind of can linear display fibers resistance and directly display fibers than the measuring method of resistance.
For achieving the above object, technical scheme provided by the present invention is:
The fiber that the present invention announced than the technical scheme that resistance instrument adopted is:
A kind of fiber is than resistance instrument, and it comprises
Measure the chamber, be used to place tested fiber, the one end applies measuring voltage V and surveys, and measures the other end and the gear resistance R that is used for expansion fiber resistance measurement scope in chamber 11～R 1mConstitute the series connection dividing potential drop;
Impedance transformer, input termination fabric resistor partial pressure value V High, with the fabric resistor partial pressure value V of high resistant HighBe transformed into low-impedance voltage V Low, impedance transformer is that impedance is greater than 10 12Ω, voltage amplification factor are 1 high resistance operating amplifier;
AD converter and the display device that is connected its output terminal, AD converter is three and half AD, display device is three and half light-emitting diode displays;
Resistance range K switch 1, insert the dividing potential drop node d that measures between chamber and the impedance transformer 1, the gear resistance R 11... R 1mOne end is unsettled, other end ground connection, resistance range K switch 1By the gear resistance R 11... R 1mThe Q of unsettled setting 1... Q mEnd connects the gear resistance R 11... R 1m
Functional switch K 2, be connected with the input end INT of AD converter, be used to insert be connected in series a plurality of than resistance measurement divider resistance R 21... R 2nIn node P between adjacent two resistance 2... P n, the impedance variation device low-impedance voltage V LowOutput terminal node P 1
Full scale is proofreaied and correct resistance R M1, R M2, zero degree proofreaies and correct resistance R L1, zero potentiometer R P1, transfer full potentiometer R P2, be used for the zero full scale of corrective system and set up reference data.
The fabric resistor that the present invention announced with fiber than the technical scheme that resistance measurement method adopted is:
A kind of fabric resistor value and the measuring method of fiber than resistance value, it comprises the steps:
Zero degree is proofreaied and correct: range switch K 1Zero setting degree gear Q 0, zero degree is proofreaied and correct resistance R L1By the range K switch 1Be connected functional switch K with the input end of impedance transformer 2Put the output terminal node P of impedance transformer 1Shelves, the Low ESR output voltage of impedance transformer insert the INT end of AD converter, and the REF termination is gone into reference voltage 0.1V, adjusts zero potentiometer R P1Displayed value to display device is 00.0%;
Full scale is proofreaied and correct: resistance range K switch 1Insert full scale and proofread and correct resistance R M1, R M2Between full scale gear Q f, measuring the chamber equivalence is resistance R XThe fiber of=∞, full scale is proofreaied and correct resistance R M1, R M2The magnitude of voltage that the reference voltage that dividing potential drop obtains going into the REF termination equates, promptly 0.1V adjusts and transfers full potentiometer R P2Displayed value to display device is 100.0%;
Fabric resistor is measured: x is restrained fiber put into the measurement chamber, and be pressurized to certain position by the pressure device, according to fiber material difference, by resistance range K switch 1Select to insert suitable gear resistance R 11... R 1m, functional switch K 2Put the output terminal node P of impedance transformer 1, the input end INT of AD converter, reference edge REF is inverted automatically by relay contact, and promptly reference edge REF inserts the Low ESR output voltage V of impedance transformer Low, the INT termination is gone into reference voltage 0.1V, display device display fibers resistance value;
Fiber is than resistance measurement: after fabric resistor is measured and is finished, and functional switch K 2According to the fiber species difference, put P 2... P nShelves, the display device display fibers compares resistance value.
Because the employing of technique scheme, the present invention compared with prior art has the following advantages:
The present invention adopts the high resistant amplifier to make impedance transformer, and is simpler than old-fashioned tube impedance converter circuit, good reliability.The present invention adopts AD input end and the mutual method of replacing of reference voltage terminal, realizes linear display fibers resistance value.With the method for fabric resistor partial pressure value with resistance series connection dividing potential drop, directly display fibers omits hand computation than resistance, has improved efficiency of measurement.
Description of drawings
Figure 1 shows that circuit connection diagram of the present invention;
Wherein: 1, measure the chamber; 2, impedance transformer; 3, AD converter; 4, display device.
Embodiment
A kind of fiber is than resistance instrument, and it comprises
Measure chamber 1, be used to place tested fiber, the one end applies measuring voltage V Survey, the other end in measurement chamber 1 and the gear resistance R that is used for expansion fiber resistance measurement scope 11～R 1mConstitute the series connection dividing potential drop;
Impedance transformer 2, input termination fabric resistor partial pressure value V High, with the fabric resistor partial pressure value V of high resistant HighBe transformed into low-impedance voltage V Low, impedance transformer 2 is that impedance is greater than 10 12Ω, voltage amplification factor are 1 high resistance operating amplifier, and the input end of impedance transformer is by tetrafluoroethene ring and circuit boards;
AD converter 3 and the display device 4 that is connected its output terminal, AD converter 3 is three and half AD, display device 4 is three and half light-emitting diode displays;
Resistance range K switch 1, insert the dividing potential drop node d that measures between chamber 1 and the impedance transformer 2 1, the gear resistance R 11... R 1mOne end is unsettled, other end ground connection, resistance range K switch 1By the gear resistance R 11... R 1mThe Q of unsettled setting 1... Q mEnd connects the gear resistance R 11... R 1m
Functional switch K 2, be connected with the input end INT of AD converter 3, be used to insert be connected in series a plurality of than resistance measurement divider resistance R 21... R 2nIn node P between adjacent two resistance 2... P n, impedance variation device 2 low-impedance voltage V LowOutput terminal node P 1
Full scale is proofreaied and correct resistance R M1, R M2, zero degree proofreaies and correct resistance R L1, zero potentiometer R P1, transfer full potentiometer R P2, be used for the zero full scale of corrective system and set up reference data, zero potentiometer R P1 Insert impedance transformer 2, transfer full potentiometer R P2Insert the reference voltage input REF of AD converter 3, two full scales are proofreaied and correct resistance R M1, R M2Be connected in series, their end applies measuring voltage V Survey, other end ground connection, the dividing potential drop node between the two forms full scale gear Q f, zero degree is proofreaied and correct resistance R L1The unsettled formation zero degree of one end gear Q 0, other end ground connection, resistance range K switch 1By full scale gear Q fInsert full scale and proofread and correct resistance R M1, R M2Between, by zero degree gear Q 0Insert zero degree and proofread and correct resistance R L1, be positioned at measuring voltage V SurveyThe full scale of one side is proofreaied and correct resistance R M1Resistance proofread and correct resistance R much larger than the full scale that is positioned at earth terminal one side M2Resistance.
A kind of fabric resistor value and the measuring method of fiber than resistance value, it comprises the steps:
1, zero degree is proofreaied and correct: range switch K 1Zero setting degree gear Q 0, zero degree is proofreaied and correct resistance R L1By the range K switch 1Be connected functional switch K with the input end of impedance transformer 2 2Put the output terminal node P of impedance transformer 2 1Shelves, AD converter 3 input voltages connect the INT end, and reference voltage 0.1V inserts the REF end, and the zero degree that is input as of impedance transformer 2 is proofreaied and correct resistance R L1Ground voltage, adjust zero degree potentiometer R P1, make the output voltage V of impedance transformer 2 LowBe 0V, the displayed value of display device 4 is 00.0%;
2, full scale is proofreaied and correct: resistance range K switch 1Insert full scale and proofread and correct resistance R M1, R M2Between full scale gear Q f, measuring chamber 1 equivalence is resistance R XThe fiber of=∞ is established V Survey=100V, then
V High=100 * R M2/ R M1+ R M2, R M1＞＞R M2,
If R M2/ R M1=1/1000,
V then High=0.1V, impedance transformer voltage amplification factor A=1, then V Low=0.1V, the input end of AD converter 3 inserts V INT=0.1V adjusts the full scale resistor R P2, make described reference voltage input REF get input voltage and described full scale correction resistance R M1, R M2Between partial pressure value equate i.e. V High=V REF=0.1, the displayed value of display device 4 is 100.0%., zero full scale is proofreaied and correct to apparatus measures, amplification, AD conversion provide a reference data, is that instrument is realized the accurately basis of test, and zero degree aligning step and full scale aligning step carry out several repeatedly, reach stationary value to the output of display device 4;
3, fabric resistor is measured: x is restrained fiber put into and measure chamber 1, and the pressure device is pressurized to certain position, according to fiber material difference, by resistance range K switch 1Select to insert suitable described gear resistance R 11... R 1mFree end Q 1... Q m, functional switch K 2Put the output terminal node P of described impedance transformer 2 1, the input end INT of AD converter 3, reference edge REF is inverted automatically by relay contact, and promptly reference edge REF inserts the Low ESR output voltage V of impedance transformer 2 Low, the INT termination is gone into reference voltage 0.1V, impedance transformer voltage amplification factor A=1, then
V High=V Low=100 * R 1m/ R x+ R 1m, m=1,2...,
The fabric resistor displayed value is D R=1000 * V INT/ V REF, V wherein INT=0.1V, V REF=100 * R 1m/ R X, D R=R X/ R 1m,
R 1mBe definite value, the fabric resistor displayed value is proportional to fabric resistor R X, realized the linear digital demonstration,
Range switch places Q 1Shelves, R 11Be 10 3Ω, R XGreatest measurement is 2 * 10 6Ω, measurement range is 0.200～2.000 * 10 6Ω, K 1Place Q 2Shelves, R 12=10 4Ω, R XGreatest measurement is 2 * 10 7Ω, measurement range is 0.200～2.000 * 10 7Ω, the rest may be inferred, K 1Place Q 8Shelves, R 18=10 10Ω, R XThe maximal value measured value is 2 * 10 13Ω, measurement range is 0.200～2.000 * 10 13Ω;
4, fiber is than resistance measurement: after fabric resistor was measured and finished, functional switch was put P according to the fiber species difference 2... P nShelves, display device 4 display fibers are than resistance value, fabric resistor measuring voltage V LowThrough than resistance gear resistance R 21, R 22... R 2nSeries connection dividing potential drop, its output voltage values have dwindled 1/, and (12 * f) doubly, and fiber than resistance displayed value is
D ρ=1000 * V INT/ V REF, V wherein INT=0.1V,
V REF=100 * R 1m/ 12 * f * R X, then
D ρ=12 * f * R X/ R 1m=12 * f * D RD R=R X/ R 1mThe fabric resistor displayed value,
Functional switch K 2P 2Shelves keep off than resistance measurement for terylene, and the terylene activity coefficient is 0.23, then D ρ=2.76 * D R, K 2P 3Shelves keep off polyvinyl f=0.24, D ρ=2.88 * D than resistance measurement for polyvinyl R, P 4And P 5Shelves are respectively acrylic fibers, and continuous synthetic fibre is than resistance measurement shelves, and these two kinds of kind f are 0.27, D ρ=3.24 * D R, P 6Shelves be polypropylene fibre than resistance measurement shelves, polypropylene fibre f=0.35, D ρ=4.20 * D R, fiber should suitably reduce K than resistance measurement 1The resistance range makes than resistance displayed value 0.200～2.000 * 10 6-13In the Ω .cm scope.

Claims (7)

1, a kind of fiber is characterized in that than resistance instrument: it comprises
Measure chamber (1), be used to place tested fiber, the one end applies measuring voltage (V Survey), the other end in described measurement chamber (1) and the gear resistance (R that is used for expansion fiber resistance measurement scope 11～R 1m) formation series connection dividing potential drop;
Impedance transformer (2), input termination fabric resistor partial pressure value (V High), with the described fabric resistor partial pressure value (V of high resistant High) be transformed into low-impedance voltage (V Low), described impedance transformer (2) is that impedance is greater than 10 12Ω, voltage amplification factor are 1 high resistance operating amplifier;
AD converter (3) and be connected the display device (4) of its output terminal, described AD converter (3) is three and half AD, described display device (4) is three and half light-emitting diode displays;
Resistance range switch (K 1), insert the dividing potential drop node (d between described measurement chamber (1) and the described impedance transformer (2) 1), described gear resistance (R 11... R 1m) end is unsettled, other end ground connection, described resistance range switch (K 1) by described gear resistance (R 11... R 1m) the Q of unsettled setting 1... Q mEnd connects described gear resistance (R 11... R 1m);
Functional switch (K 2), be connected with the input end (INT) of described AD converter (3), be used to insert be connected in series a plurality of than resistance measurement divider resistance (R 21... R 2n) in node (P between adjacent two resistance 2... P n), the described low-impedance voltage (V of described impedance variation device (2) Low) output terminal node (P 1);
Full scale is proofreaied and correct resistance (R M1, R M2), zero degree proofreaies and correct resistance (R L1), zero potentiometer (R P1), transfer full potentiometer (R P2), be used for the zero full scale of corrective system and set up reference data.
2, fiber according to claim 1 is characterized in that than resistance instrument: the input end of described impedance transformer is by tetrafluoroethene ring and circuit boards.
3, fiber according to claim 1 is characterized in that than resistance instrument: described zero potentiometer (R P1) inserting described impedance transformer (2), potentiometer (R expired in described accent P2) insert the reference voltage input (REF) of described AD converter (3).
4, fiber according to claim 1 is characterized in that than resistance instrument: two described full scales are proofreaied and correct resistance (R M1, R M2) be connected in series, their end applies measuring voltage (V Survey), other end ground connection, the dividing potential drop node between the two forms full scale gear (Q f), described zero degree is proofreaied and correct resistance (R L1) the unsettled formation zero degree of end gear (Q 0), other end ground connection, described resistance range switch (K 1) by described full scale gear (Q f) the described full scale correction of access resistance (R M1, R M2) between, by described zero degree gear (Q 0) the described zero degree correction of access resistance (R L1).
5, fiber according to claim 1 is characterized in that than resistance instrument: be positioned at measuring voltage (V Survey) the described full scale of a side proofreaies and correct resistance (R M1) resistance proofread and correct resistance (R much larger than the described full scale that is positioned at earth terminal one side M2) resistance.
6, a kind of fabric resistor value and the measuring method of fiber than resistance value are used fiber as claimed in claim 1 than resistance instrument, and it comprises the steps:
Zero degree is proofreaied and correct: range switch (K 1) zero setting degree gear (Q 0), zero degree is proofreaied and correct resistance (R L1) by range switch (K 1) be connected functional switch (K with the input end of impedance transformer (2) 2) put the output terminal node (P of impedance transformer (2) 1) shelves, the Low ESR output voltage of impedance transformer (2) inserts the INT end of AD converter (3), and the REF termination is gone into reference voltage 0.1V, adjusts zero potentiometer (R P1) to the displayed value of display device (4) be 00.0%;
Full scale is proofreaied and correct: resistance range switch (K 1) access full scale correction resistance (R M1, R M2) between full scale gear (Q f), measuring chamber (1) equivalence is the fiber of resistance Rx=∞, full scale is proofreaied and correct resistance (R M1, R M2) magnitude of voltage that the dividing potential drop reference voltage that obtains going into the REF termination equates, promptly 0.1V adjusts and transfers full potentiometer (R P2) to the displayed value of display device (4) be 100.0%;
Fabric resistor is measured: x is restrained fiber put into measurement chamber (1), and be pressurized to certain position by the pressure device, according to fiber material difference, by resistance range switch (K 1) the suitable gear resistance (R of selection access 11... R 1m), functional switch (K 2) put the output terminal node (P of impedance transformer (2) 1), the input end (INT) of AD converter (3), reference edge (REF) is inverted automatically by relay contact, and promptly reference edge (REF) inserts the Low ESR output voltage (V of impedance transformer (2) Low), the INT termination is gone into reference voltage 0.1V, display device (4) display fibers resistance value;
Fiber is than resistance measurement: after fabric resistor is measured and is finished, and functional switch (K 2) according to the fiber species difference, put P 2... P nShelves, display device (4) display fibers compares resistance value.
7, fabric resistor value according to claim 6 and the measuring method of fiber than resistance value is characterized in that: described zero degree aligning step and described full scale aligning step carry out several repeatedly, reach stationary value to the output of display device (4).
CN2008100223606A 2008-06-26 2008-06-26 Fabric specific resistance instrument, fabric resistor and fabric specific resistance measurement method Expired - Fee Related CN101315362B (en)

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CN104020354A (en) * 2014-06-19 2014-09-03 上海市纺织科学研究院 Method for detecting specific resistance of short fibers of chemical fibers
CN104793055A (en) * 2015-04-12 2015-07-22 盐城工学院 Fabric surface specific resistance and volume specific resistance testing device
CN104793168A (en) * 2015-04-28 2015-07-22 安徽华茂纺织股份有限公司 Checking method of fiber specific resistance meter
CN104897966A (en) * 2015-05-18 2015-09-09 湖北丹瑞新材料科技有限公司 Detecting system of zero resistance value of platinum resistor of nitrogen-oxygen sensor chip and method
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CN104020354A (en) * 2014-06-19 2014-09-03 上海市纺织科学研究院 Method for detecting specific resistance of short fibers of chemical fibers
CN104793055A (en) * 2015-04-12 2015-07-22 盐城工学院 Fabric surface specific resistance and volume specific resistance testing device
CN104793168A (en) * 2015-04-28 2015-07-22 安徽华茂纺织股份有限公司 Checking method of fiber specific resistance meter
CN104897966A (en) * 2015-05-18 2015-09-09 湖北丹瑞新材料科技有限公司 Detecting system of zero resistance value of platinum resistor of nitrogen-oxygen sensor chip and method
CN104897966B (en) * 2015-05-18 2017-09-01 湖北丹瑞新材料科技有限公司 A kind of nitrogen oxide sensor chip RTD zero degree resistance detecting system and method
CN105425043A (en) * 2015-11-24 2016-03-23 上海新纤仪器有限公司 Fiber specific resistance testing apparatus and testing method with characteristic of automatic sample compression
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CN106501607A (en) * 2016-09-30 2017-03-15 天津工业大学 Fiber ratio resistance tester
CN106405243A (en) * 2016-10-17 2017-02-15 常州市华纺纺织仪器有限公司 Test device and test method for digital fiber-ratio resistor
CN106405243B (en) * 2016-10-17 2023-04-11 常州市华纺纺织仪器有限公司 Digital fiber specific resistance testing device and testing method thereof

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Assignee: TAICANG HONGDA FANGYUAN ELECTRIC Co.,Ltd.

Assignor: Taicang Hongda Textile Instruments Co.,Ltd.

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Denomination of invention: Fabric specific resistance instrument and fabric resistor and fabric specific resistance measurement method

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