CN206557288U - A kind of digital fiber ratio resistance test device - Google Patents
A kind of digital fiber ratio resistance test device Download PDFInfo
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- CN206557288U CN206557288U CN201621206317.1U CN201621206317U CN206557288U CN 206557288 U CN206557288 U CN 206557288U CN 201621206317 U CN201621206317 U CN 201621206317U CN 206557288 U CN206557288 U CN 206557288U
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Abstract
The utility model provides a kind of digital fiber ratio resistance test device, and device includes casing, testing cassete, sample compression element and circuit arrangement；Circuit arrangement includes discharge switch, multiplying power switch, high-impedance amplifier, high-precision a/d converter, power module, touch-screen, micro controller, full scale correction voltage circuit, the discharge switch gear sample circuit arranged with discharge switch, bleeder circuit of connecting, power selection circuit, test voltage sample circuit and the multiplying power switch position sample circuit arranged with multiplying power switch.The utility model device, simple and compact for structure, cost is relatively low, and man-machine interaction is good, and measuring accuracy is high, is used conveniently and safely, not error-prone and result in high-precision test result.
Description
Technical field
The utility model is related to fibrous material measuring instrument field, and in particular to a kind of digital fiber ratio resistance test dress
Put.
Background technology
Textile fabric is under External Electrical Field, and conductive capability is very low, is a kind of good insulating body, ratio resistance（Resistivity）
It is general very high, especially synthetic fibers such as the low terylene of hygroscopicity, acrylic fibers, polyvinyl chloride fibre.During processing use, it is easy to produce
Electrostatic, is that this must control the ratio resistance value of fiber within the specific limits.Fiber ratio resistance tester is that textile fabric processing makes
It is indispensable with institute of enterprise.Measurement fiber ratio resistance is generally to simulate fiber type ratio resistance instrument using pointer at present, its major technique shortcoming
It is：1st, resistance measurement scope is small, it is impossible to meet the test request for developing increasing conductive fiber ratio resistance at present；2nd, refer to
Pin ammeter indicates that resistance value can produce artificial error in reading；3rd, measuring accuracy is poor, and test result reading is unstable；4th, measured result
For resistance value, ratio resistance need to be manually calculated as.Therefore, according to chemical fibre industry production and the survey of scientific research inspection body fiber ratio resistance
Examination is required, in the urgent need to a kind of digital fiber ratio resistance tester, to improve the test result degree of accuracy and testing efficiency.Because having
Fibrous insulation resistance it is high, tester can only use the band switch of high insulaion resistance ceramic material, therefore wave band is opened
The gear sampling of pass is its difficult point.Application No. 201510822232.X, publication No. are CN105425043A, innovation and creation name
The Chinese patent literature of referred to as " the automatic conpressed fibers ratio resistance test device of sample and its method of testing " discloses a kind of numeral
Formula fiber ratio resistance test device and its method of testing, it is for the test of low resistivity value is using increase low-resistance test switch and surveys
Selecting switch method is tried, not only makes test operation complicated, and reduces the insulaion resistance of test circuit, high specific resistance is reduced
It is worth test scope；Low resistivity value sample is set into high resistant test in tester's error to be possible to because of too high voltages or excessive
Electric current causes instrument to be damaged；Because sample resistance value is determined by meter reading and the signified part of multiplying power two of range switch,
It is not disclosed how the document obtains the signified multiplying power of range switch in testing.
Utility model content
The purpose of this utility model is：Simple compact, cost is relatively low, use there is provided a kind of in view of the shortcomings of the prior art
When testing range is wide, testing efficiency and high, the simple to operate safe and not error-prone digital fiber ratio resistance of testing precision
Test device.
The technical solution of the utility model is：Digital fiber ratio resistance test device of the present utility model, including casing,
Testing cassete, sample compression element and circuit arrangement；Above-mentioned circuit arrangement includes high-impedance amplifier and high-precision A/D conversions
Device；Above-mentioned testing cassete is used to accommodate tested fiber samples, and testing cassete plug type is arranged on casing；Testing cassete is provided with first
Battery lead plate and second electrode plate；It is structurally characterized in that：Above-mentioned circuit arrangement also includes discharge switch, multiplying power switch, power supply mould
Block, touch-screen, micro controller, discharge switch gear sample circuit, series connection bleeder circuit, power selection circuit, test voltage sampling
Circuit, multiplying power switch position sample circuit and full scale correction voltage circuit；Wherein：
Discharge switch, full school, electric discharge or test function are performed for selection device；Discharge switch respectively with above-mentioned test
The first electrode plate and second electrode plate of box, high-impedance amplifier, multiplying power switch, discharge switch gear sample circuit, full scale school
Positive electricity volt circuit and micro controller electrical connection；
Multiplying power is switched, for the selection of test voltage, range and multiplying power resistance gear, multiplying power switch respectively with it is above-mentioned
Discharge switch, power module, series connection bleeder circuit, power selection circuit, test voltage sample circuit, the sampling of multiplying power switch position
Circuit and micro controller electrical connection；
High-impedance amplifier and high-precision a/d converter, for detecting and sending sample detectable voltage signals to micro controller；
High-impedance amplifier and high-precision a/d converter concatenation, the input of high-impedance amplifier are electrically connected with discharge switch；High accuracy
The output end of A/D converter is electrically connected with micro controller；
Power module, for providing the power supply needed for testing；Power module out-put supply is by micro controller control；
Tested fiber samples are extruded, made by sample compression element when being used for testing under the control of micro controller
The first electrode plate and second electrode plate that fiber samples and above-mentioned testing cassete must be tested are in close contact；
Touch-screen, for man-machine information interaction, touch-screen is electrically connected with the two-way signaling of micro controller；
Micro controller, for calculating and data storage plant running Comprehensive Control, ratio resistance value；
Discharge switch gear sample circuit, causes micro controller automatic-decision device to be in school for sending signal to micro controller
Full, electric discharge or test mode；Discharge switch gear sample circuit is electrically connected with discharge switch and micro controller respectively；
Series connection bleeder circuit, the resistance measurement scope for extending tested fiber, series connection bleeder circuit switchs electricity with multiplying power
Connection, bleeder circuit of being connected when using is connected partial pressure with tested fiber samples；
Power selection circuit, voltage needed for for selecting test；Power selection circuit is switched and power supply with multiplying power respectively
Module is electrically connected；
Test voltage sample circuit, automatic detection current test voltage instantaneous value during for using；Test voltage sampling electricity
Road is electrically connected with power selection circuit and micro controller respectively；
Multiplying power switch position sample circuit, for sampling and sending range signal to micro controller；Multiplying power switch position is sampled
Circuit is electrically connected with multiplying power switch and micro controller respectively；
Full scale correction voltage circuit, for providing device school full required full scale correction voltage signal, full scale correction voltage
The input of circuit is electrically connected with power module；The output end of full scale correction voltage circuit is electrically connected with discharge switch.
Further scheme is：Above-mentioned discharge switch is the position rotary band switch of three knife three；Discharge switch, which has, to be put
Electric switch knob, the first moving contact D21 being coaxially synchronized with the movement under the driving of discharge switch knob, the second moving contact D22, the 3rd
Moving contact D23 and 3 static contacts J211, J212, J213 being equipped with the first moving contact D21, with the second moving contact D22
3 static contacts J221, J222, J223 being equipped with, with the 3rd moving contact D23 coordinate provided with 3 static contact J231, J232,
J233；Above-mentioned discharge switch knob is arranged on casing.
Further scheme is：Above-mentioned discharge switch gear sample circuit includes resistance R1~R5 totally 5 resistance；Its
In, resistance R1 one end ground connection, static contact J231 and resistance R2 that the resistance R1 other end passes through discharge switch one end is electrically connected
Connect；The static contact J232 of the resistance R2 other end, resistance R3 one end and discharge switch is conllinear；The resistance R3 other end, electricity
Resistance R4 one end and the static contact J233 of discharge switch are conllinear；The resistance R4 other end and resistance R5 one end have public connect
Point, the common junction is electrically connected with the DC3.3V power output ends that micro controller has；Resistance R5 another termination discharge switch
3rd moving contact D23；The discharge switch gear sampled signal input that 3rd moving contact D23 of discharge switch is set with micro controller
Electrical connection.
Further scheme is：Above-mentioned multiplying power switch is the position rotary band switch of three knife 11, and multiplying power switch has
Multiplying power switching knob, the first moving contact D31 being coaxially synchronized with the movement under the driving of multiplying power switching knob, the second moving contact D32, the
Three moving contact D33；11 static contact J311~J3111 being equipped with the first moving contact D31, match somebody with somebody with the second moving contact D32
The 11 static contact J321~J3211 set are closed, are coordinated with the 3rd moving contact D33 provided with 11 static contact J331~J3311；Times
Rate switching knob is arranged on casing；
Above-mentioned multiplying power switch is electrically connected by its first moving contact D31 and the second moving contact D32 with discharge switch.
Further scheme is：Above-mentioned series connection bleeder circuit includes resistance R6~R16 totally 11 resistance；Resistance R6~
The electrical connection corresponding with static contact J311~J3111 that multiplying power is switched of R16 each one end；Resistance R6~R16 each other end connects
Ground；Test in use, resistance R6~R16 according to setting gear and tested fiber samples（It can be considered resistance）Series connection partial pressure.
Further scheme is：The second moving contact D32 that above-mentioned above-mentioned power selection circuit is switched by multiplying power and with
Its 11 static contact J321~J3211 coordinated and the wire of connection are constituted；Wherein, static contact J321, static contact J322
And static contact J323 connected by conductor in parallel after form a common junction, the common junction is the of power selection circuit
One power input；Static contact J324~J3211 forms a common junction after totally 8 static contacts are connected by conductor in parallel,
The common junction is the second source input of power selection circuit；Power selection circuit is by its first and second power input
Electrically connected with power module.
Further scheme is：Above-mentioned multiplying power switch position sample circuit includes resistance R17~R29 totally 13 resistance；
Wherein, resistance R17 one end ground connection, the one end for the static contact J331 and resistance R18 that the resistance R17 other end is switched by multiplying power
Concatenation；Resistance R18~R28 is sequentially connected in series；Static contact J332~J3311 of multiplying power switch is successively every 2 with resistance R18~R28
The concatenation point correspondence of adjacent resistor is electrically connected；The resistance R28 other end not concatenated and resistance R29 one end have public connect
Point, the common junction connects the DC3.3V power output ends that micro controller has；The resistance R29 other end and the multiplying power is switched the 3rd is moved
Contact D33 is electrically connected；The multiplying power switch position sampled signal input that 3rd moving contact D33 of multiplying power switch is provided with micro controller
Electrical connection.
Further scheme is：Above-mentioned sample compression element is electric pushrod or air-leg.
The utility model has positive effect：（1）Digital fiber ratio resistance test device of the present utility model, structure
Simple compact, cost is relatively low, only needs to that by two knobs and touch-screen test operation, man-machine interaction can be completed when using
Property is good, easy and safe to operate when using, not error-prone.（2）Digital fiber ratio resistance test device of the present utility model, its
In use, state that can be automatically to test power supply, discharge switch, multiplying power switch is monitored in real time, with fault-tolerant protection work(
Can, security reliability is good.（3）Digital fiber ratio resistance test device of the present utility model, it is in test in use, to device
Null offset magnitude of voltage, school full voltage correction value etc. pay attention to and changed automatically, so as to effectively improve dress
The measuring accuracy put.（4）Digital fiber ratio resistance test device of the present utility model, it is provided with Ethernet interface, USB port, string
Mouthful, it is easy to networking, grafting USB flash disk etc. to use, has expanded the cost performance of device.
Brief description of the drawings
Fig. 1 is a kind of structural representation of device of the present utility model；
Fig. 2 is the circuit structure schematic block diagram of device of the present utility model；
Fig. 3 is the structural representation of first group of dynamic and static contact of discharge switch in Fig. 2, also schematically illustrates it in figure
Part electrical connection；
Fig. 4 is the structural representation of second group of dynamic and static contact of discharge switch in Fig. 2, also schematically illustrates it in figure
Part electrical connection；
Fig. 5 is the structural representation of the 3rd group of dynamic and static contact of discharge switch in Fig. 2, also schematically illustrates it in figure
With the electrical connection of discharge switch gear sample circuit in Fig. 2；
It is also schematically illustrated in the structural representation for first group of dynamic and static contact that Fig. 6 switchs for Fig. 2 moderate multiplying factors, figure
Connected with Fig. 2 the electrical connection of bleeder circuit；
Fig. 7 is the structural representation for second group of dynamic and static contact that Fig. 2 moderate multiplying factors are switched；
It also schematically shows in the structural representation for the 3rd group of dynamic and static contact that Fig. 8 switchs for Fig. 2 moderate multiplying factors, figure
Its electrical connection with Fig. 2 moderate multiplying factor switch position sample circuits.
Reference in above-mentioned accompanying drawing is as follows：
Casing 100,
Testing cassete 1,
Discharge switch 2, discharge switch knob 2-1, discharge switch gear sample circuit 21,
Multiplying power switchs 3, multiplying power switching knob 3-1, bleeder circuit 31 of connecting, test voltage sample circuit 32, multiplying power switch
Gear sample circuit 33；
High-impedance amplifier 4, high-precision a/d converter 5,
Power module 6, power switch 6-1, full scale correction voltage circuit 61,
Sample compression element 7,
Touch-screen 8,
Micro controller 9, too network interface 91, USB port 92, serial ports 93.
Embodiment
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
（Embodiment 1）
See Fig. 1 and Fig. 2, the digital fiber ratio resistance test device of the present embodiment, it is mainly by casing 100, testing cassete
1st, sample compression element 7 and circuit arrangement composition.Circuit arrangement include discharge switch 2, multiplying power switch 3, high-impedance amplifier 4,
High-precision a/d converter 5, power module 6, touch-screen 8, micro controller 9, discharge switch gear sample circuit 21, series connection partial pressure electricity
Road 31, power selection circuit, test voltage sample circuit 32, multiplying power switch position sample circuit 33 and full scale correction voltage circuit
61 compositions.
Micro controller 9, for calculating and data storage plant running Comprehensive Control, ratio resistance value, micro controller 9 is provided with and put
Electric switch gear sampled signal input, sample detection signal input part, the first and second test voltage sampled signal inputs,
Multiplying power switch position sampled signal input, the first and second power supply output control terminals, the output of sample compression element control signal
End, contact screen information interaction end and DC3.3V power output ends；Micro controller 9 is also equipped with the Ethernet on casing 100
Mouth 91, USB port 92 and serial ports 93.In the present embodiment, micro controller 9 is preferred to use technical grade MCU.
Power module 6 is used to provide the power supply needed for test；Power module 6 is by 1V voltage-stabilized power supplies and 100V voltage-stabilized power supply groups
Into power module 6 is provided with power input, first, second power output end and the input of first, second power supply output control signal
End；First, second power supply output control signal input of power module 6 and the first and second power supplys output of micro controller 9 are controlled
End correspondence processed is electrically connected；In use, the power input of power module 6 is by being disposed in outside the power switch 6-1 on casing 100
220V civil powers are connect, the first power output end output DC1V power supplys of power module 6, the second source output end of power module 6 is defeated
Go out DC100V power supplys；The out-put supply of power module 6 is controlled by micro controller 9；Power module 6 had when exporting 100V voltage-stabilized power supplies
Current protecting function.
Full scale correction voltage circuit 61 is used to provide school full required full scale correction voltage signal, full scale correction voltage circuit
61 input and the second source output end of power module 6（100V）Electrical connection.
The plug type of testing cassete 1 is arranged on casing 100；Testing cassete 1 is provided with first electrode plate and second electrode plate, first
Spacing between battery lead plate and second electrode plate is fixed.In use, testing cassete 1 accommodates tested fiber samples, fiber samples are tested
Extruded, be in close contact with the first electrode plate in testing cassete 1 and second electrode plate by sample compression element 7.
Referring to Fig. 3 to Fig. 5, discharge switch 2 is the position rotary band switch of three knife three, and discharge switch 2 has discharge switch
Knob 2-1, the first moving contact D21 being coaxially synchronized with the movement under discharge switch knob 2-1 drivings, the second moving contact D22, the 3rd
Moving contact D23, coordinates provided with 3 static contacts J211, J212, J213 with the first moving contact D21, coordinates with the second moving contact D22
Provided with 3 static contacts J221, J222, J223, coordinate with the 3rd moving contact D23 provided with 3 static contacts J231, J232, J233；Put
Electric switch knob 2-1 is arranged on casing 100.
First moving contact D21 of discharge switch 2 is electrically connected with the first electrode plate of testing cassete 1；Static contact J211 and full scale
The output end electrical connection of correction voltage circuit 61；Static contact J212 is grounded；Second moving contact D22 of discharge switch 2 and testing cassete 1
Second electrode plate electrical connection；Static contact J221 is vacant；Static contact J222 is grounded；
Discharge switch gear sample circuit 21, causes at the automatic-decision device of micro controller 9 for sending signal to micro controller 9
Yu Jiaoman, electric discharge or test mode；Discharge switch gear sample circuit 21 and the supporting setting of discharge switch 2, discharge switch gear
By resistance R1~R5, totally 5 resistance are constituted sample circuit 21；Wherein, resistance R1 one end ground connection, the resistance R1 other end passes through
Static contact J231 is electrically connected with resistance R2 one end；The resistance R2 other end, resistance R3 one end and static contact J232 are conllinear；
The resistance R3 other end, resistance R4 one end and static contact J233 are conllinear；The resistance R4 other end has with resistance R5 one end
There is common junction, the common junction connects the DC3.3V power output ends of micro controller 9；Resistance R5 another termination discharge switch 2
3rd moving contact D23；3rd moving contact D23 of discharge switch 2 connects the discharge switch gear sampled signal input electricity of micro controller 9
Connection.
Discharge switch 2 is used for device for selection controlling and performs full school, electric discharge or test function；The third gear function of discharge switch 2 is by 1
Being set gradually to 3 grades expires for school, discharges and tests；And discharge switch knob 2-1 peripheries set respective identification on casing, use
When, when discharge switch knob 2-1 is placed in school completely shelves, the first moving contact D21 and static contact J211 is connected, the second moving contact D22
Connected with static contact J221, the 3rd moving contact D23 and static contact J231 is connected；When discharge switch knob 2-1 is placed in electric discharge shelves,
First moving contact D21 and static contact J212 are connected, and the second moving contact D22 and static contact J222 is connected, the 3rd moving contact D23 with it is quiet
Contact J232 is connected；When discharge switch knob 2-1 is placed in test shelves, the first moving contact D21 and static contact J213 is connected, and second
Moving contact D22 and static contact J223 is connected, and the 3rd moving contact D23 and static contact J233 is connected.
High-impedance amplifier 4 and high-precision a/d converter 5 are concatenated, for detecting and sending sample detection electricity to micro controller 9
Press signal；High-impedance amplifier 4 and high-precision a/d converter 5 are ripe prior art, are no longer described in detail.High impedance amplifies
The input of device 4 is electrically connected with the first moving contact D21 of discharge switch 2；The output end of high-precision a/d converter 5 and micro controller 9
Sample detection signal input part electrical connection.
Referring to Fig. 6 to Fig. 8, multiplying power switch 3, the selection for test voltage, range and multiplying power resistance gear；Multiplying power is opened
It is the position rotary band switch of three knife 11 to close 3, and multiplying power switch 3 has multiplying power switching knob 3-1, in multiplying power switching knob 3-1
The first moving contact D31, the second moving contact D32, the 3rd moving contact D33 being coaxially synchronized with the movement under driving, with the first moving contact D31
Coordinate provided with 11 static contact J311~J3111, coordinate with the second moving contact D32 provided with 11 static contact J321~J3211, with
3rd moving contact D33 coordinates provided with 11 static contact J331~J3311；Multiplying power switching knob 3-1 is arranged on casing 100.
First moving contact D31 of multiplying power switch 3 is electrically connected with the static contact J213 of discharge switch 2；The second of multiplying power switch 3
Moving contact D32 is electrically connected with the static contact J223 of discharge switch 2.
Referring to Fig. 6, bleeder circuit 31 of connecting, the resistance measurement scope for extending tested fiber, bleeder circuit 31 of connecting
It is main that by resistance R6~R16, totally 11 multiplying power resistance are constituted；Resistance R6~R16 each one end switchs 3 static contact with multiplying power
J311~J3111 correspondences are electrically connected；Resistance R6~R16 each other end is grounded；During test, multiplying power resistance R6~R16 is according to setting
The gear put and tested fiber samples（It can be considered resistance）Series connection partial pressure.
Referring to Fig. 7, power selection circuit, voltage needed for for selecting test；Power selection circuit is switched the of 3 by multiplying power
Two moving contact D32 and constituted with its 11 static contact J321~J3211 coordinated and the wire being connected；Wherein, static contact
J321, static contact J322 and static contact J323 form a common junction after connecting by conductor in parallel, and the common junction is
For the first power input of power selection circuit；First power input of power selection circuit and the first of power module 6
Power output end（DC1V）Electrical connection；Static contact J324~J3211 forms one after totally 8 static contacts are connected by conductor in parallel
Common junction, the common junction is the second source input of power selection circuit；The second source of power selection circuit is defeated
Enter end and the second source output end of power module 6（DC100V）Electrical connection；During use, when the second moving contact D32 with it is quiet
When any of contact J321~J323 connects, device selects the power supply of DC1V tests；When the second moving contact D32 and static contact
When any of J324~J3211 connects, device selects the power supply of DC100V tests.
Test voltage sample circuit 32, automatic detection current test voltage instantaneous value during for using；Test voltage is sampled
Circuit 33 be provided with first, second signal input part and first, second signal output part, test voltage sample circuit 33 first,
The electrical connection corresponding with first, second power input of foregoing power selection circuit of secondary signal input；Test voltage is adopted
First, second signal output part of sample circuit 33 electricity corresponding with first, second test voltage sampled signal input of micro controller 9
Connection.
Referring to Fig. 8, multiplying power switch position sample circuit 33, for sampling and sending range signal to micro controller 9；Multiplying power is opened
Close gear sample circuit 33 and multiplying power switch 3 is supporting sets, multiplying power switch position sample circuit 33 is by resistance R17~R29 totally 13
Resistance composition；Wherein, resistance R17 one end ground connection, the resistance R17 other end passes through the one of static contact J331 and resistance R18
End concatenation；Resistance R18~R28 is sequentially connected in series；Static contact J332~J3311 successively with every 2 adjacent resistors of resistance R18~R28
Concatenation point correspondence electrically connect, for example, static contact J332 and resistance R18 and resistance the R19 point that concatenates are electrically connected；Static contact
J3311 concatenates point electrical connection with resistance R27's and resistance R28, and the rest may be inferred；The resistance R28 other end not concatenated and resistance
R29 one end has common junction, and the common junction connects the DC3.3V power output ends of micro controller 9；The resistance R29 other end with
The 3rd moving contact D33 electrical connections of multiplying power switch 3；3rd moving contact D33 of multiplying power switch 3 and the multiplying power switch shelves of micro controller 9
Position sampled signal input electrical connection.In the present embodiment, resistance R17~R27 resistance value is 100 Ω, resistance R28 resistance value
For 560 Ω, R29 resistance value is 20k Ω.Resistance R17 effect is to allow the voltage of the first gear to be distinguished with ground voltage, resistance
R28 effect is to allow the voltage of last gear to be distinguished with+3.3V, and resistance R29 effect is so that multiplying power switch 3 in rotation
Voltage when being not yet connected during turning with gear stationary contact is about+3.3V.
Multiplying power switch 3 is driven by its multiplying power switching knob 3-1 on casing 100 so that the first of multiplying power switch 3 moves
Contact D31, the second moving contact D32, the 3rd moving contact D33 are synchronous respectively to connect with the static contact of its 11 gear each arranged
Touch；Multiplying power switching knob 3-1 is labeled with 11 gears on casing 100, the corresponding resistance range of 11 gears be 10 Ω~
103Ω、103Ω~105Ω、105Ω~107Ω、106Ω~107Ω、107Ω~108Ω、108Ω~109Ω、109Ω~1010
Ω、1010Ω~1011Ω、1011Ω~1012Ω、1012Ω~1013Ω、1013Ω~1014Ω, in use, when multiplying power switchs rotation
When button 3-1 is placed in first, second, and third gear, the multiplying power resistance value of selection is 102Ω、104Ω and 106Ω, now selected
Test voltage value is 1V, when multiplying power switching knob 3-1 is placed in the 4th to 11 gear, and the multiplying power resistance value of selection is 104
Ω~1011Ω, now selected test voltage value is 100V；The multiplying power switching knob 3-1 of multiplying power switch 3 is rotated counterclockwise to not
It can revolve, now each movable contact of multiplying power switch 3 connects the first gear stationary contact arranged with it respectively, and micro controller 9 will be sampled
About 0.2V voltage, multiplying power switch 3 often turns clockwise a gear, and micro controller 9 will sample rise about 0.2V voltage, micro-control
Device 9 switchs 3 gear with this determination multiplying power.
Still see Fig. 2, sample compression element 7 is used to compress the tested fiber samples inserted in testing cassete 1 so that quilt
Fiber samples are surveyed to be in close contact with the first electrode plate and second electrode plate in testing cassete 1.Sample compression element 7 can use electronic
Push rod, can also use in air-leg, the present embodiment and be preferred to use electric pushrod.Sample compression element 7 is provided with and the phase of micro controller 9
The control signal input of connection, the action of sample compression element 7 is controlled by micro controller 9；The control signal of sample compression element 7
Input is electrically connected with the sample compression element control signal output of micro controller 9.
Touch-screen 8 is used for the man-machine information interactions, touch-screen 8 such as parameter is inputted, operation is selected, test and warning message is shown
Electrically connected with the information exchange end two-way signaling of micro controller 9.
（Application examples）
Referring to Fig. 1~8, the digital fiber ratio resistance test device of previous embodiment, its when in use, for testing quilt
Accuse and survey fiber samples ratio resistance, carried out using following steps：
1. device school zero：Engaging means power supply is preheated, and inputs fiber samples type to be measured by touch-screen 8, preheating terminates
Afterwards according to the prompting of touch-screen 8, discharge switch 2 is placed in electric discharge gear by rotating electric-discharging switching knob 2-1；Device is opened by electric discharge
Pass gear sample circuit 21 automatically detects discharge switch 2 and had been placed in after electric discharge gear, the now input of high-impedance amplifier 4 termination
Ground, i.e. connecting to neutral current potential；Micro controller 9 is felt through high-impedance amplifier 4 and the collection of high-precision a/d converter 5 and save set because outside
The null offset magnitude of voltage Vo for answering voltage and device circuit Parameters variation reason to produce；
2. device school is expired：The prompting of touch-screen 8 puts electric switch 2 to the full gear in school, and rotating electric-discharging switching knob 2-1 will discharge
Switch 2 is placed in the full gear in school；Device automatically detects discharge switch 2 and put after the full gear in school, and device, which carries out school, expires, and school is completely terminated
Afterwards, touch-screen 8 points out discharge switch 2 putting electric gear；Discharge switch 2 is placed in electric discharge shelves by rotating electric-discharging switching knob 2-1
Position；
In this step, the full method in school uses following steps：
The first step, calculates ideal voltage value Vf：Micro controller 9 uses formula（1）Calculate ideal voltage value Vf:
Vf=Rs × Vt/ (Rm-Rs)（1）
In formula, micro controller 9 receives the test voltage value for the actual measurement that test voltage sample circuit 32 is sent when Vt expires for school,
Rs, Rm be micro controller 9 it is preset can make when test device school is full be full scale resistance value, wherein Rs can be considered sample resistance
Value, Rm can be considered multiplying power resistance value；Ideal voltage value Vf is magnitude of voltage when not considering various influences suffered by device.
Second step, calculates and preserves school full voltage correction value：Micro controller 9 uses formula（2）Calculate and preserve school full voltage
Correction value Vi：
Vi=Vf- (Va-Vo)（2）
In formula, Va is the electricity for the multiplying power resistance Rm that micro controller 9 is obtained through high-impedance amplifier 4 and high-precision a/d converter 5
It is compacted measured value, Vo is the null offset magnitude of voltage of step 1. middle gained, Vf is the desired electrical obtained by the first step in foregoing step
Pressure value；
3. the corresponding multiplying power gear of fiber samples and test voltage are selected：According to fiber samples to be measured, determine that its is corresponding
Multiplying power gear, rotation multiplying power switching knob 3-1 to the multiplying power gear set；Multiplying power is selected by rotating multiplying power switching knob 3-1
While gear, the corresponding test voltage of the gear is selected；
4. fiber samples are tested：By fiber samples to be measured（15g staple fibres）It is put into testing cassete 1 and by testing cassete 1
In place；Compression sample order is sent to microcontroller 9 by touch-screen 8, the conpressed fibers sample of sample compression element 7 is to setting position
Put；The prompting of touch-screen 8 puts electric switch 2 to test gear, and discharge switch 2 is placed in test shelves by rotating electric-discharging switching knob 2-1
Position；Device automatically detects after discharge switch 2 has put test gear and automatically begins to countdown in 60 seconds, and power module 6 gives testing cassete 1
Plus default test voltage, by the electric current overwhelming majority of fiber samples through discharge switch 2, multiplying power switch 3 to ground, and again
Test signal voltage value Vm is formed on the multiplying power resistance that rate switch 3 is connect, high-impedance amplifier 4 amplifies the voltage and through high accuracy
A/D converter 5 is converted into after data signal sending micro controller 9；Touch-screen 8 receives the test signal voltage value that micro controller 9 is sent
Vm is simultaneously shown in real time, if test signal voltage value Vm is basicly stable constant, and the prompting of touch-screen 8 confirms that currency is test value；
If test signal voltage value Vm is with time drift, microcontroller 9 it is automatic by 60s the countdown concluded when test signal voltage value Vm
It is used as the measured value of confirmation；Micro controller 9 gathers the gear of now multiplying power switch 3 by multiplying power switch position sample circuit 33 simultaneously
Number, it is determined that corresponding multiplying power resistance value Rm simultaneously determines that current test voltage gear is 1V or 100V simultaneously；Resistance value Rm is resistance
R16-R16 measures gained and the resistance value being stored in micro controller 9 through precision resister instrument；Micro controller 9 is simultaneously by testing electricity
Sample circuit 32 is pressed to obtain the real-time detected value Vt of test voltage；
5. the resistance value of tested fiber samples is calculated：Micro controller 9 first uses formula（3）Calculate test signal voltage value Vm's
Correction value Vmc, then using formula（4）Calculate the resistance value Rx of tested fiber samples：
Vmc=(Vm-Vo) × Vi/Vf（3）
In formula, Vo is the null offset magnitude of voltage of step 1. middle gained, and Vm is the test signal voltage of step 4. middle gained
Value, Vi is the school full voltage correction value of step 2. middle gained；Vf is the ideal voltage value of step 2. middle gained；
Rx=Vmc × Rm/ (Vt-Vmc)（4）
Vt is the current real-time voltage value detected by test voltage sample circuit 32 in formula, and Rm is current multiplying power resistance
Value；
6. the ratio resistance value of tested fiber samples is calculated：Micro controller 9 is according to the parameter and meter of the tested fiber samples of input
The resistance value Rx of the tested fiber samples calculated, the general formula calculated according to ratio resistance calculates the ratio resistance value of the sample,
And send the display in real time of touch-screen 8；Micro controller 9 preserves the resistance value Rx and ratio resistance value of the tested fiber samples of this detection；
7. testing cassete is removed：Touch-screen 8 is pointed out discharge switch 2 putting electric gear, and rotating electric-discharging switching knob 2-1 will be put
Electric switch 2 is placed in electric discharge gear；Device automatically detects discharge switch 2 by discharge switch gear sample circuit 21 and has been placed in putting
After electric gear, the Control Assay compression element 7 of micro controller 9 is disengaged with testing cassete 1, removes testing cassete 1, takes out this tested fibre
Tie up sample；
8. repeat step 4. to step 7., the lower portion 15g fiber samples of test, until finishing the test sample needed for testing
Number of times；Device calculates preservation test result and its statistical value automatically；Instrument is calculated automatically and its statistical value rounding off method is followed most
The fiber ratio resistance method of testing standard newly announced.
Abovementioned steps 2. with step 5. in involved calculation formula, be in the application example interplantation in the control of micro controller 9
Calculation formula in program.
In the test process involved by abovementioned steps, detection is added in real time by test voltage sample circuit 32 for micro controller 9
Test voltage, once detect incorrect magnitude of voltage, for example make a fault by low-resistance value sample elect as 100V test electricity
During pressure test, micro controller 9 control power module 6 to cut off this test power supply immediately, stops testing and by touch-screen 8 to tester
Member gives a warning prompt message.
In order that multiplying power resistance reaches specified resistance value generally using several in pointer simulates the production of fiber type ratio resistance instrument
Individual resistance realizes that the stability of resistance value is poor, in the present embodiment by series-parallel system, and micro controller 9 preserves multiplying power switch 3 and used
In all multiplying power resistance R6~R16 of expansion fiber resistance measurement scope exact value, the precision of measured value is improved and accurate
Degree, the also production of convenient instrument.
In the present embodiment, device can automatic detection discharge switch 2 whether put electric gear, put in discharge switch 2
During electric gear, the fiber samples in testing cassete 1 could be compressed or discharge operation, be compressed or release to prevent fiber samples
Put and electrostatic is produced in operating process, harmful effect is produced to device.
Above example and application examples are the explanations to embodiment of the present utility model, rather than to the utility model
Limitation, person skilled in the relevant technique can also do in the case where not departing from spirit and scope of the present utility model
Go out various conversion and change and obtain corresponding equivalent technical scheme, therefore all equivalent technical schemes should be included into
Scope of patent protection of the present utility model.
Claims (8)
1. a kind of digital fiber ratio resistance test device, including casing, testing cassete, sample compression element and circuit arrangement；Institute
The circuit arrangement stated includes high-impedance amplifier and high-precision a/d converter；Described testing cassete is used to accommodate tested fiber examination
Sample, testing cassete plug type is arranged on casing；Testing cassete is provided with first electrode plate and second electrode plate；It is characterized in that：Institute
The circuit arrangement stated also includes discharge switch, multiplying power switch, power module, touch-screen, micro controller, discharge switch gear sampling electricity
Road, series connection bleeder circuit, power selection circuit, test voltage sample circuit, multiplying power switch position sample circuit and full scale school
Positive electricity volt circuit；Wherein：
Discharge switch, full school, electric discharge or test function are performed for selection device；Discharge switch respectively with described testing cassete
First electrode plate and second electrode plate, high-impedance amplifier, multiplying power switch, discharge switch gear sample circuit, full scale correction electricity
Volt circuit and micro controller electrical connection；
Multiplying power is switched, for the selection of test voltage, range and multiplying power resistance gear, multiplying power switch respectively with described electric discharge
Switch, power module, series connection bleeder circuit, power selection circuit, test voltage sample circuit, multiplying power switch position sample circuit
And micro controller electrical connection；
High-impedance amplifier and high-precision a/d converter, for detecting and sending sample detectable voltage signals to micro controller；High resistant
Anti- amplifier and high-precision a/d converter concatenation, the input of high-impedance amplifier is electrically connected with discharge switch；High-precision A/D
The output end of converter is electrically connected with micro controller；
Power module, for providing the power supply needed for testing；Power module out-put supply is by micro controller control；
Tested fiber samples are extruded so that quilt by sample compression element when being used for testing under the control of micro controller
The first electrode plate and second electrode plate for surveying fiber samples and described testing cassete are in close contact；
Touch-screen, for man-machine information interaction, touch-screen is electrically connected with the two-way signaling of micro controller；
Micro controller, for calculating and data storage plant running Comprehensive Control, ratio resistance value；
Discharge switch gear sample circuit, for causing micro controller automatic-decision device to expire in school to micro controller transmission signal,
Electric discharge or test mode；Discharge switch gear sample circuit is electrically connected with discharge switch and micro controller respectively；
Series connection bleeder circuit, the resistance measurement scope for extending tested fiber, series connection bleeder circuit is electrically connected with multiplying power switch,
Bleeder circuit of being connected when using is connected partial pressure with tested fiber samples；
Power selection circuit, voltage needed for for selecting test；Power selection circuit is switched and power module with multiplying power respectively
Electrical connection；
Test voltage sample circuit, automatic detection current test voltage instantaneous value during for using；Test voltage sample circuit point
Do not electrically connected with power selection circuit and micro controller；
Multiplying power switch position sample circuit, for sampling and sending range signal to micro controller；Multiplying power switch position sample circuit
Electrically connected respectively with multiplying power switch and micro controller；
Full scale correction voltage circuit, for providing device school full required full scale correction voltage signal, full scale correction voltage circuit
Input electrically connected with power module；The output end of full scale correction voltage circuit is electrically connected with discharge switch.
2. digital fiber ratio resistance test device according to claim 1, it is characterised in that：Described discharge switch is
The position rotary band switch of three knife three；Discharge switch has discharge switch knob, the coaxial synchronous under the driving of discharge switch knob
Motion the first moving contact D21, the second moving contact D22, the 3rd moving contact D23 and be equipped with the first moving contact D21 3
Individual static contact J211, J212, J213,3 static contacts J221, J222, J223 being equipped with the second moving contact D22, with
Three moving contact D23 coordinate provided with 3 static contacts J231, J232, J233；Described discharge switch knob is arranged on casing.
3. digital fiber ratio resistance test device according to claim 2, it is characterised in that：Described discharge switch shelves
Position sample circuit includes resistance R1~R5 totally 5 resistance；Wherein, resistance R1 one end ground connection, the resistance R1 other end is by putting
The static contact J231 of electric switch is electrically connected with resistance R2 one end；The resistance R2 other end, resistance R3 one end and electric discharge is opened
The static contact J232 of pass is conllinear；The static contact J233 of the resistance R3 other end, resistance R4 one end and discharge switch is conllinear；Electricity
One end of the other end and resistance R5 that hinder R4 has common junction, and the common junction is exported with the DC3.3V power supplys that micro controller has
End electrical connection；3rd moving contact D23 of resistance R5 another termination discharge switch；3rd moving contact D23 of discharge switch with it is micro-
Control the discharge switch gear sampled signal input electrical connection that device is set.
4. digital fiber ratio resistance test device according to claim 1, it is characterised in that：Described multiplying power is switched
The position rotary band switch of three knife 11, multiplying power switch is coaxial same with multiplying power switching knob, under the driving of multiplying power switching knob
Walk the first moving contact D31, the second moving contact D32, the 3rd moving contact D33 of motion；11 be equipped with the first moving contact D31
Individual static contact J311~J3111,11 static contact J321~J3211 being equipped with the second moving contact D32, it is dynamic tactile with the 3rd
Head D33 coordinates provided with 11 static contact J331~J3311；Multiplying power switching knob is arranged on casing；
Described multiplying power switch is electrically connected by its first moving contact D31 and the second moving contact D32 with discharge switch.
5. digital fiber ratio resistance test device according to claim 4, it is characterised in that：Described series connection partial pressure electricity
Road includes resistance R6~R16 totally 11 resistance；Static contact J311~J3111 that resistance R6~R16 each one end is switched with multiplying power
Correspondence electrical connection；Resistance R6~R16 each other end is grounded；Test in use, resistance R6~R16 according to setting gear and quilt
Survey fiber samples series connection partial pressure.
6. digital fiber ratio resistance test device according to claim 4, it is characterised in that：Described power supply selection electricity
Route multiplying power switch the second moving contact D32 and with its 11 static contact J321~J3211 coordinated and the wire being connected
Constitute；Wherein, formation one is public after static contact J321, static contact J322 and static contact J323 are connected by conductor in parallel connects
Point, the common junction is the first power input of power selection circuit；Totally 8 static contacts pass through static contact J324~J3211
Conductor in parallel forms a common junction after connecting, the common junction is the second source input of power selection circuit；Power supply
Selection circuit is electrically connected by its first and second power input with power module.
7. digital fiber ratio resistance test device according to claim 4, it is characterised in that：Described multiplying power switch shelves
Position sample circuit includes resistance R17~R29 totally 13 resistance；Wherein, resistance R17 one end ground connection, the resistance R17 other end leads to
The static contact J331 for crossing multiplying power switch is concatenated with resistance R18 one end；Resistance R18~R28 is sequentially connected in series；The stationary contact of multiplying power switch
Head J332~J3311 electrical connections corresponding with the concatenation point of every 2 adjacent resistors of resistance R18~R28 successively；Resistance R28's does not go here and there
One end of the other end connect and resistance R29 has common junction, and the common junction connects the DC3.3V power supplys output that micro controller has
End；The resistance R29 other end is electrically connected with the 3rd moving contact D33 that multiplying power is switched；Multiplying power switch the 3rd moving contact D33 with it is micro-
The multiplying power switch position sampled signal input electrical connection that control device is provided with.
8. digital fiber ratio resistance test device according to claim 1, it is characterised in that：Described sample compression structure
Part is electric pushrod or air-leg.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621128714 | 2016-10-17 | ||
| CN2016211287141 | 2016-10-17 |
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| Publication Number | Publication Date |
|---|---|
| CN206557288U true CN206557288U (en) | 2017-10-13 |
Family
ID=60369571
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621206317.1U Withdrawn - After Issue CN206557288U (en) | 2016-10-17 | 2016-11-08 | A kind of digital fiber ratio resistance test device |
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| CN (1) | CN206557288U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110069170A (en) * | 2019-05-13 | 2019-07-30 | 京东方科技集团股份有限公司 | Touch screen report point rate processing method, device, electronic equipment and readable storage medium storing program for executing |
-
2016
- 2016-11-08 CN CN201621206317.1U patent/CN206557288U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110069170A (en) * | 2019-05-13 | 2019-07-30 | 京东方科技集团股份有限公司 | Touch screen report point rate processing method, device, electronic equipment and readable storage medium storing program for executing |
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