CN102565537B - A kind of slip testing system of electric contact simulation - Google Patents
A kind of slip testing system of electric contact simulation Download PDFInfo
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- CN102565537B CN102565537B CN201210007486.2A CN201210007486A CN102565537B CN 102565537 B CN102565537 B CN 102565537B CN 201210007486 A CN201210007486 A CN 201210007486A CN 102565537 B CN102565537 B CN 102565537B
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Abstract
The invention discloses a kind of slip testing system of electric contact simulation, comprise sliding stand unit, slip measuring unit and slip control module.After print and contact are installed, start slip testing system of electric contact simulation, in slip control module, set command parameter information, and send to sliding stand unit; Sliding stand unit, according to the order parameter accepted, produce the sliding motion of setting, and feedback position information is accurately located to each sampled data points; The collection of slip measuring unit contact to fall voltage signal, and collection signal is delivered to computer unit carry out data storage, process and figure display, then calculate contact resistance value, this unit also can measure the contact interface temperature with resistance value correspondence position.Application the present invention can increase the test channel of Contact Resistance, and can accurately locate, and measures contact resistance value and the contact interface temperature value of correspondence position, improves the precision of Contact Resistance test, reduce the complicacy of experimental implementation.
Description
Technical field
The present invention's design relates to a kind of technology simulating slip electrical contact, is related specifically to a kind of slip testing system of electric contact simulation.
Background technology
In communication, computing machine, measurement, control and all kinds of electronic system, need a large amount of electronics to connect.They play maintains effect between various electronic component circuit, between equipment and even between system each other.Electrical contact specializes in the science of electronics connection, is used to a kind of state that description two assemblies produce because of electrical contacts.Electronics connection is realized by physical construction mostly.In real life, the plug of such as earphone, the plug of power connection, latch are relatively and the plug of socket etc., capital produces and significantly moves, and the relevant sizable motion of relative motion amplitude that switches on and off between electronic devices and components is called as slip.Friction and wear is the important phenomenon of slip electrical contact, rubs and will make the energy loss in sliding process, wearing and tearing then make surface metal particularly noble metal lose rapidly, expose base metal, thus cause corrosion and loose contact.
In order to better study the impact of sliding phenomenon on electrical contact, reducing sliding friction and the loss that electrical equipment is caused of wearing and tearing, improving the reliability of electrical equipment.To the assessment of this index of electric connector, function life-span prediction so that in malfunction analysis procedure, laboratory simulation is current internationally recognized effective means.Contact Resistance as weigh slide lost efficacy an important indicator, dynamically reproduced contact resistance in sliding process change and to electrical contact performance effect, be analyze and research slide key parameter.
In electrical contact field, particularly for communication low voltage connector, the contact of employing is less, but wider range of contact change, from a few gram force to gram force up to a hundred, also from several millimeters to tens millimeters not etc., the cycle of slip is general all long for the amplitude of slip.Thus, in research and analysis, the normal process adopting the method for laboratory speeding-up simulation to carry out the slip of accelerated evolution device, simulation is slided and was lost efficacy.
Contact Resistance test macro is the experimental provision of speeding-up simulation connector sliding phenomenon, the general relative motion right by control connector electrical contact, the process that speeding-up simulation connector slides, right contact resistance value is contacted and automatic record, the impact of test slip on electrical contact performance in test sliding process.
Fig. 1 is existing Contact Resistance test system structure schematic diagram.As shown in Figure 1, Contact Resistance test cell 11, sliding stand module 12, computer unit 13 and pedestal 14 is comprised.Wherein,
Contact Resistance test cell 11, comprises constant current source 111, normal pressure applying device 112, test contact 113, test sample 114 and digital multimeter 115.
Constant current source 111 first end is connected with test contact 113, and the second end is connected with test sample 114; Be set as that test contact 113 offside that digital multimeter 115 first end of DC voltage measurement shelves is connected with constant current source 111 is connected, test sample 114 offside that second end is connected with constant current source 111 is connected, the connecting circuit connecting and composing four-point method between constant current source 111, test contact 113, test sample 114 and digital multimeter 115;
Test sample 114 is fixed on print fixed station 121 surface, and in test, test contact 113 contacts with test sample 114 and forms test access;
Be set as the digital multimeter 115 of DC voltage measurement shelves, be connected with computer unit 13 by 232 serial ports, data are sent to computer unit 13;
Sliding stand module 12 does straight reciprocating motion for driving test sample 114, and forms relative motion between fixed test contact 113, to simulate sliding condition, comprises fixed station 121, ball screw assembly, 122, stepper motor 123 and motor driver 124;
Test sample 114 is fixed on fixed station 121 surface on the slide block of ball screw assembly, 122, and the leading screw of ball screw assembly, 122 is connected with stepper motor 123, the rotary motion of stepper motor 123 can be converted to the rectilinear motion of fixed station 121.Signal is sent to motor driver 124 by computer unit 13, by the frequency of pulse signal that sends and the rotating speed of quantity control step motor 123 and stop position, test sample 114 can be controlled relative to the point-to-point speed of test contact 113 and stop position.By changing the counterweight weight that normal pressure applying device 112 applies, then can the contact of regulating action between test contact 113 and test sample 114, the Contact Resistance test under different contact can be carried out;
Pedestal 14, for the physical construction of support system, isolation environment vibration, impact on Contact Resistance test impact but existing Contact Resistance test macro there are the following problems:
1, less stable in Contact Resistance test process.In a slipping situation, because contact and print surface are not absolute level and smooth, there is certain roughness, so when contact slides relative to print, contact can produce jump phenomena because of instantaneous impact upwards, and the structure that this normal pressure applying device does not suppress contact upwards to bounce, cause the size of normal pressure to suddenly change, and cause the circuit meeting open circuit between contact and print time contact upwards bounces, cause experimental data to be suddenlyd change.
2, the accurate location cannot carrying out slipway location on plaques is chosen.The installation of print on objective table does not have locating device, and dismounting cannot make follow-up slip be positioned on original slideway after installing again, limits and tests in the slip repeatedly of plaques same position.
3, the direct relation with swept resistance cannot be set up at the different eroded areas of slideway.Resistance measurement in sliding process is same time interval sampling, and slip is variable motion, and each resistance value cannot be corresponding with the contact position in slideway.
4, the temperature value of contact interface cannot be measured.Existing Contact Resistance test macro does not have temperature measuring equipment.
5, test channel is less.Existing Contact Resistance test macro only has 1 passage, can only to one group of contact to carrying out acceleration sliding die draft experiment, and conventional efficient is very low.
Summary of the invention
In view of this, a fundamental purpose of the present invention is to provide a kind of slip testing system of electric contact simulation, improves the precision that in sliding process, contact resistance is tested automatically.
For achieving the above object, the invention provides a kind of slip testing system of electric contact simulation, with contact and print simulating contact pair, contact can do sliding relative movement with print, and native system accurately can measure contact in the position in slideway, and the voltage drop of measuring correspondence position with contact interface temperature data, the unit realizing this feature comprises: sliding stand module, slip control module, slip measurement module, wherein
Sliding stand module, for the slip of sending according to control module and steering order, under the contact of setting, makes fixing contact wherein and print produce relative sliding;
Slip control module, move for the instruction control step driven by motor slide mechanism sent according to computing machine and feed back sliding position information, slip control module comprises again: computer unit, stepper motor and drive unit, angle measurement unit;
Computer unit, for exporting the control signal of stepper motor;
Stepper motor and drive unit, for the motion driving slide mechanism to produce expection;
Angle measurement unit, for moment feedback contact to the position at sliding rail, often detects electric machine rotation angle, by computer unit, controls collection one secondary data, realize the corresponding relation of data and position;
Slip measurement module, for slide in connector contact to carrying out dynamic contact resistance measurement, slip measurement module comprises again: four-point method device for measuring electric resistance, temperature measuring equipment, data collector, computer unit;
Four-point method device for measuring electric resistance, for measuring the right resistance of contact, providing constant electric current by constant current source, measuring the pressure drop that contact is right;
Temperature measuring equipment, for detecting the temperature of contact area by the method for indirect inspection;
Data collector, for gathering contact to upper pressure drop, and imports data into computer unit;
Computer unit, for processing the data gathered, display, stores.
Preferably, described system can show in sliding process and contacts right temperature, and the unit realizing this feature comprises: the temperature measuring equipment in sliding stand control module and computer unit
Temperature measuring equipment, for measuring the temperature of contact to lower end, by mathematical computations, the temperature of indirect inspection sliding area, and import temperature signal into computer unit;
Computer unit, for showing the temperature data of reception;
Preferably, described sliding stand module can realize test contact sets amplitude and frequency straight reciprocating motion relative to test sample, and can accurately locate, realize the accurate applying of normal force in slip experiment, sliding stand module comprises: X contacts force applying unit to moving cell, Y-direction moving cell with Z-direction
X, to moving cell, to insulate with other mechanical systems for fixing print, accepts slip that control module sends and steering order, produces the straight reciprocating motion of characteristic frequency;
Y-direction moving cell, for changing the position of contact perpendicular to print direction of motion, and is accurately positioned at a certain position;
Z-direction contact force applying unit, for the contact of test sample and test contact composition between apply accurate normal direction and apply power, and keep normal direction to apply the stable of power.
Preferably, described Y-direction moving cell comprises: handwheel, overrunning clutch, ball screw assembly, Y-direction web member, leading screw support and overrunning clutch support,
Handwheel, for by the angle of rotation by clear and definite the showing of scale;
Overrunning clutch, for contact being accurately positioned at the desired location perpendicular to print direction of motion, and keeps stable;
Ball screw assembly, converts rectilinear motion to for the rotary motion produced by handle;
Y-direction web member, for supporting Z-direction contact force applying unit, can make Z-direction contact force applying unit position in the Y direction be controlled by handwheel;
Leading screw support, for supporting ball screw assembly, and makes the axis of ball screw assembly, and the dead in line of overrunning clutch;
Overrunning clutch support, for supporting overrunning clutch, and makes the axis of overrunning clutch and the dead in line of support ball screw assembly.
Accompanying drawing explanation
Fig. 1 is existing Contact Resistance test system structure schematic diagram;
Fig. 2 is the system architecture schematic diagram of embodiment of the present invention test Contact Resistance;
Fig. 3 is that X is to moving cell structural representation;
Fig. 4 is Y-direction moving cell schematic diagram;
Fig. 5 is the system software program block diagram of embodiment of the present invention test Contact Resistance.
Embodiment
The present invention arranges slip controling parameters by slip control module, and perform parameter instruction to sliding unit, sliding stand module is moved to moving cell according to instruction control X, and angle measurement unit feedback displacement information is to computer unit simultaneously; Print is fixed on X on the positioning table of moving cell, and contact is fixed on the end of Z-direction contact force applying unit, vertical contact with print formation contact right, by the Temperature numerical of temperature measuring equipment and computer unit Dynamic Announce contact area; Contact is applied on contact by Z-direction contact force applying unit, the electric current that constant current source provides contact right, and data collecting card gathers the pressure drop between print and contact, is sent to computer unit by pci bus; Computer unit carries out data processing to sampled data and figure shows and is saved on disk.
For making the object, technical solutions and advantages of the present invention clearly, the present invention is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.
Fig. 2 is the system architecture schematic diagram of embodiment of the present invention test Contact Resistance, can realize the simulation simultaneously carrying out four groups of slip electrical contacts, and carries out the collection of data, process and display.For convenience of description, only signal explanation is carried out to the structure of one of them passage in Fig. 2.As shown in Figure 2, the system of embodiment of the present invention test Contact Resistance comprises: sliding stand module 21, slip measurement module 22, slip control module 23.Modules is described below:
The physical construction that sliding stand module comprises whole system and the mechanism arrangement be fixed on.This unit comprises pedestal 211, X, Y-direction moving cell 212, temperature measuring equipment 213, test sample 214, test contact 215, Z-direction contact force applying unit 216.
Pedestal 211, for supporting stepper motor 232 and slip objective table, regulating system is in horizontality, and isolation environment vibrates, impact the impact tested Contact Resistance;
Test sample 214 is fixed on the print positioning table surface of slip objective table, test contact 215 is fixed on the end of normal pressure applying device 216, slip control module 23 controls to produce relative sliding between test contact 215 and test sample 214, temperature measuring equipment 213 is secured in the below of test sample 214, for monitoring the temperature variation in sliding process, temperature value signal is passed in computer unit 223 carries out data display; Slip objective table can also accurate adjustment and assignment test contact 215 at test sample 214 in the distance perpendicular to glide direction.
X, Y-direction moving cell 212 comprise: X to moving cell, Y-direction moving cell, wherein
X, to moving cell, insulate with other mechanical systems for fixing print, receives slip and steering order that slip control module 23 sends, drives test sample 114 to produce the straight reciprocating motion of characteristic frequency and amplitude.
Fig. 3 be X to moving cell structural representation, as shown in Figure 3, this unit comprises stepper motor 301, shaft coupling 302, crank disc 303, connecting rod 304, objective table 305, insulating mat 306, positioning table 307, wherein
Crank disc 303, connecting rod 304 and objective table 305 form centric slider-crank mechanism, the rotary motion that stepper motor 301 produces can be converted to the linear reciprocating motion of objective table 305.Stepper motor 301 is connected with crank disc 303 by shaft coupling 302, crank disc 303 forms heart crank block structure together with connecting rod 304, objective table 305, to realize straight reciprocating motion, insulating mat 306 is arranged between objective table 305 and positioning table 407, to realize the insulation between positioning table 307 and mechanical mechanism;
Y-direction moving cell, for changing the position of test contact 215 perpendicular to test sample 214 direction of motion, test contact 215 is accurately positioned at the desired location perpendicular to test sample 214 direction of motion, Fig. 4 is Y-direction moving cell structural representation, as shown in Figure 4, this unit comprises handwheel 401, overrunning clutch 402, ball screw assembly, 403, Y-direction web member 404, leading screw support 405 and overrunning clutch support 406;
Handwheel 401, for by the angle of rotation by clear and definite the showing of scale, overrunning clutch 402 for keeping the stable of contact and print Y-direction relative position in slip simulation process, ball screw assembly, 403 converts rectilinear motion to for the rotary motion produced by handwheel 401, Y-direction web member 404, for supporting Z-direction contact force applying unit, Z-direction contact force applying unit position handwheel in the Y direction can be made to control, overrunning clutch 402 is erected the height of setting by overrunning clutch support 405, with the axis coinciding in the axle center and ball screw assembly, 403 that make overrunning clutch 402, be convenient to install and use,
Z-direction contact force applying unit 216, for contact that test sample 214 and test contact 215 are formed between apply accurate normal direction and apply power, and keep normal direction to apply the stable of power.
Slip measurement module 22, for slide in connector contact to carrying out dynamic contact resistance test, comprise constant current source 222, normal pressure applying device 216, test contact 215, test sample 214 and data collecting card 221.
Constant current source 222, for providing predetermined steady current, first end is connected with test contact 215, second end is connected with test sample 214, for experimentally needing the steady current exporting test circuit, such as, in the present embodiment, because the system of testing Contact Resistance is applied to the communications field, the electric current that constant current source 222 exports can not be too large, in order to avoid puncture the surface contamination rete that connector formed in environment for use, generally should more than 100 milliamperes (mA), and be provided with voltage-limiting protection, squeeze in constant current output situation, if output voltage reaches voltage limiting value, constant current source will be automatically brought to constant voltage (voltage limiting value) and export,
The difference analogue input end of data collecting card 221, one end is connected with test contact 215 side, one end is connected with test sample 214 opposite side, for gathering the voltage drop at test contact 215 and test sample 214 two ends, and inputs computer unit 223 and carries out data processing;
Normal pressure applying device 216, applies predetermined contact for experimentally needing to test contact 215.The weight of the counterweight put by adjustment normal pressure applying device 216 top, just can change normal pressure applying device 216 be applied to contact between test contact 215 and test sample 214, because the weight of normal pressure applying device 216 pairs of counterweights has certain counteracting, so sensor should be used before the experiments to demarcate normal pressure applying device.
Slip control module 23, for controlling the motion that sliding stand module carries out setting, comprises motor driver 231, stepper motor 232, angle measurement unit 233 and computer unit 223.
By setting sliding motion parameter in computer unit 223, the sliding motion instruction rear drive stepper motor 232 that motor driver 231 receives from computer unit 223 carries out setting running, drives slip objective table to move back and forth; Angle measurement unit 233 measures angle displacement in stepper motor 232 operation process and by data feedback to computer unit 223, computer unit 223 often receives an angle displacement signal, control data capture card 221 gathers primary voltage data, realizes the corresponding relation of position and voltage data.
Computer unit 223, for data collecting card 221, stepper motor 232, angle measurement unit 233 and temperature measuring equipment 213 communicate, and in addition, computer unit 223 comprises the software of system, software is developed based in Labview environment, and its flow chart as shown in Figure 5.After opening program, carry out initialization, user slides in interface input and controls and experiment annotation parameter; Open program, program brings into operation, carry out Electric Machine Control and data acquisition two threads simultaneously, Electric Machine Control sends instruction to the counter of data collecting card 221 by program, counter is made to produce corresponding gating pulse, thus Driving Stepping Motor 232 carries out the running in setpoint frequency and cycle, learn that stepper motor 232 operates an angle by angle measurement unit 233, gather primary voltage signal will to program signal, the data collected can be carried out data processing, data display and data in real time and be stored; If do not complete designated period, program can proceed step motor control and data acquisition; After completing designated period, program can stop automatically, quits a program.
From above-mentioned, a kind of slip testing system of electric contact simulation of the present invention, can contact right relative sliding situation in real simulation low-pressure field.This system accurately can be located each sampled data points, and the contact collected is carried out data storage, process and figure display to fall voltage signal, then calculate contact resistance value, this system also can measure the contact interface temperature with resistance value correspondence position.The present invention can increase the test channel of Contact Resistance, and can accurately locate, and measures contact resistance value and the contact interface temperature value of correspondence position, improves the precision of Contact Resistance test, reduce the complicacy of experimental implementation.
More than lift preferred embodiment; the purpose of this utility model, technical scheme and advantage are further described; be understood that; the foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle; any amendment of doing, equivalent replacement, improvement etc.; all should be included within protection domain of the present utility model; the interest field that the utility model is advocated should be as the criterion described in utility model application scope, but not is only limitted to above-described embodiment.
Claims (3)
1. a slip testing system of electric contact simulation, it is characterized in that, with contact relative to print slip simulating contact between relative sliding situation, and measure Contact Resistance data and contact interface temperature data, this system comprises: sliding stand module, slip control module, slip measurement module, wherein
Sliding stand module, for the slip of sending according to slip control module and steering order, under the contact of setting, the contact made and print produce relative sliding, and the initial position accurately between positioning contact and print, provide reference point for measuring the position of contact in slideway;
Slip control module, comprise: computer unit, stepper motor and angle measurement unit, slide and steering order for exporting to sliding stand module, according to the steering order control step driven by motor sliding stand block motion that computer unit sends, and by the angle displacement in angle measurement unit measurement stepper motor operation process to feed back sliding position information;
Slip measurement module, for the contact in sliding to carrying out dynamic contact resistance measurement, and the temperature survey of contact interface;
Described sliding stand module comprises: X to moving cell, Y-direction moving cell and Z-direction contact force applying unit, wherein
X is to moving cell, to insulate with other mechanical systems for fixing print, the slip that reception slip control module is sent and steering order, produce the straight reciprocating motion of characteristic frequency, this unit comprises insulation spacer, objective table, rail plate, connecting rod, crank disc, shaft coupling, stepper motor;
Y-direction moving cell, for changing the position of contact perpendicular to print direction of motion, and be accurately positioned at a certain position, this unit comprises ball screw assembly, and overrunning clutch, the rotary motion that ball screw assembly, is used for handle produces converts rectilinear motion to, overrunning clutch for contact being accurately positioned at the desired location perpendicular to print direction of motion, and keeps stable;
Z-direction contact force applying unit, for applying to contact applying accurate normal direction and keep the stable of applying power in sliding process, this unit uses double-diaphragm spring structure, double-diaphragm spring structure axial rigidity is less, good being delivered to of applying power can be made to contact right, radial rigidity is comparatively large, and the shearing force holding structure can effectively resisted in sliding process is stablized.
2. the system as claimed in claim 1, is characterized in that, dynamic contact resistance data can with the position one_to_one corresponding of slide contact zone, what realize this feature has computing machine, stepper motor, angle measurement unit, wherein
Computing machine, for sending instruction control step motor rotation to produce the slip of setpoint frequency amplitude;
Stepper motor, produces to-and-fro movement for taking crank block to;
Angle measurement unit, for feeding back the right real time position of sliding contact.
3. the system as claimed in claim 1, is characterized in that, shown in sliding process by the mode of indirect inspection and contact right temperature, what realize this feature has temperature measuring equipment, NI data collecting card, computing machine, wherein
Temperature measuring equipment, for detecting the temperature of contact area by the method for indirect inspection;
NI data collecting card, for the temperature signal that acquisition testing arrives;
Computing machine, for the temperature data that Dynamic Announce collects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210007486.2A CN102565537B (en) | 2012-01-11 | 2012-01-11 | A kind of slip testing system of electric contact simulation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210007486.2A CN102565537B (en) | 2012-01-11 | 2012-01-11 | A kind of slip testing system of electric contact simulation |
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| CN102565537A CN102565537A (en) | 2012-07-11 |
| CN102565537B true CN102565537B (en) | 2015-10-07 |
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| CN105372499B (en) * | 2015-11-25 | 2018-05-04 | 亿和精密工业（苏州）有限公司 | A kind of microresistivity survey equipment and measuring method |
| CN106053335A (en) * | 2016-05-30 | 2016-10-26 | 华为技术有限公司 | Sliding simulation testing system |
| CN109828155B (en) * | 2019-02-28 | 2024-01-12 | 兰州大学 | Three-way loading contact resistance testing device under controllable temperature |
| CN111948457B (en) * | 2020-08-07 | 2023-02-03 | 四川泛华航空仪表电器有限公司 | Resistance card output resistance continuity detection device |
| CN112213239A (en) * | 2020-09-15 | 2021-01-12 | 中车株洲电力机车有限公司 | Simulation test method for contact resistance of electric contact surface polluted by particles |
| CN112540323B (en) * | 2020-12-17 | 2023-08-08 | 中国航空综合技术研究所 | In-situ simulation and online diagnosis method for contact failure of electric connector |
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